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 discloses a cleaning and nursing agent for sports shoes and a preparation method thereof. The cleaning and nursing agent for the sports shoes of the invention consists of the following components in percentage by weight: 8 to 27 percent of sodium cocoate, 4 to 9 percent of triethanolamine, 16 to 22 percent of oleic acid, 1 to 10 percent of leather gloss agent, 0 to 3 percent of spice, 0 to 1 percent of softener, 0 to 1 percent of brightening agent and 35 to 66 percent of de-ionized water. The cleaning and nursing agent for the sports shoes of the invention is formed by mixing, combining and emulsifying the natural raw materials, so that the cleaning and nursing agent has the advantages of weak alkalinity, high permeability, water-proof effect and capability of effectively removing dirt in grains of the vamps without damaging the leather and the vamp material, nursing the vamps and increasing the glossiness and thus is an environment-friendly product.

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.

This invention describes a sulfurous acid generator that employs a burn chamber that acts as a sulfur hopper. Generally, the burn chamber is not in sulfur communication with a sulfur hopper that is separate and distinct from the burn chamber. Instead, the burn chamber may be adapted to hold enough sulfur to allow the generator to produce sulfurous acid for a desired period of time without needing more sulfur to be added to the sulfur being combusted in the burn chamber.

The invention discloses a new N-alkoxy hindered amine compound-tris(1-alkoxy-4-hydroxy-2,2,6,6-tetramethyl piperidinol)phosphite and a preparation method thereof; the compound has the following structural formula described in the specification, wherein in the formula, R is C[n]H[2n+1]-, and n is 1, 2, 3...... The compound can be used as a multifunctional light stabilizer, and has extremely weak alkalinity; due to excellent acid resistance, the compound is especially suitable for agricultural plastic greenhouses and flame retardant plastics. The compound is prepared by esterification of 1-alkoxy-4-hydroxyl-2,2,6,6-tetramethyl piperidinol and PCl3. Compared with conventional similar products, the compound has the advantages of simple structure and easy synthesis.

This invention presents a sulphurous acid generator which employs a concentric hopper and burn chamber in which the burn chamber is surrounded or substantially surrounded by the hopper. The present invention also employs means for substantially eliminating any discharge plume.

The invention discloses a peeling method of walnut kernels. The peeling method of the walnut kernels includes: picking walnut kernel raw materials; dipping the walnut kernel raw materials in a hot NaHCO3 solution; dipping the walnut kernel raw materials in ice water; washing the walnut kernel raw materials; using normal temperature water to rinse the walnut kernel raw materials, and completing peeling. The peeling method of the walnut kernels obtains peeling rate above 98%, and then the walnut kernels after being peeled are complete in particle, white and savory, hard and fragile in texture, smooth in taste, and small in nutrient loss.

The invention discloses a synchronous extracting method of antrodia camphorate total triterpene and polysaccharide. The method comprises the steps of adding alkaline grinding aid into antrodia camphorate sporocarp powder to be ball-milled to obtain ball-milled powder; adding the ball-milled powder into distilled water, conducting a high-speed shearing reaction at constant temperature of 30-70 DEGC and 5,000-10,000 rpm for 5-20 minutes and conducting centrifugal treatment to obtain supernatant; adjusting the pH value of the supernatant to be acid, after uniformly stirring the supernatant, placing the supernatant in a refrigerator at 4 DEG C to stand to be completely precipitated, conducting filtration to obtain filtrate and precipitation, after concentrating and drying the filtrate, obtaining total polysaccharide extract, and after conducting precipitation and natural airing, obtaining total triterpene extract. The extracting rate of antrodia camphorate total triterpene reaches up to 13.72%, increased by nearly 2 folds, and the extracting rate of polysaccharide reaches up to 12.94%, increased by nearly 1 fold.

This invention presents a sulphurous acid generator which employs a combination of novel blending, contact and mixing mechanisms which maximize the efficiency and duration of contact between sulphur dioxide gas and water to form sulphurous acid in an open nonpressurized system, without employing a countercurrent absorption tower. The present invention also incorporates a novel high temperature concrete for use in constructing portions of the present invention.

The invention relates to the technical field of powder coatings, and particularly discloses a powder coating and a preparation method thereof. The powder coating is obtained by jointly extruding modified polyester fibers, a curing agent, filler and color master batch, crushing and sieving, the modified polyester fibers are obtained by sequentially shearing and electrospinning a spinning solution, and the spinning solution comprises the following components in parts by weight: 30-50 parts of a polyester melt and 30-50 parts of a polydopamine glue solution. 4-8 parts of a cross-linking agent, 0.2-0.4 part of an initiator, 2-4 parts of a toughening agent and 4-6 parts of an adsorbent. The powder coating prepared from the modified polyester fiber is high in uniformity, the cured product of the viscose and the cured product of the polyester melt are not easy to separate, and the service life of the coating prepared from the powder coating can be prolonged.

