Cyanine dye having azulene structure and preparation method thereof

The invention relates to a cyanine dye having an azulene structure, which has a molecular structure represented by a general formula below. The method for preparing the cyanine dye comprises the following steps: taking 1,3-dimethyl acyl azulene derivant and 1-alkyl-2,3,3-trimethyl indole salt as raw materials; performing condensation reaction in an inert solvent under the action of a condensing agent; and performing purification to obtain an objective product. The cyanine dye having the azulene structure has high purity, high yield, easy purification, large molar extinction coefficient and high solubility in organic solvents, is suitable for sensitive materials, CD recording media, infrared laser dyes and optical nonlinear materials, and is used for the fields of biomedicine and the like.

Composite weathering-resistant optical cable hanging board

The invention discloses a composite weathering-resistant optical cable hang plate, which comprises a hang plate main body comprising a protective shell and an information plate, and the information plate is arranged in the protective shell; the fixing assembly is arranged on the back face of the hang tag body and comprises an adjusting piece and a rotary fixing piece, the adjusting piece is fixedly connected with the protective shell, and the rotary fixing piece is rotationally connected with the adjusting piece. The service life of the optical cable hangtag can be prolonged through the protective shell, the information board in the optical cable hangtag is well protected, the optical cable hangtag is prevented from being damaged in the long-term use process, information replacement of the information board and fixation of the optical cable hangtag can be achieved through the fixing assembly, and convenience and high efficiency are achieved.

Underground carbonized cementing material filling method and filling system

The invention discloses an underground carbonized cementing material filling method and system, a cementing material comprises a filling aggregate and a cementing material, and the method comprises the following steps: selecting the filling aggregate and the cementing material; determining matching parameters of the filling aggregate and the cementing material; constructing an underground filling station in the underground chamber, wherein the underground filling station comprises a slurry preparation system and a carbonized filling slurry transportation system; filling aggregate and a cementing material are conveyed to the slurry preparation system, the cementing material is prepared into cementing slurry, and underground dirty air containing CO2 is injected into the slurry preparation system through a pipeline by using a fan; the slurry preparation system is used for mixing and stirring the contained materials to prepare carbonized filling slurry; and conveying the prepared carbonized ...

Stair-climbing excising device

The invention belongs to the field of fitness equipment and particularly relates to a stair-climbing excising device. The device comprises a frame body and a pedal device arranged on the frame body. The frame body comprises a bottom frame and an upper support connected with the bottom frame, and a fixed pedal is arranged on the bottom frame. The stair-climbing excising device is simple in structure, small in size and occupied space and very suitable for families or offices. When being tired in working or after getting home, people squeeze time for excising by themselves or excising with family members, which is beneficial for good health and family harmony. The left side and the right side of a rotating shaft are respectively provided with six pedal plates, in total, twelve pedal plates are arranged in the circumferential direction of the rotating shaft, and therefore the left foot and the right foot tread the pedal plates respectively to achieve stair-climbing motion. For different people ...

Mixed-type ionic liquid electrolyte as well as preparation method and application thereof

The invention discloses a mixed-type ionic liquid electrolyte as well as a preparation method and application thereof. The mixed-type ionic liquid electrolyte is prepared by mixing hydrophobic ionic liquid 1-methyl-3-butylimidazolium hexafluorophosphate [BmimPF6] with solid organic electrolyte salt spirocyclic quaternary ammonium tetrafluoroborate (C8H16NBF4) according to the mol ratio of 9:1, 8:2, 7:3, 6:4 or 5:5 and has the advantages of broad electrochemical window, higher electrical conductivity, smaller internal resistance, high cycle efficiency and the like, the hydrophobic performance is excellent, and the performance is outstanding particularly when the proportion is 6:4. The electrolyte disclosed by the invention overcomes the defects of traditional organic electrolytes and othersolid electrolytes in application from composition and is an electrolyte which has great development potential and is applicable to super capacitors.

