87results about How to "Not easy to absorb moisture and agglomerate" patented technology

The invention relates to a preparation method of low-viscosity octenyl succinic anhydride modified starch. The method comprises the following steps of: (1) adjusting the pH value of a starch emulsion to 8.0-8.5, adding an H2O2 solution, adding a hydrochloric acid solution for neutralizing the starch emulsion till the pH value is 6.5-7.0, washing and drying to obtain low-viscosity oxidized starch; and (2) mixing the low-viscosity oxidized starch with distilled water to obtain a starch emulsion, continually stirring in a constant-temperature water bath, adjusting the pH value to 8.0-8.5, adding 2 mol / L of an MgSO4 solution which accounts for 1 percent of the weight of the starch emulsion, slowly adding octenyl succinic anhydride which accounts for 2-3 percent of the total mass of the low-viscosity oxidized starch obtained in the step (2), adjusting the pH value to 5.5-6.5, washing with water and ethanol respectively twice, and drying to obtain a white finished product. The product has the advantages of stable performance, simple and environmentally-friendly process steps, reduction in preparation time, no residue of oxidant and increase in production efficiency.

The invention discloses a specific fertilizer of ornamental pineapple in the floral fertilizer technological domain, which comprises the following parts: 0-30% calcium ammonium nitrate, 0-60% potassium nitrate, 0-30% monobasic potassium phosphate, 0-8.2% monoammonium phosphate, 2-47% potassium sulfate, 4.3-23% magnesium sulfate, 0-17% aquacare, 0.422-0.823% EDTA-Fe, 0.048-0.096% zinc sulfate, 0.007-0.013%copper sulfate, 0.013- 0.024%sodium molybdate and 0.055-0.110% manganese sulfate.

The invention relates to a kelp extractive nutrition enhancer and a preparation method thereof, which belong to the science and technology field of food. The kelp extractive nutrition enhancer is stable in product quality and rich in nutrition; and the preparation method of the kelp extractive nutrition enhancer is simple in production technology, high in yield and low in cost. The kelp extractive nutrition enhancer provided by the invention comprises the following components in percentage by weight: 25.0%-35.0% of kelp extractives, 45.0%-59.5% of protein powder, 10.0%-15.0% of maltodextrin, 2.0%-5.0% of nutrition yeast powder and 0.5%-1.0% of an antioxidant. The kelp extractive nutrition enhancer provided by the invention is reasonable in component compatibility, low in production cost, rich in nutrition ingredient, less prone to moisture absorption and caking and good in stability, and can be taken as a favorable food nutrition enhancer.

The invention relates to a granular microelements additive for livestock and poultry and a preparation method thereof. One or several soluble salt(s) consisting of iodine, cobalt, selenium, copper, ferrum, manganese and zinc are mixed with the mixed carrier of stone dust and starch at a certain weight ratio, and the granular microelements additive containing singular microelement or a plurality of microelements is obtained after granule fabrication. The preparation method comprises the steps of dissolving the soluble salts containing microelements in right amount of water; uniformly spraying the dissolved soluble salts on the mixed carrier of the stone dust and the starch at a certain weight ratio of the mixed carrier to the microelements; blending uniformly; granule fabricating; drying; sieving; and obtaining the granular microelements additive with grain fineness of 30-100 meshes. The granular microelements additive for the livestock and the poultry has the advantages of good liquidity, quick dissolution, high bioavailability, non-blocking property, easy blending, no dust pollution and minor damage to other nutrient content in feed.

The invention belongs to the field of collagen peptide, and discloses bovine bone collagen peptide and a production method thereof. The production method of the bovine bone collagen peptide comprisesthe steps of impurity removal, smashing and cooking on bovine bone, oil-water separation for cooking liquid, high-efficiency compounding of enzymic preparations, enzymolysis on the condition that thepH value is not adjusted and the temperature condition is not controlled, filtering of an inorganic nanofiltration ceramic membrane to remove components which are easily dissolved and components whicheasily absorb moisture, high-temperature and high-pressure treatment, concentration and drying for powder preparation. According to the method, the enzymolysis pH value does not need to be adjusted,the enzymolysis temperature does not need to be controlled, the enzymolysis time is short, the enzyme addition amount is small, and the enzymatic products are low in molecular weight and are centralized; meanwhile, the prepared bovine bone collagen peptide powder is excellent in water re-dissolubility, and does not easily absorb moisture or get caked in the storage process.

