155 results about "P-nitrobenzoic acid" patented technology

The invention relates to a synthesis method for paranitrobenzoyl chloride and belongs to the field of fine chemical industry. The method is characterized by comprising the following steps: directly reacting p-nitrobenzoic acid with sulfoxide chloride under the catalytic action of quaternary ammonium salt; distilling and recovering the residual sulfoxide chloride; and distilling under reduced pressure to obtain high-purity paranitrobenzoyl chloride. The sulfoxide chloride serves as an acyl chlorination reagent and a solvent and organic solvents such as carbon tetrachloride are not required, so recycling of solvents and materials and energy loss are avoided, the obtained product has high purity and does not need to be refined, the chromatograph content of the product obtained by primary distillation can reach over 99.5 percent, production cost is reduced, the yield of equipment is increased, blockage of pipelines is avoided, and burden is reduced for the subsequent procedure.

The invention discloses working electrolyte for the aluminum electrolytic capacitor with wide working temperature range and high voltage and the manufacturing method. The invention includes the following materials (calculating with weight percent): 60 percent to 80 percent glycol, 5 percent to 20 percent Gamma butyrolactone, 0 percent to 5 percent water, 2 percent to 5 percent ammonium sebacate, 5 percent to 10 percent isosebacic acid ammonium, 0 percent to 5 percent sebacic acid, 0.1 percent to 2 percent ammonium dihydrogen phosphate, 0.1 percent to 1 percent citric acid, 0.1 percent to 2 percent p-nitrobenzoic acid and 5 percent to 20 percent polyethylene glycol. The manufacturing method is as follows: (1) well-mixing the glycol, Gamma butyrolactone and water and heating to 60 DEG C through 90 DEG C; (2) adding the ammonium sebacate, sebacic acid, ammonium dihydrogen phosphate, citric acid, p-nitrobenzoic acid, polyethylene glycol to the mixed solvent and well-mixing; (3) after ample dissolution of the materials, keeping the temperature in the step (3) for five through thirty minutes; (4) adding the isosebacic acid ammonium to the mixture and keeping the temperature in the step (3) for five through thirty minutes, and stopping heating and natural cooling in the air, and obtaining the aluminum electrolytic capacitor with wide working temperature range and high voltage. The product increases the conductivity and the sparking voltage of the working electrolyte and reduces the production cost.

The invention relates to a detergent for automobile windshields, in particular to a detergent for antifogging automobile windshields with the minimum using temperature of minus 40 DEG C; the detergent mainly consists of the raw materials with the weight (percent): water solution with 30 percent of coconut oil amide propyl betaine: 1 to 5, ethylene glycol monobutyl ether: 1 to 15, propanediol: 10 to 15, water solution with 50 percent of alkyl glucoside: 1 to 10, p-nitrobenzoic acid: 0.16 to 3, water solution with 30 percent of cocamidopropylamine oxide: 1 to 2, isopropanol: 30 to 50 and tributyl phosphate: less than or equal to 0.01; the preparation method is that firstly the raw materials are dissolved, and the dissolved raw materials are uniformly mixed and the rest water is added and the raw materials and the water are uniformly stirred to obtain the detergent. The product which is colorless transparent liquid can be used in winter in most areas and can clean common fouling on the automobile windshields; the product has certain antifogging effect and reduces the occurrence of traffic accidents; most of the raw materials adopted by the detergent are novel green environmental protective surfactants which can be well degraded and can effectively reduce pollution to the environment; the product is wide in application range and has wider market prospects.