Preparation method of fluorine-containing polymer porous nano-micron fibre electrode diaphragm

The invention relates to a preparation method of a fluorine-containing polymer porous nano-micron fibre electrode diaphragm. The preparation method comprises the following steps: dissolving a fluorine-containing polymer and soluble metal salt in an organic solvent to prepare a spinning precursor, then, preparing a fluorine-containing polymer-metal salt electrostatic spinning fibrous membrane through high-pressure electrostatic spinning, adding a mineralizing agent to carry out hydrothermal reaction so as to obtain a fluorine-containing polymer-metal oxide nano-micron fibrous membrane, carrying out acid treatment by using dilute acid aqueous solution to convert metal oxide nanoparticles in the fluorine-containing polymer-metal oxide nano-micron fibrous membrane into soluble metal salt which is dissolved in inorganic acid aqueous solution, thus obtaining the fluorine-containing polymer porous nano-micron fibre electrode diaphragm. The preparation method disclosed by the invention has the ...

Pitch-adjustable double-staple stapler clamping body

The invention discloses a pitch-adjustable double-staple stapler clamping body. The stapler clamping body comprises a base (1), a stapling paper bottom plate (4), two pairs of stapler clamping bodies (6), and stapler pitch adjusting clamps arranged on the stapler clamping bodies (6), wherein pitch clamping slots (5) matched with the stapler pitch adjusting clamps are arranged on the base (1); the stapler pitch adjusting clamps can be moved in the clamping slots (5). When the clamping body is in use, two staplers are respectively arranged on the stapler clamping bodies (6) to ensure that the two staplers are parallel and level to each other, paper needed to be printed are put flat and are stapled by the two staplers respectively, the distance of two staples knocked in the papers by the two staplers can keep uniform and the two staples are in a same straight line.

Water-soluble cyanine dye containing azulene structure and synthetic method thereof

The invention relates to a water-soluble cyanine dye containing an azulene structure, of which a molecular structure has the general formula as follows: in preparation, 1,3-dimethyl azulene derivatives are condensed with substituted 1-alkyl-2,3,3-trimethylindole salt under the action of a condensing agent, the cyanine dye containing the azulene structure can be obtained from the reaction mixture and the objective product is obtained through purification. As the dye contains the azulene structure and water-soluble groups of a sulfonic acid group and a carboxyl group, the photostability is increased, the fluorescent property is improved, and the cyanine dye can be applied in the fields of laser protection, fluorescence labeling and photoelectric functional materials.

Method for preparing 4,5,6,7-tetrahydro-1H-benzimidazo-5-methanoic acid derivatives

The invention belongs to the field of Ramosetron intermediate synthesizing methods, and in particular relates to a method for preparing 4,5,6,7-tetrahydro-1H-benzimidazo-5-methanoic acid derivatives. The method is implemented according to the following steps that: (1) 4-oxocyclohexanecarboxylate and halogen reagent carry out a halogenating reaction in an inertia solvent; and (2) a halogen product obtained from the step (1) and formamidine or salt thereof carry out a condensation reaction in the presence of alkali. The method also can perform a hydrolysis reaction under an acid condition after the condensation reaction of the step (2). In the method, the inertia solvent in the halogenating reaction in the step (1) can be one or mixture of two of tetrahydrofuran, acetonitrile, methylene dichloride, trichloromethane, carbon tetrachloride, 1,2-dichloroethane, benzene and toluene; and the halogen reagent in the halogenating reaction in the step (1) can be iodine, bromo-succinimide, bromine or ...

