54results about How to "Has industrial production value" patented technology

The invention discloses a method for preparing optically-pure citronellol from neral or geranial. According to the method, an optically-pure transition metal catalyst is used, and neral or geranial is subjected to selective asymmetric hydrogenation for obtaining the optically-pure citronellol, the chemical selectivity reaches 98%-99.9%, and the stereoselectivity reaches 96%-99%, and the defects that raw materials are limited, the synthesis route is long, cost is high and the like in the process for synthesizing optically-pure citronellol in the prior art are solved.

The invention discloses a preparation method of hydroxypropyl starch resistant dextrin, and relates to the technical field of resistant dextrin. According to the method, hydroxypropyl starch is used as a raw material, prepared starch paste has high transparency, high fluidity, weak retrogradation performance, high stability and good freeze-thaw stability, then alpha-amylase is added for hydrolysis, the solubility of glucose is improved, the content of free glucose in the product can be effectively reduced, and the content of the resistant dextrin is increased; then a starch branching enzyme isadded, the digestion resistance of the starch paste is improved, and therefore the content of the resistant dextrin is more effectively increased. The preparation process for preparing the resistantdextrin by using the hydroxypropyl starch is simple, the yield is high, detection is carried out by means of the method which accords with the national food safety standard GB 5009.88-2014, the content of the resistant dextrin reaches 80% or above, the content of free glucose is 10% or below, and the method has industrial production value.

The invention discloses a preparation method of a ceramic particle reinforced metal-based composite material. The preparation method comprises the following steps of: firstly preparing ceramic particle and resin mixed slurry, carrying out layer-by-layer stacking formation by using a photo-curing 3D (three-dimensional) printing technique to prepare a ceramic particle blank, and carrying out vacuumdegreasing and high-temperature sintering to obtain a ceramic particle preform with a high bonding property; and preparing the ceramic particle reinforced metal-based composite material with a complexspace structure by combining a pressureless infiltration method. According to the preparation method, three-dimensional modeling software is adopted for designing and optimizing the space structure of the preform, the volume fraction of particles is controlled, and the wettability of molten metal and ceramic particles is improved by communicating the inner side faces of the three-dimensional structure; a blank prepared through photocuring 3D printing is not prone to cracking or deforming; after degreasing and sintering, the bonding strength and compactness of the structure of the preform areguaranteed, the collapsing in the melt infiltration process is avoided, the rate of finished products is increased, and the production cost is reduced.

The invention relates to the technical field of timber adhesives, and in particular to a method for preparing a corrosion-resistant soybean protein adhesive by using sodium tetraborate as a preservative. The steps of the method are as follows: after sodium tetraborate and water are added into a reaction vessel and sufficiently dissolved, soybean protein powder and sodium dodecylbenzene sulfonate modifier are then added in sequence, modification reaction takes place by heating under the condition of agitation, and after the reaction ends, the corrosion-resistant soybean protein adhesive is obtained by cooling. The storage and transportation period of the soybean protein adhesive prepared by the invention can reach more than six months under a normal temperature, the soybean protein adhesive is nontoxic, and has a good bonding effect, the bonding strength can be up to 3.5Mpa, and the water-resistant strength reaches 1.4Mpa. Moreover, the preparation process is simple, low in cost and environment-friendly, and is suitable for industrialized production.

The coenzyme Q10 synthesizing process with coenzyme Q0 hydroquinone and isodecyl alcohol deca-isopentyl alcohol of purity not lower than 95 % as material includes dewatering and condensation reaction at room temperature under the catalysis of trifluoro methane sulfonic acid in no oxygen environment to obtain coenzyme Q10 hydroquinone, the oxidation of the reacted product without passing through any treatment with hydrogen peroxide and water solution of ferric trichloride to obtain crude coenzyme Q10 product, and crystallization of the crude coenzyme Q10 product in acetone to obtain yellow coenzyme Q10 product powder in content over 99 % and yield over 65 %. The present invention has simple operation, easy purification of the product, high yield, mild reaction condition, safe and controllable production process and industrial production value.

The invention discloses diphenylphosphine cumyl phenolic ester and a synthetic method thereof. According to the method, shielding gas is introduced into a mixture of 2,4-bis(1-methyl-1-phenylethyl)-pheno and a solvent, mixed liquid of chlorodiphenylphosphine and solvents is added in a dripping mode, and thermal reaction is carried out after addition; after the thermal reaction is over, the protective gas is stopped from being introduced, temperature is lowered, the solvents are removed through distilling at normal pressure or lower pressure, and light yellow thick liquid is obtained; a crystallizing agent is added to the thick liquid, then a proper amount of activated carbon is added, heat preservation is carried out for 30 min in a reflux state, filtration is carried out at a high temperature, white solid is separated after filtered liquid is cooled, and the diphenylphosphine cumyl phenolic ester is obtained after filtering and drying. The synthetic process overcomes the defect that acid-binding agents are used in conventional phosphite ester compound synthesis reaction, by-products generated due to the reaction are actively extruded by the introduced protective gas, and the procedures of suction filtration, washing, generated amine salt filtration and removal and the like are omitted. Besides, the diphenylphosphine cumyl phenolic ester is directly separated by means of the crystallizing agents, so that the environment pollution problem caused due to the fact that the diphenylphosphine cumyl phenolic ester is obtained through multiple times of washing by means of organic solvents in the prior art is solved.

