Process for preparing alkylaryl ether

A method for synthesizing alkylaryl ether features that two alkyl groups in sulfuric acid dialkyl ester are used stepwise, that is, equimolar sodium phenolate and sulfuric acid dialkyl ester react at 10-40 deg.C to generate solution of alkylaryl ether and sodium alkyl sulfate and after separation of alkylaryl ether the sodium alkyl sulfate and equimolar sodium phenolate react at 90-105 deg.C, so alkylaryl ether is continuously separated out.

Method for preparation of meso-tetraphenyl porphyrin compound

Method for manufacturing ribbed polishing plates by using assembled scraping and polishing moulds and product thereof

The invention relates to a method for manufacturing ribbed polishing plates by using assembled scraping and polishing moulds and a product thereof. The method is characterized by comprising the following steps of: firstly generating a predetermined number of ribs which have scraping and polishing effects on both sides and gap surfaces and are in predetermined shapes by adopting a predetermined number of monolithic scraping and polishing wheels with predetermined thicknesses, dimensions and shapes; and then scraping and polishing the upper flat surfaces of the ribs of plates and other areas of the plates, which are not scraped and polished, except for rib gaps by using the predetermined number of monolithic scraping and polishing wheels with the predetermined thicknesses and dimensions and wheel faces in predetermined recessed shapes respectively or in an assembling way, or integral cylinder formative roller scraping and polishing moulds or integral cylinder formative roller scraping and ...

Lubricant for producing non-copper plating solid core welding wire and preparation technology of welding wire

The invention provides a lubricant which is used in the protection of the production of solid-core welding wires by using non-copper-plating carbon dioxide gas and a production technology of the welding wires. The lubricant is formed by mixing graphite and ferrous oxalate. The production technology of the welding wires comprises: steel wires with the diameter of Phi 5.5mm for welding are firstly drawn to the semi-finished welding wires with the diameter of Phi 1.865mm; the semi-finished welding wires with the diameter of Phi 1.865mm are drawn to the finished welding wires; the production technology is characterized in that: the lubricant which is formed by mixing the graphite and the ferrous oxalate is added in a mould box of the final two or three-channel mould during the drawing process into the finished welding wires; or the mixture of water-soluble dry wire drawing lubricant and triethanolamine stearate is added in the mould box of the former one or two-channel mould before adding the ...

Leather cleaning agent

Pickle liquor for removing mill furnace cinder of hot-rolled chromium stainless steel and method for removing mill furnace cinder

The invention provides an acid lotion for removing an oxide coating of hot-rolled chromium stainless steel and a method for removing the oxide coating, wherein the acid lotion is prepared by mixing sulfuric acid which is adopted as a pickling medium and Aliphatic Amine hydrochloride, Trichloroisocyanuric Acid, mannich hydrochloride and thiourea which are adopted as additives. The method for removing the oxide coating comprises the following steps: firstly, the hot-rolled chromium stainless steel wire rod is immersed into the acid lotion; secondly, the acid lotion is warmed up to 80-90 DEG C to react for 100 to 120 minutes; and thirdly, the wire rod is taken out and rinsed with high-pressure water to remove the oxide coating. The acid lotion can effectively remove the oxide coating of the hot-rolled chromium stainless steel, and particularly has good effect of removing oxide coatings for 1Cr13, 2Cr13 and 3Cr13 wire rods. The acid lotion can also be used for removing an oxide coating of hot-rolled ...

Hybrid synergy drive system and vehicle

The utility model provides a hybrid synergy drive system and vehicle, this system includes: the engine, the derailleur, including a main shaft, the countershaft, the clutch, half synchronous ware, input gear, a drive gear, the secondary drive gear, the 3rd drive gear, output gear and output shaft, the main shaft, countershaft and output shaft are parallel, the engine links to each other with the main shaft, the empty cover of the 3rd drive gear is on the main shaft, clutch is in main shaft and the 3rd drive gear, input gear and drive gear meshing, secondary drive gear and the meshing of the 3rd drive gear, the 3rd drive gear and output gear meshing, input gear, among a drive gear and the 2nd drive gear no. 1 is connected with the through -drive at place through half synchronous ware, firstmotor links to each other with the engine, the second motor links to each other with main shaft or countershaft, and the derailleur is located between first motor and the second motor. The utility model ...

