84 results about "Chloroacetic acids" patented technology

The invention provides nano cellulose as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) carrying out heating reaction on a mixed solution containing a biomass material and a eutectic solvent, and filtering to obtain fibers; (2) mixing the fiber with a solvent, and performing ultrasonic treatment to form the nano cellulose; wherein the eutectic solvent comprises a hydrogen bond donor and a hydrogen bond acceptor, the hydrogen bond donor is selected from 2-aldehyde acetic acid and / or chloroacetic acid, and the hydrogen bond acceptor is selected from choline chloride. The preparation method provided by the invention can effectively reduce the cost and energy consumption for synthesizing the nano cellulose.

The invention discloses a preparation method of 3-quinuclidinone hydrochloride, which comprises the following steps: carrying out temperature control reaction on 4-picolinic acid and chloroacetic acid under alkaline water conditions to obtain an aqueous solution of a compound a, and directly entering the next reaction without post-treatment after the reaction is finished; adding a reducing agent alkaline water system into the aqueous solution of the compound a, controlling the temperature to react, controlling the temperature to adjust the pH value to 5-5.5 after the reaction is finished, extracting with n-butyl alcohol, and drying to obtain an n-butyl alcohol solution of a compound b, and directly entering the next reaction step; wherein the reducing agent is one of sodium borohydride and potassium borohydride; dropwise adding thionyl chloride into an n-butyl alcohol solution of the compound b, controlling the temperature to react after dropwise adding is ended, and concentrating to remove the solvent and unreacted thionyl chloride after the reaction is ended, so as to obtain a compound c; carrying out Dieckmann condensation reaction on the compound c at controlled temperature under the condition of organic alkali by using toluene as a solvent, carrying out hydrochloric acid quenching reaction after the reaction is finished, and directly carrying out next-step reaction after extracting and removing impurities from a water phase containing a hydrochloride solution of a compound d by using toluene; and carrying out a decarboxylation reaction on the compound d in a hydrochloric acid aqueous solution at controlled temperature, after the reaction is finished, adjusting the pH value to 10-13, extracting, and salifying to obtain a target compound TM, namely 3-quinuclidinone hydrochloride. The preparation method of 3-quinuclidinone hydrochloride provided by the invention has the advantages of economical and easily available raw materials, mild reaction conditions, efficient reaction, simple operation and low cost, and is suitable for industrial application.

This invention provides a continuous method for preparing high-purity creatine monohydrate, comprising the following steps: a) adding chloroacetic acid aqueous solution dropwise to an aqueous methylamine solution, stirring at room temperature for 2 hours after the addition is complete; b) heating to 50-60°C and holding for 1 hour to remove most of the methylamine, then heating to 95°C to evaporate the methylamine aqueous solution for 1 hour; c) adding sodium hydroxide solution dropwise to the solution from step b) at 95°C, then heating to 105°C and concentrating under reduced pressure for 1.5 hours to approximately half the original volume, obtaining a creatine solution with a concentration of 30%-40%; d) cooling the solution from step c) to 40-60°C and adding a catalyst; e) drying to obtain pure creatine monohydrate. This invention reduces the methylamine equivalent, saving costs, and eliminates the need for purifying creatine for direct use in the next reaction; it can simultaneously lower the system reaction temperature and pH value to inhibit the formation of byproducts dicyandiamide and creatinine, and eliminates the need for debittering agents for purification and debittering, thus saving production costs.

The invention belongs to the technical field of glycine preparation, and particularly discloses a preparation method of glycine. The method comprises the following steps: controlling the reaction temperature, efficiently synthesizing ammonium chloroacetate from chloroacetic acid and liquid ammonia in a reactor, carrying out catalytic ammonolysis on the ammonium chloroacetate and ammonia gas in a reactor filled with a solid catalyst to realize continuity and reinforcement of the process, and carrying out alcohol precipitation crystallization, separation and purification to obtain glycine. The solid catalyst provided by the invention has the advantages of simple preparation, reproducibility, long service life, no metal pollution, easily available raw materials, controllable cost, long-acting cyclic utilization, high efficiency, simple recovery and the like; the method for preparing glycine by using the solid catalyst solves the problems of high consumption, high recovery cost, low production and purification efficiency and pollution caused by the traditional catalyst, and is a key technology for green and low-cost industrial production of glycine.

