64 results about "Sodium Isethionate" patented technology

The invention relates to a method for synthesizing taurine. The production technique comprises the steps: A. sodium bisulfite, epoxyethane and sodium hydroxide are placed in a reaction kettle to produce sodium isethionate through reaction; sodium isethionate reacts with liquid ammonia at temperature of 260 DEG C and 270 DEG C and a pressure of 18.5MPa to 19MPa to synthesize and produce sodium 2-amino ethyl sulfonate; B. a sodium 2-amino ethyl sulfonate solution is added with sulphuric acid and goes through centrifugal filtration, thus obtaining the rough crystals of taurine; and C. the rough crystals of taurine are refined and dried. The method has the advantage that by changing the temperature and pressure for reaction, the yield of sodium 2-amino ethyl sulfonate (the intermediate product for synthesizing and preparing taurine) is improved; the occurrence possibility of side reaction is lowered; and the content of impurities is obviously reduced.

The present invention discloses a process for the preparation of taurine from ethionic acid and ethanol by way of ethanol-derived ethionic acid by the ammonolysis of ethionic acid and by the ammonolysis of sodium isethionate and sodium vinyl sulfonate, key intermediates prepared from ethionic acid.

The present invention discloses a process for the preparation of taurine from ethionic acid and ethanol by way of ethanol-derived ethionic acid by the ammonolysis of ethionic acid and by the ammonolysis of sodium isethionate and sodium vinyl sulfonate, key intermediates prepared from ethionic acid.

The invention provides a safe and efficient taurine synthesis method. The taurine synthesis method comprises the following steps: adding sodium hydrogen sulfite and ethylene oxide to prepare sodium isethionate; carrying out ammonolysis on sodium hydroxyethyl sulfonate and liquid ammonia at a high temperature to obtain sodium taurate; acidifying sodium taurate, and carrying out crystallization to obtain a taurine pure product. Before addition reactions, impurities are filtered by a nano-filtration membrane, and the side reaction influence is eliminated. The method has the advantages of mild ammonolysis reaction conditions and shortened reaction retention time, and the industrial production is safe and efficient.

The invention discloses a method for synthesizing a fatty acyl amino acid surfactant by using a direct method. The method comprises the following steps: (1) adding fatty acid, methylamine and hydroxyethyl sulfonate into a reactor; (2) closing the reactor, and slowly heating to 150-300 DEG C; (3) carrying out a heat preservation reaction for 2-10 hours; (4) distilling to remove unreacted methylamine; and (5) treating to obtain a finished product. According to the invention, fatty acid, methylamine and sodium isethionate are selected to be subjected to a direct reaction, impurities such as chlorine ions and the like are not introduced in the process, and the target product is obtained through the direct reaction, so that the purification steps such as acidification, salification and the likeare omitted, and the use and discharge of salt-containing wastewater or an organic solvent are reduced; and the operation is convenient, the industrial production is easy to realize, the product formof the prepared product can also be changed according to actual requirements, and the cost advantage and the application convenience advantage of the product are improved.

The invention relates to a microwave synthesis method of sodium fatty acyloxy isethionate. The method provided by the invention has the characteristics of good product quality, simple processing equipment and low energy consumption. The technical scheme is as follows: the method sequentially comprises the following steps: 1. putting fatty acid and sodium isethionate into a special reaction bulb for microwaves in a mol ratio of 1:(1.0-1.3), heating to 180-200 DEG C by microwaves, reacting under the pressure of 10-100KPa for 30-60 minutes, and removing water generated in the reaction process by introducing nitrogen or vacuumizing; and 2. cooling the reaction product, and slicing to obtain the sodium fatty acyloxy isethionate. The fatty acid is a C8-C20 fatty acid or mixture thereof. In the reaction process, the N2 is introduced for protection and dewatering; and by using the number of bubbles as the counting unit, the flow rate of the N2 is 60-120 bubbles / min.