Preparation method of (2R, 4R)-4-pipecolines-2-ethyl formate compound

The invention relates to a method for preparing (2R, 4R)-4-pipecolines-2-ethyl formate by using 4-methly tetrahydropyridine-2-ethyl formate as a starting material. The synthesis method comprises the following steps: 1) catalytically hydrogenating 4-methyl (1-methylic benzyl) tetrahydropyridine-2-ethyl formate under the effect of a rhodium catalyst to obtain 4-methyl (1-methylic benzyl) piperidine-2-ethyl formate; 2) removing benzyl through a palladium catalyst to obtain 4-pipecolines-2-ethyl formate; and 3) rectifying, separating and purifying to obtain the synthesized (2R, 4R)-4-pipecolines-2-ethyl formate. The preparation method has the advantages that the reaction conditions are easily controlled, the cost is low, the yield is high, the operation process is simple and convenient, and the mass production can be carried out conveniently.

1,4-dihydropyridines compound containing azulene structure and preparation method thereof

The invention belongs to the field of 1,4-dihydropyridines compounds, in particular relates to a 1,4-dihydropyridines compound containing an azulene structure and a preparation method thereof. The 1,4-dihydropyridines compound containing an azulene structure has the following structure formula. The preparation method comprises the following steps of: carrying out a condensation reaction by using 1-formyl azulene derivative, acetyl acetate and ammonium acetate or 3-amino-2-butene ester as raw materials under the action of an acid catalyst; and purifying to obtain a target product. The preparation method is simple and rapid, can be used for synthesizing a great amount of compound libraries in a short time, thereby being suitable for researching the molecular diversity of compounds.

Method for determining minimum width of staged open stope subsequent filling stope

The invention discloses a method for determining the minimum width of a staged open-stope subsequent filling stope, and provides a scheme capable of determining the minimum value of the width of the stope, so that the problem that a scheme for determining the minimum value of the width of the stope is lacked at present is solved. According to the method, the problems that an existing stope width determining method only gives the maximum allowable width of the stope, but does not fully consider the damage of the approach eyebrow line and the difficulty in construction of the filling retaining wall due to the fact that the width of the stope is too small in the actual operation process are solved. On the basis of comprehensively considering factors such as on-site actual ore removal operation, filling retaining wall construction and bottom structure arrangement, the method for determining the minimum width of the stope is provided, so that engineering constraint is provided for determining ...

Synthesis technology of 1,3-dimethyl-2-chloroimidazoline chloride

Fuel gas generating agent and preparation method thereof

The invention relates to a fuel gas generating agent and a preparation method thereof. The fuel gas generating agent comprises 15%-30% of an adhesive, 1%-15% of a plasticizer, 60%-80% of an oxidizing agent and 1%-8% of a curing agent. Wherein the oxidizing agent is a perchlorate-based molecular perovskite energetic material, preferably, the oxidizing agent is one or a combination of two of (C6H14N2) [NH4 (ClO4) 3] (DAP-4) and (C4H12N2) [NH4 (ClO4) 3] (PAP-4). The fuel gas generating agent prepared by the invention does not contain metal powder in the formula, has the characteristics of small fuel gas molecular weight, high gas production rate, clean combustion product and low solid residue content, is widely applicable to adhesive systems, has the characteristics that the performances such as combustion rate, combustion temperature and gas production rate are easy to adjust, and is particularly suitable for special fuel gas generators with higher requirements on gas production rate.

Synthesis process of 2,4,6-trimethyl benzoic acid

Method for preparing 4,5,6,7-tetrahydro-1H-benzimidazo-5-methanoic acid derivatives

The invention belongs to the field of Ramosetron intermediate synthesizing methods, and in particular relates to a method for preparing 4,5,6,7-tetrahydro-1H-benzimidazo-5-methanoic acid derivatives. The method is implemented according to the following steps that: (1) 4-oxocyclohexanecarboxylate and halogen reagent carry out a halogenating reaction in an inertia solvent; and (2) a halogen productobtained from the step (1) and formamidine or salt thereof carry out a condensation reaction in the presence of alkali. The method also can perform a hydrolysis reaction under an acid condition afterthe condensation reaction of the step (2). In the method, the inertia solvent in the halogenating reaction in the step (1) can be one or mixture of two of tetrahydrofuran, acetonitrile, methylene dichloride, trichloromethane, carbon tetrachloride, 1,2-dichloroethane, benzene and toluene; and the halogen reagent in the halogenating reaction in the step (1) can be iodine, bromo-succinimide, bromineor bromine ...