The utility model relates to a chloroacetic acid production device for processing glycine, which is characterized in that an interlayer is arranged in the outer wall of a chlorination kettle, the side end is connected with a liquid level meter a, and a discharge pipe is arranged on the lower surface; a radar liquid level instrument, a chlorine feeding pipe, an on-line component analyzer, an on-line thermometer, an on-line hydrometer, a condensation pipe, a catalyst filling pipe and an acetic acid feeding pipe are sequentially arranged on the upper surface, the lower end of the chlorine feeding pipe is connected with a gas distributor, and the condensation pipe is externally connected with a condenser; the catalyst filling pipe is externally connected with a catalyst metering tank; a liquid level meter b is connected to the side end of the kettle body, a discharging pipe is arranged on the lower surface of the kettle body, a water supplementing pipeline is connected to the right side of the upper surface of the kettle body, a liquid inlet pipe and an online moisture measuring device are arranged on the left side of the upper surface of the kettle body, and the liquid inlet pipe is communicated with the discharging pipe; the upper end of the stirrer is connected with a stirring motor, and the lower end is connected with a frame-type stirring paddle; the utility model has the advantages of reasonable structural design and good use effect.

The application provides a preparation method of a rare earth metal adsorption and separation resin and a resin extraction column. The preparation method comprises the following steps: adding an oil phase composed of styrene, divinylbenzene, a pore former and an initiator into an aqueous phase containing a dispersant and an inorganic salt to perform suspension polymerization, so as to obtain a white ball resin; performing phthalimide and hydrolysis on the white ball resin, so as to obtain a primary amine resin; performing reaction on the primary amine resin with chloroacetic acid and an alkaline medium, so as to perform carboxymethylation on part of the primary amine sites; and performing reaction on the obtained intermediate resin with phosphorous acid, formaldehyde and an acidic medium, so as to perform phosphonic acid methylation on the remaining part of the primary amine sites. The white ball resin is first subjected to amination, and then part of the carboxymethylation and part of the phosphonic acid methylation are sequentially performed, so that the carboxyl type chelation sites and the phosphonic acid type chelation sites are simultaneously reserved in the same resin bead, thereby being beneficial to improving the comprehensive adsorption performance and separation performance of the resin on the rare earth metal.

This invention discloses a rice straw-based liquid mulch film emulsion, its preparation method, and its application. The preparation method includes: treating pretreated rice straw with an alkaline solution in sodium hydroxide to obtain rice straw fibers and a silicon-containing black liquor; washing and bleaching the rice straw fibers to obtain bleached rice straw fibers; allowing the silicon-containing black liquor to stand, adjusting the pH value, and allowing it to stand again to obtain a silicon-containing dispersion; mixing and activating the bleached rice straw fibers with an alkaline alcohol solution, followed by etherification with chloroacetic acid to obtain carboxymethyl cellulose; mixing polyvinyl alcohol and carboxymethyl cellulose solutions, adding the silicon-containing dispersion under stirring, and then adding water to obtain the rice straw-based liquid mulch film emulsion. The rice straw-based liquid mulch film emulsion prepared by this invention can be used for soil covering in cultivated soils, exhibiting excellent film-forming strength, toughness, light-blocking properties, and soil cover adaptability. It has a wide range of raw material sources, a simple preparation process, and is suitable for large-scale promotion.