The invention relates to low silicon content coolant liquid applicable to an aluminum radiator of a heavy-duty commercial vehicle engine, and belongs to coolant liquid. The coolant liquid comprises the following raw materials in portion by weight: 36 to 52 portions of terylene grade glycol, 1.0 to 1.5 portions of mannite, 0.3 to 0.7 portion of phenylformic acid, 0.7 to 0.9 portion of adipate, 0.1 to 0.2 portion of methylbenzotriazole, 0.05 to 0.1 portion of p-nitrobenzoic acid, 0.001 to 0.004 portion of polyether, 0.3 to 0.7 portion of potassium phosphate, 0.2 to 0.25 portion of sodium nitrite, 0.25 to 0.3 portion of sodium nitrate, 0.5 to 1.0 portion of borax, 0.007 to 0.02 portion of sodium silicate, 0.45 to 0.68 portion of sodium hydroxide, and distilled water for fixing the volume to 100 portions. The coolant liquid contributes to improvement of heat exchange and cooling performance of a water jacket of the engine, is more adapted to an aluminum water tank radiator, is adapted to sedans and light vehicles, and is more adapted to heavy-duty commercial vehicles.

The invention relates to a preparation method for p-aminobenzamide. The preparation method comprises the following steps: (1) enabling p-nitrobenzoic acid to react with thionyl chloride in the presence of an organic base catalyst to obtain paranitrobenzoyl chloride liquor which is directly used for next-step reaction; (2) dropwise adding the paranitrobenzoyl chloride liquor into 10wt%-30wt% ammonium hydroxide, reacting and carrying out suction filtration on the mixture to obtain p-nitrobenzamide; and (3) enabling p-nitrobenzamide and hydrazine hydrate to carry out reaction in a solvent in the presence of ferric hydroxide or a material attached with ferric hydroxide to obtain p-aminobenzamide, wherein filtrate produced in the step is recycled for the next batch of reactions. The preparation method is high in product yield, low in cost, good in quality, capable of satisfying green and environment-friendly production requirements, simple and convenient to operate, and convenient for industrialization.

The invention relates to a preparation method and applications of a hyperbranched azo polymer, belonging to the organic synthesis field. The preparation method comprises the steps: firstly, performing nitroreduction and carboxyl acylation by taking p-nitrobenzoic acid as a raw material, to obtain an A2 type monomer azo-bi(benzoyl chloride) with an azobenzene structure, and then reacting the A2 type monomer azo phthaloyl dichloride with a B3 type monomer glycerol according to certain mole ratio to obtain the hyperbranched azo polymer. The materials of the obtained hyperbranched azo polymer has higher thermo-optical coefficient which is more than ten times of that of inorganic materials such as borosilicate glass, zinc silicate glass, silica glass and the like, and the material provides a possibility for developing a novel digital thermo-optical switch with low driving power.

The present invention relates to the technical field of electrolytes, in particular to a highly aqueous and high-stability electrolyte used for an aluminum electrolytic capacitor and a preparation method therefor. The electrolyte comprises the following raw materials in parts by weight: 10-14 parts of ammonium adipate, 6-10 parts of a water-proofing agent, 4.5-7 parts of ammonia, 3-5 parts of ammonium formate, 1-2 parts of p-nitrobenzoic acid, 0.5-1 part of phosphoric acid, 6-10 parts of glycol and 50-70 parts of deionized water. The electrolyte is prepared by means of interaction among the raw materials and by strictly controlling a weight proportion of the raw materials; the sparking voltage of the prepared electrolyte can reach 102 V and the conductivity rate of the prepared electrolyte can reach 100 ms / cm; and the electrolyte has good electrochemical properties, has the advantages of high frequency, low impedance and high stability, and can be applied to manufacturing of the aluminum electrolytic capacitors.

The invention relates to the electrolyte technical field, and particularly to a high water system electrolyte with high frequency and low impedance for an aluminium electrolytic capacitor and a preparation method thereof. The electrolyte comprises the following raw materials by weight parts: 8-12 parts of ammonium adipate, 8-12 parts of anti-hydrating agents, 1.5-2.5 parts of ammonia water, 1-2 parts of p-nitrobenzoic acid, 0.5-1.5 parts of phosphoric acid, 4-7 parts of glycol, and 60-80 parts of deionized water. Through interaction of the raw materials and strict control of the weight ratio of the various raw materials, the spark voltage of the prepared electrolyte can reach 105V, and the conductivity can reach 50ms / cm. The high water system electrolyte of the invention has good electrochemistry characteristic and high frequency and low impedance, can be applied to the manufacture of the aluminium electrolytic capacitor.