Preparation method of anisole

The process features the full reaction of excess dimethyl sulfate on sodium phenate to obtain anisole as intermediate of organic synthesis, and has the advantages of low productive cost and solves the problem of environmental pollution, because of transforming residual dimethyl sulfate into sodium sulfate by sodium hydroxide.

Artificial three-dimensional simulation physical model manufacturing method based on composite sand body configuration characteristics

The invention relates to an artificial three-dimensional simulation physical model manufacturing method based on composite sand body configuration characteristics. The method comprises the following steps: determining a composite sand body boundary range, superposition characteristics and permeability of a single sand body; establishing a composite sand body style numerical model, and determining a well spacing mode; the method for manufacturing the artificial three-dimensional simulation physical model comprises the following steps of: preparing different single sand body models according to a single sand body thickness ratio; different single sand body models are put into a mold according to the overlapping characteristics of the composite sand body, and the space between the different single sand body models is filled with an interlayer material; the injection-production well is buried in the corresponding position according to the well spacing mode; and heating and curing to form an ...

Automatic dialling wireless paging telephone set

The paging set is a radio communication device, and it features its dialling driving circuit and audio generator. During receiving paging signal, the telephone number to be re-called is dialled by the double-tone multi-freq sound or DTMF sound sent by dialling to drive circuit-driven loudspeaker. The said paging set is convenient in use and is esp suitable for blind person.

Circuit breaker with ability of quick reaction and separation and quick reaction and separation method for circuit breaker

The invention discloses a circuit breaker with the ability of quick reaction and separation and a quick reaction and separation method for a circuit breaker. The circuit breaker comprises a broken circuit contact group and a joint contact group; the broken circuit contact group comprises a movable broken circuit contact; the joint contact group comprises a movable joint contact; and a movable contact limiting device used for limiting position moving of the broken circuit contact and/or the joint contact is arranged between the broken circuit contact group and the joint contact group. The quick reaction and separation method for the circuit breaker comprises a broken circuit opening step: the broken circuit contact, earlier than the joint contact, reversely moves and is separated independently, or the broken contact and the joint contact reversely move and are separated at the same time. The broken contact is adopted for replacing a fixed contact in the traditional technology, in the case ...

一种化学置换镀银添加剂及其制备方法和应用

The invention relates to a chemical displacement Ag plating technique, concretely an Ag plating additive and its preparing method and application. The components of the additive include first component, second component and third component in weight percent of 1 to 0.01-0.1-0.05 to 0.12, where the components of the first component include chlorogenic acid, nicotinic acid and 3, 4', 4', 41''-copper tetra sulfophthalocyanine tetrasodium salt in the weight percent of 1 to 500-750 to 100-250; those of the second component include polyglycol 6000, peregal and ascorbic acid in the weight percent of 1 to 0.5-1.2 to 0.1-0.6; those of the third component include 2-mercapto benzothiazole, benzotriazole and benzyl thiorea hydrochloride in the weight percent of 1 to 0.8-1.5 to 1-1.5. By using this additive, it need not usecyanide and reducer (like glucose), can continuously plate the iron-based line material and also be applied to iron-based sheet material, beneficial to industrial production.

Preparation method of dimethoxy-DT

The process for preparing dimethoxy-DT, that is, 1,1,1-trichloro-2,2-bis (4-methoxylphenyl) ethane is that excess anisol reacts on chloral under catalysis of sulfuric acid to obtain said product and recover residual anisol, and features that the sulforated ratio of anisol is decreased by controlling consumption of sulfuric acid for full recovery of residual anisol (up to 11%).