The utility model discloses a cleaning system for industrial glycine dirty materials by chloroacetic acid ammonolysis, which comprises a vibrating screening machine, a material dissolving tank, a clarifying tank and a crystallizing kettle which are sequentially connected through pipelines, the material dissolving tank is of a cylindrical structure, a stirring device is arranged in the material dissolving tank, a water inlet is arranged at the top of the material dissolving tank, a jacket is arranged on the outer side of the material dissolving tank, and the crystallizing kettle is arranged in the jacket. A steam inlet and a steam outlet are formed in the jacket, a liquid level transmitter and a temperature transmitter are arranged in the material melting tank, the bottom of the vibrating screen machine is connected with a feeding port of the material melting tank, a discharging port in the bottom of the material melting tank is connected with a feeding port in the top of the clarifying tank, and a filter is arranged on a connecting pipeline of the clarifying tank and the crystallization kettle. According to the method, different types of glycine dirty materials can be effectively cleaned, impurities in the different types of glycine dirty materials can be effectively removed, a pure glycine product is obtained, and recycling of resources is achieved.

The invention belongs to the technical field of acyclic compounds, and particularly relates to a method for preparing chloroacetic acid by hydrogenation reduction of dichloroacetic acid, which comprises the following steps: A1, adding a chlorination liquid containing dichloroacetic acid into a raw material storage tank, mixing with hydrogen, and heating to obtain a mixed material; a2, conveying the mixed material into a hydrogenation reactor loaded with a composite metal modified catalyst for reaction to obtain chloroacetic acid liquid and mixed gas; and A3, conveying the mixed gas to a stripping tower, condensing the mixed gas through a condenser to obtain hydrogen chloride gas and condensate, and conveying the condensate to the hydrogenation reactor again for recycling. According to the method disclosed by the invention, a byproduct, namely the chlorination liquid, generated in a chlorination reaction in a chloroacetic acid production process is used as a reaction raw material, dichloroacetic acid and trichloroacetic acid in the chlorination liquid can be effectively reduced into chloroacetic acid, and other substances in the chlorination liquid cannot be influenced.

The invention discloses a high-wettability and strong-adhesion cross-linking enhanced dust fall material. The dust fall material comprises the following raw materials in parts by mass: 2-5 parts of pullulan, 2-5 parts of agarose, 5-15 parts of sodium hydroxide, 5-15 parts of chloroacetic acid, 5-15 parts of ethylene glycol diglycidyl ether, 3-11 parts of malic acid, 5-10 parts of a water-retaining agent, 5-10 parts of diluted hydrochloric acid and 1000-2500 parts of distilled water. The dust falling material has high wettability and strong adhesion, and can effectively settle coal dust in air; meanwhile, a coal dust consolidation layer formed after the dust falling material is sprayed is high in strength, reentrainment of dust can be effectively prevented, and the technical problems that the dust falling material is poor in dust falling effect, single in function and the like are solved.

The invention provides a bagasse nanocellulose-based antibacterial composite film as well as a preparation method and application thereof, and belongs to the technical field of food packaging materials. The preparation method comprises the following steps: sequentially carrying out alkali treatment, bleaching treatment and acid treatment on bagasse to obtain bagasse microcrystalline cellulose; the preparation method comprises the following steps: reacting bagasse microcrystalline cellulose, absolute ethyl alcohol and chloroacetic acid, and shearing after the reaction is finished, so as to obtain chloroacetic acid grafted and modified bagasse nano cellulose; dispersing konjac glucomannan in water to obtain a konjac glucomannan dispersion liquid, then adding citrus essential oil and bagasse nanocellulose into the konjac glucomannan dispersion liquid to carry out a secondary reaction, adding a plasticizer after the reaction is finished, and adjusting the pH value with citric acid to obtain a film forming liquid; and drying the film forming liquid to obtain the bagasse nano cellulose based antibacterial composite film. The antibacterial composite film prepared by the invention has excellent tensile strength, water vapor permeability and antibacterial activity, and can be used for monitoring the freshness of high-protein food.