The present invention belongs to the field of food-derived peptides and discloses a collagen peptide, a production method, a production device and an application thereof. The production method of thecollagen peptide comprises steps of coarse collagen solution heating, cooling, high-efficiency compound enzyme preparation enzymatic hydrolyzing, membrane filtering, concentrating, ultra-high pressurehomogenizing, and ultra-high temperature instantaneous sterilizing and drying. The high-efficiency compound enzyme preparation enzymatic hydrolyzing uses a compound enzyme preparation comprising compound protease, alkaline protease, neutral protease, flavor protease, animal proteolytic enzyme and an enzyme activator, and the enzyme activator is dithiothreitol and / or beta-mercaptoethanol. The provided method does not need to adjust pH value of the enzymatic hydrolyzing, does not need to control enzymatic hydrolyzing temperatures, is short in enzymatic hydrolyzing time and small in enzyme addition amount, and enables the enzymatic hydrolyzed product to be low and concentrated in molecular weight. The prepared collagen peptide powder is free of fishy smell, extremely excellent in water resolubility and also not liable to absorb moisture and agglomerate during storage process, and can be used in solid beverages, effervescent tablets, chewable tablets, health-care foods and feature-beautifying and skin-protecting products.

The invention relates to a high hydroscopic polyvinyl alcohol fiber and a preparation thereof. The compositions of the high hydroscopic polyvinyl alcohol fiber are respectively polyvinyl alcohol, crosslinking agent and flow promoter with the weight percent of 90-99.5 to 0.01-0.05 to 0-2; the preparation comprises the following steps of: (1) using room temperature water-soluble polyvinyl alcohol with the crosslinking agent and the flow promoter inside to prepare spinning solution with the weight percentage concentration between 20 and 40 percent; (2) acquiring fiber containing the crosslinking agent via the technology of dry spinning when the temperature of the spinning solution is at 80 to 100 DEG C, and acquiring the high hydroscopic polyvinyl alcohol fiber via the heat treatment for 2 to 10 minutes at 120 to 160 DEG C. The product of the invention is not easy to absorb moisture and be caked when stored in the air, is easy for storing, has high water absorbing capacity, enables the absorption ratio for deionized water over 160 times and the absorption ratio for physiological saline over 45 times, and has easily obtained materials and simple processing technique.

The invention relates to probiotics powder for regulating constipation and a preparation method thereof, and belongs to the technical field of food processing and production. Raw materials include a plurality of beneficial substances of lactobacillus rhamnosuslyophilized powder, bifidobacterium longum lyophilized powder, lactobacillus plantarum lyophilized powder, lactobacillus acidophilus lyophilized powder, bifidobacterium breve lyophilized powder, bifidobacterium lactis lyophilized powder, sorbitol, resistant dextrin, lactitol, oligofructose, stachyose and the like. At the same time, the preparation process is improved, and the raw materials are separately divided into several parts to prepare mixed powder and then further mixed with other raw materials. An obtained solid beverage not only has a certain conditioning effect on the constipation, but also has excellent product properties, and is not prone to moisturize and agglomerate. The solubility, uniformity and full powder yield are high.

The invention relates to a method for producing super water-absorbing fiber by modifying polyvinyl alcohol fiber, which includes the following steps: the water-soluble polyvinyl alcohol fiber is esterified in an organic solvent by the maleic anhydride; wherein, the weight percent concentration of the maleic anhydride in the organic solvent is 5-25%, the esterification time is 1-5 hours and the temperature is 50-90 DEG C, then alkali treatment is carried out to the fiber, the fiber that is treated in the alkali solution is washed in the methanol or ethanol, and the final drying process is carried out at the temperature of lower than 80 DEG C. The super water-absorbing fiber can absorb a large amount of water but does not dissolve in the water, is hard to absorb the moisture or agglomerate in the air and is easy to store like the polyvinyl alcohol fiber made of fiber-spinning process; the fiber provided by the invention can absorb deionized water, the weight of which is higher than the self-weight of the fiber by more than 150 times.

An efficient fire-extinguishing agent of superfine powder is prepared from ammonium phosphate, SiO2 and stearate. Its advantages include small granularity less than 10 microns, large specific surface area, high flowability and dispersity, high fire extinguishing effect, no poison and no pollution.