The invention provides a simple preparation method of felbinac. The method comprises the following steps: taking biphenyl and ethyl oxalyl monochloride as initial raw materials; carrying out Friedel-Crafts reaction under the action of aluminum trichloride to generate biphenylethyl glyoxylate under the condition of low temperature; then carrying out alkaline hydrolysis to obtain felbinac salt; carrying out Huang-Minlon reaction reduction and acidification to obtain the felbinac. The method has the advantages of no need of intermediate separation, simplicity and convenience in operation, environment friendliness, high yield and industrial production value.

The invention relates to an oligopeptide-1 biological hair care membrane for repairing hair follicles. The biological hair care membrane is prepared from the following raw materials in parts by weight: oligopeptide-1 of which the biological activity in the biological hair care membrane is 20-200IU/ml, 2-7 parts of an emulgator, 0.5-2.5 parts of a conditioner, 2-4 parts of a thickening agent, 1-4 parts of a fat increasing agent, 0.1-0.5 part of a preservative, 0.1-0.5 part of a chelating agent, 1-7 parts of natural plant extract and 0.1-0.3 part of spice, wherein the 1-7 parts of natural plant extract specifically includes 1.5-2 parts of ginger juice extract, 1 part of ginseng extract, 1-2 parts of polygonum multiflorum extract and 1-2 parts of semen coicis extract. The invention has the beneficial effects that the invention develops a novel biological hair care membrane for repairing hair follicles and promoting the hair follicle to grow and develop hair; the oligopeptide-1 component contained in the biological hair care membrane is capable of effectively repairing hair follicles and restraining the alopecia phenomenon caused by the damaged and aged hair follicles; the oligopeptide-1 component has excellent hair-generating and hair-developing functions for the alopecia phenomenon.

The invention discloses a method for synthesizing a micro-powder cubic boron nitride single crystal, and belongs to the technical field of superhard material synthesis. The method comprises the following steps of: (1) taking hBN serving as a raw material, taking a mixture of Li3BN2, Li3N and NH4Cl serving as a catalyst, uniformly mixing the catalyst and the hHBN according to a mass ratio of (10-20): (90-80) and pressing into a cylinder; (2) putting the cylinder pressed in the the step (1) into a graphite heating pipe to assemble into a synthetic rod, and then putting the synthetic rod into a pyrophyllite assembly block to form a synthetic block; (3) placing the assembly block in the step (2) into a high-pressure chamber of a cubic press, and carrying out pressure heating at 70-83 MPa and 4.0-4.8 kw; and (4) taking out a high-temperature and high-pressure composition obtained in the step (3), and obtaining the cubic boron nitride crystal through crushing, water injection soaking, shaking table selection and conventional acid-base treatment.

The invention discloses a synthesis method of Fenpropidin. The synthesis method comprises the steps of: chloridizing tertiary butyl-beta-methyl phenylpropanol by utilizing a hydrogenation product of 4-tert-butyl phenyl isobutyraldehyde through sulfoxide chloride in the presence of a catalyst DMF (Dimethyl Formamide), and reacting with piperidine to obtain a target product, namely Fenpropidin. The synthesis method is simple in process and high in reaction yield and product content, is free of environmental pollution and has the advantages of simplicity in operation, simple device, less three wastes, low cost and the like.

The invention belongs to the technical field of food packaging paper preparation, and particularly relates to a water-based coating for food packaging paper and a preparation method of the water-based coating. The water-based coating for the food packaging paper is prepared from the following raw materials in parts by weight: 3 to 10 parts of dialdehyde starch, 5 to 15 parts of soybean protein isolate powder, 200 parts of water, 5 to 15 parts of silica sol and 0.2 to 0.3 part of coupling agent KH560. The preparation method comprises the following steps: proportionally adding dialdehyde starch, soybean protein isolate powder and water into a reactor, uniformly stirring and mixing, adding sodium hydroxide to adjust the pH value, and heating for gelatinization; and after the gelatinization reaction is finished, cooling the gelatinized material to normal temperature, adding silica sol and a coupling agent, and uniformly mixing to obtain the water-based coating paint for producing food packaging paper and paperboards. The food packaging paper produced by the coating paint prepared by the invention is high in strength, good in water resistance, green and environment-friendly, and the preparation process is simple in process, low in cost and suitable for industrial production.