The utility model discloses a system for recycling chloroacetic acid by dechlorinating dichloroacetic acid through photocatalysis, which relates to the technical field of chloroacetic acid synthesis equipment and comprises a collecting tank I used for collecting mother liquor containing dichloroacetic acid during preparation of chloroacetic acid, and the collecting tank I is sequentially connected with a plurality of stages of condensers and a filter I through pipelines. A filtrate outlet I of the filter I is sequentially connected with a storage tank, a photocatalytic reaction kettle, a plurality of stages of condensers and a filter II; a filtrate outlet II of the filter II is connected with the storage tank through a reflux pipeline; stirring mechanisms are arranged in the collecting tank I and the photocatalytic reaction kettle, an ultraviolet visible light lamp is mounted in the photocatalytic reaction kettle, a material inlet of the photocatalytic reaction kettle is connected with a mother liquor supply pipeline, a water supply pipeline, a catalyst supply pipeline and a hydrogen supply pipeline, and the collecting tank I is connected with a nitrogen pipeline. The yield of chloroacetic acid prepared by an acetic anhydride catalysis method is improved, the generation of waste liquid is reduced, and the treatment cost of wastewater is reduced.

The invention relates to the field of macromolecules, and discloses a method for refining polyetherketoneketone and a polyetherketoneketone refined product. The method comprises the following steps: (1) treating a polyetherketoneketone complex by adopting a pretreatment agent; (2) the polyether ketone ketone crude product and a mixed chain supporting solution are mixed and washed, a first product is obtained, the mixed chain supporting solution comprises a main chain supporting agent and a cosolvent, the main chain supporting agent comprises one or more selected from parachlorophenol, trifluoroacetic acid, difluoroacetic acid, dichloroacetic acid and chloroacetic acid, the cosolvent comprises one or more selected from N, N-dimethylformamide and dimethyl sulfoxide, and the main chain supporting agent comprises one or more selected from dichlorophenol, trifluoroacetic acid, difluoroacetic acid, dichloroacetic acid and chloroacetic acid. The solvent is one or more of water, N-methyl pyrrolidone and N-methyl formamide; (3) adding a mixed aqueous solution into the first product to remove at least part of metal ions to obtain a second product; and (4) washing the second product for multiple times by using an organic solvent, and washing and drying to obtain the refined polyether ketone ketone. The content of aluminum ions in the polyetherketoneketone prepared by the method is low.

The invention discloses a biosynthesis process of creatine monohydrate, and belongs to the technical field of bioengineering. The invention discloses a creatine monohydrate biosynthesis method, which is characterized in that sarcosine invertase is utilized to catalyze chloroacetic acid and monomethylamine to generate N-alkylation reaction so as to prepare sarcosine, and then creatine monohydrate is generated under the catalysis of the creatine invertase, the process is mild in reaction condition, the temperature is 25-37 DEG C, the pH is 6.0-8.0, the energy consumption is lower, the conversion efficiency is high, the environment is protected, and the economical efficiency is high. The invention provides a new synthesis method for sustainable synthesis of creatine monohydrate, and provides a new idea for industrial production of creatine monohydrate.

The invention relates to the technical field of unqualified product treatment equipment, in particular to an unqualified product chloroacetic acid waste dissolving tank and a working method.The unqualified product chloroacetic acid waste dissolving tank comprises a dissolving tank body, a stirring device and a temperature control device.The dissolving tank body is provided with a feeding port and a discharging port, and the stirring device comprises a stirring shaft sleeve, stirring blades and a motor; the temperature control device comprises a heating jacket arranged outside the dissolving tank body in a sleeving mode, a connecting pipeline communicated with a heat source is arranged on the heating jacket, the temperature control device further comprises a temperature sensor, the detection end of the temperature sensor is located in the dissolving tank body, and the temperature sensor is in signal connection with the heat source through a controller. According to the technical scheme, chloroacetic acid waste and a solvent are fully contacted and mixed through the stirring device, the dissolving speed is greatly increased, the temperature control device ensures that the temperature in the dissolving tank body is stabilized in a proper dissolving temperature range, and effective treatment and recycling of unqualified chloroacetic acid waste are achieved.