Filling material conveying device for mining filling

The invention discloses a filling material transportation device for mining filling, which comprises a box trolley device for containing filling materials, a discharging device for pushing the filling materials to move and discharge the filling materials is arranged at the bottom of the box trolley device, and an extending device which is rotationally arranged at the bottom of the box trolley device and is used for extending and conveying the filling materials to discharge the filling materials is also arranged at the bottom of the box trolley device. Two adjusting devices used for collecting, releasing, pulling and adjusting the discharging position of the filling materials are symmetrically arranged on the front portion and the rear portion of the box trolley device. The extending device comprises a hanging box, two hanging rings are symmetrically arranged at one end of the top of the hanging box, a third motor is installed in front of the hanging box, a conveying belt is arranged in ...

Mining grouting filling dehydration device and method

The mining grouting filling dehydration device comprises a shell, a partition plate is arranged in the middle of the interior of the shell, hydraulic rods are symmetrically arranged at the four corners of the lower end of the partition plate, and sliding assemblies are fixedly connected to the ends, away from the partition plate, of the hydraulic rods and are in sliding fit with guiding assemblies; the guide assembly is fixedly arranged at the end of the dewatering assembly. According to the mining grouting filling dehydration device and method, through cross rotation of the first splicing plate and the second splicing plate, adhesion blocks attached to the lower surfaces of the first splicing plate and the second splicing plate are stressed to be separated; and in addition, through cross rotation of the first splicing plate and the second splicing plate, large adhesion blocks can be prevented from being formed below the first splicing plate and the second splicing plate, compared with ...

Method for preparing symmetrical N,N'-1-4-dialkyl triethylene diammonium tetrafluoroborate

The invention provides a method for preparing symmetric N, N'-1, 4-dialkyl triethyl diammonium tetrafluoroborate. The invention is characterized in that the method comprises the following steps of: (1) preparing symmetric N, N'-1, 4-dialkyl triethyl diammonium halogeno salt from triethylene diamine and halogenated hydrocarbon into; (2) preparing a crude product of the symmetric N, N'-1, 4-dialkyltriethyl diammonium tetrafluoroborate through adding the prepared symmetric N, N'-1, 4-dialkyl triethyl diammonium halogeno salt into a tetrafluoroborate aqueous solution; (3) dissolving the preparedcrude product of the symmetric N, N'-1, 4-dialkyl triethyl diammonium tetrafluoroborate into solvent and adding a decoloring agent into the solvent, and heating the mixed solvent to reflux to producea finished product of the symmetric N, N'-1, 4-dialkyl triethyl diammonium tetrafluoroborate. The target product has good selectivity, high yield, shortened reaction time and purity which can meet the requirement ...

Synthetic method of ramosetron

The invention belongs to the field of preparation methods of 1, 2-bisaryl tetrahydrobenzimidazoles, in particular to a method for synchronizing ramosetron of 5-HT3 receptor antagonist, which comprises the following steps: condensing N-scatol and (R)-4, 5, 6, 7-tetrahydrochysene-1H-benzoglioxaline-5-methanoic acid in laten solvent under the condition of existing trifluoroacetic anhydride (F2CO)2O and polyphosphoric acid (PPA), and then preparing the ramosetron; the mol ratio of the N-scatol, the (R)-4, 5, 6, 7-tetrahydrochysene-1H-benzoglioxaline-5-methanoic acid and the trifluoroacetic anhydride is 1:1-4:1-4; and the mol ratio of the N-scatol, the (R)-4, 5, 6, 7-tetrahydrochysene-1H-benzoglioxaline-5-methanoic acid and the trifluoroacetic anhydride is 1:1-2:1-2. The invention has high yield, safety, and simple and convenient operation and can meet the requirement of massive production.