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.

This invention describes a sulfurous acid generator that employs a burn chamber that acts as a sulfur hopper. Generally, the burn chamber is not in sulfur communication with a sulfur hopper that is separate and distinct from the burn chamber. Instead, the burn chamber may be adapted to hold enough sulfur to allow the generator to produce sulfurous acid for a desired period of time without needing more sulfur to be added to the sulfur being combusted in the burn chamber.

The invention discloses a method for extracting isobavachalcone from fresh angelica keiskei. The method comprises the following steps: taking fresh angelica keiskei, pulping, removing chlorophyll, removing tannin with whitewash, carrying out ester liquid-alkali liquid two-phase extraction to remove fat-soluble impurities, carrying out macroporous resin adsorption, washing with water to remove carbohydrate matters, carrying out alcohol-water gradient elution to obtain an isobavachalcone crude product, and finally carrying out secondary recrystallization to obtain an isobavachalcone fine product of which the purity is 75 percent or above. The method has the characteristics that the yield is high, the reaction time is short, the production process is pollution-free, and no side product is generated; the obtained product is simplex in composition, and high in purity, and has important application and academic values in the biological activity fields such as the antineoplastic field, the antidiabetic field, the anti-hyperlipidemia field, the hypotensive field, the antibacterial field and the anti-inflammatory field, particularly a key function in research of the pharmic structure-function relationship of chalcone.

The invention belongs to the technical field of material, and relates to a hot-water resistance polyformaldehyde composition and a preparation method thereof. The hot-water resistance polyformaldehyde composition comprises the following ingredients by weight part: 100 parts of polyformaldehyde, 0.1-0.2 parts of white oil, 0.2-0.4 parts of calcium stearate, 0.3-0.6 parts of main anti-oxidant, 0.3-0.6 parts of auxiliary anti-oxidant, 0.5-1 part of formaldehyde absorbent, 0.2-0.4 parts of formic acid absorbent and 0.1-0.3 parts of nucleating agent. Compared with the prior art, through the boiling by water and aging experiment of the prepared composition, the mechanical property conservation rate is high, aberration and yellowing index change are little, and the hot-water resistance is obviously increased.

The invention provides a nitrogen-sulfur co-doped carbon material with an electro-catalytic oxygen reduction activity and a preparation method of the carbon material, and belongs to the technical field of new material application. The technologic process comprises the following steps: performing ultrasonic cleaning on hairs with acetone, then shearing and crushing the hairs, pouring the hairs into a liner of a reaction kettle, adding analytically pure ammonia water, carrying out a hydrothermal degradation reaction, drying the solution obtained from hydrothermal degradation to obtain solid amino acid, mixing the solid amino acid with a template agent uniformly, thermally decomposing the mixture under an inert atmosphere, removing the template agent with diluted hydrochloric acid from the obtained sample, washing and drying, so as to prepare the nitrogen-sulfur co-doped carbon material. As the carbon material is prepared by taking hairs as the raw materials, the raw materials are simple and accessible, and low in cost; the selected template agent is low in cost and easy to remove; the preparation method is simple in technology; the prepared material is high in nitrogen and sulfur content, and has larger specific surface area, and is rich in pore structures; the nitrogen-sulfur co-doped carbon material prepared by the method shows up excellent properties in fuel cell cathode oxygen reduction and catalysis.

The invention discloses a method for preparing ecabet sodium. The method disclosed by the invention is characterized by comprising the following steps of carrying out sulfonation reaction on dehydroabietic acid (formula III) as a starting material and fuming sulfuric acid to obtain 12-sulfonic dehydroabietic acid (formula II) and enabling the compound shown as the formula II and a sodium-forming agent to form a sodium salt in a solvent system at least containing water to obtain ecabet sodium. By virtue of the method disclosed by the invention, the deficiencies of the prior art are overcome and the method has the advantage of high sulfonation yield and high selectivity in sodium salt forming, simple operation, safety and environment friendliness and is suitable for industrial production.

The invention discloses a preparation method of ecabet sodium, which is characterized in that: the method of the invention uses dehydroabietic acid (formula III) as a starting material, and carries out sulfonation reaction with oleum to obtain 12-sulfonic acid Base dehydroabietic acid (formula II), the compound of formula II and a sodium forming agent form a sodium salt in at least an aqueous solvent system to obtain ecabet sodium. The method of the invention overcomes the disadvantages of the prior art, and has the advantages of high sulfonation yield, high selectivity for sodium salt formation, simple operation, safety and environmental protection, and is suitable for industrial production.