The invention relates to a quaternary ammonium salt collecting agent for reverse flotation of refractory hematite at room temperature and application of the quaternary ammonium salt collecting agent, the quaternary ammonium salt collecting agent is structurally a cationic compound with an ester group, n-caprylic alcohol and chloroacetic acid react to obtain octyl chloroacetate, and then the octyl chloroacetate reacts with tertiary amine. The molar ratio of n-caprylic alcohol to chloroacetic acid is 1: (1.05-1.15), the reaction temperature is 80-90 DEG C, and the reaction time is 7-9 hours; the molar ratio of the octyl chloroacetate to the tertiary amine compound is 1: (1.1-1.3), the reaction temperature is 70-90 DEG C, and the hematite room-temperature reverse flotation quaternary ammonium salt collecting agent is obtained by reacting in an acetonitrile solvent for 2-6 hours. The quaternary ammonium salt collecting agent with the ester group is independently applied to room-temperature reverse flotation of the refractory hematite.

The utility model discloses a hydrogen chloride removal system suitable for a process of producing chloroacetic acid by an acetic acid method, and belongs to the technical field of glycine production. The hydrogen chloride removal system comprises a separation kettle, a condenser, a packing absorption tower and an acetyl chloride recovery tank, the separation kettle is connected with the chlorination reaction kettle, and the separation kettle is connected with the condenser; the condenser is connected with the separation kettle through a return pipe, a non-condensable gas outlet on the condenser is connected with the packing absorption tower through a non-condensable gas outlet pipe, and a vacuum pump is arranged on the non-condensable gas outlet pipe; the packing absorption tower is connected with an acetic acid inlet pipe, an upper gas phase outlet of the packing absorption tower is connected with a tail gas treatment system, and the packing absorption tower is connected with an acetyl chloride recovery tank through an acetyl chloride outlet pipe; the acetyl chloride recovery tank is connected with the chlorination reaction kettle through a recycling pipe and is also connected with the packing absorption tower through a circulating pipe. Acetyl chloride in a chloroacetic acid finished product is recovered and used for a chlorination process, so that the consumption of raw material acetic anhydride is reduced; and meanwhile, the loss amount of raw material liquid ammonia in the subsequent ammoniation process is reduced.

This invention discloses a cross-linked carboxymethyl corn starch adsorbent, its preparation method, and its application. The method involves first mixing corn starch with 85%-95% ethanol (by mass) and stirring until homogeneous; adjusting the pH of the starch emulsion to 10-12, preheating at 50-60°C, adding 0.1%-0.15% epichlorohydrin (by dry starch weight), and continuously stirring for 1-2 hours; after cooling to room temperature, adding solid sodium hydroxide for alkalization, adding chloroacetic acid to the alkalized system, and reacting at 50-60°C for 2-4 hours; after the reaction, adjusting the pH of the reaction system to 6-7, filtering, washing, drying, and sieving to obtain the cross-linked carboxymethyl corn starch adsorbent. This invention overcomes the defects of poor structural stability and low adsorption capacity of unmodified starch. The resulting adsorbent is environmentally friendly, has excellent adsorption performance, and the preparation process is simple, controllable, and low-cost.