Method for synthesizing antioxidant 1,3,5-trimethyl-2,4,6-tri(3,5-di-tert-butyl-4-hydroxybenzyl)benzene

The invention discloses a method for preparing antioxidant 1,3,5-trimethyl-2,4,6-tri(3,5-di-tert-butyl-4-hydroxybenzyl)benzene by using solid superacid as catalyst, wherein 1,3,5-trihalo methyl-2,4,6-trimethyl benzene and 2,6-do-tert-butylphenol, as raw materials, are subject to alkylation in inert solvent under the action of solid superacid-type catalyst SO42-/MXOY, so as to prepare target products. The method simplifies operating process, achieves mild reaction conditions, has the characteristics of easy separation of products, good reusability of the catalyst, small environmental pollutionand the like, and is suitable for industrial production.

Triarylmethane compound containing azulene-type structure and preparation method thereof

The invention discloses a triarylmethane compound containing an azulene-type structure and a preparation method thereof. The triarylmethane compound has a structural general formula as shown in the specification. The method is characterized in that 2-azulene hydroxyl-1-ethyl formate and aromatic aldehyde are adopted as reaction raw materials and have condensation reaction under the effect of a catalyst, and a reaction product is purified to obtain a target product. The triarylmethane compound containing the azulene-type structure is easy to derivate, has multiple reaction points, is suitable for the molecule diversity research and can be selectively synthesized into a polycyclic compound.

Method for preparing antisymmetric N,N'-1-4-dialkyl triethylene diammonium tetrafluoroborate

The invention relates to a method for preparing asymmetric N, N'-1, 4-dialkyl triethylene diammonium tetrafluoroborate, which is characterized by comprising the following steps that: (1) first halogenated hydrocarbon is added in drops to mixed solution of triethylene diammonium and solvent, so as to prepare mono-substituted N-1-alkyl triethylene diammonium halogeno salt; (2) the mono-substituted N-1-alkyl triethylene diammonium halogeno salt and second halogenated hydrocarbon are added to deionized water, so as to prepare bis-substituted N, N'-1, 4- dialkyl triethylene diammonium halogeno salt; (3) the bis-substituted N, N'-1, 4- dialkyl triethylene diammonium halogeno salt is added to tetrafluoro boric acid aqueous solution, so as to prepare a crude product of asymmetric N, N'-1, 4-dialkyl triethylene diammonium tetrafluoroboratel; (4) the crude product of asymmetric N, N'-1, 4-dialkyl triethylene diammonium tetrafluoroboratel is dissolved through solvent and has decoloring agent added ...

Mixed-type ionic liquid electrolyte as well as preparation method and application thereof

The invention discloses a mixed-type ionic liquid electrolyte as well as a preparation method and application thereof. The mixed-type ionic liquid electrolyte is prepared by mixing hydrophobic ionic liquid 1-methyl-3-butylimidazolium hexafluorophosphate [BmimPF6] with solid organic electrolyte salt spirocyclic quaternary ammonium tetrafluoroborate (C8H16NBF4) according to the mol ratio of 9:1, 8:2, 7:3, 6:4 or 5:5 and has the advantages of broad electrochemical window, higher electrical conductivity, smaller internal resistance, high cycle efficiency and the like, the hydrophobic performance is excellent, and the performance is outstanding particularly when the proportion is 6:4. The electrolyte disclosed by the invention overcomes the defects of traditional organic electrolytes and other solid electrolytes in application from composition and is an electrolyte which has great development potential and is applicable to super capacitors.

