344 results about "Sodium chloroacetate" patented technology

Synthesis of amphoteric soluble starch is carried out by taking starch as raw material, taking any kind from sodium chloroacetate, butanedioic anhydride and 3-chlorine-2-cysteic acid as anion reagent, taking any kind from 3-chlorine-2-hydroxypropyl trimethyl-ammonia chloride and N-(2,3-epoxide)trimethyl-ammonia chloride as cation reagent, catalyzing by composite catalyst, synthesizing the final product at 30-150 degree for 1-8hrs by semi-drying method. It' simple, cheap and efficient, has no after-treatment and waste ejection.

The invention discloses a method for preparing nanocellulose at low energy consumption. The method comprises the steps of soaking natural cellulose into a sodium hydroxide solution, and soaking at the temperature of 5-40 DEG C for 1-30 minutes to obtain a mixed solution; weighing sodium hydroxide and ethanol, and mixing sodium hydroxide and ethanol, then, adding the mixture into the mixed solution, heating the reactant to 50-78 DEG C while slowly stirring, then, adding sodium chloroacetate, reacting for 2.5-4 hours, then, filtering, and washing with distilled water until the solution is neutral to prepare treated cellulose; then, mixing the solution and water to prepare a cellulose mixed solution with the mass percentage of 0.5-1.4%; next, shearing under the mechanical action; and finally, filtering or carrying out centrifugal separation to prepare the nanocellulose. By using the method disclosed by the invention, the preparation time of the nanocellulose can be shortened to 3-4 hours, the yield is high, the consumption of a reaction reagent is low, the consumption of sodium chloroacetate is low, and the caused environment pollution is low; and the method is low in energy consumption, stable in process, good in repeatability, mild in condition, simple and convenient to operate and suitable for large-scale popularization.

The invention provides a method for preparing composite hydrogel through modifying bamboo shoot leftovers and an application of the composite hydrogel. An adsorption material is prepared by the steps of extracting cellulose from the bamboo shoot leftovers, then modifying by sodium chloroacetate, carrying out epoxy chloropropane cross-linking, followed by carrying out inverse suspension polymerization, and finally carrying out freeze drying. The prepared hydrogel beads are used as a bio-adsorbent, methylene blue is used as a dye model molecule, an adsorption effect on methylene blue is studied, and a theoretical foundation is laid for adsorption and sustained release of the hydrogel. The novel composite hydrogel prepared by utilizing the bamboo shoot processing waste leftovers is rich in raw material sources and low in cost, can achieve waste utilization, and promotes recycling economy; and the prepared hydrogel can be applied to adsorption of dye wastewater and adsorption and sustained release of a model drug, reduces pollution of bamboo shoot leftover arbitrarily discarding on the environment, and can play a certain role in promoting green development of ecological resources.

The invention relates to a nano-silver @MOF-5@ natural biological fiber multifunctional composite material integrating good bactericidal and hemostatic properties and chemical and biological warfare agent protective properties and a preparation method of the multifunctional composite material. The preparation method comprises the following steps: (1) impregnating natural biological fibers in a NaOH solution containing sodium chloroacetate, taking out the natural biological fibers and flushing the natural biological fibers by virtue of distilled water; (2) impregnating a material obtained in the step (1) alternately in a DMF solution of zinc acetate and a mixed solution of DMF of terephthalic acid and triethylamine in a circulating mode, and washing the material by virtue of DMF after each impregnating so as to obtain (MOF-5)n@ natural biological fibers through such alternate circulating precipitation; and (3) washing the material by virtue of a DMF solution, impregnating the material in CHCl3, and conducting vacuum drying; then impregnating the material in AgNO3 ethanol and water solution, conducting ultraviolet irradiation, flushing the material by virtue of de-ionized water and conducting vacuum drying. The multifunctional composite material disclosed by the invention is simple and easily controllable in preparation process, easily available in raw materials and low in production cost.