The invention belongs to the technical field of refractory materials, and particularly relates to a high-temperature-resistant anti-erosion refractory brick, a preparation method and application to a kiln. The preparation method of the high-temperature-resistant anti-erosion refractory brick comprises the following steps: reacting polyvinyl alcohol with chloroacetic acid to prepare carboxymethylated polyvinyl alcohol; the preparation method comprises the following steps: reacting polyethylene glycol diglycidyl ether with acrylic acid to prepare polyethylene glycol acrylate glycidyl ether, and reacting polyethylene glycol acrylate glycidyl ether with carboxymethylated polyvinyl alcohol to prepare modified polyvinyl alcohol; reacting the modified polyvinyl alcohol with maleic anhydride to prepare a modified organic binder; mixing and stirring the modified organic binder with water, an initiator solution, bauxite aggregate, bauxite fine powder, silicon nitride, Portland cement, river sand and polypropylene fiber to obtain mixed slurry, and pouring, compacting and curing to obtain the high-temperature-resistant and anti-erosion refractory brick. The refractory brick has good mechanical strength and wear resistance, and has strong high temperature resistance and erosion resistance.

The invention discloses efficient deep penetration acid liquor as well as a preparation method and application thereof. The efficient deep penetration acid liquor comprises the following components in parts by mass: 20-35 parts of a main acid agent, 5-15 parts of a penetration enhancer, 2-6 parts of a corrosion inhibitor, 2-5 parts of a stabilizer and 40-70 parts of deionized water, wherein the main acid agent is a compound of main acid and auxiliary acid, and the penetration enhancer is a compound of fatty alcohol-polyoxyethylene ether and sodium lauroyl sarcosinate. Main body acid (one or two of sulfamic acid and chloroacetic acid) and auxiliary acid (one or two of formic acid and acetic acid) are compounded to serve as a main acid agent, and the main acid agent is combined with a penetration enhancer compounded by fatty alcohol-polyoxyethylene ether and sodium lauroyl sarcosinate, a corrosion inhibitor and a stabilizer. The core goals of deep penetration and low corrosion are jointly achieved, and the method can be applied to various scenes such as soil improvement, oil and gas exploitation and industrial equipment cleaning in a cross-field mode.

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a preparation method of tetrasodium glutamate diacetate. The preparation method comprises the following steps: (1) dissolving sodium glutamate with deionized water, and then adding a sodium hydroxide solution for neutralization to obtain a disodium glutamate solution; (2) dissolving chloroacetic acid with deionized water, and adding a sodium hydroxide solution for neutralization to obtain a sodium chloroacetate solution; and (3) mixing the disodium glutamate solution obtained in the step (1) with the sodium chloroacetate solution obtained in the step (2), carrying out a condensation reaction under gradient temperature and alkaline conditions, after the condensation reaction is completed, continuing heating to carry out a hydrolysis reaction, and after the reaction is completed, carrying out vacuum concentration, filtering and desalting to obtain the tetrasodium glutamate diacetate solution. Through gradient control of temperature and alkaline reaction conditions, the synthesis efficiency of the tetrasodium glutamate diacetate can be remarkably improved, and the product quality can be improved.

The application discloses a novel fluorocarbon betaine surfactant and a preparation method thereof, and belongs to the field of surfactant synthesis and application. The preparation method comprises the following steps: (1) adding perfluorohexyl ethyl alcohol and tetrahydrofuran into a reaction container, adding sodium hydride, and then adding chloroacetic acid methyl ester drop by drop; after reaction at a high temperature, an intermediate 1 is obtained; (2) adding N,N-dimethyl-1,3-propanediamine into the intermediate 1, and then performing reaction at a high temperature to obtain an intermediate 2; (3) adding a solvent and a sodium salt into the intermediate 2, and then performing reaction at a high temperature of 70-90 DEG C to obtain the novel fluorocarbon betaine surfactant. The novel fluorocarbon betaine surfactant does not contain perfluorooctanoic acid (PFOA) and perfluorohexane sulfonic acid (PFHxS) substances, is green and environment-friendly, has a small influence on the environment, does not have influences on human reproduction, development and immune system, can effectively stabilize foam, is resistant to high temperature, and can improve the fire extinguishing performance of a foam fire extinguishing agent. In the aspect of oil displacement agents, the novel fluorocarbon betaine surfactant can reduce oil-water interfacial tension, stabilize emulsions and improve the recovery efficiency of crude oil.