The invention provides a microminiature rapid charging special-purpose aluminium electrolytic capacitor which comprises a shell, a core bag and a rubber plug. The core bag is sealed in the shell through the rubber plug. The core bag contains electrolyte which comprises a solvent, an inorganic acid ammonium salt, an organic acid ammonium salt, and a hydrogen elimination agent. The inorganic acid ammonium salt is ammonium borate or ammonium pentaborate or the mixture of the ammonium borate or the ammonium pentaborate. The organic acid ammonium salt comprises one or more of ammonium sebacate, ammonium azelate, diammonium phthalate, and dodecyl ammonium carboxylate. The hydrogen elimination agent comprises one or more of a p-Nitrobenzyl alcohol, a p nitroanisole and p-nitrobenzoic acid. The conductivity of the electrolyte in the invention is between 2.4 ms / cm to 2.8ms / cm, the ESR value of a product can be effectively reduced, thus the ripple resistance and lightning strike resistance ability of the product are improved greatly, the flash fire voltage is above 490V, in a condition of high voltage, the breakdown of electrolytic paper caused by flash fire of the electrolyte does not appears, and thus the voltageproof performance of the product is ensured.

The invention relates to the field of production of chemical engineering products, in particular to a method for synthesizing p-nitrobenzoic acid. The method comprises the following steps of using p-nitrotoluene as the raw material, using diluted nitric acid as a reaction medium and a catalyst, using oxygen as an oxidant, and oxidizing in a high-pressure kettle, so as to prepare the p-nitrobenzoicacid; cooling, separating crystal form solid in the reaction liquid, sucking and filtering, so as to obtain a mother liquid and filter cake; spraying the filter cake by water, and drying, so as to obtain a light yellow product, namely p-nitrobenzoic acid. The method for synthesizing the p-nitrobenzoic acid has the advantages that the production purity is high, the preparation is simple, the costis low, the pollution is avoided, and the green effect is realized.

The invention discloses a synthesis method of 1,3-propanediol-bis(4-nitrobenzoic acid)ester. The synthesis method comprises the following steps: a) putting 1,3-propanediol and nitrobenzoic acid at a mol ratio of 1:(1.5-2.5) into a reaction kettle, heating to 130-150 DEG C, reacting for 6-8 hours, then heating to 180-200 DEG C and reacting for 5-8 hours; and b) adding a solvent and a catalyst into materials, introducing hydrogen gas to carry out hydrogenation reducing reaction at the temperature of 80-100 DEG C, filtering and recovering the catalyst immediately after reaction is finished, concentrating, then carrying out cooling crystallization, filtering and drying to obtain the 1,3-propanediol-bis(4-nitrobenzoic acid)ester product. The method disclosed by the invention has the characteristics of easily available raw materials, convenience in operation, high yield, high product purity, low cost and less produced three wastes, and is especially suitable for industrial production and is beneficial to environmental conservation.

The invention relates to a synthetic method for an ultraviolet absorbent--octyl triazone. The method comprises the following steps: with sodium bisulfate as a catalyst, reacting p-nitrobenzoic acid with isooctanol under the action of toluene so as to prepare an intermediate I; allowing the intermediate I to be reduced by iron powder and ammonium chloride in a methanol-water solution so as to obtain an intermediate II; subjecting the intermediate II to reaction with melamine in an acetone solution so as to prepare an intermediate III; and subjecting the intermediate II and the intermediate III to reaction in a toluene solution so as to obtain octyl triazone, wherein the purity of liquid phase reaches 99.45%. The synthetic method provided by the invention has the characteristics of usage of easily-available raw materials, mild reaction conditions, short reaction time, low pollution, high yield, etc., and is suitable for industrial production.