Chemical replacement silver plating additive, method for making same and use thereof

一种镀青铜添加剂及其制备方法和在胎圈钢丝镀青铜中的应用

The invention relates to a chemical displacement bronze plating technique, concrete a bronze plating additive and its preparing method and application in plating bronze on rim steel wire. The additive uses tetrabenzyl porphyrin, 3, 4', 4', 4''-copper tetra sulfophthalocyanine tetrasodium and mulberry skin element to compose the first component, uses sodium dithio propyl sulfonate, 2-benzimidazle, dihydroxylmethyl thiourea, 1, 1'-quintic methyl di(1-mythyl)pyrrolidine tartaric acid to compose the second component, and using polyglycol 6000, sodium dodecyl benzene sulfonate, alkyl polyoxyethylene ether sulfated ester and cobalt bichloride to compose the third component; the ratio of the first component to the second component to the third component = 1 : 50-400 : 70-450 (w/w). The method is simple. The working temperature of the additive is 20-35 deg.C, it does not produce acid mist, the plating solution has above 3 month long stable period and after plated with bronze, the steel wire does ...

Monitoring method and system based on interface

The invention provides an interface-based monitoring method and system, and relates to the technical field of fault monitoring. The monitoring method based on the interface comprises the steps that a request is sent to a preset interface on a server regularly, and the server is deployed with micro-services; according to application scenes integrated in the preset interface, the server runs micro-services corresponding to the application scenes, and the application scenes are in one-to-one correspondence with the micro-services; when the operation of the micro-service fails, generating corresponding error reporting information in real time; and sending the error report information to a specified receiver in real time through a preset sending mode. According to the technical scheme of the invention, the receiver can master the fault of the server and the micro-service at the first time, and can process the current fault in time after the fault information is mastered, so that the user experience ...

Bead polished board and manufacturing method thereof

The invention relates to a rib polishing plate and a manufacturing method thereof. The supper surface of the rib polishing plate is provided with one to a thousand ribs; the height, the breadth and the space of the ribs are respectively 0.01 mm to 20 mm, 1 mm to 1,000 mm and 0.01 mm to 800 mm; the upper surface of the plate and the surfaces of the ribs are integrally polished surfaces; the shapes of the cross sections of the ribs include a square, a rectangle, a semicircle, a trapezoid, a triangle, a smaller semicircle less than a semicircle or a stacked up special shape formed through the permutation and combination of the shapes. Moreover, the plate can be made from porcelain, glass, microcrystalline glass, artificial stone or natural stone.

Line point cloud tree segmentation method based on ground point removal and density-oriented filtering

The invention relates to the technical field of computer vision, in particular to a line point cloud tree segmentation method based on ground point removal and density-oriented filtering. Adaptive ground point removal: rasterizing a point cloud scene to obtain a function corresponding relation between elevation and point cloud density; tree instance extraction based on K-Means clustering and density-oriented filtering: calculating feature values of point cloud data in three dimensions of xyz, deriving three geometric features and shape feature indexes of points, and clustering unstructured point clouds; and deleting the clusters with non-green intra-cluster color statistical values and insufficient clustering point cloud quantity and outliers. According to the design of the invention, the shape features of each point can be rapidly and accurately obtained, so that the tree instance structure can be rapidly distinguished, the influence of non-clustering clusters and discrete points is effectively ...

Novel rib polishing plate and manufacturing method thereof

The invention relates to a novel rib polishing plate, which is a polishing plate with ribs and is manufactured by processing a ceramic plate, glass and nucleated glass plates, and an artificial stone plate, a natural stone plate or a wood plate. The novel rib polishing plate is characterized in that a surface prospective region of the rib polishing plate contains a reflecting material, a self-luminescent material or a mixed material of the two types of materials with the thickness between 0 and 10 mm. Particularly, when the rib polishing plate of which the surface of each rib interval region contains the reflecting material, the self-luminescent material or the mixed material of the two types of materials is used as a step and non-slip floor, because of the characteristics of energy saving, environmental protection, safety and attractive appearance, the rib polishing plate has a great market application value.