Recovering method of hydrogenation catalyst nickel in nafronyl oxalate

A process for reclaiming the hydrogenating catalyst (Raney nickel) in naphthylamine-ester-oxalate includes mixing the used Raney nickel with the 5-15 % concentration aqueous solution of potassium (orsodium) hydroxide while introducing hydrogen gas under 2-3 atm. reaction at 50-80 deg.c for 0.5-2 hr, and washing with water or absolute alcohol until its pH value=7-8. Its advantages are high reclaiming effect and productivity, and low cost.

Preparation method of spiro quaternary ammonium salt for organic electrolyte of super capacitor

The invention discloses a preparation method of a spiro quaternary ammonium salt for an organic electrolyte of a super capacitor, which comprises the following steps: by using water as a reaction medium, enabling cyclic diamine and diol disulfonate to be subjected to condensation reaction at a certain temperature to obtain a corresponding spiro quaternary ammonium salt; carrying out ion exchange on the ammonium salt to obtain a corresponding spiro quaternary ammonium salt; and finally, purifying to obtain the target product. The method disclosed by the invention has good selectivity, increases the yield of the target product, improves the quality, and can lower the impurity content in the electrolyte to 5 ppm or below, thereby meeting the requirements of the organic electrolyte of a supercapacitor.

Screw sleeve part inner hole processing lathe clamp

The invention discloses a screw sleeve part inner hole processing lathe clamp, which comprises a clamp body, a screw nut, a cone sleeve and a reset spring, wherein a clamp body positioned by a notch is arranged on a lathe main shaft through a transition disc, the front end of the clamp body is a barrel-shaped thin wall with the external taper, in addition, the outer diameter of the back end of the thin wall is greater than the outer diameter of the front end, the inner diameter of the thin wall is matched with the outer diameter of a screw sleeve to be processed, the cone sleeve with the internal taper matched with the external taper of the thin wall is arranged on the outer side of the thin wall in a sleeving way, the reset spring is arranged at the thin wall part in a sleeving way and is positioned between a cone sleeve and a threaded step positioned at the back part of the clamp body, and the screw nut passes through the thin wall and the cone sleeve and is connected with the clamp body ...

Method for synthesizing methyl azulenoids

Method for preparing loading type ferric oxide catalyst

Method for preparing symmetrical N,Ní»-1-4-dialkyl triethylene diammonium tetrafluoroborate

The invention provides a method for preparing symmetric N, N'-1, 4-dialkyl triethyl diammonium tetrafluoroborate. The invention is characterized in that the method comprises the following steps of: (1) preparing symmetric N, N'-1, 4-dialkyl triethyl diammonium halogeno salt from triethylene diamine and halogenated hydrocarbon into; (2) preparing a crude product of the symmetric N, N'-1, 4-dialkyl triethyl diammonium tetrafluoroborate through adding the prepared symmetric N, N'-1, 4-dialkyl triethyl diammonium halogeno salt into a tetrafluoroborate aqueous solution; (3) dissolving the prepared crude product of the symmetric N, N'-1, 4-dialkyl triethyl diammonium tetrafluoroborate into solvent and adding a decoloring agent into the solvent, and heating the mixed solvent to reflux to produce a finished product of the symmetric N, N'-1, 4-dialkyl triethyl diammonium tetrafluoroborate. The target product has good selectivity, high yield, shortened reaction time and purity which can meet the ...

Method for preparing organic electrolyte oxaspiro quatemary ammonium salt of super capacitor

The invention discloses a method for preparing the organic electrolyte oxaspiro quatemary ammonium salt of a super capacitor, which is implemented by the following steps of: performing condensation reaction on cyclic diamine and oxa alkyl dihalide or oxa glycol disulfonate ester at a certain temperature to obtain a corresponding spiro quatemary ammonium salt; performing ion exchange on the spiro quatemary ammonium salt to obtain the corresponding spiro quatemary ammonium salt; and finally purifying the spiro quatemary ammonium salt to obtain a target product. The method ensures high selectivity, high target product yield and impurity content of the electrolyte of less than 5ppm, and can meet the requirements of the organic electrolyte of the super capacitor.