The present invention discloses a comprehensive utilization method of sodium hydrosulfite waste residue. The comprehensive utilization method comprises that: (1) a vacuum distillation method is adopted to remove water in sodium hydrosulfite waste residue and concurrently obtain ethylene glycol; (2) the remaining waste residue obtained from vacuum distillation is washed by using an organic solvent to obtain an organic phase I and a solid A; (3) according to different solubilities of the solid in the solvent, sodium isethionate and sodium formate can be obtained; and (4) the organic phase I is subjected to vacuum distillation to recover the solvent and concurrently obtain thiodiglycol. According to the invention, the waste residue produced in the sodium hydrosulfite production process is subjected to comprehensive utilization and is purified to obtain four organic products, such that enterprise waste emission is reduced while economic benefits and social benefits are brought to enterprises.

The invention provides a method for preparing taurine from sodium isethionate. The method comprises the following steps of: efficiently catalyzing the ammonolysis reaction of sodium isethionate by using a Pd-C / Al2O3 heterogeneous catalyst with a shape selection function, and then conducting neutralizing, crystallizing, separating and the like to obtain a taurine product. Compared with a traditional basic catalyst, the catalyst provided by the invention can be used for limiting the generation of macromolecular by-products including disubstituted sodium taurate and trisubstituted sodium tauratethrough a unique pore channel structure, so that the selectivity of sodium taurate in the ammonolysis reaction is improved; meanwhile, due to the excellent catalytic performance of the catalyst, the temperature and the pressure of the ammonolysis reaction are effectively reduced, the reaction time is shortened, and the catalyst can be separated and recycled through simple filtration.

The invention discloses an acne-removing facial cleanser which comprises the following components in parts by weight: 20-30 parts of a mulberry extract, 10-15 parts of rice washing water, 3-8 parts of honeysuckle, 1-5 parts of lemon juice, 3-6 parts of honey, 5-10 parts of olive oil, 3-9 parts of hyaluronic acid, 3-5 parts of sodium cocoyl isethionate, 0.1-0.3 part of disodium EDTA (ethylene diamine tetraacetic acid), 0.1-0.3 part of essences and 20-30 parts of de-ionized water. According to the acne-removing facial cleanser, the essential substances of the mulberries are extracted, and the rice washing water, the honeysuckle and the lemon juice are added, so that the acne-removing facial cleanser has the effects of clearing heat and toxins, resisting bacteria, diminishing inflammation, lightening and removing freckles, thoroughly cleaning skin, and the like, and has a remarkable effect for acnes, spots and chloasma after being used for a long term.

The invention provides a method for preparing taurine from sodium isethionate. The method comprises the following steps: catalyzing the reaction between sodium isethionate and ammonia by using a heterogeneous catalyst to generate sodium taurate, then neutralizing, crystallizing, separating and the like to obtain the finished product taurine, wherein the heterogeneous catalyst is one or more of Zr2MoO4 (PO4) 2, ZrMo2O8 or MoO3. Compared with a traditional basic catalyst, the process has the advantages that the temperature and the pressure of the sodium hydroxyethyl sulfonate ammonolysis reaction can be remarkably reduced, the reaction time is shortened, and the adopted catalyst is easy to separate and recover and is suitable for industrial production.

The invention discloses a method for producing sodium isethionate by continuous reaction. The method comprises the following steps: carrying out addition reaction on a sodium hydrogen sulfite aqueoussolution and ethylene oxide serving as raw materials, mixing the sodium hydrogen sulfite aqueous solution with certain concentration with the ethylene oxide at certain flow rate, and staying for a period of time from a first reactor; mixing the first-stage reaction liquid with ethylene oxide at a certain flow rate at a certain flow rate, enabling the mixture to enter a second reactor, staying fora period of time, enabling the mixture to respectively enter a third reactor, a fourth reactor and a fourth reactor in this way, adding acidic substances to adjust the pH value to 7.0-8.0, and finallydischarging. According to the method, the addition reaction is carried out in at least four stages, and the process parameters of each stage are accurately regulated, so that the hydrolysis rate of ethylene oxide and the content of byproducts such as ethylene glycol and polyethylene glycol in the product are effectively reduced, the yield of sodium hydroxyethyl sulfonate is increased, a subsequent purification process is avoided and the production cost is reduced, and other uses are more convenient.