The invention discloses a high-temperature-resistant long-service-life aluminum electrolytic capacitor, which comprises a core cladding, a shell arranged outside the core cladding, and colloidal particles covering the core cladding and used for sealing the shell, and is characterized in that the core cladding adsorbs electrolyte; the electrolyte is composed of a solvent, a solute and an additive,wherein the solvent of the electrolyte is ethylene glycol; the solute of the electrolyte comprises ammonium hydrogen azelate, ammonium dodecanedioate, diammonium hydrogen citrate and ammonium isosebacate; the additives comprise ammonium p-nitrobenzoate, p-nitrophenol, monobutyl phosphate, ammonium hypophosphite, nano silicon dioxide, polyethylene oxide ether, 8-hydroxyquinoline and polyborate. Through the electrolyte, the temperature resistance of the electrolyte can be improved, volatilization of the electrolyte at a high temperature is reduced, saturated vapor pressure is reduced, the conductivity of the electrolyte is improved, DF and ESR values of the capacitor are reduced, spontaneous heating in the capacitor is reduced, the high-voltage aluminum electrolytic capacitor can resist a high temperature of 115 DEG C or above, and the service life of the high-voltage aluminum electrolytic capacitor is guaranteed.

The invention relates to a cleaner, particularly relates to an industrial metal cleaner, and belongs to the technical field of cleaning of industrial equipment. The industrial metal cleaner comprises the following components in percentages by weight: 2.0-6.0% of short fatty alcohol polyoxyethylene ether, 1.5-2.5% of propylene glycol, 0.6-1.2% of sodium silicate, 0.6-1.2% of oxalic acid, 0.6-2.2% of anionic polyacrylamide, 1.2-2.5% of p-nitrobenzoic acid, 0.6-1.2% of linoleic acid, 2.0-7.0% of ethylenediamine tetraacetic acid (EDTA), 4.0-5.0% of benzotriazole, 3.2-3.9% of polyvinylpyrrolidone, 4.0-5.5% of mesoporous silica and the balance of deionized water. The particle size of the mesoporous silica ranges from 100 nm to 500 nm. The industrial metal cleaner is scientific and reasonable in design, meets market situations according to the present demands, and has huge market economy prospects.

The present invention provides one kind of hydraotalcite with photochromic characteristic and its preparation process, and belongs to the field of hydraotalcite preparing technology. The hydraotalcite has crystal structure and chemical expression of [(M2+)1-x(M3+)x(OH)2]x+(An-)x / n.mH2O, where x is 0.1-0.33, m=3-6 is interlayer crystallized water molecule number, M2+ expresses bivalent metal ion Ni, Co or Fe, M3+ expresses trivalent metal ion Co, Fe, Al or Ga, and An- is anion nitrate radical, p-nitrobenzoate radical, m-nitrobenzoate radical, p-aminobenzoate radical, p-aminobenzene sulfonate radical or chlorobenzoate radical. The present invention has the advantages of synthesis of hydraotalcite with photochromic characteristic for the first time, simple preparation process, low cost and easy reaction.

The invention provides a method for preparing p-nitrobenzoic acid utilizing waste polystyrene: waste polystyrene is defoamed and crashed and then is put into a reaction bulb of a microwave reactor; nitrated oxidant and catalyst are added; reaction temperature, reaction pressure, and microwave power are set; stirring with magnetic force is carried out for 10min-4h; after the reaction, the temperature is cooled to the room temperature to precipitate p-nitrobenzoic acid which is made after pickling and crystallization. For raw material, the invention turns waste polystyrene into treasure; simultaneously, disadvantages of a common method of multi-step operation, low yield coefficient and purity are avoided. Compared with traditional methods, the invention has obvious improvement in purity and yield coefficient of p-nitrobenzoic acid made by one-step microwave method, high productivity effect, and good application prospect in industry. The method for preparing p-nitrobenzoic acid utilizing waste polystyrene makes complexation of two kinds of metallic ions on a sepiolite to form novel catalyst and has a good reaction effect, thus increasing the product yield and lowering the production cost.

