首饰包装盒（多功能）

Alpha-pinene lysate, derivative of alpha-pinene lysate, terpolymer of isobutene and diene and preparation method of terpolymer

The invention provides an alpha-pinene lysate and a derivative thereof, an isobutene and diene terpolymer and a preparation method thereof, and in the copolymer system, the content of the alpha-pinene lysate and the derivative thereof is 1-50%, the content of an isobutene monomer is 50-99%, and the content of a diene monomer is 1-50%. By introducing a copolymerization structure of the alpha-pinene lysate and the derivative thereof, the unsaturation degree of a traditional isobutene and diene copolymerization product is improved.

Method for preparing alcohol from light gasoline

The invention is mainly applied to the field of fine chemicals, and provides a method for generating alcohol by hydration reaction on a fixed bed reactor by using water and olefin in light gasoline components as raw materials and using acidic ion exchange resin as a catalyst. The light gasoline is catalytically cracked gasoline of an oil refinery, the dry point is 30-70 DEG C, the hydration reaction temperature is 20-100 DEG C, the reaction pressure is 0.5-1.0 MPa, and C4, C5 and C6 olefins in the raw materials are respectively subjected to hydration reaction with water to generate corresponding alcohols under the action of a strong acid cation exchange resin catalyst. The raw materials are easily available and no three wastes are generated.

Preparation method of large-particle-size and wide-range styrene-butadiene latex

The invention belongs to the technical field of polymer material emulsion polymerization, and particularly relates to a preparation method of large-particle-size and wide-component styrene-butadiene latex. The cationic emulsifier and the pH regulator are added in the polymerization process to agglomerate latex particles, due to the strong electrostatic attraction effect between anions and cations, more latex particles can be adsorbed around the cationic emulsifier, so that along with the proceeding of the reaction, the volume of the latex particles is continuously increased, and the particles collide with one another and agglomerate into large particles; meanwhile, the compounding of the cation and anion emulsifiers can generate strong electrical action, so that the efficiency of surface tension can be reduced, the CMC of the system is reduced, polymerization sites are increased, and the wide distribution of particle sizes is realized. The large-particle-size and wide-distribution styrene-butadiene ...

METHOD FOR TREATING PETROCHEMICAL ALKALINE RESIDUE WASTEWATER

Disclosed is a method for treating petrochemical alkaline residue wastewater. The method comprises the following steps: a) adjusting the pH value of the petrochemical alkaline residue wastewater to 7-12, leaving the wastewater to stand, and removing an organic layer to obtain pretreated wastewater; and b) starting a plasma reactor filled with a resin photocatalyst, and introducing the pretreated wastewater into the plasma reactor for treatment in the presence of oxygen to obtain treated wastewater. The method can effectively improve the removal rate of COD from petrochemical alkaline residue wastewater, the whole treatment process is carried out at a normal temperature and pressure, the process is simple, and continuous operation can be realized. The experimental results indicate that the removal rate of COD from petrochemical alkaline residue wastewater of the method is 98% or more.

Preparation method of high-solid-content latex

The invention provides a preparation method of high-solid-content latex, which comprises the following steps: adding a nonionic emulsifier and an alkylphenol polyoxyethylene ether emulsifier into anionic latex, regulating the pH value to acidity by using hydrochloric acid, and heating to obtain the high-solid-content latex. According to the preparation method of the high-solid-content latex provided by the invention, an original emulsification system is destroyed by adjusting the pH value, a new emulsification system is introduced, and a polymerization emulsification system and an agglomeration emulsification system are separated, so that the agglomeration process is free from the influence of a polymerization reaction, a better agglomeration effect is achieved, and the particle size of the latex is finally increased.

Preparation method of bio-based rubber and vulcanized rubber

The invention provides a preparation method of bio-based rubber. The preparation method comprises the following steps: carrying out emulsion polymerization reaction on an itaconate monomer and a conjugated diene monomer; when it is tested that the itaconate monomer reaches a certain conversion rate, one or more of a molecular weight regulator, a conjugated diene monomer and an emulsifier are added separately, and the bio-based rubber is obtained. According to the preparation method of the bio-based rubber provided by the invention, the conversion rate of the itaconate monomer can reach 99% or above by supplementing the conjugated diene monomer and the emulsifier for multiple times, and the prepared bio-based rubber has relatively low structural gel content, low heat generation and relatively good wear resistance, omits a high-boiling-point monomer removal process, and is energy-saving and environment-friendly.

Method for synthesizing aldehyde compound through hydroformylation of 1, 1-disubstituted olefin

The invention provides a method for synthesizing an aldehyde compound by hydroformylation of 1, 1-disubstituted olefin, which comprises the following steps: reacting 1, 1-disubstituted olefin with a reaction solvent in H2 and CO under the action of a catalyst to obtain the aldehyde compound, the catalyst is a transition metal rhodium complex and an organic phosphine ligand. According to the method for synthesizing the aldehyde compound, provided by the invention, by adopting a specific catalytic system, the selectivity of a target product is greatly improved, and meanwhile, the separation and purification steps of the aldehyde compound are simplified; in addition, the substrate of the hydroformylation reaction is excellent in universality and can be suitable for various 1, 1-disubstituted olefin products, and a novel carbonylation conversion method is provided for olefin substrates which are difficult to activate.

Method for testing low-temperature performance of waterproof asphalt based on creep theory

The invention relates to a method for evaluating the low-temperature crack resistance of a waterproof asphalt coating based on a creep theory, and belongs to the technical field of asphalt performance test.A bending beam rheometer is used for testing, a constant load is applied to detect the displacement change of asphalt at a low temperature, and the creep stiffness of the asphalt can be calculated through the creep theory; by using the method disclosed by the invention, the stress deformation resistance of the waterproof asphalt when the waterproof asphalt is hardened at the low temperature can be evaluated.

Preparation method of styrene-butadiene latex with large particle size and high solid content

The invention belongs to the technical field of new chemical materials, and particularly relates to a preparation method of large-particle-size and high-solid-content styrene-butadiene latex, which comprises the following steps: (1) preparing an agglomerating agent from the following raw materials: 10-50 parts of alkene amide, 1-50 parts of diene anhydride, 1-20 parts of styrene, 1.5-3 parts of an emulsifier, 0.5-1.5 parts of an initiator and 180-220 parts of deionized water, and (2) agglomerating and concentrating at 10-30 DEG C to obtain the large-particle-size and high-solid-content styrene-butadiene latex. The method comprises the following steps of: adding an agglomerating agent which is one hundred thousand to three hundred thousand of the weight of dry glue into the latex, agglomerating for 5-30 minutes, and then evaporating and concentrating to finally obtain the styrene-butadiene latex with the solid content of 65-68%, the viscosity of 700-800cp and the particle size of 300-350nm ...

