70results about How to "Weak alkaline" patented technology

The invention belongs to the technology of marine chemical engineering and particularly relates to a method for removing fruit-vegetable pesticide residue by utilizing scallop shell powder. Grinding and crushing scallop shells, calcining for 2 hours at high temperature of 900 DEG C, sieving with a 300-mesh screen after cooling, so as to obtain scallop shell powder, and adding a little amount of beta-cyclodextrin, sodium alginate and asterosaponins to prepare powder for removing the pesticide residue. Compared with a Japanese scallop shell powder product for removing the pesticide residue, the method has the advantages that the calcining temperature is decreased from 1000 DEG C to 900 DEG C under the condition with same calcining time, so that the heat loss is greatly reduced. The prices of the beta-cyclodextrin, the sodium alginate and the asterosaponins which are added in the product are low, the use amount is less, the influence on the cost of the product is low, and the effect of the scallop shell powder preparation for removing the pesticide residue is greatly improved.

The invention discloses a sodium ion battery negative electrode material and a preparation method thereof, and the preparation method comprises a preparation method (1) or a preparation method (2). The preparation method (1) is: firstly activating the soft carbon and then coating the hard carbon; the preparation method (2) is: firstly activating the hard carbon and then coating the soft carbon. The preparation method firstly introduces a large number of developed pore structures by activating the soft carbon/hard carbon to provide more storage space for sodium ions, which is favorable for theincrease of material capacity; then the coating of a hard carbon/soft carbon precursor can effectively cover the defects and edge faces caused by the activation, reduce the irreversible capacity losscaused by the insertion and removal of sodium ions, and effectively improve the first-week coulomb efficiency. The sodium ion battery negative electrode material of the invention has the advantages oflow cost, high capacity and high first-week coulomb efficiency, and high cost performance; in addition, the preparation method of the invention is simple and suitable for commercial application.

The invention belongs to the field of wallpaper accessories and particularly relates to a nano-silver wallpaper primer which is prepared by mixing the following raw materials in part by weight: 350 to 415 parts of deionized water, 10 to 15 parts of ethylene glycol, 0.5 to 1 part of nano-silver, 0.5 to 1 part of pH control agent, 100 to 200 parts of transparent adhesive, 250 to 350 parts of odorless latex, 8 to 10 parts of film-forming adjuvant, and 6 to 8 parts of alkali-swelling thickener. The nano-silver wallpaper primer product can inhibit the growth of bacteria on the surface of a wall body and prevent mildew of wallpaper, increases the density of the wall surface, solves the problems of wall body chalking and water molecule lateral seepage, and keeps the pH of the wall body balanced to ensure that the pH value of the wall surface trends to be neutral.

The preparation of faintly alkaline alkylbenzene sulfonate adopts heavy alkylbenzene through rectification and cutting treatment as main material, which is reacted with fuming sulfuric acid and SO3 gas or liquid. Through subsequent addition of technological water to hydrolyze, aging, addition of sodium hydroxide solution for neutralization and other steps, sodium alkylbenzene sulfonate is produced. Adding lower carbon alcohol, aromatic solvent or other solvent, and non-ionic surfactant can produce faintly alkaline alkylbenzene sulfonate surfactant.

The invention relates to a preparation method of chlorfenapyr, wherein, 4-bromine-2-(4-chlorphenyl)-5-trifluoromethyl pyrrole-3-nitrile and chloromethyl ethers are taken as raw material, alkali carbonate or organic amine is taken as acid-binding agents, and esters are taken as reaction solvent so as to prepare chlorfenapyr. The preparation method adopts ester solvent, reduces the treatment difficulty of waste water in the later period, lowers the manufacturing cost greatly, and reduces the environmental protection treatment pressure; the manufacturing cost is 20 percent lower than the diethoxymethane technology and is 10 percent lower than the ketones solvent technology; the wastewater quantity is only about 10 percent of the diethoxymethane technology and is about 25 percent of the ketones solvent technology; and unforeseen benefits can be achieved by compared with the traditional ketones solvent.

The invention provides a ceramic cleaning agent, which comprises: 3-10 parts of an inorganic alkali, 3-14 parts of a chelating agent, 5-18 parts of a solubilizing agent, 3.5-17 parts of a surfactant,and the balance of deionized water. According to the preset invention, the ceramic cleaning agent has advantages of simple formulas, easily-available raw materials, moderate cost and reasonable ratioof the raw materials, further has characteristics of weak alkalinity, strong wettability, do corrosion to ceramic substrates, unique penetrating power and the like, can effectively remove the residueof cerium dioxide, silicon dioxide and aluminum oxide auxiliary material particles used in rough polishing and fine polishing, and can achieve the product qualification rate of up to 96%. The invention further provides a preparation method of the ceramic cleaning agent, wherein the preparation process is simple, and the method is suitable for industrial production.

This invention provides a preparation method for preparing pure Letrozole, which takes sodium ethoxide as the catalyst, in which, the reaction temperature is not higher than 30deg.C. Advantages: the alkali of sodium ethoxide is weak and reacts mildly, and its conditions in both labs and production are simple and easy to be got.