The invention discloses a green preparation process of benzocaine. The process comprises the steps that p-nitrobenzoic acid and ethanol are subjected to esterification under the catalysis of concentrated sulfuric acid to obtain ethyl p-nitrobenzoate; ethyl p-nitrobenzoate is subjected to catalytic hydrogenation to obtain the benzocaine, wherein catalytic hydrogenation reaction is performed in water; the catalytic hydrogenation reaction temperature is 90 to 110 DEG C; the catalytic hydrogenation reaction pressure is 0.2 to 1.0MPa; the use quantity of water is 3 to 7 times of the weight of ethylp-nitrobenzoate; the weight ratio of ethyl p-nitrobenzoate to a catalyst is (1:0.001)-(1:0.1); the catalyst is a Pd / C catalyst with the mass fraction being 3 to 10 weight percent. Through the catalytic hydrogenation reaction, the use of organic solvents is avoided, so that the whole benzocaine preparation becomes a green process; the proper use quantity of water is selected, so that high reactionyield and product purity can be obtained.

The invention provides a method for synthesizing p-aminobenzamide, comprising the steps of: 1) taking a container, adding p-nitrobenzoic acid, triphosgene and a solvent, after the reaction is completed, collecting the solvent to obtain p-nitrobenzoyl chloride; ) take another reaction vessel, add ammonia and phase transfer catalyst, drop p-nitrobenzoyl chloride toluene solution to obtain p-nitrobenzamide; 3) take the reaction kettle, add p-nitrobenzamide, and add water, Catalyst, obtains described p-aminobenzamide. In the method, the amount of raw materials used is small and the reaction speed is fast. After the hydrogen chloride gas produced by the reaction is absorbed into hydrochloric acid by water, it can be used for other purposes, which effectively reduces the production cost. In the reduction reaction, the iron powder method is replaced by the hydrogenation method, so that the production The cost is reduced, no solid waste is generated, the labor load is greatly reduced, the process is environmentally friendly, and the economic benefit is good.

The invention discloses a double-functional molecular magnet material. The structural formula of the double-functional molecular magnet material is [Co (4-Cl-PH-terpy) <2>] [Dy<3> (p-NO<2>-PHCOO)<14>], wherein the Dy represents rare-earth meal dysprosium ions, the Co represents transition metal ions, the p-NO<2>-PHCOO represents p-nitrobenzoic acid negative ions, and the 4-Cl-pH-terpy represents 4-(4-chlorophenyl)-terpyridine. The double-functional molecular magnet material integrates two functions of slow relaxation and spin transition and is synthesized by a cobalt chloride hexahydrate (CoCl<2>6H<2>O), 4'-(4-chlorophenyl)-2,2':6',2''-terpyridine, dysprosium oxide (Dy<2>O<3>), nitrobenzoic acid and other raw materials. The double-functional molecular magnet material prepared by means of a preparation method has the advantages that the good slow relaxation behavior of the dysprosium (Dy) is retained, meanwhile the high and low spin transition of cobalt (Co) is achieved, and the double-functional molecular magnet material is unprecedented at home and abroad.

The invention provides a preparation method of N (4-aminobenzoyl)-L-glutamic acid. According to the method, p-nitrobenzoic acid is taken as a raw material, BTC / C2H4Cl1 is taken as an acylating chlorination agent, DMF (dimethyl formamide) is added to serve as an initiator, and p-nitrobenzoyl chloride is prepared through reaction at a reflux temperature; p-nitrobenzoyl chloride and sodium glutamate have condensation, and N-(4-nitrobenzoyl)-L-glutamic acid is prepared; N-(4-nitrobenzoyl)-L-glutamic acid is reduced by Pd / C / HCO2NH4, and N (4-aminobenzoyl)-L-glutamic acid is prepared. The preparation method has mild reaction conditions and is simple in process, easy to operate and suitable for industrial production; few three wastes are generated, and a product has high purity and high yield.