Aseptic gloves

The utility model provides an aseptic gloves, its includes palm portion and shaft type sleeve portion, sleeve portion is connected with palm portion, aseptic gloves's surface coating has iodophor liquid, sleeve portion turns over the back from inside to outside and covers palm portion and overlapping the outside of palm portion makes the surface of palm portion with the surface of sleeve portion is just right each other, the relative both sides of the one end of not being connected with palm portion of sleeve portion are together sealed. Because the utility model discloses an aseptic gloves is at its surface iodophor liquid that has coated in advance, and when not using, outer paux portion seals up the tip of sleeve portion for iodophor liquid can not volatilize. During the use, only need tear sealed one end at the scene, with gloves wear on hand and with sleeve portion turn down can, very convenient. Do not need the multiple equipment of advance preparation, more need not arrive iodophor ...

System for converting kinetic energy of original inertia into electric energy for recycling during braking

The invention relates to a system for converting the kinetic energy of original inertia into electric energy for recycling during braking, in particular to a system for converting kinetic energy produced by the original movement inertia during the brake deceleration braking of moving machines, motor vehicles and other moving locomotives into electric energy for recycling. The system can provide renewable energy sources and has the advantages of energy saving, environmental protection and broad market prospect. The system is characterized by comprising a brake deceleration braking device of the moving locomotive per se, a connection device for converting the kinetic energy produced by the inertia of the moving locomotive into mechanical energy, a power generating device for converting the mechanical energy into electric energy and a device for storing and recycling or directly utilizing the electric energy produced by the power generating device.

Contactor driven by capacitive stored energy

The invention discloses a contactor driven by capacitive stored energy. The contactor comprises at least one joint contact, a joint electromagnet, an electromagnet drive circuit and an open circuit energy storage capacitor. The open circuit energy storage capacitor is connected to the contactor, so that the contactor can still drive the open circuit electromagnet to enable the joint contacts to reset in an opened state under the condition of no power supply, action is rapid and reliable, using potential safety hazard of the contactor is effectively reduced, and the contactor and the relevant circuits are protected; in addition, through design of a starting button and a break button, the contactor can be switched on and off in an automatic, semi-automatic and manual mode, various flexible control modes are achieved and enriched, and the contactor is safer and more reliable. The contactor can be widely applied to the field of various contactors.

Method and system for measuring and calculating delivery quantity of shared electric bicycles based on supply and demand balance

The invention discloses a shared electric bicycle delivery quantity measuring and calculating method and system based on supply and demand balance, and the method comprises the steps: constructing a regression model through shared electric bicycle order data, shared electric bicycle electronic fence data, urban point of interest POI data and traffic zone data, and analyzing the use characteristics and influence factors of shared electric bicycles. A traffic zone is divided into a delivery reasonable area, a delivery supersaturation area and a delivery undersaturation area according to model residual errors, the delivery gap amount of the shared electric bicycles is predicted by analyzing borrowing and returning demands of the shared electric bicycles in different areas, and the delivery amount of the shared electric bicycles is determined from the angle of supply and demand balance on the basis of measuring city parking bearing capacity. According to the invention, on the basis of analyzing ...

Electric power topological relation identification method and device, computer equipment and storage medium

The invention discloses a power topological relation identification method and device, computer equipment and a storage medium. The method comprises the following steps: issuing a power utilization characteristic generation command to each sub-equipment in sequence; collecting real-time power utilization characteristic information of each sub-device after the power utilization characteristic generation command is issued; according to the real-time power utilization characteristic information of the sub-equipment under the same power utilization characteristic generation command, determining a membership relationship between the target sub-equipment indicated by the power utilization characteristic generation command and the associated equipment; taking the root device as a root node, and obtaining a path from the root device to each sub-device through traversal according to the membership relationship corresponding to each sub-device; selecting a longest path from all paths from the root ...