The invention provides a method for preparing taurine. An adopted heterogeneous catalyst system can greatly improve the technological conditions for preparing taurine from sodium isethionate, and in addition, byproducts including ethanolamine, ethylene glycol and dipolyethylene glycol are removed through a high-temperature spray dryer, and complete application of effective components of mother liquor is achieved. Compared with the traditional process, the process has the advantages that the reaction temperature and pressure conditions required by the ammonolysis reaction of the sodium isethionate are milder, and meanwhile, the reaction time is also shortened. The method realizes complete application of effective components in the mother liquor, significantly improves the total yield of taurine, is easy for industrial production, and reduces the production cost of the product.

The invention provides a method for preparing taurine from sodium isethionate, which uses molybdate homogeneous catalyst to catalyze the ammonolysis reaction of sodium isethionate, and then obtains the finished taurine through steps such as neutralization and crystallization separation. sulfonic acid. Compared with traditional basic catalysts, the process can significantly reduce the temperature and pressure of the ammonolysis reaction of sodium isethionate, shorten the reaction time, and is easy for industrial production.

The invention discloses a stable high-oil phase content composition for personal care.The composition contains 5 wt% or above of a grease ingredient and a surfactant prepared from sodium cocoyl isethionate and disodium C-[2-[2-[2-(dodecyloxy)ethoxy]ethoxy]ethyl] sulphonatosuccinate.The invention further discloses application of the composition in personal care products.

The invention provides a method for determining a content of taurine in a solution and a method for purifying the taurine. The method comprises the steps of determining the refractive index of a to-be-detected solution, wherein the to-be-detected solution contains taurine or salt thereof and impurities, and the impurities comprise at least one of ethylene glycol, sodium isethionate, sodium sulfate and polyethylene glycol; establishing a standard curve of the taurine concentration in the taurine solution based on the refractive index; and performing optical detection on the to-be-detected solution, and determining the content of the taurine or the salt thereof in the to-be-detected solution according to the position of the obtained optical detection value in the standard curve. Through the method, the content of taurine in various taurine solutions with complex components can be effectively detected.

The invention provides a preparation method of taurine intermediate sodium taurate. The preparation method comprises the following steps: providing sodium hydroxyethyl sulfonate and an ammonia source;placing the sodium isethionate and the ammonia source in an ammonolysis reactor for an ammonolysis reaction to obtain a mixture containing taurine intermediate sodium taurate, wherein the molar ratioof ammonia in the ammonia source to the sodium isethionate is 25: 1 or above. The invention also provides a preparation method of taurine.

The invention discloses a preparation method of sodium isethionate, which comprises the following steps of: introducing a novel deep-eutectic solvent which has good dissolvability to raw materials sodium hydrogen sulfite and ethylene oxide but has no dissolvability to products; and passivating the deep-eutectic solvent by using an inhibitor, dissolving sodium hydrogen sulfite in the passivated deep-eutectic solvent, introducing ethylene oxide into a reaction solution according to a ratio, and carrying out an addition reaction on sodium hydrogen sulfite and ethylene oxide to obtain sodium isethionate. As the solvent cannot dissolve sodium isethionate, the sodium isethionate is continuously separated out in a solid form along with the reaction without influencing the reuse of the reaction mother liquor. According to the method, the problem of accumulation of impurity ethylene glycol in a traditional ethylene oxide method is solved, and solid sodium isethionate with extremely high purity can be directly obtained.