Method for synthesizing 2,4,6-pseudocuminol

The invention discloses a method for synthesizing 2,4,6-trimethylphenol. The method comprises the following steps that: A) a molecular sieve is taken as a catalyst, and an aqueous solution of halogenated acetic acid containing mesitylene and hydrogen peroxide at a volume concentration of 30 percent react under the action of the molecular sieve, are heated and refluxed; B) a product of a step A) is cooled to room temperature and added with water; C) a solvent is adopted for extraction, separation and washing, and then is recovered; and D) reduced-pressure distillation is carried out, so a final product is obtained, wherein the amount ratio in percentage by mass of the molecular sieve to the mesitylene is 1:0.1-1, and the molar ratio of the mesitylene to the halogenated acetic acid to the hydrogen peroxide at a volume concentration of 30 percent is 1:1-8:1-20. The method has the advantages of simple operation, good selectivity, high yield and suitability for scale production.

Preparation technology of zafirlukast intermediate

The invention belongs to the field of production of fine chemical products and particularly relates to a preparation technology of an asthma medicine zafirlukast intermediate. 1-methyl-5-nitroindole and 3-methoxy-4-formylbenzoic acid are adopted as raw materials which react in an inert solvent under the effect of a hydrogen transfer reducing agent 2,6-dimethyl-1,4-dihydropyridine-3,5-diformate and protonic acid to obtain the target product zafirlukast intermediate, wherein the protonic acid is sulfamic acid, p-methylbenzene sulfonic acid, methanesulfonic acid, proline or boric acid. The preparation technology provided by the invention is easy to operate, realizes high product purity and good yield and can meet the requirements of large-scale production and medical products.

Method for preparing 2-methylindoline

The invention belongs to a chemical field and particularly relates to a method for preparing 2-methylindoline, which synthesizes the 2-methylindoline by catalytic hydrogenation of 2-methylindole in acidic ionic liquid, wherein the acidic ionic liquid is ionic liquid of quaternary ammonium salts with a structure shown below; and in the structure, R1, R2 and R3 are alkyl or oxyalkyl, X is hydrogen sulfate, dihydrogen phosphate or benzene sulfonate, and n is equal to 2, 3 or 4. In the invention, the reaction conditions are easy to control, the raw material source is rich, the selectivity is high, the yield is high, the environmental protection effect is remarkable, the operation process is simple and convenient, and requirements of scale production can be met.

Process of preparing troipisetron

Method for synthesizing 2,4,6-pseudocuminol

The invention discloses a method for synthesizing 2,4,6-trimethylphenol. The method comprises the following steps that: A) a molecular sieve is taken as a catalyst, and an aqueous solution of halogenated acetic acid containing mesitylene and hydrogen peroxide at a volume concentration of 30 percent react under the action of the molecular sieve, are heated and refluxed; B) a product of a step A) is cooled to room temperature and added with water; C) a solvent is adopted for extraction, separation and washing, and then is recovered; and D) reduced-pressure distillation is carried out, so a final product is obtained, wherein the amount ratio in percentage by mass of the molecular sieve to the mesitylene is 1:0.1-1, and the molar ratio of the mesitylene to the halogenated acetic acid to the hydrogen peroxide at a volume concentration of 30 percent is 1:1-8:1-20. The method has the advantages of simple operation, good selectivity, high yield and suitability for scale production.

Method for preparing polyimide porous nanofiber electrode diaphragm

The invention discloses a method for preparing a polyimide porous nanofiber electrode diaphragm. The method comprises the following steps: carrying out condensation reaction by adopting binary organic amine and binary organic acid anhydride in an organic solvent, thereby obtaining a polyamide acid solution; adding a soluble metal salt to prepare a spinning precursor, preparing a polyamide acid-metal salt electrostatic spinning fiber diaphragm by virtue of high-voltage electrostatic spinning, and performing thermal imidization treatment, thereby obtaining a polyimide-metallic oxide fiber composite diaphragm; and dissolving the composite diaphragm in an inorganic acid aqueous solution for performing acid treatment, so that metallic oxide nanoparticles are converted into soluble metal salts so as to be dissolved in the inorganic acid aqueous solution so as to obtain the polyimide nano/micron porous fiber diaphragm. The method has the advantages that according to the polyimide nano/micron porous ...