Copperplating additive, its preparation method and application in coppered welding wire

The copperplating additive is formed from three components of organic mixtures with the weight ratio of first component: second component: third component=1:50-400:70-450. Its application in copperplating wire rod is characterized by using cupric sulfate, ferrous sulfate, concentrated sulfuric acid and copperplating additive according to a certain proportion to prepare plating solution to implement copperplating operation at 30-45 deg.C. Said invented additive is easy to prepare, its cost is low, and its copper-plating temp. is low, and said plating operation does not produce acid mist and other pollution.

Telephone signal receiver

The telephone signal receiver as an additional device of telephone set for notifying of coming telephone is composed of sender between outside line and telephone set and receiver carried by user. When dialing in, sender emits a RF signal which is accepted by receiver, which notifies the user of that in the form of vibration, light or sound.

Data polling scheduling method and device, equipment and storage medium

The embodiment of the invention discloses a data polling scheduling method and device, equipment and a storage medium, and the method comprises the steps: determining a data transmission state of each data collection device, wherein the data transmission state is used for reflecting the data transmission success rate when the data collection device transmits data to a wireless communication device; each data acquisition device corresponds to a service flow queue comprising a plurality of grouped data and a data address of each grouped data; determining an initial weight of a service flow queue inversely proportional to the data transmission success rate by using the data transmission success rate; and performing weighted polling scheduling processing on the grouped data according to the initial weight and the data address of each service flow queue, and determining a target transmission queue of the current data frame. Through the above mode, the weighted polling scheduling can be performed ...

Copperplating additive, its prepn. method and application in coppered welding wire

Water base lubricant for drawing metallic fiber material and preparing process thereof

Intelligence lock butler

The utility model discloses an intelligence lock butler, including the lockhole, dab switch, tapered end, metal sheet, spring bolt no. 1, spring bolt no. 2, spring bolt no. 3, lock body, alarm disengage switch, handle chip, pronunciation chip and speaker, its characterized in that: be provided with on the tapered end and dab the switch, the one side of dabbing the switch is equipped with the metal sheet, the switching system that dabs who corresponds on the tapered end on the metal sheet has the lockhole, spring bolt no. 1, spring bolt no. 2 and spring bolt no. 3 are installed to one side of lock body, spring bolt no. 1, spring bolt no. 2 and the K1 of spring bolt no. 3 corresponding to the circuit, K2 and K3, and K0, K1, K2 and K3 adopt parallel connection, parallel connection can be so that each circuit be interference -free, the pronunciation chip is continuous with the processing chip corresponding to circuit IC1 corresponding to the IC2 of circuit, the pronunciation chip with handle ...

Pickle liquor for removing mill furnace cinder of hot-rolled chromium stainless steel and method for removing mill furnace cinder

The invention provides an acid lotion for removing an oxide coating of hot-rolled chromium stainless steel and a method for removing the oxide coating, wherein the acid lotion is prepared by mixing sulfuric acid which is adopted as a pickling medium and Aliphatic Amine hydrochloride, Trichloroisocyanuric Acid, mannich hydrochloride and thiourea which are adopted as additives. The method for removing the oxide coating comprises the following steps: firstly, the hot-rolled chromium stainless steel wire rod is immersed into the acid lotion; secondly, the acid lotion is warmed up to 80-90 DEG C to react for 100 to 120 minutes; and thirdly, the wire rod is taken out and rinsed with high-pressure water to remove the oxide coating. The acid lotion can effectively remove the oxide coating of the hot-rolled chromium stainless steel, and particularly has good effect of removing oxide coatings for 1Cr13, 2Cr13 and 3Cr13 wire rods. The acid lotion can also be used for removing an oxide coating of hot-rolled ...