Three-mode high-solid polymer emulsion and preparation method thereof

According to the three-mode high-solid polymer emulsion and the preparation method thereof provided by the invention, firstly, the spatial distribution and arrangement of the particle size are solved, so that the perfect space filling theory of particles is met, and the solid content is increased; the particle size in the polymerization process is controlled by utilizing different HLB (Hydrophile-Lipophile Balance) values of different emulsifiers, the emulsification effect of the emulsifiers and the size difference of formed micelles, and the latex with a certain proportion of particle size distribution is formed through pre-polymerization and mixed polymerization, so that the problem that the particle size distribution of the latex is in a certain interval range is solved; thirdly, the agglomerating agent acts on a single emulsifier to realize colloidal particle growth, so that the problem of latex particle size regularity is solved; and fourthly, the preparation of various high-solid ...

Method for checking and accepting waterproof asphalt

The invention relates to the field of asphalt detection, in particular to a waterproof asphalt acceptance method which comprises the following steps: preparing sample asphalt into a dumbbell-shaped test piece; performing constant-temperature freezing treatment on the dumbbell-shaped test piece at a target experimental temperature for a first preset time; performing a tensile fracture test on the dumbbell-shaped test piece subjected to the constant-temperature freezing treatment at the target experimental temperature to obtain tensile fracture parameters; determining the ultimate tensile strain and fracture energy of the sample asphalt according to the tensile fracture parameters; judging whether parameters of the sample asphalt reach the standard or not according to the ultimate tensile strain and the fracture energy; when the parameters of the sample asphalt reach the standard, it is determined that acceptance inspection of the sample asphalt is successful, and a corresponding sampling ...

Butyl rubber and preparation method thereof

The invention provides butyl rubber and a preparation method thereof, and the preparation method comprises the following steps: in the presence of a catalyst, mixing a slurry stabilizer solution, monoolefine, dialkene and a reaction solvent to obtain a reactant solution, reacting, and adding a terminator to obtain the butyl rubber, the slurry stabilizer is selected from a styrene-isobutylene block copolymer and/or a styrene-isobutylene-styrene block copolymer. The slurry stabilizer is introduced in the polymerization process, has both a lyophilic part and a lyophobic part, and can effectively reduce the polymerization speed of cationic living polymerization, inhibit product agglomeration, improve the dispersion state of butyl rubber in a polymerization system, enhance mass transfer and heat transfer of the polymerization system, relieve blockage of a reaction kettle and prolong the reaction period; the single concentration is improved, continuous production of a butyl rubber device is guaranteed ...

Emulsified asphalt for waterproof coating and preparation method thereof

The invention relates to emulsified asphalt for waterproof paint and a preparation method thereof, the emulsified asphalt is composed of liquid soap and asphalt according to a mass ratio of (35-45): (65-55), and the liquid soap comprises 0.1 wt%-1.0 wt% of an emulsifier A, 2.0 wt%-3.0 wt% of an emulsifier B, 0.01 wt%-0.1 wt% of a stabilizer and the balance of water; wherein the emulsifier A is a zwitterionic emulsifier; and the emulsifier B is an anionic slow-breaking emulsifier. Compared with the prior art, the emulsified asphalt for the waterproof coating, provided by the invention, has the advantages of high solid content, extremely low content of residues on a sieve, good system stability and convenience in spraying construction.

Polyolefin catalyst containing nucleating agent as well as preparation method and application of polyolefin catalyst

The invention provides a composite material containing a nucleating agent. The composite material comprises a carrier; the transition metal halide, the internal electron donor, the nucleating agent and the alpha olefin polymer are compounded on the carrier. The composite material which has a specific structure and a specific combination and contains the nucleating agent also has a core-shell structure and a spherical particle shape with a regular appearance. The composite material provided by the invention is used as a polyolefin catalyst to catalyze olefin polymerization so as to efficiently synthesize high-crystallinity polyolefin, and the polyolefin product is in a good particle form. According to the polyolefin solid catalyst provided by the invention, an alpha olefin polymer is introduced into catalyst particles before a polymer nucleating agent is prepared, so that the strength of the solid catalyst particles is improved, and good particle morphology of a Z-N catalyst is maintained ...

Butyl rubber with wide molecular weight distribution and synthesis method thereof

The invention provides butyl rubber with wide molecular weight distribution and a synthesis method thereof, and the method comprises the following steps: carrying out slurry polymerization reaction on a polymeric monomer in a mixed solvent in the presence of an initiator and a chain transfer agent to obtain the butyl rubber, the polymeric monomers comprise isobutene and isoprene, the mixed solvent comprises a polarity regulator, a polymerization solvent-methyl chloride is optionally adopted, and the chain transfer agent is selected from C4-10 straight-chain olefin, C4-10 branched-chain olefin or cycloolefin; and the polarity regulator is selected from fluoro hydrocarbon CxHyFz. According to the method, the high molecular weight part and the low molecular weight part can be simultaneously regulated and controlled in the butyl rubber polymerization process, and the butyl rubber with wide molecular weight distribution is obtained, so that the obtained butyl rubber has high raw rubber strength ...

Low-temperature performance improver for waterproof asphalt, preparation method of low-temperature performance improver and waterproof asphalt

The invention provides a low-temperature performance improver for waterproof asphalt, a preparation method of the low-temperature performance improver and the waterproof asphalt. The low-temperature performance improver for the waterproof asphalt, provided by the invention, comprises the following components in parts by mass: 50-80 parts of vacuum line oil, 1-5 parts of furfural extract oil, 5-20 parts of mineral oil, 5-20 parts of aromatic oil and 5-20 parts of vacuum residue. Certain vacuum linear oil, furfural extract oil, mineral oil, aromatic hydrocarbon oil and vacuum residual oil are matched and blended according to a certain proportion, the component proportion of the waterproof asphalt can be changed, the low-temperature performance of the asphalt can be improved, the stability of the softening point and the needle penetration can be guaranteed, and adverse effects on the softening point and the needle penetration can be avoided.

METHOD FOR INDUSTRIAL PRODUCTION OF TRANS-BUTADIENE-ISOPRENE COPOLYMER RUBBER AND APPARATUS THEREFOR

The present invention relates to a method for industrial production of a butadiene-isoprene copolymer rubber having a trans-1,4-structure (TBIR) and an apparatus for implementing the method. The production method comprises: pumping a predetermined amount of a butadiene and an isoprene into a polymerization reactor, and performing bulk polymerization in the presence of a catalyst to obtain TBIR; performing extrusion, devolatilization, granulation and drying on the produced TBIR, and then packaging the produced TBIR; and separating unreacted monomers by a recovery and separation device followed by separately refining the unreacted monomers, and then returning the unreacted monomers to a batching device or a storage tank. The production apparatus comprises a recovery and refining unit, a polymerization unit, a post-treatment unit and a utility unit. By means of the production apparatus and the production method, the present invention allows industrial production of TBIR by bulk polymerization ...