A dual alkyl carboxylate alkali-free oil-displacing agent composition and its use are disclosed. It consists of dual alkyl carboxylate and C14-18 mixed carboxylate 0.01-0.1wt%, C14-18 mixed carboxylic polyethenoxy ether, HPAM and water. The process is carried out by taking organic acid and sulfoxide chloride as raw materials, acyl chloride synthesizing, reacting ethylenediamine with sodium chloroacetate to synthesize intermediate sodium EDDA, and reacting it with acyl chloride to synthesize the final product. It has excellent oil-displacing effect.

The invention relates to a preparation method of aminated graphene. The preparation method comprises the following steps: synthesizing graphene oxide by means of a chemical oxidation process; adjusting the volume ratio of concentrated sulfuric acid and strong phosphoric acid to change the oxidizing degree of graphene oxide; then treating the graphene oxide with sodium chloroacetate to obtain carboxylated graphene; then adjusting the pH to 10-12 with ammonia water; performing a reaction on the carboxylated graphene and ammonia water to generate amidated graphene; then dehydrating the amidated graphene with phosphorus oxychloride to generate cyanated graphene; then performing catalytic hydrogenation to obtain the aminated graphene; and lyophilizing the obtained aminated graphene obtain aminated graphene powder. Through representation and detection, the content of amino in the aminated graphene is 15.0-25.0wt%. The preparation method provided by the invention is simple in process, and can be used for synthesizing aminated graphene with a high doping amount.

The invention relates to a foaming agent developed for foam drainage of a gas well, in particular to a fatty acid amide propyl betaine foam scrubbing agent as well as a preparation method and an application thereof. The fatty acid amide propyl betaine foam scrubbing agent is adaptable to the highly-mineralized and high-oil-bearing extreme environment with the mineralization degree higher than 25*10<4> mg/L and the content of condensate oil higher than 30%. According to the technical scheme, lauric acid, coconut fatty acid, oleic acid (cis-9-octadecenoic acid) and other fatty acids are added to a reactor in a certain mole ratio and have a condensation reaction with N,N-dimethyl-1,3-propane diamine at the temperature of 140-160 DEG C for 3-4 h, and an intermediate product, namely, long-chain alkyl tertiary amine, is obtained; the intermediate product and sodium chloroacetate have a nucleophilic substitution reaction at the temperature of 60-90 DEG C for 3-6 h, the content of free amine is tested to be smaller than 0.5%, fatty acid amide propyl betaine is obtained after the reaction, and fatty acid amide propyl betaine is a main agent of the foam scrubbing agent for the gas well. The prepared foam scrubbing agent has good foaming and foam stabilizing performance, foams carry a large quantity of liquids, and the foam scrubbing agent has excellent foam flooding performance in various extreme environments and has wide prospect.

The invention relates to soluble alginate/carboxymethyl carrageenan composite antibacterial fiber and a preparation method thereof. The soluble alginate/carboxymethyl carrageenan composite antibacterial fiber is characterized in that the soluble alginate/carboxymethyl carrageenan composite antibacterial fiber is prepared from a solution obtained from the mixing of soluble alginate, carboxymethyl carrageenan and a nano silver dispersion solution by adopting a wet spinning method, wherein the carboxymethyl carrageenan is obtained by carrying out a reaction on a carrageenan alkali liquor and sodium chloroacetate at 55-70 DEG C for 5-7 hours, cooling and purifying, and each raw material comprises the following components in percentage by weight: 19-94.5% of soluble alginate, 5-80% of carboxymethyl carrageenan and 0.5-1% of nano silver dispersion solution. The preparation method has wide raw material sources, and low cost; the technology is simple and convenient, and is good for popularization; and the prepared soluble alginate/carboxymethyl carrageenan composite antibacterial fiber has outstanding water absorption performance and mechanical performance, has good biocompatibility, and has higher bioactivity and antibacterial performances.