Prepn. method of dimethoxy-DT

CLEANING AGENT

Chloroacetic acid producing method and reaction equipment thereof

The invention provides a chloroacetic acid producing method and reaction equipment thereof; the producing method comprises the steps of: adding acetic acid and acetic anhydride which is equivalent to 10 to 15 percent of acetic acid into a reaction kettle, raising the temperature to 80 to 100 DEG C and keeping the temperature, introducing chlorine under normal pressure for chlorination with the aidof microwaves, distilling acetyl chloride and chloroactic acid liquid from the reaction products by the reduced pressure distillation, putting the chloroactic acid liquid into a soft container and causing the chloroactic acid liquid to crystallize naturally in shaking state. The reaction equipment comprises a reaction kettle provided with an enamel lining and a reflux condenser; the reaction kettle is internally provided with a chlorine pipe which is externally sleeved with a fluid director; a microwave generator is arranged at the end opening of the reaction kettle; an emission head of the microwave ...

Aseptic gloves with iodophor liquid

The utility model provides an aseptic gloves with iodophor liquid is provided with the vacuole in the palm inboard, and it has iodophor liquid to hold in the vacuole. Be provided with the strip of tearing that is used for tearing the vacuole on the vacuole, perhaps the vacuole edge is provided with the handle that is used for revealing the vacuole. Because the utility model discloses an aseptic gloves with iodophor liquid has set up the vacuole that is equipped with iodophor liquid in the palm inboard, when using, only need do broken the vacuole and make wherein iodophor liquid stream go out then rub through the finger, uniformly can at palm and finger department with iodophor liquid coating. Need not the various equipment of advance preparation, medical personnel also need not at the scene liquid of falling iodophor, convenient operation.

Quick arc-breaking circuit breaker

The invention discloses a quick arc-breaking circuit breaker, which comprises two electrode contacts used for switching on and switching off a circuit. A plurality of partition plates are arranged between the two electrode contacts. When the two electrode contacts are out of power and are separated, the plurality of partition plates are inserted at the fastest speed between the two electrode contacts so as to break arc and stop burning at the fastest speed. As the plurality of partition plates are arranged between the electrode contacts, insulation and arc extinguishing effects in the case of circuit breaking of the circuit breaker can be enhanced; the plurality of partition plates are inserted between the two electrode contacts from different directions, the breaking insulation speed is quickened, isolation and sealing effects between two electrode contacts can be enhanced, the structure is simple, the manufacturing cost is low, good economic and social benefits are provided, and the quick ...

Process for preparing alkylaryl ether

Post-processing edge pre-shaped slab and preparation method thereof

The invention discloses a post-processing edge pre-shaped slab which is prepared by the raw materials of porcelain raw material, or glass raw material, or glass ceramics raw material, or artificial stone raw material, and is characterized in that the slab surface is cut into post-processed edges, the quantity, the shape, the angle and the depth of the edges used for postprocessing of the slab are preset; and the slab is formed on a green body.

Power line communication method and related equipment

The embodiment of the invention discloses a power line communication method and related equipment. The method comprises the following steps: acquiring information to be sent and a target power line; generating characteristic current based on the to-be-sent information and a Manchester encoding mode, and injecting the characteristic current into the target power line; acquiring a load current of a target power line carrying the characteristic current to obtain a current signal; and calculating an energy signal of the current signal to obtain a data frame corresponding to the to-be-sent information so as to complete a power line communication process. The mode of injecting the non-same-frequency modulation current into the power line is adopted, so that the communication process of the power line is not limited by the state of a circuit breaker, and the influence of same-frequency interference and large-current load is avoided. No matter what state the circuit breaker is in, effective communication ...

Method for establishing quality classification standard of offshore oilfield fluvial facies composite sand body reservoir

The invention relates to an offshore oilfield fluvial facies composite sand body reservoir quality classification standard establishment method, which comprises the following steps of: selecting well data with complete data, and determining qualitative or quantitative data information of composite sand body reservoir quality evaluation parameters; orderly assignment is carried out on the composite sand body superposition type and the composite sand body structure rhythm, standardization processing is carried out on the qualitative data information and the quantitative data information after assignment, and standardized data information is obtained; performing system clustering based on principal component analysis on the standardized data information to obtain a system clustering result; and performing data verification on a system clustering result, and determining a fluvial facies composite sand body reservoir quality classification evaluation standard. Structural features, geometric ...