Hydrophilic modified polypropylene non-woven fabric as well as preparation method and application thereof

The invention provides a hydrophilic modified polypropylene non-woven fabric. According to the hydrophilic modified polypropylene non-woven fabric provided by the invention, the grafting rate of the functional monomer is relatively high, and the self-polymerization component of the functional monomer is added, so that the obtained hydrophilic modified polypropylene non-woven fabric has stronger hydrophilicity. Moreover, after the non-reactive inorganic or organic additives are added into the solvent, the mixing is more uniform, the product batch is more stable, and no special requirement on equipment exists. Therefore, compared with a traditional surface treatment method, the hydrophilic effect is more durable.

Method for preparing conjugated diene latex with large particle size and high solid content

The invention belongs to the field of high polymer materials, and particularly relates to a method for preparing conjugated diene latex with large particle size and high solid content, which comprises the following steps: a) mixing basic conjugated diene latex, a stabilizer and acid, and homogenizing in a homogenizer to obtain latex to be dehydrated; b) dehydrating the latex to be dehydrated, and then mixing with a stabilizer and alkali to obtain the conjugated diene latex with large particle size and high solid content, in the step a) and the step b), the stabilizer comprises an emulsifier and a diffusant. According to the method provided by the invention, mechanical agglomeration and acid agglomeration are combined, and the use of the stabilizer and later alkali adjustment are matched, so that the solid content and the particle size of the conjugated diene latex are remarkably improved on the premise of not damaging the stability and the application performance of the latex. The method ...

High-viscosity high-elasticity modified asphalt and preparation method thereof

The invention relates to high-viscosity and high-elasticity modified asphalt, which is prepared from the following components in parts by weight: 75 to 100 parts of residual oil, 1.5 to 2.5 parts of cosolvent, 4 to 5 parts of polymer modifier, 4 to 6 parts of high-viscosity modifier and 0.2 to 0.4 part of stabilizer. By adding the specific modifier, the 60 DEG C dynamic viscosity of the modified asphalt is greatly improved, the elasticity is recovered, and the long-term use of the asphalt pavement is facilitated; the residual oil and the cosolvent are optimized, and the proper residual oil and cosolvent are selected for preparing the modified asphalt, so that the compatibility between the residual oil and the modifier is improved, the compatibility between the raw materials and the auxiliary materials is improved, and the application performance of the high-viscosity and high-elasticity modified asphalt is improved.

Method for preparing cyclopentanone by selective oxidation of cyclopentane

The invention provides a method for producing cyclopentanone by selective oxidation of cyclopentane, cyclopentanone is synthesized by a one-step method at a certain temperature and pressure by using cyclopentane as a raw material, a titanium silicalite molecular sieve as a catalyst and hydrogen peroxide as an oxidizing agent, the selectivity of cyclopentanone is greater than or equal to 99%, and the selectivity of cyclopentanone is greater than or equal to 99%. The problems of high yield of three wastes, difficulty in product separation and low selectivity of cyclopentanone in the existing cyclopentanone production process are effectively solved.

METHOD FOR SEPARATING SOLUBLE ORGANIC MATTERS FROM PETROLEUM COKE

A method for separating soluble organic matters from petroleum coke. The method comprises the following steps: drying petroleum coke to obtain a pre-processed petroleum coke; and performing stage-by-stage extraction on the pre-processed petroleum coke by using petroleum ether, carbon disulfide, ethyl alcohol, acetone-carbon disulfide mixed liquor and tetrahydrofuran to obtain an extract liquor and processed petroleum coke, the extract liquor comprising soluble organic matters.

Qualitative method for identifying coal tar contained in crude oil

The invention provides a qualitative method for identifying coal tar contained in crude oil, which comprises the following steps: A) heating and distilling an oil product, and recovering a distillate at 160-230 DEG C to obtain the distillate; and B) detecting the content of phenolic compounds in the distillate, if the concentration of the phenolic compounds is greater than or equal to 0.2 mg/mL, determining that the oil product contains coal tar, and if the concentration of the phenolic compounds is greater than 0 and less than 0.2 mg/mL, determining that the oil product does not contain coal tar. In the method for identifying whether the crude oil contains the coal tar, a conventional detection method is adopted to detect whether the crude oil contains components (phenolic substances) in the coal tar in a specific distillation range, and whether the crude oil contains the coal tar is qualitatively judged.

High-temperature solution polymerization process for copolymerization of ethylene and alpha-olefin

The invention provides a process for preparing a polyolefin elastomer by copolymerization of ethylene and alpha-olefin, a specific feeding mode is adopted, part of ethylene monomer, alpha-olefin, a solvent and a cocatalyst are mixed in a static mixer and then enter a polymerization reaction kettle together with a catalyst, so that the mass transfer time is prolonged; ethylene is uniformly dispersed and the impurity removal effect is improved, so that the activity of the catalyst is improved; particularly, a tubular reactor and a tank reactor are connected in series, so that the conversion rate of ethylene and alpha-olefin can be effectively increased, and the reaction system is relatively stable; the tubular reactor and the tank reactor are combined, so that the heat exchange area is large, the reaction heat can be better removed, and the reaction is stable. The reactor has the advantages of high catalytic efficiency, avoidance of multi-kettle reaction, large heat exchange area, high conversion ...

Butyl latex, butyl latex dairy product and preparation method thereof

The invention provides butyl latex. The butyl latex comprises the following components in parts by weight: 10-20 parts of butyl rubber; 0-20 parts by weight of a nanometer reinforcing filler; 1-6.5 parts by weight of an emulsifier; 0.05-1 part by weight of a co-emulsifier; and 0.05-2 parts by weight of a stabilizing agent. Compared with the prior art, the nano filler and the butyl rubber liquid are blended in advance and then emulsified, and meanwhile, the ratio of the emulsifier is optimized, so that not only is the dispersity of the nano filler improved, but also the mixing uniformity between the reinforcing filler and the butyl rubber is improved; according to the present invention, the non-uniform mixing or demulsification phenomenon caused by the later addition of the reinforcing filler is avoided, the reinforcement of the butyl rubber dairy product is achieved, and the lamellar filler is dispersed in the butyl rubber matrix, such that the permeation path of the gas, the virus, the ...

Catalyst for preparing high-carbon olefin as well as preparation method and application of catalyst

The invention provides a catalyst for preparing high-carbon olefin and a preparation method and application thereof, in the application method, the oligomerization catalyst is composed of an auxiliary component and a main component, the main component is a specific SO4 < 2->/SiO2/ZrO2/Al2O3 molecular sieve system, and the auxiliary component is a La2O3/SiO2/TiO2/Al2O3 molecular sieve system. The catalyst provided by the invention is suitable for taking mixed C4 obtained after isobutene extraction as a raw material, and a fixed bed reactor is adopted for reaction under certain use conditions; experimental results show that the C4 olefin conversion rate is 70-83%, the C8 olefin selectivity is 45-60%, the C12 olefin selectivity is 30-42%, and the rest component is C16 olefin. The catalyst disclosed by the invention is mainly used for realizing controllable production of olefins with different carbon numbers by deeply analyzing an olefin polymerization reaction mechanism, creatively regulating ...