The invention discloses an environment-friendly preparation process of an N-(4-ethoxy carbonyl phenyl)-N'-methyl-N'-phenyl formamidine intermediate. The process comprises the steps of making p-nitrobenzoic acid and ethyl alcohol be subjected to an esterification reaction under the catalysis of concentrated sulphuric acid, conducting aftertreatment and catalytic hydrogenation on materials generated after the esterification reaction, and obtaining ethyl p-aminobenzoate; an aftertreatment procedure comprises the steps of removing ethyl alcohol in the materials generated after the esterification reaction through evaporation, then leaving remaining materials standing still for layering, and conducting neutralization treatment on materials on the lower layer. According to the environment-friendly preparation process, the concentrated sulfuric acid is separated out before neutralization treatment is conducted on the materials obtained after the esterification reaction, a great amount of high salinity waste water cannot be generated, environment pollution is reduced, and the yield of the esterification reaction can be raised.

The invention discloses a synthesis method of p-nitrobenzoic acid. Reacting is performed by adopting 2-p-nitrobenzoyl-2-acetamino-1,3-propylene glycol and nitric acid as raw materials and water as a solvent; after the reacting, p-nitrobenzoic acid is obtained through crystallization. According to the method disclosed by the invention, the reaction conditions are mild, the reacting is performed atrelatively low temperature and under normal pressure, the requirements on equipment are low, the reaction line is short and thus the reacting is easy to control and safe and reliable; moreover, the obtained crude product has the advantages of easiness in separation, high yield and high purity and is suitable for popularization.

The invention discloses a method for treating wastewater in production of p-nitrobenzoic acid, and belongs to the technical field of wastewater treatment. The method comprises the following steps of (1) resin adsorption: leading the wastewater into a container loaded with adsorption resin to perform resin adsorption, so as to obtain an adsorption solution; (2) low-temperature concentration: leading the adsorption solution into concentration equipment, and concentrating at the temperature of 70 to 95 DEG C, so as to obtain a nitric acid recycling solution and a condensing solution; (3) resin regeneration: leading a regeneration agent into the container containing the resin after adsorption in step (1) to regenerate, so as to obtain a regeneration solution; rectifying the regeneration solution, so as to obtain a rectification component and a tower bottom solution. The treatment method has the advantages that the byproducts can be recycled, or be drained after reaching the standards; theresource utilization of the byproducts is furthest completed; the zero-emission effect is realized; the wastewater treatment cost is reduced.

The invention relates to a preparation method of dimethyl ethyl aminobenzoate midbody nitrobenzoic acid ethyl ester. The preparation method includes the following steps that 1, nitrobenzoic acid and ethyl alcohol are added to a dissolution kettle, and the mixture obtained after dissolution is pumped into a fixed-bed reactor through a metering pump, wherein the fixed-bed reactor is pre-filled with an HY type solid acid catalyst, and the temperature of the fixed-bed reactor is controlled; 2, after the content of the material obtained after a fixed-bed reaction reaches the index, the material is pumped into a desolvation kettle, after desolvation, alkali washing and washing, cooling and dispersing, centrifuging and drying are conducted, and the product is obtained. The target product is obtained through the preparation method in which ultra-high solid acid serves as the catalyst and the fixed-bed reactor is used for continuous esterification, the problem that a large amount of waste acid and high-salinity wastewater is generated in existing industrial production is solved, and the emission of wastewater is greatly reduced.

The invention discloses an environment-friendly preparation process of N-(4-ethoxy carbonyl phenyl)-N'-methyl-N'-phenyl formamidine. The process comprises the steps of firstly, making p-nitrobenzoic acid be subjected to an esterification reaction and catalytic hydrogenation, obtaining ethyl p-aminobenzoate, then making ethyl p-aminobenzoate be subjected to two steps of condensation reactions, and obtaining N-(4-ethoxy carbonyl phenyl)-N'-methyl-N'-phenyl formamidine, wherein ethanol adopted in the esterification reaction is recycled and processed ethanol, and the recycled and processed ethanol is obtained by collecting, recycling and processing ethanol generated in the condensation reactions. According to the process, the ethanol generated in the condensation reactions are recycled and processed and then applied to the esterification reaction, production cost is lowered, environmental pollution is reduced, the process is an environment-friendly preparation process, and in particular, compared with absolute ethyl alcohol on the market, the ethanol recycled and processed through the process hardly has influence on the esterification effect.