The invention discloses a method for preparing carboxymethyl modified starch, which uses non-crystallization granule state starch as a basis and a microwave method as a core, and combines a part of processes of a drying method and a solvent method. The method comprises the following steps : (1) mixing certain amount of pure water with 95 percent of ethanol; adding the starch at a stirring state, keeping stirring and keeping a reaction container to be obturated, maintaining the temperature of a reaction system, and stirring to react for several minutes; (2) crushing a filter cake at the stirring state, spraying the prepared sodium hydroxide solution to stir at 25 DEG C and react for several minutes, again spraying a sodium chloroacetate ethanol liquid after the reaction is finished, stirring and evenly mixing; (3) evenly spreading a reaction mixture and placing the reaction mixture in a microwave oven to irradiate for several minutes; (4) washing the reaction product after being irradiated by microwave with the ethanol and centrifuging; and (5) drying, pulverizing and screening to prepare the carboxymethyl modified starch. The carboxymethyl starch with high substitution degree prepared through the method has the advantages of high reaction efficiency, short reaction period and low reaction energy consumption.

The invention relates to soluble hemostatic gauze prepared from carboxymethylated solvent woven cellulosic fiber and preparation methods thereof. According to one method for preparing the soluble hemostatic gauze, the carboxymethylated solvent woven cellulosic fiber is respectively alkalized and etherified respectively by sodium hydroxide solution and sodium chloroacetate solution step by step. In addition, the invention further provides another method for preparing the soluble hemostatic gauze, wherein the carboxymethylated solvent woven cellulosic fiber is further alkalized and etherified in one step by a mixed solution of sodium hydroxide and sodium chloroacetate. According to the invention, the carboxymethylated cellulosic fiber with high transparency, high degree of substitution and high water-absorbing quality can be prepared at a low temperature, and the soluble hemostatic gauze provided by the invention can be prepared.

The invention provides a functionalized hollow mesoporous silica nano-microsphere, a preparation method thereof and application thereof in adsorption of heavy metal ions. A hollow mesoporous silica nano-microsphere is taken as a raw material and is aminated by virtue of a silane coupling agent, aminated nano-silica is bonded with sodium chloroacetate, and then nano-silica is grafted with two-tooth functional groups with a function of adsorbing metal ions. An inorganic-organic hybrid material has a large specific surface area, a hollow cavity and rich adsorption action sites in an organic side chain of the hollow mesoporous silica nano-microsphere and is capable of effectively separating multiple heavy metal ions, such as Cu<2+>, Cd<2+>, Ni<2+> and Pb<2+> in a relatively short time through dynamic and static adsorption. The functionalized hollow mesoporous silica nano-microsphere prepared by virtue of the preparation method has the beneficial effects that the raw materials are cheap and easily available, the process is simple, and the synthesis cost is low; and the functionalized hollow mesoporous silica nano-microsphere has hug application potentials in the field of treatment of heavy metal ion pollution in water bodies.

The invention discloses a making method of oil-condensing agent through leftover bits and pieces of leather in the making technical domain of oil-condensing agent, which comprises the following steps: (1)hydrolyzing the leftover bits and pieces of leather to extract collagen; (2)carboxymethylating the collagen: using sodium monochloracetate or chloroacetic acid to extract the collagen to modify; reducing the solubility of the collagen; controlling the molar rate of peptide bond of collagen and sodium monochloracetate or chloroacetic acid between 5: 3 and 5: 1 to control the modifying degree of the collagen; (3)acylachlorinating the collagen: using oil acylachlorine p-carboxy methylated collagen to modify; increasing the lipophilicity of the collagen; controlling the molar rate of peptide bond of collagen and oil acylachlorine between 5: 3 and 5: 1 to control the modifying degree of acylachlorinated collagen; (4)complexing to modify the product in the step (3).

The invention discloses a dication asphalt emulsifier. The molecular structure of the dication asphalt emulsifier is shown in the description, wherein when x is equal to 1, y is equal to 1 and i is equal to 0; when x is equal to 2, y is equal to 0, z is equal to 1 or 0, and i plus z is equal to 1. The dication asphalt emulsifier is prepared from the following raw material in molar ratio: 1 mol of N-Hydrogenated tallow-1, 3-diaminopropane, 6.00-13.00 mol of alcohols solvent, 1.02-3.05 mol of methyl acrylate, and 2.02-2.10 mol of sodium chloroacetate. The alcohols solvent adopts ethyl alcohol, methyl alcohol or isopropyl alcohol. The synthetic raw material of the dication asphalt emulsifier is easy to get, the production cost is low, the technology is simple, and high-temperature reaction is not required. Different types of asphalt can be emulsified, the prepared asphalt emulsifier is exquisite and uniform, the storage stability is good, dication emulsified asphalt can be prepared, and the dication asphalt emulsifier is applied to spreading of road penetrated oil layers or bonding oil as well as slurry surfacing and micro-surfacing parts, and has the characteristics of a medium breaking asphalt emulsifier and a slow breaking asphalt emulsifier.

