34results about How to "High sulfonation efficiency" patented technology

The present invention provides a method for preparing a condensation compound of methylol naphthalene sulphonic acid formaldehyde. The method comprises the following steps that methylnaphthalene is adopted as the material, and is sulfonated with 104.5 percent of fuming sulfuric acid in advance; the sulfonated product is condensed with formaldehyde; and, finally the pH is adjusted to between 6 and 9 by liquid alkali, and thus the methylol naphthalene sulphonic acid formaldehyde condensation compound is obtained. The method does not need to add an azeotrope former, and does not need to add and distill of sulfonated bodies every time. The process is simplified, the manufacturing cost is saved, and the impurity content in the product is reduced. Additionally, the 104.5 percent of fuming acid is adopted to sulfonate. Not only the efficiency of methylnaphthalene sulfuration is improved, but also the total acidity of the condensation reaction process is reduced. The subsequent process completely adopts liquid alkali. No calcium sulfate calcium offscum is produced. Compared with the adoption of concentrated sulfuric acid, the quality of the product is equivalent in dispersancy, calcium and magnesium ions are not produced, and the product is stable in heat resistance.

The present invention is the preparation process of high efficiency sulfonated straw pulp alkali lignin water reducing agent for concrete or mortar in building engineering. The preparation process includes adding 200 weight portions of water into 100 weight portions of straw pulp alkali lignin, regulating pH value to 3-10, heating to 40-100 deg.c, adding 5-15 weight portions hydrogen peroxide and 0.1-2 weight portions of transition metal salt, catalytically oxidizing for 0.5-1 hr, adding 5-50 weight portions of condensing agent and 5-50 weight portions of sulfite for sulfomethylation of 1-5 hr, and cooling the reaction product to room temperature to obtain the liquid product. The high efficiency sulfonated straw pulp alkali lignin water reducing agent has high water reducing rate, moderate delayed setting, high slump maintaining property, and high compatibility to cement and other water reducing agent.

The invention discloses a preparation method and application of an ester ether sulfonated composite water reducing agent based on straw modification. The water reducing agent is prepared from crop straw hydrolyzed powder through primary oxidation-sulfonation esterification modification, secondary oxidation-sulfonation esterification modification and primary methylolation-etherification modification of straw lignocellulose, wherein the straw hydrolyzed powder is obtained by performing primary crushing, washing, drying, fine crushing and micro crushing pretreatment on crop straw and then hydrolyzing straw powder. Crushing and hydrolyzing pretreatment are performed on a crop straw raw material, stepwise sulfonation modification is firstly performed on straw lignin and cellulose to form sulphonate, and then etherification modification is performed on the lignocellulose to obtain the straw-based ester ether sulfonated composite water reducing agent; the problem that the water reducing rateof the straw-based water reducing agent is 10-15% and is relatively low is solved; the obtained water reducing agent can be directly applied to the situation that the water reducing rate is about 25%and the delayed coagulation time is moderate; a technology is continuous, compact, easy to operate, low in cost, anti-settling and easy to industrialize.

The invention relates to controlled-release fertilizer as well as a preparation method and application thereof. The controlled-release fertilizer is prepared by taking straw powder as a raw material,carrying out sulfonation treatment under the existence of sulfite, a buffer agent, anthraquinone and copper salt, then carrying out alkalization treatment by sodium hydroxide and finally carrying outchloroacetic acid treatment. The invention also provides the preparation method and the application of the controlled-release fertilizer. In the controlled-release fertilizer provided by the invention, the molecular weight of lignin is small, the sulfonating rate is high, and the lignin and cellulose in plant straw are fully utilized; the controlled-release fertilizer can be applied by adding water or be applied as base fertilizer or topdressed fertilizer, a slow release effect is good, and release of nutrients can be effectively controlled.

The invention discloses a preparation method of polystyrene sulfonic acid type ion exchange resin for water purification. The preparation method comprises the following steps: stirring styrene, divinylbenzene, tribromomethane, methanol and benzoyl peroxide, in order to obtain a first preformed material; uniformly mixing water, polyvinyl alcohol and 2-methyl methacrylate, adding methylene blue with stirring till complete dissolving, and adding the first preformed material with stirring to obtain a second preformed material; adding chloroform into the second preformed material for swelling, adding a sulfuric acid solution and chlorosulfonic acid with stirring, evaporating the chloroform, cooling the temperature, adding water, carrying out a standing, removing a water layer, and washing a product till the pH is 7 to obtain a third preformed material; adding a sodium hydroxide solution into the third preformed material with stirring, carrying out a filtering, washing a product till the pH is 7, adding water with stirring, heating to 92-97 DEG C, carrying out an insulation and a filtering, adding absolute ethyl alcohol with stirring for backflow, carrying out cooling and filtering, washing a product till the pH is 7, and carrying out a drying to obtain the polystyrene sulfonic acid type ion exchange resin for water purification.

The invention relates to a lignin fertilizer and a preparation method and application. The lignin fertilizer takes straw as a raw material, and straw together with sulfite, a buffering agent, anthraquinone and copper salt undergoes a one-step reaction to prepare a liquid fertilizer. The content of lignin is 1.5-3.5% according to a mass ratio, and the weight average molecular weight of lignin is 2000-5000. The invention further provides a preparation method and application of the lignin fertilizer. Lignin in plant straw is fully applied at a high value. The lignin is small in molecular weight,high in sulfonation rate, good in sulfonation and beneficial for crop absorption. The preparation step is simplified, and the lignin fertilizer is obtained through a one-step charging reaction.

The invention discloses a silk fibroin sulfonation modification method and technical screening of anticoagulant properties of sulfonated silk fibroin, belongs to the field of biological (medical) materials, and mainly relates to the following steps: natural silk is boiled in an alkaline (0.5% (wt%) Na2CO3 water solution) for degumming, and rinsed with distilled water, then silk fibroin fiber is dried at the temperature of 50 DEG C, then the dried silk fibroin is reacted with chlorosulfonic acid, a corresponding sulfonated modified silk fibroin solution is obtained by all steps of a sulfonation process optimized by an orthogonal method, then is neutralized into a neutral solution by use of a sodium hydroxide solution, then cooled to room temperature, transferred into a dialysis bag for dialysis for 72hr, concentrated by rotary evaporation, and frozen and dried to obtain sulfonated modified silk fibroin powder. By the optimized sulfonation process, the use amount of the chlorosulfonic acid can be reduced, the anticoagulant properties of the sulfonated silk fibroin can be improved, the repeatability is good, the product is pure, and the composition is stable.

The invention discloses an application of araboxylan sulfonate to preparation of a medicine for treating osteoarthritis, and belongs to the technical field of medicines. According to a large number ofstudies, the araboxylan sulfonate has very obvious osteoarthritis treating functions, inflammation can be eliminated, cartilage repair can be promoted, and illness states can be reversed to a certaindegree, so that the araboxylan sulfonate can be used for preparing the medicine for treating the osteoarthritis.