Preparation method of mixed tridecanal

The invention relates to the technical field of organic synthesis, in particular to a preparation method of mixed tridecanal. The invention provides a preparation method of mixed tridecanal, which comprises the following steps: under the condition of carbon monoxide and hydrogen, mixing a rhodium catalyst, an organic phosphine oxide ligand, mixed dodecene and a solvent, and reacting to obtain the mixed tridecanal. According to the method, the target product can be efficiently and selectively synthesized by regulating and controlling the catalyst through the organic phosphine oxide ligand, the conversion rate of the substrate and the yield of the product are relatively high, and the method has a good industrial prospect. Meanwhile, compared with a high-pressure cobalt method, the preparation method provided by the invention is relatively mild in condition and easy to operate, and the problems of catalyst deactivation and difficult circulation are avoided.

Olefin polymerization catalyst and preparation method thereof, and olefin polymerization method

The invention provides an olefin polymerization catalyst and a preparation method thereof, and an olefin polymerization method. According to the catalyst provided by the invention, a main catalyst is prepared from the following raw materials: (1) a titanium compound Ti (OR) m-yXy; (2) an adduct of a magnesium compound MgR < 13 > R < 14 >. F > RoOH. GE. HH < 2 > O; (3) an internal electron donor; wherein the internal electron donors are an internal electron donor a, an internal electron donor b and an internal electron donor c, the internal electron donors a, b and c are compounds with certain structures, and the internal electron donors a, b and c are matched according to a certain proportion to form a catalyst system, and when the catalyst system is used for preparing polyolefin by catalyzing olefin polymerization, the polymerization activity is high, the hydrogen regulation sensitivity is very high, the molecular weight distribution is relatively wide, and the molecular weight distribution ...

Preparation process of ultra-concentrated styrene-butadiene latex emulsion

The invention belongs to the field of new material preparation, and provides a styrene-butadiene latex ultra-concentrated emulsion preparation process which is mainly characterized in that on the basis of an existing styrene-butadiene latex concentration process, the wall of a concentration kettle is coated with a polysiloxane heat-resistant hydrophobic coating, through the improvement, in the concentration process, the wall hanging phenomenon does not exist in the concentration kettle, and the concentration kettle is not prone to falling off. Therefore, the utilization rate of the latex is improved. Specifically, butadiene and styrene serve as monomers, under the action of an emulsifier and other auxiliaries, low-concentration latex is formed through specific temperature, pressure and emulsion polymerization, the solid content of the latex can reach 80%-90% through measurement in the later period of concentration, the comprehensive production cost is low, and the requirements for green ...

Preparation method of tert-amyl alcohol

The invention provides a preparation method of tert-amyl alcohol. According to the preparation method provided by the invention, the light gasoline is used as a raw material, and the tert-amyl alcohol is obtained through a synthesis reaction by a synthesis device; wherein the synthesis device is described in the following, and the process of the synthesis reaction is described in the following steps S1 to S4. The device is combined with the synthesis process of the steps S1-S4, and more importantly, the operation condition of each tower in the synthesis process is controlled, so that the conversion rate is increased, the product purity is improved, and the water content of the product is reduced. Test results show that according to the preparation method, the conversion rate reaches 60% or above, the product purity reaches 99% or above, and the water content of the product is smaller than 100 ppm.

Anti-aging high-viscosity modified asphalt and preparation method thereof

The invention provides anti-aging high-viscosity modified asphalt. The anti-aging high-viscosity modified asphalt is prepared from the following raw materials in parts by weight: 100 parts of petroleum asphalt; 4 to 7 parts by weight of a styrene-butadiene-styrene block copolymer; 3 to 5 parts by weight of a styrene-hydrogenated butadiene-styrene block copolymer; the anti-aging component 1 is 1-4 parts by weight; the anti-aging component 2 is 0.4 to 0.6 part by weight; 0.3 part by weight to 0.7 part by weight of a viscosity reducing component; 2-6 parts by weight of a cosolvent; and 0.2 to 0.4 part by weight of a stabilizing agent. Compared with the prior art, the anti-aging and high-viscosity modified asphalt provided by the invention adopts specific components with specific contents, so that relatively good overall interaction is realized, and the obtained anti-aging and high-viscosity modified asphalt has excellent anti-aging performance and also has other indexes such as viscosity, ...

Pretreatment method of raw materials in polyolefin polymerization process

The present invention provides a polyolefin polymerization raw material pretreatment method, which comprises: carrying out dechlorination on a liquid material to obtain a dechlorinated liquid material, and removing water, sulfur, peroxide, a hydroxyl compound and oxygen to obtain a pretreated liquid material; dissolving the solid material in a solvent, and then carrying out the liquid material pretreatment step; the method comprises the following steps: carrying out dechlorination and desulfurization on a gas material, carrying out deoxygenation and hydrodeacetylation processes, removing carbon monoxide, and finally removing water, methanol, oxygen and carbon dioxide to obtain a pretreated gas material. The pretreatment method provided by the invention is a systematic, comprehensive and efficient method and can be used for pretreating solid, liquid and gas-state materials, the purity of the pretreated materials can reach technical index regulations, meanwhile, the catalyst consumption in ...

Method for preparing C6 aldehyde through direct hydroformylation of light gasoline

The invention provides a method for preparing C6 aldehyde by direct hydroformylation of light gasoline, which comprises the following steps: mixing a solvent, a metal element-containing catalyst, a ligand and light gasoline in a mass ratio of (0-95): (5-100) to obtain a reaction solution; and introducing a mixed gas of CO and H2 into the reaction liquid, and reacting to obtain C6 aldehyde. According to the method provided by the invention, olefin in the light gasoline is fully utilized to prepare C6 aldehyde, the additional value of the light gasoline is improved, and meanwhile, the technical scheme is simple in process flow and low in equipment investment and energy consumption.

Method for measuring grafting rate of polyolefin graft

The invention belongs to the field of chemical analysis, and particularly relates to a method for measuring the grafting rate of a polyolefin graft, which comprises the following steps of: a) obtaining a working curve: carrying out chemical grafting reaction on a grafting monomer and polyolefin in a solvent in the presence of an initiator, calculating the grafting rate of the polyolefin graft according to the quantitative relationship between the reactant and the product before and after the reaction; performing infrared spectroscopic analysis on the polyolefin graft to obtain an analysis result; further obtaining a series of polyolefin grafts prepared from grafting monomers and polyolefin in different proportions, and corresponding grafting rates and infrared spectroscopic analysis results; fitting a working curve of a grafting rate-infrared spectroscopic analysis result; and b) carrying out infrared spectroscopic analysis on the polyolefin graft sample to be detected, and obtaining the ...