The invention relates to a complex catalyst for viscosity reduction of thick oil by hydrothermal catalytic cracking and application thereof. The complex catalyst is prepared by the following steps of: 1) selecting raw materials: selecting 2 to 3 mass parts of C12-C18 aliphatic carboxylic acid, 1 to 2 mass parts of ethylene dimine, 3 to 5 mass parts of sodium fluoroacetate, 1 to 2 mass parts of sodium hydroxide, 3 to 5 mass parts of nickel chloride hydrate and 140 to 180 mass parts of toluene; and 2) mixing the C12-C18 carboxylic acid and ethylene dimine, then heating to 160 to 180 DEG C in an oil bath and reacting for 2 to 3 hours, cooling to 90 to 95 DEG C, adding sodium chloroacetate-containing aqueous solution, stirring, reacting for 40 to 50 minutes and then adding NaOH, continuously reacting for 10 to 13 hours at the temperature of between 90 and 100 DEG C, finally adding the NiCl2.6H2O and the toluene, refluxing and splitting water for 3 to 5 hours and filtering, and performing reduced pressure desolvation on the filtrate to obtain the catalyst, wherein after the reaction is finished, the viscosity reduction rate of the thick oil reaches over 90 percent, and 9 to 15 percent of heavy component is cracked into a light component.

The invention discloses a cationic electromigration imidazoline quaternary ammonium salt which is prepared by the following steps: (1) synthesizing imidazoline from C5-C18 fatty acid and diethylenetriamine; and (2) carrying out cationization reaction on the imidazoline and quaternizing reagent (comprising sodium monochloroacetate, epoxy chloropropane, epoxyethane, chloroacetic acid ethanol ammonium salt and sodium 3-chloro-2-hydroxypropyl sulfonate) in a mol ratio of 1:(1.0-1.2) at 70-90 DEG C under the condition of the pH value 3-4 for 6-8 hours, thereby obtaining the cationic electromigration imidazoline quaternary ammonium salt. When being used in a concrete reinforcing bar corrosion inhibitor, the cationic electromigration imidazoline quaternary ammonium salt can be used for reinforcing bar restoration in new concrete structures and built concrete structures. The restoration belongs to nondestructive restoration, and has the advantages of high migration rate and environment friendliness.

An aqueous composition for oral care application comprising solution of an amidobetaine of the following general Formula I is disclosed;

in which R is an alkyl of coconut fatty acids, preferably hydrogenated coconut fatty acids, or a fatty acid mixture group which, on the average, corresponds to coconut fatty acids, wherein the solution has a solids content of 36% by weight, a pH of 4.5 to 6, an alkylamidopropyldimethyl amine content of not more than 0.1% by weight, and a free fatty acid content less than 0.5% by weight, sodium chloride content of 6.0% max and dimethylaminopropylamino betaine (from N,N-dimethyl amino propyl 1,3-diamine (DMAPA) and monochloroacetic acid) content of 30 ppm max, free sodium monochloroacetic acid content of 5 ppm max and free N,N-dimethylamino propyl 1,3-diamine content of 5.0 ppm max.

The invention discloses a method for preparing a quaternary ammonium alkaloid, in particular a method for preparing anhydrous betaine. The method for preparing the anhydrous betaine is characterized by comprising the following steps of: dissolving chloroacetic acid in water to form chloroacetic acid aqueous solution; slowly adding sodium carbonate into the chloroacetic acid aqueous solution with stirring; obtaining sodium chloroacetate aqueous solution after finishing a reaction; slowly introducing trimethylamine gas into the sodium chloroacetate aqueous solution for 8 to 10 hours; distilling feed liquid until the moisture is between 25 and 35 weight percent; filtering the distilled feed liquid; transferring filtrate to a highly-enclosed device; and stirring and heating the filtrate into powder to obtain the anhydrous betaine. Therefore, the method has the advantages of no discharge of waste liquid in a production process, low production cost, low energy consumption and high product yield of generally over 97 percent.