The invention discloses a preparation method for hydroxycalcium carbonate for an animal feed. The preparation method comprises the following steps: adding a calcium source to water and warming, addingbicarbonate in a stirring condition, reacting in a constant temperature, after ending a reaction, cooling and crystallizing, filtering and drying, to obtain the hydroxycalcium carbonate. The preparation method is more moderate in reaction rate, controllable in process, more uniform in obtained product particles, less in by-product generation, high in bioavailability of the hydroxycalcium carbonate, and low in processing cost. The invention further discloses an application of the hydroxycalcium carbonate in the animal feed field. While the hydroxycalcium carbonate is used for a pig feed, an additive amount thereof is 1-12 kg/t of a mixed feed; while the hydroxycalcium carbonate is used for a poultry animal feed, the additive amount thereof is 1-23 kg/t of the mixed feed; and while the hydroxycalcium carbonate is used for a ruminant animal feed, the additive amount thereof is 0.1-4 kg/t of a full mixed daily ration feed. The application is capable of neutralizing acidic materials in thefeed, and preventing or delaying metamorphism of the feed.

The invention belongs to the technical field of organic synthesis. The invention particularly relates to a preparation method of an epoxy compound. The specific preparation method comprises the following steps: with epihalohydrin as a raw material and H2S as a sulfo-hybridization reagent, performing a catalytic reaction under a resin catalyst to prepare the epoxy compound; according to the preparation method, the reaction conditions are mild, the operation is simple, the equipment investment is low and the raw material cost is low. The method is free of waste gas, liquid and solids, wherein the adopted solvent is a single solvent and is convenient to recycle, and the catalyst resin can be recycled, so that the production cost is greatly reduced.

The invention relates to a furniture detergent composition. The composition is prepared through using 5-10 parts by weight of sodium dodecyl benzene sulfonate, 20-40 parts by weight of sodium carbonate, 8-15 parts by weight of sodium chloride, 8-15 parts by weight of sodium sulfate, 15-25 parts by weight of sodium tripolyphosphate, 8-15 parts by weight of tetrasodium pyrophosphate, 5-10 parts by weight of sodium dimethylbenzenesulfonate, 1-3 parts by weight of an essence and 50-60 parts by weight of water. The composition is prepared through uniformly mixing all the above raw materials in water. The furniture detergent composition has the advantages of strong dirt removal capability, very weak alkalinity, no destroy to the paint film of the furniture, bright paint film surface, and paint film surface protection.

The invention provides low-nicotine paper-making process reconstituted tobacco and a preparation method and application thereof. The preparation method of the low-nicotine paper-making process reconstituted tobacco comprises the following steps of: mixing tobacco fibers, wood pulp fibers and filler, then adding water, and performing heating extraction; centrifuging the leaching solution to obtaina tobacco extracting solution; pulping the solid matter according to a papermaking process, and forming to obtain a substrate; concentrating the tobacco extracting solution under reduced pressure to obtain water paste; adding ammonia water into the water paste, performing uniform stirring, mixing with an organic solvent, and performing extracting; separating the solution after extraction to obtainan organic phase and a water phase; mixing the water phase with an ethanol solution, performing uniform stirring, and performing concentrating under reduced pressure to obtain a coating solution; andcoating a substrate with the coating solution, and performing drying to obtain the low-nicotine paper-making process reconstituted tobacco. The low-nicotine paper-making method reconstituted tobaccoprepared through adoption of the method is low in nicotine content, can replace part of tobacco raw materials to be added into traditional or novel cigarettes, can effectively reduce tar, nicotine andother harmful substances in smoke, and reduces harm to the human body.

The invention discloses caprolactamyl silane and a preparation method thereof. The invention relates to the technical field of organic synthesis. According to the invention, caprolactam, a methanol solution and benzene are added into a three-necked flask with a stirring device; stirring and heating are carried out, and a reaction is allowed; an obtained material is cooled to room temperature; filtering is carried out; after a stirring reaction, solid salt is dried, such that caprolactam sodium salt is obtained; the prepared caprolactam sodium salt, chloropropyl silane, a phase transfer catalyst, and an organic solvent are added into a three-necked flask with a reflux device; stirring and heating are carried out, and a reaction is allowed; the temperature is maintained; after the reaction, the temperature is reduced to room temperature; filtering is carried out, such that a byproduct is removed, and a filtrate is extracted; the filtrate is subjected to reduced-pressure distillation; and the solvent is removed through vacuum heat preservation, such that caprolactamyl silane is obtained. The caprolactamyl silane provided by the invention has good compatibility with polyamide resin. The method has high reaction efficiency. When in use, caprolactamyl silane has good stability. When polyamide resin is combined with polyamide resin, a strength increase is higher than 20%. The cost is low, and strength increase is high.

The invention relates to a novel synthesis method of mequindox. The method comprises the following steps of 1, weighing benzo oxazo dinitrogen pentyl-N-oxide and an organic solvent, putting the materials in a reaction kettle, starting to stir the materials, and then heating the reaction kettle to 55 DEG C; 2, weighing acetylacetone, adding the acetylacetone in the reaction kettle, controlling thetemperature to be 55-62 DEG C, and then maintaining the temperature for 2 hours; 3, adding weighed potassium acetate repeatedly, maintaining the temperature of 60-65 DEG C for 2-3 hours of a reaction,then decreasing the temperature to 20-25 DEG C, utilizing a centrifugal machine for separation, cleaning filter cakes with an organic solvent, and then drying to obtain a crude product of mequindox.The method has the advantages that the potassium acetate is adopted as a catalyst, since the potassium acetate is dissolved quickly in methyl alcohol or ethyl alcohol, the catalysis efficiency is improved, the alkalinity of the potassium acetate is weaker than that of sodium carbonate, and the reaction is easy to control; as is indicated by experimental data, when the potassium acetate is selectedas the catalyst, the yield of the product is increased by 13%, and the reaction time is shortened to 2-3 hours.