8 results about "Acetoacetanilide" patented technology

The invention relates to the technical field of rubber materials, and provides a flame-retardant rubber hose and a preparation method thereof. The flame-retardant rubber hose comprises an inner rubber layer, a reinforcing layer and an outer rubber layer, and raw materials of the inner rubber layer and the outer rubber layer respectively and independently comprise the following components in parts by weight: 10-15 parts of MQ silicone rubber, 85-90 parts of nitrile rubber, 3-7 parts of 3-carboxyl-4-hydroxy-acetoacetanilide modified graphene, 35-45 parts of filler, 1-3 parts of an anti-aging agent, 5-10 parts of a plasticizer, 2-5 parts of an activating agent, 1-2 parts of a vulcanizing agent and 0.5-1.5 parts of an accelerant. According to the technical scheme, the problem that the rubber hose in the prior art is insufficient in mechanical property and flame retardant property is solved.

This invention relates to the field of wastewater treatment technology. It discloses a wastewater treatment system for acetoaniline, comprising a shell, a liquid supply mechanism, and a recovery mechanism. The temperature control partition plate near the rectangular adsorption treatment unit is provided with a heating zone, a cooling zone, and a traction rail. The cooling zones are staggered along the X-axis. The rectangular adsorption treatment unit is driven to slide back and forth along the X-axis by the traction rail, and several rectangular adsorption treatment units distributed along the Y-axis slide back and forth alternately. This shortens the temperature change time between the initial and high-efficiency periods, thereby increasing the high-efficiency time interval and controlling the movement reaction rapidly. It is suitable for applications with high concentrations and high toxicity of organic matter, ensuring that the entire adsorption treatment system remains in a state of high-efficiency adsorption and desorption, improving adsorption effect and efficiency within the same time period and adsorption volume.

The invention relates to the technical field of aniline preparation, in particular to a method for preparing acetoacetanilide through electrochemical selective debromination. The method comprises the following steps: (1) taking a sulfuric acid aqueous solution as an anolyte, taking an organic alkali aqueous solution as a catholyte, putting bromoacetoacetanilide as a reaction raw material into the catholyte, uniformly mixing, and carrying out electrolysis debromination to obtain a suspension; (2) adjusting the pH value of the suspension to be acidic, separating to obtain a solid and an acid solution, washing the solid with water, and drying to obtain a white filter cake, namely acetoacetanilide; and (3) carrying out electrodialysis dissociation on the acid liquor obtained in the step (2) to respectively obtain organic alkali and recovered acid liquor. The acetoacetanilide is prepared by taking the bromoacetoacetanilide as the raw material, so that the method is environment-friendly and convenient to use, and has value in both the angle of green chemistry and the economical efficiency.

The application provides a kind of catalyst recyclable carboxin synthesis method, belong to organic synthesis technical field, comprising: the condensation reaction of alpha-chloroacetyl acetanilide and 2-mercaptoethanol under alkaline conditions, intermediate is obtained by separation;With toluene as solvent, the obtained intermediate is mixed with ionic liquid catalyst to form a reaction system, heating reaction, after the reaction is completed, the temperature of the reaction system is reduced to 5-25 DEG C, the reaction system is layered, then separation treatment is carried out, carboxin product and separated ionic liquid catalyst are obtained, then the separated ionic liquid catalyst is regenerated by dehydration and recycled;Wherein, the ionic liquid catalyst is 1-(polyethylene glycol monomethyl ether group)-3-(3-sulfopropyl) imidazole hydrogen sulfate salt.The reaction system has homogeneous high-efficiency conversion at high temperature and automatic separation at low temperature, which realizes the green upgrading of carboxin synthesis process.

The invention provides carboxin synthesis equipment, and relates to the technical field of carboxin synthesis, the carboxin synthesis equipment comprises a graphite tubular reactor used for synthesizing a carboxin intermediate, the graphite tubular reactor comprises a chlorine inlet and a liquid inlet, the chlorine inlet is formed in the side wall of the graphite tubular reactor, and the liquid inlet is formed in the side wall of the graphite tubular reactor; the liquid inlet is formed below the chlorine inlet and is used for conveying an acetoacetanilide raw material; the synthesis kettle is communicated with a bottom pipeline of the graphite tubular reactor and comprises a feeding port, and the feeding port is used for feeding mercaptoethanol, an acid-binding agent and a catalyst. The device is reasonable in structure, reduces the waste treatment burden, saves the cost and facilitates industrial production.

The invention discloses acetoacetanilide refining equipment and a process thereof. The acetoacetanilide refining equipment comprises a mounting platform, a control module, a reaction mechanism, an injection module, an accurate dropwise adding module and a material adding module, the control module is mounted at the top of the mounting platform; the reaction mechanism is embedded in the middle of the inner side of the mounting platform; the injection module is arranged at the top end of the mounting platform and located on the right side of the reaction mechanism, and the injection module is electrically connected with the control module; the accurate dripping module is arranged at the top end of the mounting platform and is positioned on the rear side of the reaction mechanism; according to the acetoacetanilide refining equipment and the acetoacetanilide refining process, the reaction container is movably connected with the heating part, so that the reaction container and a heat source can be quickly separated from each other when the acetoacetanilide is heated and then cooled in the acetoacetanilide refining process; the temperature in the reaction container is quickly reduced, and the acetoacetanilide refining efficiency is improved.

The present application relates to the technical field of aniline preparation, in particular to a method for electrochemically selectively debrominating to prepare acetoacethylaniline. The method comprises the following steps: (1) using sulfuric acid aqueous solution as an anode liquid, using organic alkali aqueous solution as a cathode liquid, putting bromoacetoacethylaniline as a reaction raw material into the cathode liquid, mixing uniformly, electrolyzing to debrominate, and obtaining a suspension; (2) adjusting the pH value of the suspension to be acidic, separating to obtain a solid and an acid liquid, and the white filter cake obtained after the solid is washed with water and dried is acetoacethylaniline; (3) performing electrodialysis dissociation on the acid liquid obtained in step (2) to obtain organic alkali and recovered acid liquid respectively. The present application uses bromoacetoacethylaniline as a raw material to prepare acetoacethylaniline, is environmentally friendly and convenient to use, and has value from the perspective of green chemistry and economy.

The invention provides a carboxin synthesis method, and belongs to the technical field of organic synthesis, the carboxin synthesis method comprises the following steps: S1, dissolving acetoacetanilide in an organic solvent to form a feed liquid; s2, the feed liquid is introduced into a reactor, chlorine is introduced for a chlorination reaction, and a chlorinated product is obtained; and S3, carrying out a condensation reaction on the chloro compound and mercaptoethanol under an alkaline condition, separating a water layer, adding a catalyst, carrying out a reflux dehydration cyclization reaction, and crystallizing and purifying after the reaction is finished, so as to obtain carboxin. According to the method disclosed by the invention, chlorine is adopted to replace sulfuryl chloride as a chlorination reagent, so that the problems of high three wastes and high cost in carboxin synthesis in the prior art are solved, the cleanliness of a carboxin synthesis process is improved, and the comprehensive production cost of carboxin is reduced.