The invention belongs to the technical field of production of antifogging agents, and discloses a novel antifogging agent for vehicles, wherein the novel antifogging agent composition comprises, by weight, 1-2 parts of brominated acetylcholine, 1-2 parts of phenacetin, 1-3 parts of sodium lauryl sulfate, 1-3 parts of sodium secondary alkylsulfonate, 1-3 parts of fatty alcohol sodium isethionate, 0.5-2 parts of coconut oil fatty acid diethanolamide, 0.5-2 parts of hydroxy synthetic alcohol polyoxyethylene, 0.5-2 parts of alkyl glycoside, 0.2-1 part of sodium citrate, 2-7 parts of glacial aceticacid, 60-75 parts of anhydrous ethanol, 8-15 parts of hard water softener, 0.2-1 part of preservative, and 16-32 parts of water. The process of the novel antifogging agent comprises selecting materials, stirring, mixing the raw materials, filtering, and preparing the finished product. According to the present invention, the novel antifogging agent can rapidly remove mist, and has substantially improved durability and substantially improved low-temperature resistance.

The invention provides a preparation method of sodium N-methyl taurate, which is prepared by reacting sodium isethionate and methylamine in the presence of a catalyst with ionic liquid as the reaction medium, wherein the catalyst is Zr and W-modified HY molecular sieves. The preparation method of sodium N-methyl taurate provided by the invention can greatly improve the yield and selectivity of sodium N-methyl taurate, catalyst and ionic liquid are all easy to recycle and reuse, and the cost is low, and the temperature in the reaction process And pressure is lower, and process condition is milder, and reaction time obviously shortens, and aftertreatment process is easy, and therefore, the preparation method of sodium N-methyl taurate provided by the invention is particularly suitable for large-scale industrial production.

The invention relates to high grade cobalt sulfonate slag produced by using ammonium sulfate instead of copper sulfate as an oxidant. The high grade cobalt sulfonate slag comprises 15 to 21 percent of cobalt. The method comprises the following steps: preparing an agent from sodium isethionate, ammonium persulfate and cobalt in a ratio of (9-12):(4-5):(0.5-2); preparing the sodium isethionate into a 10 percent solution, and preparing the ammonium persulfate into a solution for later use; introducing 40 to 45 m<3> of two-stage cadmium removing solution into a cobalt removing tank, controlling the pH of initial acid to be more than 5.0, adding sodium hydroxide to regulate the pH to the required range when the acidity is high, and controlling the temperature to be less than or equal to 45DEG C; and adding the ammonium persulfate, slowly and uniformly adding the sodium isethionate, controlling the dosing time to be 20-30 minutes, reacting for 0.5 to 1.5 hours, discharging a solution into a middle tank by opening a bottom current valve, pumping into a cobalt removing filter press by using a pump for filter pressing, unloading the cobalt slag into a cobalt slag primary rinsing bath, and conveying filtrate into a leaching workshop.

The invention relates to a method for efficiently synthesizing N-methyltaurine and sodium N-methyltaurate, which comprises the following steps of: preparing sodium isethionate in situ from ethylene oxide, sulfur dioxide and sodium hydroxide under the action of a boron phosphine ligand catalyst, adding methylamine into a reactor, and generating the sodium N-methyltaurate under the action of the same catalyst, and then generating N-methyltaurine and sodium sulfate through sulfating of sodium N-methyltaurate. The process has the advantages of high catalytic efficiency of the catalyst, convenience in post-treatment of the product and high reaction yield, and is a green and environment-friendly process.

The invention provides an intelligent reaction system and method for preparing Nmethyl sodium taurate, and the system comprises an amination reaction kettle, an amination reaction product from the amination reaction kettle enters a first gas-liquid separation tank after reaction through a tubular reactor, and the side wall of the amination reaction kettle is provided with a raw material inlet, Theraw material inlet is provided with a microinterface generator used for dispersing crushed materials into microbubbles, the side wall of the microinterface generator is provided with a methylamine inlet, and the methylamine inlet is connected with a vaporizer so as to vaporize methylamine. According to the intelligent reaction system for preparing the N-methyl sodium taurate, the microinterface reactor is arranged at the raw material inlet of the amination reaction kettle, so that the problem of low reaction efficiency of the system due to the fact that methylamine and sodium isethionate cannot be fully mixed in the reaction kettle in the prior art is solved.