Method for preparing antisymmetric N,Ní»-1-4-dialkyl triethylene diammonium tetrafluoroborate

The invention relates to a method for preparing asymmetric N, N'-1, 4-dialkyl triethylene diammonium tetrafluoroborate, which is characterized by comprising the following steps that: (1) first halogenated hydrocarbon is added in drops to mixed solution of triethylene diammonium and solvent, so as to prepare mono-substituted N-1-alkyl triethylene diammonium halogeno salt; (2) the mono-substituted N-1-alkyl triethylene diammonium halogeno salt and second halogenated hydrocarbon are added to deionized water, so as to prepare bis-substituted N, N'-1, 4- dialkyl triethylene diammonium halogeno salt; (3) the bis-substituted N, N'-1, 4- dialkyl triethylene diammonium halogeno salt is added to tetrafluoro boric acid aqueous solution, so as to prepare a crude product of asymmetric N, N'-1, 4-dialkyl triethylene diammonium tetrafluoroboratel; (4) the crude product of asymmetric N, N'-1, 4-dialkyl triethylene diammonium tetrafluoroboratel is dissolved through solvent and has decoloring agent added ...

1,4-dihydropyridines compound containing azulene structure and preparation method thereof

Conveying device of copper mine filling material for mining industry

The invention relates to the field of mining industry, in particular to a conveying device of a copper mine filling material for the mining industry. Comprising a support, a conveying cylinder, a conveying mechanism and an adjusting mechanism. The conveying mechanism comprises a main shaft, conveying blades, a sleeve and a conveying pipe; and the conveying blades are spiral elastic sheets. When the filling material is filled to the fixed closed position through the conveying pipe and the remaining space of the goaf is smaller than a preset value, the driving sleeve drives the front end of the conveying blade to move backwards through the connecting assembly to push and press the conveying blade, so that the screw pitch of the conveying blade is reduced, and the speed of conveying the filling material to the goaf is adjusted according to the size change of the remaining space; and when the filling material is filled to the fixed closed part, the damage caused by large extrusion force applied ...

Mobile type pressure plate for end face clamping and clamping device

The invention discloses a mobile type pressure plate for end face clamping. The pressure plate is used for clamping a sleeve; one end of the pressure plate upwards extends, and the longitudinal section of the extending end is Z-shaped; an elongated hole is formed in the middle of the pressure plate; the lower end face of the extending end of the pressure plate is step-like; the side surface of the step is an arc surface; the radius of the arc is matched with that of an outer circle of the sleeve. The invention also discloses a clamping device. The clamping device comprises the pressure plate and a clamp body; the pressure plate and the clamp body clamp the sleeve; the sleeve is clamped between the extending end of the pressure plate and the clamp body; the outer circle of the sleeve is in contact with the side surface of the step at the extending end of the pressure plate. The clamping device also comprises a screw; the screw penetrates through the elongated hole in the middle of the pressure ...

Application of load type catalyst in synthesizing N phenyl maleimide

Method for preparing quinoline derivative

The invention discloses a method for preparing a quinoline derivative. The quinoline derivative serving as a goal product is prepared by cyclizing aniline or an aniline derivative with alpha, beta-unsaturated aldehyde and ketone in acidic ionic liquid under the catalysis of iodine or iodide. A synthesis method provided by the invention has the characteristics of high reaction selectivity, high yield, mild reaction conditions, environmental friendliness and the like, and is suitable for industrial production; a product is easy to separate; and the ionic liquid can be recycled.