The invention relates to a preparation method of double-longchain alkyl methyl carboxyl glycine betaine, belonging to the technical field of organic synthesis and chemical displacement of reservoir oil. Chloroacetic acid lithium is used for replacing traditional sodium chloroacetate, dissolved in absolute ethyl alcohol and reacted with double-longchain alkyl tertiary amine in a closed hydrothermal reaction kettle or high-pressure reaction kettle; the tertiary amine conversion rate in single-pass reaction is 90% and above under the best reaction condition; and the tertiary amine conversion rate can be further increased by adding a proper amount of chloroacetic acid lithium. Compared with a traditional sodium chloroacetate process, the preparation method disclosed by the invention has the advantages that tertiary amine and chloroacetic acid lithium can be reacted in homogeneous phase without water at high temperature; the reaction speed is increased; hydrolysis of chloroacetic acid is retarded; and in addition, compared with that of the traditional sodium chloroacetate process, for synthesizing surface active agents for oil displacement, namely double-longchain alkyl methyl carboxyl glycine betaine and double-longchain alkyl polyoxyethylene ether methyl carboxyl glycine betaine, the single-pass tertiary amine conversion rate of the method is increased by about 40%.

The invention relates to a betaine type salt-resistant polymer and a preparation method thereof. The functional monomer acrylamide propyl betaine of the polymer is synthesized by the following steps: reacting benzoyl chloride with acrylic acid in a molar ratio of 1:0.8, and distilling at reduced pressure to obtain acryloyl chloride; reacting N,N-dimethyl-1,3-propane diamine with sodium chloroacetate in an aqueous solution in an equal molar to obtain propane diamide quaternary ammonium salt; reacting acryloyl chloride with propane diamide quaternary ammonium salt in a saturated sodium carbonate aqueous solution in a molar ratio of 1.1:1; and extracting and drying to obtain the functional monomer. The functional monomer is copolymerized with acrylamide and N-alkyl acrylamide to obtain the betaine type salt-resistant polymer. The betaine type salt-resistant polymer has obvious tackifying property and anti-electrolyte effect, the viscosity of the polymer increases along with the increase of the salt concentration, and the polymer has excellent salt-resistant property especially divalent calcium and magnesium ions resisting property; and the synthesis method of the betaine type salt-resistant polymer is mild in reaction condition and simple and easy to operate, and is hopeful to be used in the aspects of salt-resistant work liquid in an oil field, daily chemical products, dyes, medicines, novel materials and the like.

Raw material iso-alcoholis polyoxyethyl ester reacts with sodium hydroxide under the function of organic trans-catalyst to proceed alkalization, then feeding sodium chloroacetate to proceed carboxyl reaction under alkali catalyst, finally, de-salted by organic solvent, filtration, refined to obtain iso-alcoholic polyoxy ether arboxylate. Advantages are: simple process, less side reaction, high yield, and said product can be used in washing, textile, printing and dyeing, leather and chemical fiber.

The invention relates to a fluorocarbon surface active agent containing CF3CF2CF2C(CF3)2 groups and a preparation method thereof. The preparation method comprises the following steps: carrying out nucleophilic substitution on perfluor-2-methyl-2-amylene as an initial raw material and benzyl bromine to prepare a fluorine-containing middle body carboxylic acid, and neutralizing the carboxylic acid and an alkaline solution to obtain an anionic fluorocarbon surface active agent; blending the carboxylic acid and amine to prepare a fluorine-containing middle body amide, and reacting the amide with alkyl halide, sodium chloroacetate or biphenyl benzylidene chloride to obtain a quaternary ammonium salt cation fluorocarbon surface active agent, a glycine betaine amphoteric fluorocarbon surface active agent or a double fluorocarbon surface active agent correspondingly. The method provided by the invention has the advantages that the raw materials are easily available, the technology is simple, the price is low, the repeatability is good, and the surface tension property of the product is good.