Production method and application of low-viscosity building waterproof material asphalt

The invention relates to a production method and application of low-viscosity building waterproof material asphalt, and the production method comprises the following steps: mixing crude oil and oil slurry according to a set mass ratio, and carrying out atmospheric and vacuum distillation processing by adopting an atmospheric and vacuum distillation process production method to obtain the low-viscosity building waterproof material asphalt. According to the technical scheme, the low-viscosity waterproof material asphalt is produced by adjusting the raw material formula for asphalt production, introducing the oil slurry with a specific proportion and specific parameters into the crude oil and adopting a specific atmospheric and vacuum distillation process, and the low viscosity refers to the low viscosity of the asphalt instead of the low viscosity achieved by adding an additive, so that the waterproof performance of the asphalt is improved. The modified asphalt waterproof coiled material ...

Supported Ziegler-Natta catalyst as well as preparation method and application thereof

The invention provides a supported Ziegler-Natta catalyst. The supported Ziegler-Natta catalyst comprises a carrier, transition metal organic halide and/or transition metal halide, an internal electron donor and a nucleating agent, wherein the transition metal organic halide and/or transition metal halide are/is supported on the carrier. Compared with the prior art, the nucleating agent on the surface and in the pores of the supported Ziegler-Natta catalyst provided by the invention can be uniformly dispersed in a reaction system along with the crushing of the catalyst in the olefin polymerization process, so that the uniformity of the reaction system is improved, and a polyolefin material with high crystallization property can be directly obtained after the polymerization is finished; in addition, a better nucleating effect is shown under the lower nucleating agent concentration.

Preparation method of thermoplastic polyolefin elastomer with high volume resistivity

The invention provides a preparation method of a thermoplastic polyolefin elastomer with high volume resistivity, which comprises the following steps: in the process of preparing the thermoplastic polyolefin elastomer, adsorbing a residual catalyst after a polymerization reaction is completed, and then carrying out flash evaporation to obtain the thermoplastic polyolefin elastomer with high volume resistivity. According to the method, the volume resistivity is controlled by representing the relation between the ash content and the volume resistivity and further controlling the ash content, the problem of current leakage of the photovoltaic module is solved, and the overall progress of the photovoltaic industry in China is improved.

Production method and production device of dimethyl sulfoxide

The invention provides a production method and a production device of dimethyl sulfoxide. The production method comprises the following steps: mixing dimethyl sulfide and hydrogen peroxide according to a molar ratio of 1: (0.7-1.0) at 30-40 DEG C, and carrying out pre-reaction; and reacting the obtained mixed solution in a tubular reactor at 20-28 DEG C to control the selectivity of the product, thereby obtaining the dimethyl sulfoxide. According to the production method provided by the invention, a solvent and a catalyst are not needed, serial operation of a plurality of reactors is not needed, the steps are simpler and more convenient, the equipment investment cost of a production device is lower, and research shows that by adopting the production method provided by the invention, the conversion rate of hydrogen peroxide can reach 99% or above, and the selectivity of dimethyl sulfoxide can reach 99% or above.

Deep high ground stress roadway surrounding rock drilling pressure relief structure and effect evaluation method thereof

The invention discloses a deep high crustal stress roadway surrounding rock drilling pressure relief structure and an effect evaluation method thereof.The deep high crustal stress roadway surrounding rock drilling pressure relief structure comprises pressure relief drilling groups, a stress monitoring system and a displacement monitoring system, and a plurality of pressure relief drilling groups are arranged in surrounding rock at different positions of a roadway at intervals; each pressure relief drill hole group is located in the range from shoulder nests to the side angles on the two sides of the roadway and distributed in a fan shape. The stress monitoring system is pre-buried on one side of the roadway to monitor the stress change of surrounding rock of the roadway before and after drilling of the pressure relief drill hole; the displacement monitoring system is arranged on the surface of the roadway surrounding rock to monitor the displacement evolution characteristics of the roadway ...

Coupling method for synthesizing low-carbon olefin bifunctional catalyst through CO2 hydrogenation and application of coupling method

The invention provides a method for synthesizing a low-carbon olefin bifunctional catalyst through CO2 hydrogenation, which comprises the following steps: A) tabletting composite oxide powder, molding, crushing and screening to obtain an oxide; the composite oxide powder is one or more of ZnO (zinc oxide), ZrO2 (zirconium oxide), In2O3 (indium oxide) and ZrO2 (zirconium oxide); the molecular sieve powder is subjected to tabletting forming, crushing and screening, and molecular sieve particles are obtained; b) physically mixing the oxide and the molecular sieve particles to obtain a mixed material; and C) tabletting, molding, crushing and screening the mixed material to obtain the product. The method provided by the invention comprises molding, screening and secondary molding processes of oxides and molecular sieves. The bifunctional catalyst obtained by the secondary forming coupling method is excellent in activity, high in stability and high in target product selectivity, the selectivity ...

Environment-friendly asphalt modifier as well as preparation method and application thereof

The invention belongs to the field of asphalt, and particularly relates to an environment-friendly asphalt modifier as well as a preparation method and application thereof. The environment-friendly asphalt improver provided by the invention comprises the following components: 20-65% of a dispersing agent; 15%-40% of an antioxidant; 15-40% of an odor reactant; the odor reactant is prepared from limonene, terpinene, isoterpinene, phellandrene, alpha-terpinene, pinene, rosin carveol, myrtenol, verbenol, citral, citronellal, hydroxycitronellal, phellanaldehyde, perillaldehyde, menthone, carvone, dihydrocarvone, piperonone, camphor, methyl nonyl acetaldehyde, isopentenal, amyl cinnamaldehyde and ethyl cinnamaldehyde; the catalyst is selected from one or more of alpha-hexyl cinnamyl aldehyde, 9-decenal, 2-tridecenal and hexadecenal. The asphalt modifier provided by the invention can obviously improve the aging resistance of asphalt in the mixing and construction processes, and obviously reduces ...

Technological method for treating VOCs (Volatile Organic Chemicals) in standard reaching manner and

The invention relates to a process method for VOCs standard treatment and carbon reduction. Collected waste gas is conveyed to an oil gas recovery facility through an induced draft fan to be pretreated; the concentration of the oil gas pretreated by the oil gas recovery facility is less than 25% LEL; pretreated oil gas is introduced into an inlet of a heating furnace air blower through a conveying fan; pretreated oil gas is introduced into a heating furnace through a heating furnace air blower to be incinerated. According to the technical scheme, an existing heating furnace is fully utilized to replace a traditional waste gas incinerator to co-treat VOCs waste gas, the VOCs waste gas is stably discharged in a standard reaching mode, energy of each C atom is completely absorbed, the maximum resource utilization value of the heating furnace, waste gas recycling and the minimum project investment cost are truly achieved, no newly-added carbon dioxide emission is generated, and the energy-saving ...