The invention discloses a sodium isethionate ellipsoidal crystal and a preparation method thereof. Add the crude sodium isethionate into water to make a suspension with a certain concentration, then add a certain proportion of gallic acid as an additive, raise the temperature to 80-100°C, and stir to dissolve the system. The sodium isethionate solution was evaporated and concentrated to a certain extent by means of programmed decompression. Then grow the crystal for a period of time, and then lower the temperature of the system to 10-25°C by means of program temperature control. After centrifugation, washing and drying, ellipsoidal sodium isethionate crystals can be obtained. The main particle size of the ellipsoidal crystal is 500 μm-700 μm, and the bulk density is 1.10 g / mL-1.30 g / mL. The method has high production efficiency, simple technological process and easy industrialization.

The invention relates to the technical field of textiles, and discloses a dyeing process of a crystal linen fabric. The dyeing process is characterized by comprising the following steps of S1, carrying out pretreatment; S2, carrying out pre-shrinking; S3, carrying out primary washing; S4, carrying out dyeing, namely dyeing the grey cloth after being treated in the S3, wherein a dye used for dyeingcomprises the following raw materials in parts by weight of 25-45 parts of disperse dye, 20-30 parts of dispersant MF, 15-25 parts of ammonium sulfate, 25-45 parts of fatty acid methyl ester polyoxyethylene ether sulfonate and 5-10 parts of sodium cocoyl isethionate, and adjusting the pH of a dyeing solution to be 5-6 by adopting acetic acid; S5, performing water washing again; S6, carrying out color fixing treatment, and S7, performing shaping to obtain the crystal linen fabric with high color fastness through the step S7. Ammonium sulfate serves as a corrosion inhibitor, so that the dyeingspeed of the disperse dye and spandex can be slowed down, the dyeing speed of the disperse dye and the polyester and the spandex is equivalent; and the sodium cocoyl isethionate can increase the acting force of the disperse dye and the spandex, so that the connection fastness between the disperse dye and the spandex is enhanced.

The invention relates to a production method of high-quality 4-(2-hydroxyethyl)piperazine-1-ethanesulfonic acid. The method comprises the following steps: (1) feeding sodium hydroxyethyl sulfonate, hydroxyethylpiperazine and a catalyst according to a certain ratio, and reacting in a channelized continuous production mode; (2) exchanging the reaction liquid after the reaction with hydrogen type cation exchange resin; and (3) carrying out concentration treatment on the exchanged exchange liquid, adding ethanol, carrying out cooling crystallization, centrifuging to obtain a hydroxyethyl piperazine ethanesulfonic acid crude product, and carrying out fine treatment on the crude product to obtain the high-quality 4-(2-hydroxyethyl)piperazine-1-ethanesulfonic acid. According to the invention, thecondensation reaction of sodium hydroxyethyl sulfonate and hydroxyethyl piperazine is carried out in a channelized reaction mode without a polar solvent with a low boiling point, and exchange treatment and regeneration treatment are carried out by adopting the hydrogen type cation exchange resin, so that the defect that more impurities are brought in when strong acid is used as an acidifying agent is avoided; and the regenerated liquid can be used as a sodium isethionate reaction raw material, and the raw material utilization rate is high.

The invention discloses N-maleimide-N-sodium isethionate. The N-maleimide-N-sodium isethionate is characterized by comprising, by weight, 10-30 parts of 2-amine ethanesulfonic acid, 10-30 parts of maleic anhydride and 10-30 parts of catalysts. The N-maleimide-N-sodium isethionate has the advantages that anion active groups and cation active groups are simultaneously led into active monomers and can be copolymerized with other active monomers to obtain amphoteric polycarboxylate water reducing agents, effects of repetitive units in polymer molecules can be improved under the synergistic effectsof the anion active groups and the cation active groups in the active monomers, and accordingly the application performance of the polycarboxylate water reducing agents can be improved.