This invention discloses a heat transfer ink, its preparation method, and its application. The heat transfer ink comprises the following components in parts by weight: 3-15 parts of polymer material, 6-45 parts of pigment, 0.5-10 parts of additives, and 50-85 parts of solvent. The polymer material includes chloroacetic acid resins, polymers, and cellulose materials. The chloroacetic acid resin is selected from at least one of ternary chloroacetic acid resins, ternary hydroxyl chloroacetic acid resins, and ternary carboxyl chloroacetic acid resins. The cellulose material is selected from at least one of ester cellulose and ether cellulose. The benzene-free and ketone-free ink of this invention retains good fineness, viscosity, and low solvent residue, and does not contain harmful ketone and benzene solvents, making it more environmentally friendly and safer. It can make heat transfer printed products completely odorless, meeting higher requirements.

The invention belongs to the technical field of adsorption materials, and particularly relates to a preparation method and application of a high-entropy adsorption material. The method comprises the following steps: dissolving soluble salts of three or more divalent ions and two or more trivalent ions in water to prepare a high-entropy stock solution; the method comprises the following steps: adjusting the pH value of a diethylenetriamine aqueous solution with a sodium hydroxide solution under stirring, then slowly adding a chloroacetic acid aqueous solution, and continuously stirring for reaction to obtain a modified solution; the preparation method comprises the following steps: soaking spanishneedles herb or bone sponge powder in a modification solution to obtain a modified carrier material, adding the modified carrier material into a high-entropy stock solution, adding a mixed aqueous solution of sodium hydroxide and sodium carbonate as a precipitator, reacting, and carrying out suction filtration to obtain a precipitate and a filtrate; and washing the precipitate with a diethylenetriamine pentaacetic acid solution, drying, and grinding to finally obtain the high-entropy adsorption material. The material has high chlorine adsorption performance, and can be applied to the fields of wastewater adsorption chlorine, fluorine, molybdenum and chromium ion treatment and the like.

The invention provides a preparation method of ammonium carboxymethyl cellulose as well as a product and application of the ammonium carboxymethyl cellulose, the preparation method comprises the following steps: (1) sequentially carrying out acid treatment on a natural cellulose raw material, inoculating a white rot fungus inoculant for fermentation, carrying out steam explosion, and washing to obtain a cellulose crude product; (2) mixing the cellulose crude product, a strong base, an organic solvent and water, and carrying out an alkalization reaction; then mixing with chloroacetic acid, regulating and controlling Hansen solubility parameters, and carrying out etherification reaction; and finally, mixing with an ammonium reagent, carrying out neutralization reaction, carrying out solid-liquid separation, and collecting solids to obtain the ammonium carboxymethyl cellulose. The etherification reaction is carried out by regulating and controlling Hansen solubility parameters, the complex acidification washing step can be abandoned, the ammonium reagent is directly added, the ammonium carboxymethyl cellulose with the soil improvement performance is obtained in one step, the reaction steps are simplified, the process time is shortened, and the production cost is reduced.

The invention relates to the technical field of natural substance modification, and particularly discloses gallic acid grafted carboxymethyl tremella powder as well as a preparation method and application thereof. According to the method, tremella powder is directly used as a raw material, and modification is achieved through two-step reaction, specifically, firstly, the tremella powder and chloroacetic acid are subjected to a carboxymethylation reaction under the alkaline condition, then the tremella powder and gallic acid are subjected to a grafting reaction under the mild condition, and the gallic acid grafted carboxymethyl tremella powder is obtained. According to the method, by controlling reaction conditions, the structural integrity of natural tremella is kept, meanwhile, efficient grafting of gallic acid and a tremella polysaccharide skeleton is achieved, the excellent characteristics of tremella polysaccharide and the oxidation resistance of gallic acid are organically combined, the water solubility, oxidation resistance and stability of the tremella polysaccharide are all remarkably improved, and the method is suitable for industrial production. The method has a good application prospect in the fields of anti-oxidation products such as cosmetics, functional foods and medical materials.