Preparation method of butyl rubber with low cyclic oligomer content

The invention provides a preparation method of butyl rubber with low cyclic oligomer content. The preparation method comprises the step of introducing a proton capturing agent in the preparation process. According to the invention, a proton trapping agent, such as one or more of 2, 6-di-tert-butylpyridine, 4-methyl-2, 6-di-tert-butylpyridine, 2, 4, 6-tri-tert-butylpyridine, piperidine, triethylamine, and 4-hydroxy-2, 2, 6, 6-tetramethylpiperidine-1-oxygen free radical, is introduced into a butyl rubber polymerization process. The proton capturing agent can capture free protons in a system and inhibit and eliminate uncontrollable initiation caused by trace free protons possibly existing in the system, so that the content of oligomers initiated by the protons is reduced, and the prepared butyl rubber has lower cyclic oligomer (C13H24 and C21H40) content.

Evaluation method for representing low-temperature performance of waterproof asphalt based on dynamic thermal analysis method

The invention relates to an evaluation method for representing low-temperature performance of waterproof asphalt based on a dynamic thermal analysis method, which comprises the following steps: selecting waterproof asphalt to be detected, and preparing a sample; freezing the prepared sample in a refrigerator until the sample is hardened and is in a non-flowing state; fixing and placing the hardened sample in a clamp groove of a detection instrument by using a clamp; and performing a dynamic thermal analysis test according to the determined test parameters. According to the technical scheme, the dynamic thermal mechanical analyzer is used for testing, the dynamic force is applied to detect the viscoelastic parameter change of the asphalt along with the temperature change, and the glass-transition temperature point is used for reflecting the transition temperature of the asphalt from the glass material to the viscoelastic material, so that the low-temperature performance change trend of the ...

Preparation method of aluminum alkoxide salt

The invention provides a preparation method of alcohol aluminum salt, and relates to the field of synthesis of basic metal organic chemical materials, the method comprises the following steps: step 1, filling an aluminum material into a bed reactor; 2, leaching a bed layer by using a catalyst alcohol solution; 3, supplementing an alcoholic solution for reaction; and 4, collecting and treating a reaction product. According to the method, alcohol and elemental aluminum are used as raw materials and placed in a continuous flow bed reactor, a catalyst is introduced, certain pressure and temperature conditions are started, and the alcohol and the metallic aluminum react to prepare the alcohol aluminum salt product. The method creates a precedent for efficient synthesis of the multi-degree-of-adaptation C2-C6 alcohol aluminum salt, and provides reliable guarantee for industrial production of alkyl aluminum salts with different varieties and different characteristics and application of downstream ...

Waterproof asphalt as well as preparation method and application thereof

The invention provides waterproof asphalt as well as a preparation method and application thereof. The waterproof asphalt comprises aromatic hydrocarbon oil and coal-to-oil asphalt. Wherein the mass ratio of the aromatic hydrocarbon oil to the coal-to-oil asphalt is 1: (0.8-1.5); the softening point of the coal-to-oil asphalt is not less than 80 DEG C and the ash content is not more than 15%. The aromatic hydrocarbon oil which has good compatibility with the coal-to-oil asphalt and has high solubility is used as the blending softening oil, so that the prepared waterproof asphalt has a relatively high softening point and proper needle penetration. When the waterproof asphalt is used for preparing a waterproof coiled material, compared with a waterproof coiled material prepared from asphalt with the same softening point, the waterproof asphalt provided by the invention has the advantages that the low-temperature flexibility limit of the waterproof coiled material can be reduced by 2 DEG C ...

Doughening agent for modified asphalt as well as preparation method and application of ductility agent

The invention relates to a ductility improver for modified asphalt as well as a preparation method and application thereof. The ductility improver for modified asphalt comprises the following components in percentage by mass: 75-96% of waste bio-oil, 3-20% of petroleum resin and 1-5% of dioctyl adipate (DOA). According to the technical scheme, the waste bio-oil contains part of natural antioxidants, two or more kinds of waste bio-oil are adopted, besides enough oxidation resistance is kept, the waste bio-oil, the C5 petroleum resin and the DOA can generate crosslinking reaction, the performance of the ductility increasing agent is improved, the C5 petroleum resin has good anti-aging performance and has good compatibility with SBS and DOA, and the C5 petroleum resin has good anti-aging performance and good compatibility with the SBS and the DOA. The three components have a synergistic effect, so that the compatibility of the matrix asphalt and the modifier is enhanced, the low-temperature ...

Chemically modified anti-aging asphalt and preparation method thereof

The invention provides chemically modified anti-aging asphalt. The chemically modified anti-aging asphalt consists of asphalt and a cerium oxide doped phosphorus pentoxide chemical modifier, the mass percent of each raw material is as follows: 99.1%-99.7% of asphalt; and 0.3%-0.9% of a cerium oxide doped phosphorus pentoxide chemical modifier. Compared with the prior art, the chemically modified anti-aging asphalt provided by the invention adopts specific components with specific contents to realize relatively good overall interaction, and particularly through cerium oxide doping, the surface charge distribution of phosphorus pentoxide is more uniform, the number of active centers of phosphorus pentoxide is increased, and the service life of the asphalt is prolonged. The reaction capacity of phosphorus pentoxide and asphalt is effectively improved, active sites prone to oxidative polycondensation in the asphalt are reduced, the composition structure of the asphalt is improved, the high ...

Heat removal method and heat removal system for reaction of preparing alpha-olefin through selective polymerization of ethylene

The invention provides a heat removal process and a heat removal system for a reaction for preparing alpha-olefin through selective polymerization of ethylene. A process for preparing alpha-olefin through selective polymerization of ethylene has the characteristic of remarkable economic benefit, but the process reaction is a strong exothermic reaction, and effective removal of reaction heat is the key and difficult point of the process. According to the method, ethylene selective polymerization heat is withdrawn by combining low-temperature feeding and gas-phase external circulation of raw materials, ethylene and butane solvents are cooled and uniformly mixed to enter a reaction kettle for reaction, a large amount of butane is entrained by gas-phase external circulation of ethylene, and butane flows back to the reaction kettle for cooling when encountering cold; and meanwhile, the residual gas phase sequentially passes through a recycle gas compressor, a recycle gas cooler and a gas-liquid ...

Preparation method and application of butyl rubber

The invention provides a preparation method of butyl rubber. The preparation method comprises the step of introducing a polarity regulator in the preparation process. According to the synthesis method of the butyl rubber, one or more polarity regulators are introduced, on one hand, the polarity is improved, and the reaction activity of isoprene in the butyl polymerization process is improved; on the other hand, the dispersion state during polymer polymerization is improved, and the industrial problem of caking and hanging of butyl rubber due to temperature rise in the reaction process is solved.