The invention discloses a leak hunting agent for an aircraft oxygen system and a preparation method thereof, and the leak hunting agent for the aircraft oxygen system comprises the following components in percentage by mass: 0.2-0.3% of sodium myristoyl isethionate, 0.05-0.1% of tea saponin, 0.05-0.1% of a foam-stabilizing corrosion-inhibiting auxiliary agent and the balance of deionized water. The foam-stabilizing corrosion-inhibiting auxiliary agent has various functional groups such as alkenyl, acylamino, hydroxyl and =N-O groups, and the acylamino and the =N-O groups have hydrophilicity, so that the foam-stabilizing corrosion-inhibiting auxiliary agent has the foaming and foam-stabilizing effects of a surfactant, and the foam height and durability of the myristoyl sodium isethionate can be enhanced; long-chain alkenyl can be directionally adsorbed to the surface of metal to form a compact adsorption layer to protect the metal from being corroded, and can have a synergistic corrosion inhibition effect with tea saponin; the carbon black is equivalent to N-O to adsorb H+ in an aqueous solution, and part of the carbon black forms quaternary ammonium groups, so that the carbon black has a certain anti-mold effect, and the carbon black and tea saponin have a synergistic antibacterial effect to jointly ensure that a product is not deteriorated; in addition, the buffer effect of stable PH value is achieved.

The invention relates to a method for preparing N-sodium methyl taurate. According to the method, N-sodium methyl taurate is synthesized from methylamine and sodium isethionate as raw materials in water as a solvent under the action of a catalyst V2O5-WO3 / TiO2. The method for preparing N-sodium methyl taurate provided by the invention is high in atom utilization rate, high in selectivity, mild in reaction condition, easy to operate and good in controllability, and is a green and environment-friendly preparation method.

The invention provides a high efficiency liquid chromatograph analysis method for sodium isethionate, which relates to an HPLC-ELSD analysis method for analyzing the content of impurities of fatty acyl sulfonate. The invention makes use of the high efficiency liquid chromatography analysis method and an evaporative light-scattering detector to measure the content of the sodium isethionate with a standard curve method; and a sample is dissolved with methanol, methanol-water is used as a mobile phase, a stainless steel column using Lichrospher-C18 as a filler and the evaporative light-scattering detector are used, the recovery rate is between 95.2 and 98.3 percent, the detection limit is 0.02 mu g / mL, and the precision RSD is less than 3.00 percent. The method uses popularized instruments and has simple steps, and the measuring result is verified by the conventional ion chromatography method, is correct and reliable, and has high sensitivity and good reproducibility. The invention discloses a sensitive, rapid and simple high efficiency liquid chromatograph method for detecting the content of the sodium isethionate (SI), which controls the SI content in the formulation of a solid synthetic detergent soap to further play an important role in quality control of products.

The invention discloses efficient and nutritional plant liquid shampoo which is characterized by comprising the following raw materials in percentage by weight: 3-5 percent of an aloe extracting agent, 2-3 percent of natural tea tree extracting solution, 0.5-0.8 percent of olive fruit oil, 0.5-0.8 percent of PEG-7 olive oil, 0.3-0.5 percent of polyoxyethylene lauryl ether sodium sulfate, 0.2-0.4 percent of polymeric quaternary ammonium salt-10, 0.3-0.5 percent of stearic acid glycol ester, 0.5-0.8 percent of octadecanol, 0.8-1 percent of cocamidopropyl betaine, 2-5 percent of a pH adjusting agent, 1-2 percent of silicone emulsion, 0.5-0.8 percent of a mixture of hydroxyl zinc pyrithione and hexamidine sodium isethionate with the ratio of 1: 5, 0.3-0.5 percent of macromolecular polymer, 1-2 percent of a non-ionic surfactant, 0.3-0.5 percent of a preservative, 0.2-0.3 percent of essence and the rest of deionized water. The liquid shampoo can effectively improve scalp itching and promote scalp health, has the functions of nursing and sterilizing the scalp and relieving itching on the scalp, is natural, mild and nearly non-irritant, can be used for a long time, and can be either used for nursing dry and harmed hair or realizing daily nursing.