Test method and system for data acquisition service system

The invention provides a test method and system for a data acquisition service system, and relates to the technical field of data acquisition. The test method of the data acquisition service system comprises the following steps: confirming whether basic information of the data acquisition service system meets a starting condition or not, and confirming whether a test environment is prepared or not; when the basic information meets the starting condition and the test environment is prepared, the data acquisition service system tests a preset business scene and obtains a test result; and comparing the test result with a preset result, and generating an analysis report. Through the method, defects and defects existing in the operation of the preset business scene can be actively found, so that targeted adjustment and optimization can be carried out.

Meter searching method, circuit breaker, electricity meter and computer readable storage medium

The embodiment of the invention discloses a meter searching method, a circuit breaker, an electric meter and a computer readable storage medium, and relates to the technical field of circuit breakers, and the method comprises the steps: transmitting a meter searching request frame to at least one electric meter, and resetting a first counter and a second counter; searching meter searching response frames in a receiving cache region according to a first preset time interval, the receiving cache region being used for storing meter searching response frames returned by the at least one electric meter according to a second preset time interval; storing the meter address of the electric meter corresponding to the meter searching response frame conforming to the standard response frame; and if the numerical value of the first counter is greater than a preset numerical value, searching all meter searching response frames according to a preset two-dimensional array and the second counter. According ...

CLEANING AGENT

Auxiliary power supplying and charging device

The invention discloses an auxiliary power supplying and charging device which comprises a control circuit and a connecting mechanism capable of being collected, wherein the connecting mechanism is arranged on a shell of electronic equipment or a battery component and used for connecting a standard dry battery; the control circuit is communicated with the connecting mechanism; and when the electrical power of a chargeable battery in the electronic equipment or the battery component is in shortage, the standard dry battery is connected with the connecting mechanism for supplying power in an auxiliary way or charging the chargeable battery. The auxiliary power supplying and charging device has the advantages of convenient use and simple structure and cannot influence the normal operation, the appearance and the shape of the electronic equipment.

Process for preparing meso-tetraphenyl porphyrins compound

The process for preparing meso-tetraphenyl porphyrins compound by the reaction of pyrrole with aromatic aldehyde includes reaction of equimolar pyrrole with aromatic aldehyde in ether solvent for 2 hr under catalysis of substituted acetic acid, and addition of nitrobenzene as oxidant for reaction for 2-3 hr at reflux temp. It features use of nitrobenzen other than DDQ, no need of inertial gas and dewatering agent, and high yield.

Safe scalp acupuncture

The utility model provides a safe scalp acupuncture which includes syringe needle, body and needle file, the syringe needle passes through the needle file and is connected with the body, further include the clamping part, the clamping part passes through the connecting strip and connects in the needle file, the upside of clamping part is formed with the first recess that is used for the card to hold the syringe needle, the downside of clamping part is formed with the second recess that is used for the card to hold the body. Because the utility model discloses a safe scalp acupuncture has set up the clamping part, before pulling out the needle, detains the clamping part on the needle file earlier, promotes the clamping part when pulling out the needle simultaneously and moves along for the clamping part slides forward along the needle body of syringe needle, holds in the clamping part until the most advanced part with the syringe needle. Like this, the back is extracted totally to the syringe ...

用于拉拔金属线材的水基润滑剂及其制备方法

A water-based lubricant for drawing metal wires and method for making it, wherein the water-based lubricant employs phosphorodithioic acid composite ester amine salt and phosphorodithioic acid amine salt as extreme pressure antiwear agent, molecular films is easy to form on the friction pair surface of the metal wires, the application of polyacrylamide (PAM) not only forms adsorbed film on the wire rod surface, but also can result the oil dirt coagulation during the drawing process.