Catalyst system for preparing 1-octene and 1-hexene through alternate continuous reaction of trimerization and tetramerization of ethylene and preparation method

The invention provides a dual-catalyst system for preparing 1-octene and 1-hexene through alternate continuous reaction of trimerization and tetramerization of ethylene and a preparation method of the dual-catalyst system. The preparation raw materials of a catalyst adopted in the tetramerization reaction comprise a PNP ligand, a Cr (III)-containing main catalyst and an Al-containing cocatalyst; the catalyst adopted in the trimerization reaction is prepared from the following raw materials: an N-containing ligand, a Cr (III)-containing main catalyst, an Al-containing cocatalyst and a Cl-containing accelerant. The dual-catalytic reaction system is alternately used for trimerization and tetramerization of ethylene, can realize cleaning of a reaction high polymer at high temperature under the condition of continuous reaction, and prolongs the continuous production period to three times of that of the original process; and the product selectivity is high.

Method for synthesizing aldehydes, alcohols and alkanes through olefin hydroformylation

The invention provides a method for synthesizing aldehydes, alcohols and alkanes through olefin hydroformylation, which comprises the following step of: reacting olefin in CO/H2 under the action of a transition metal cobalt complex, a phosphine ligand and an additive to obtain the product aldehydes, the product alcohols and the product alkanes. According to the synthesis method provided by the invention, the transition metal cobalt complex and the phosphine ligand are used as a catalytic system, and the additive is added to stabilize the reaction system, so that a plurality of high-added-value products are finally synthesized. Results show that the alkane selectivity is 2-21%, the olefin conversion rate is 24-99%, the product aldehyde selectivity is 55-82%, and the product alcohol selectivity is 12-35%; the regioselectivity of the products aldehyde and alcohol is excellent, and straight-chain products are mainly used. Compared with a rhodium catalyst, the strategy is economical and practical ...

Preparation method of 2-substituted-4, 6-dibromophenol

The invention provides a preparation method of 2-substituted-4, 6-dibromophenol, which comprises the following steps: S1) reacting 2-substituted phenol as shown in a formula (I) with N-bromosuccinimide in a polar solvent to obtain a reaction solution; s2) evaporating and concentrating the reaction solution until solids are separated out to obtain a concentrated solution, and then adding a non-polar solvent for crystallizing and removing impurities to obtain a solution; and S3) removing the solvent from the solution to obtain the 2-substituted-4, 6-dibromophenol. Compared with the prior art, the method adopts the mild bromination reagent, the synthesis method is simple to operate, the synthesis condition is mild, the product is easy to separate and purify, the solvent can be recycled, the material consumption and energy consumption are low, the three wastes are few, and the method is green and environment-friendly and is suitable for large-scale industrial production.

Rotary flash drying device and drying heat source supply structure thereof

The invention relates to a rotary flash drying device and a drying heat source supply structure thereof.The drying heat source supply structure comprises a first pipeline, the first end of the first pipeline is connected with an outlet pipeline of a main fan of a catalytic cracking device, and the second end of the first pipeline is connected with an inlet pipeline of a drying chamber of the rotary flash drying device; the first pipeline is sequentially provided with a leading-out valve, an emergency cut-off valve and an air volume adjusting valve in the direction from the first end to the second end, the first pipeline is provided with a flow detection device and a temperature detection device, the leading-out valve is used for controlling connection and disconnection of the first pipeline, and the emergency cut-off valve is used for cutting off the first pipeline when the flow value detected by the flow detection device is lower than a preset flow value. The air volume adjusting valve ...

Large-particle-size high-solid-content latex and preparation method thereof

The invention provides latex with large particle size and high solid content and a preparation method thereof, and the preparation method comprises the following steps: A) mixing a non-polar group solvent and a polar group solvent to obtain a swelling agent; b) under a stirring condition, mixing a swelling agent with latex, heating to 35-75 DEG C, adding nitrogen, pressurizing to 0.5-0.8 Mpa, strongly mixing for 0.2-1 hour, relieving pressure, cooling to 15-35 DEG C, then adding a coalescence agent and a stabilizer, stirring, and adjusting the pH value to 8-11; c) mixing the latex with a defoaming agent, and carrying out vacuum flash evaporation to remove a solvent; and D) concentrating and dehydrating the latex until the solid content is 65-70% to obtain the latex with large particle size and high solid content. According to the rubber swelling principle, the polar group or non-polar group solvent has selectivity on rubber swelling and presents different swelling ratios, the swelling problem ...

Preparation method and application of light hydrocarbon cracking catalyst

The invention provides a preparation method and application of a light hydrocarbon cracking catalyst, and the preparation method comprises the following steps: uniformly mixing deoxidized ionized water, a ZSM-5 molecular sieve with a low silica-alumina ratio and a ZSM-5 molecular sieve with a high silica-alumina ratio to obtain slurry A; mixing deoxidized ionized water, kaolin and aluminum sol, and adding the mixture into the slurry A to obtain slurry B; uniformly mixing the slurry B and pseudo-boehmite to obtain slurry C; acidifying the slurry C to obtain slurry D; mixing the slurry D with a phosphorus precursor to obtain slurry E; the slurry E is subjected to ball milling and granulation, and microsphere particles are obtained; and drying and burning the microsphere particles to obtain the light hydrocarbon cracking catalyst. The compound of the ZSM-5 molecular sieve with the low silica-alumina ratio and the ZSM-5 molecular sieve with the high silica-alumina ratio is adopted, so that ...

Method for reducing emission of NOx in catalytic cracking/cracking regeneration flue gas

The invention relates to a method for reducing emission of NOx in catalytic cracking/cracking regeneration flue gas, which comprises the following steps: dividing a spent catalyst into two parts, enabling the first part of spent catalyst and air to enter a reducing gas generator together to complete partial scorching, and conveying the first part of spent catalyst and CO-rich flue gas into a fluidized bed regenerator; the second part of the spent catalyst is directly added into the fluidized bed regenerator to be mixed with the partially scorched first part of the spent catalyst for regeneration, generated regeneration flue gas containing NOx and flue gas rich in CO are subjected to an oxidation-reduction reaction, CO is oxidized into CO2, and meanwhile NOx is reduced into N2. According to the technical scheme, the problem that an existing regenerator is low in NOx removal efficiency can be solved, the concentration of NOx in catalytic cracking regeneration flue gas can be reduced to 20 ...

Deep high ground stress roadway full-length anchoring pressure relief support cooperative control method and structure

The invention discloses a deep high ground stress roadway full-length anchoring pressure relief support cooperative control method and structure, and the method comprises the following steps: S1, drilling small hole pressure relief hole groups: drilling a plurality of small hole pressure relief hole groups in surrounding rocks at different positions of a roadway at intervals, each small hole pressure relief hole group is located in the range from shoulder nests to the side angles on the two sides of the roadway and distributed in a fan shape. S2, reaming sections are drilled, specifically, the reaming sections are drilled on single holes of each small hole pressure relief hole group, and the reaming sections are located in a surrounding rock high-stress area; s3, a grouting system and an anchor cable are installed, specifically, the grouting system and the anchor cable are installed in a single hole of each small hole pressure relief hole group; s4, hole sealing is conducted, specifically ...