The utility model discloses a chloroacetic acid circulating cooling device which comprises a box body, the front side of the box body is rotatably connected with a sliding door through a hinge, the upper end of the box body is provided with a feeding port, the upper end and the lower end of the box body are both provided with rotating joints, the adjacent sides of the two rotating joints are both communicated with vertical pipes, and the vertical pipes are communicated with a water tank. A first disc is fixedly connected to the lower end of the vertical pipe located on the upper portion, two pneumatic rods are fixedly connected to the lower end of the first disc, a second disc is arranged at the lower ends of the two pneumatic rods, a third disc is arranged at the upper end of the vertical pipe located on the lower portion, and the adjacent sides of the second disc and the third disc are jointly and fixedly connected with a coil pipe. And the coil pipe is made of a polyethylene material. Through unique structural design and component selection, the cooling efficiency can be effectively improved, different working condition requirements are met, components are convenient to maintain and replace, and wide application prospects are achieved.

This invention relates to a methyl chloroacetate synthesis system, belonging to the technical field of chemical production. The methyl chloroacetate synthesis includes an esterification tower, which comprises a tower body A. The top of tower body A has a first discharge point connected to a phase separator via a pipe A. A first condenser is mounted on pipe A. The bottom of tower body A has a second discharge point connected to the inlet of a first reboiler via a pipe. The middle section of tower body A is an esterification zone, and the outer wall of the middle section of tower body A has a first feed point and a second feed point communicating with the esterification zone. This invention has the following advantages: the methyl chloroacetate synthesis system of this invention achieves methyl chloroacetate production at a relatively low cost, reducing methyl chloroacetic acid consumption and improving product quality and yield.

The invention relates to the technical field of waste gas treatment devices, and provides a waste gas treatment device for chloroacetic acid production, the waste gas treatment device for chloroacetic acid production comprises a treatment box installed on a support, and further comprises a liquid collecting box, a liquid collecting box, a box pulling assembly and a liquid scraping assembly, the bottom end of the liquid collecting box is hinged to an opening and closing plate through a hinge, and the opening and closing plate is hinged to the bottom end of the liquid collecting box; an opening and closing plate at the bottom end of the liquid collecting box is slidably installed at the inner bottom end of the treatment box through a plurality of sliding blocks, the liquid collecting box is installed on the side face of the support through a supporting frame, the box pulling assembly is arranged on the side face of the treatment box and used for pulling the liquid collecting box to the position above the liquid collecting box, and a liquid scraping assembly is arranged on the opening and closing plate. According to the waste gas treatment device for chloroacetic acid production provided by the invention, through / by virtue of / by utilizing the liquid collecting box, the liquid collecting box, the box pulling assembly and the liquid scraping assembly, the technical problem that in the prior art, when a sprayed solution is collected, a mode of using a pump body or pulling a collecting box is relatively troublesome is solved.

This utility model discloses an easy-to-clean resin processing discharge device, relating to the field of resin processing technology. It includes: a screening box; a screening mechanism disposed inside the screening box; a feed inlet disposed at the top of the screening box; a high-quality material discharge outlet disposed at the bottom center of the screening box; a coarse material discharge outlet disposed at the bottom side of the screening box; a support frame disposed at the bottom outer side of the screening box; a control panel disposed at the bottom side of the support frame; a water tank disposed at the top side of the support frame; a water pump disposed inside the water tank; collection boxes disposed at the bottom of both the high-quality material discharge outlet and the coarse material discharge outlet; a filter plate disposed at the center of one side of the collection box; and a disassembly mechanism disposed on one side of the filter plate. This utility model directly screens the finished chloroacetic acid resin during the discharge process, ensuring the product quality of the chloroacetic acid resin. Simultaneously, the rapid replacement and cleaning of the filter plate improves the overall water circulation quality and efficiency of the device.