A preparation method of a bast fiber-carried titanium dioxide composite material powder comprises following steps: 1) collecting clean bast fibers, crushing the fibers before defatting the fibers with sodium hydroxide, and removing impurities for purifying; placing the bast fibers in a solvent for infiltration, carrying magnetic stirring and ultrasonic treatment with ultrasonic wave, adding dilute sulfuric acid, removing the sodium hydroxide, carrying out suction filtration, drying the fibers in an oven, taking out dried bast fibers, adding sodium chloroacetate to carry out carboxymethylation for the fibers so that carboxymethyl is generated on the surfaces of branches of the fibers, carrying out ultrasonic treatment after magnetic stirring, adjusting to neutrality, and drying the fibers in the oven; 2) weighing carboxymethyl cellulose, butyl titanate, absolute ethyl alcohol and dimethyl sulfoxide, placing them in a beaker, stirring them at room temperature prior to subjecting a mixture to ultrasound, carrying out magnetic stirring, and carrying out drying in a vacuum oven; 3) subjecting a powder to a photo-catalytic experimental test, determining degrading ability from fading of a simulated pollution source Rhodamine B, and bagging and storing the prepared composite fiber powder.

The invention discloses a method for preparing an amphoteric betaine asphalt emulsifier. The method comprises the following steps: by adopting coconut oil acyl propyl dimethyl tertiary amine as a raw material, reacting with epoxy chloropropane to obtain an intermediate in an alcohols solvent; and continuing to react with a dimethylamine aqueous solution and sodium chloroacetate, so as to obtain the amphoteric betaine asphalt emulsifier. The asphalt emulsifier is easily available in synthetic raw material, low in production cost, simple in process, and free of high-temperature reaction. The prepared emulsified asphalt is even, fine and smooth, good in storage stability, and applicable to spreading of penetrated oil or a tack coat for a high-way, and has the characteristics of a medium breaking asphalt emulsifier; each performance of the prepared emulsified asphalt can meet the standard of cationic emulsified asphalt formulated by the China's Ministry of transportation.

The invention discloses a method of preparing carboxymethylcellulose by use of manioc waste. The method mainly comprises the following craft processes: firstly, continuously stirring 10g of dried manioc waste so as to enable the dried manioc waste to be dispersed to 50g of deionized water; then, adding 0.823-2.47g of sodium hydroxide and soaking for 6 hours at a normal temperature; then, alkalizing for 1.5 hours under a water bath condition of 30 DEG C; heating to 75 DEG C and then adding 2.40-3.595g of sodium chloroacetate; reacting for 1 hour, taking out and drying; smashing and grinding, and then repeating the steps above; repeating the reaction for three times to obtain the carboxymethylcellulose with the degree of substitution within 0.20-1.19.

The invention relates to a branch fluorocarbon chain containing fluorocarbon surfactant and a preparation method thereof. The preparation method comprises the following steps: with perfluoro-2-methyl-2-pentene as the initial raw material, carrying out nucleophilic substitution with p-methylbenzyl bromine to prepare a fluorine containing intermediate 1, reacting the fluorine containing intermediate 1 with chlorosulfonic acid to obtain a fluorine containing intermediate 2 and a surfactant I, carrying out condensation with the fluorine containing intermediate 2 and amine to prepare a fluorine containing intermediate amide 4, separately reacting the fluorine containing intermediate amide 4 with haloalkane, sodium chloroacetate or 4,4-bis(chloromethyl)-1,1-biphenyl to correspondingly prepare a hyamine type cation fluorocarbon surfactant II, lycine-derived ampholytic fluorocarbon surfactant III and Gemini type fluorocarbon surfactant IV, and carrying out condensation with the fluorine containing intermediate 2 and alcohol to prepare a non-ionic fluorocarbon surfactant V. The preparation method has the following advantages that the raw material is easily available, the process is simple, the cost is low, the repeating performance is good and the product surface tension performance is good.