Method for preparing carboxylic acid from isoamylene

The invention provides a method for preparing carboxylic acid from isoamylene, which comprises the following steps: isoamylene and water are subjected to hydrocarboxylation reaction in CO under the action of a catalyst to obtain carboxylic acid, and the catalyst is selected from acid or a combination of acid, a transition metal palladium complex and an organic phosphine ligand. In the process of preparing carboxylic acid from isoamylene, under the condition of acid catalysis, the conversion rate of isoamylene is 90-99%, and the selectivity of the product 2, 2-dimethylbutyric acid is 73-95%; under the catalysis condition of acid/palladium/organic phosphine ligand, the conversion rate of isopentene is 32-99%, and the selectivity of the product 3-methylvaleric acid is 25-95%. Compared with the existing reported multi-step synthesis method, the method has the advantages that the required high-added-value chemicals can be obtained by a one-step method; the separation and purification steps are ...

Modified polyolefin and preparation method thereof

The invention belongs to the field of high polymer materials, and particularly relates to modified polyolefin and a preparation method thereof. The preparation method provided by the invention comprises the following steps: mixing polyolefin, functional molecules, an initiator and a solvent, carrying out a reaction under pressurization and heating conditions, and after the reaction is carried out for a period of time, carrying out pressure relief and flash evaporation; and after one or more cycles of pressurizing and heating reaction and pressure relief flash evaporation are completed, the modified polyolefin is obtained. According to the preparation method provided by the invention, system concentration is carried out through a flash evaporation process, so that the reaction rate is accelerated; meanwhile, flashed fractions can be used as solvents repeatedly, so that the problem that the solvents are difficult to recycle is solved; in addition, the modification reaction process of the ...

Super-roundness alumina microsphere and preparation method thereof

The invention discloses a super-roundness alumina microsphere and a preparation method thereof.The method comprises the steps that pseudo-boehmite, alumina powder, water and peptizing auxiliaries are heated and stirred to be uniform, and pseudo-boehmite turbid liquid is obtained; adding a peptizing agent into the pseudo-boehmite suspension and uniformly stirring to obtain an aluminum oxide suspension; adding a solution containing a gelling agent into the aluminum oxide suspension, uniformly mixing, dropwise adding a hot oil column for forming, collecting obtained aluminum oxide balls, and curing, washing, drying and roasting the aluminum oxide balls to obtain the aluminum oxide microspheres, according to the method, by adjusting the preparation process of the alumina slurry and improving the hot oil column forming process, the physical characteristics of the obtained alumina microspheres can be effectively controlled, the overall pelletizing rate is high, and conditions are provided for ...

Coating material of waterproof coiled material, preparation method and application

The invention provides a coating material of a waterproof coiled material as well as a preparation method and application thereof. The coating material of the waterproof coiled material is prepared from the following components in parts by weight: 62-66 parts of special asphalt, 3-5 parts of SBS (Styrene Butadiene Styrene), 4-7 parts of SBR (Styrene Butadiene Rubber), 0.2-0.35 part of functional additive and 20.65-26.8 parts of inorganic filler, and the special asphalt is petroleum asphalt produced by adopting a distillation process of naphthenic base crude oil and paraffin base crude oil. Compared with the prior art, the technical scheme uses special asphalt, particularly naphthenic crude oil and paraffin-based crude oil are used according to a specific proportion and are subjected to atmospheric distillation, so that the softening point and the penetration degree of the asphalt obtained within the temperature range are better than those of the asphalt obtained only by adopting the naphthenic ...

High-efficiency catalyst ligand for selective trimerization of ethylene, and preparation method, catalyst system and application thereof

The invention provides a catalyst ligand for preparing 1-hexene through ethylene trimerization. The catalyst ligand contains a chlorine tripyrrole functional group; the catalyst ligand has a structural formula as shown in a formula A and/or a formula B. The chlorine-containing tripyrrole ligand compound provided by the invention not only has the function of a ligand, but also has the function of an accelerant. A trimerization catalytic system is improved based on the ligand, and an original four-component system of a main catalyst, an auxiliary catalyst, the ligand and an accelerant is simplified into a three-component system, so that the preparation of the catalytic system is simpler and more convenient, and meanwhile, the catalytic activity of trimerization is also remarkably improved and can reach 760kg/g (Cr). H to the maximum. Due to high activity and high selectivity of the catalytic system at high temperature, the reaction can be operated for a long period, and the catalyst has obvious ...

Preparation method of alpha, beta-unsaturated carboxylic ester

The invention relates to the technical field of organic synthesis, in particular to a preparation method of alpha, beta-unsaturated carboxylic ester, which comprises the following steps: under the condition of carbon monoxide, mixing a ruthenium catalyst, an organic nitrogen ligand, a 1, 2-propadiene compound and an alcohol compound, and reacting to obtain the alpha, beta-unsaturated carboxylic ester. According to the method, the alpha, beta-unsaturated carboxylic ester is efficiently prepared through the hydrogen esterification reaction of the 1, 2-propadiene compound, the target product can be efficiently and highly selectively synthesized through the regulation and control effect of the organic nitrogen ligand on the ruthenium catalyst, and the method has a good industrialization prospect; meanwhile, in the preparation method provided by the invention, reaction conditions are relatively mild, excellent conversion of the substrate can be realized at a relatively low reaction temperature ...

Method for flexibly producing cyclopentanone and cyclopentanol

The invention provides a method for co-producing cyclopentanone and cyclopentanol by selective oxidation of cyclopentane, which adopts a titanium silicalite molecular sieve as a catalyst and hydrogen peroxide as an oxidant, realizes co-production of cyclopentanone and cyclopentanol by a one-step method at 70-100 DEG C, and can realize regulation and control of a ketone-alcohol molar ratio from 5: 1 to 16: 1 by adjusting process parameters. A production enterprise can adjust the product proportion in time according to the market condition of the product, and the anti-risk ability of the enterprise to deal with market fluctuation is improved.

Stirring paddle and stirring kettle

The invention discloses a stirring paddle which is arranged in a stirring kettle and comprises a stirring paddle body, a stirring shaft and a filter screen, the stirring paddle body is connected with the stirring shaft, the filter screen is arranged at the top of the stirring shaft and is perpendicular to the stirring shaft, and the stirring paddle body and the filter screen rotate along with the stirring shaft. During use, the stirring shaft drives the stirring paddle body and the filter screen to rotate, airflow is generated in the stirring kettle and carries a large amount of powder, the powder in the airflow is filtered by the filter screen arranged at the top of the stirring shaft and stays in the stirring kettle, and then the airflow enters the air outlet pipeline of the stirring kettle and enters downstream equipment (a buffer tank) through the air outlet pipeline. As the sectional area of the stirring kettle is large, the area of the filter screen is correspondingly enlarged, the ...