The invention discloses a wash-resistant waterborne negative ion diatom ooze formula and a preparation method thereof. Diatomite, nano titanium dioxide, silicon acrylic emulsion, a dispersing agent, aphotoinitiator, aluminum triphosphate and deionized water are mixed according to a proportion; then extender pigment, sodium silicate, polyimide, fumed silica, ammonium polyphosphate temperature resistant additive, p-nitrobenzoic acid, an aliphatic series curing agent and asbestos powder are added to modify the materials; finally, negative ion powder, cellulose and bamboo carbon fiber are added to improve viscosity, so that produced diatom ooze has no toxic gas generation, environmental friendliness are achieved, and harm to the human body is reduced; the negative ion powder and rare earth compound can release a lot of negative ions, so that the density of the negative ions in space can be kept as 1,400 to 1,600 ion / CM<3>, and health of the human body is promoted; the diatom ooze has strong adsorption capacity and good breathability and can decompose toxic gas of formaldehyde and the like; the air humidity can be controlled between 50% to 60% which is the most comfortable range for the human body and is favorable for people to enter deep sleep.

The invention discloses a pesticide. The pesticide is composed of a main agent and an auxiliary agent. The ingredients of the main agent are: acetamiprid 10.0-20.0wt%, acephate 15.0-30.0wt%; the auxiliary agent Including 25.0-45.0wt% ethanol, 3.0-16.0wt% benzyl polyphenol polyoxyethylene ether, 2.0-10.0wt% Tween-80, 2.0-5.0wt% pyrrolidone, 1.0-4.0wt% p-nitrobenzoic acid, 0.5-4.0wt% propyl gallate, wherein the mass fraction of each substance is relative to the total mass of the pesticide. For the pesticide disclosed by the present invention, acetamiprid and acephate are mixed according to a suitable ratio, and suitable auxiliary agents are added as auxiliary agents, and pesticides in the forms of emulsifiable concentrate, microemulsion, and water emulsion can be prepared according to the usual methods. It has the characteristics of good insecticidal effect, long-lasting drug effect, and little harm to humans and other animals.

Relating to the field of chemical engineering, the invention in particular relates to a synthesis method of benzocaine. The method includes the steps of: synthesis of p-nitrobenzoic acid; synthesis of ethyl 4-nitrobenzoate; and synthesis of benzocaine. Through improvement of benzocaine synthetic experiment method, the invention specifically solves the problems of low yield, tedious reaction aftertreatment and the like in conventional preparation experiments, and the improved experimental operation method not only can achieve high yield preparation of benzocaine, enhance experimental efficiency, but also effectively improves the teaching effects of the experimental course, and is suitable for chemical experimental course teaching.

This invention relates to a process for preparing procaine, by using p-nitrobenzoic acid and diethylamino ethanol as raw materials, by esterification to produce nitrocaine, which is then reduced by reductant of hydrogenin xylene solvent with catalyst of nicket compound (Leininie) in suitable temp. and pressure to produce final product-procaine. Advantages are simple process, high transforming rate, high yield, high pureness, short process, reutilization of catalyst, no three wastes.

A stable engine coolant is prepared from raw materials in parts by weight as follows: 8-14 parts of dodecyl dimethyl betaine, 2-6 parts of coconut oil acid alkanolamide, 4-7 parts of polyoxyethylene laurylether phosphate, 3-7 parts of cinnamic acid, 2-4 parts of triethanolamine, 3.5-4.6 parts of p-nitrobenzoic acid, 13-26 parts of self-drying resin, 3-6 parts of a dispersing agent, 1.5-4.5 parts of a special aid, 2.5-3.6 parts of dodecyl diethanolamide, 23-36 parts of deionized water, 5-8 parts of propylene glycol, 4-7parts of loropetalum chinensis and 5-8 parts of sebacic acid. The stable engine coolant has the benefits as follows: the stable engine coolant is stable in cooling performance, can effectively prevent components of a cooling system from rusting and can effectively protect usage of an engine.