The invention discloses smooth moisturizing, granulating and cleaning powder which is prepared from the following materials in parts by weight: 10-60 parts of mannitol, 2-20 parts of sodium cocoyl glutamate, 2-20 parts of sodium lauroyl glutamate, 2-20 parts of sodium myristoyl glutamate, 3-20 parts of sodium cocoyl isethionate, 2-20 parts of corn starch, 0.5-3 parts of cassava starch, 0.3-3 parts of sodium chloride, 0.1-2 parts of hydroxypropyl methyl cellulose, 0.1-1 part of dipotassium glycyrrhizinate, 0.05-0.3 part of allantoin, 0.05-0.5 part of polylysine, 0.02-0.2 part of sodium hyaluronate, 0.05-0.3 part of methylsesquisiloxane and 0.5-5 parts of a portulaca oleracea extract. The smooth moisturizing, granulating and cleaning powder disclosed by the invention takes a mild amino acid surfactant as a main cleaning agent, does not raise during the use, is quick in disintegrating speed when being in contact with water, smooth during the use and mild and inirritative to skin and eyes, has cleaning and moisturizing functions and solves the problems of moisture absorption and agglomeration in the placing process of the powder. Meanwhile, the invention provides a preparation method of the smooth moisturizing, granulating and cleaning powder.

The invention provides an iodine, selenium and cobalt composite package for animal feed and a preparation method and an application method thereof, wherein the preparation method comprises but is not limited to the following steps: weighing the powder of iodine compound, selenium compound and cobalt compound according to the requirement of an animal, and uniformly mixing the compounds with water to obtain injectable suspension; and performing spray drying on the injectable suspension to obtain the iodine, selenium and cobalt composite package. By the spray drying, the iodine, selenium and cobalt composite package prepared by the method has regular particles and no powder on surface so as to reduce the dust during premixing feed additives and the loss of the product when the feed additivesare added into the animal feed, and maintain and optimize the production environment of production staff, and improve the mixing uniformity of the feed and the iodine, selenium and cobalt composite package in the processing process of the animal feed.

The invention discloses a low-compressive creep and high temperature-resistant ethylene propylene rubber material and a preparation method thereof, and belongs to the technical field of rubber. The rubber material comprises the following components in parts by weight: 100 parts of raw ethylene propylene rubber, 5 parts of zinc oxide, 1.2 parts of stearic acid, 2 parts of an antiager 445, 4-8 partsof Ative CHO, 45-55 parts of fast extruding carbon black N550, 5-10 parts of a softening and plasticizing agent S2550, 1.5-2.0 parts of a crosslinking auxiliary agent N308E and 6.0-8.0 parts of a vulcanizing agent GF-45. The rubber material has excellent high temperature resistance, has good physical properties after aging at 175 DEG C, has a significant advantage of low compression set, and meets performance requirements of German Volkswagen PV3330 and PV3307 standards on the compression set.

The invention discloses a preparation method of xylitol and maltitol eutectic, which comprises the following steps that raw xylitol and raw maltitol are mixed at a mass ratio of (10:1)-(2:1), and evaporated and concentrated to a molten state that the mass fraction of solid in a mixture is above 98%; a molten-state xylitol and maltitol mixture is obtained, cooled to 120-160 DEG C, mixed with a seed crystal, and stirred sufficiently, so that the molten-state xylitol and maltitol mixture is eutectic; cooling and drying are performed after uniform mixing; the temperature is reduced to 30-40 DEG C; smashing is performed; and the xylitol and maltitol eutectic is obtained. The method solves the problems that the kneading difficulty is great, the ageing time is long, the smashing is difficult, the crystallization speed is low, the efficiency is low, and mass production is not easy in the existing production technology of the eutectic. The xylitol and maltitol eutectic prepared by the method has good homogeneity, is more suitable for preparing chewing gum and preforming, and has good economic benefits and social significance.

The invention belongs to the technical field of deep processing of marine products, and relates to a preparation method of sea cucumber peptides, which comprises the following steps: (1) grinding sea cucumbers into pulp; (2) uniformly mixing the sea cucumber primary pulp with deionized water, heating until denaturation, cooling, and adding compound protease for enzymolysis; (3) after the enzymolysis is finished, adding activated carbon to remove odor, then adjusting the pH value to 6.0-7.0, and heating to inactivate the enzyme; (4) filtering by adopting an inorganic nanofiltration ceramic membrane; (5) freeze drying; and (6) preparing granules. The process is simple, the extraction rate is high, and the enzymolysis condition control and the improvement of the taste of the sea cucumber peptides are facilitated; enzymolysis is thorough, the content of small molecule peptides is high, the peptide content in the product components reaches 80% or above; and the peptide molecular weight distribution result is that the content of peptides with a size of 1000Da or above is 6%, and the content of small molecule peptides with a size of 1000Da or below is 94%. Through a biological enzymolysis technology, the sea cucumbers are hydrolyzed by biological enzymes to form active ingredients which are all soluble in water, the active ingredients are absorbed completely and rapidly, the content of small peptides in the product is high, and absorption and utilization of the active ingredients of the sea cucumbers are facilitated.

The present invention discloses traditional Chinese medicine granules for avian colibacillosis treatment, wherein raw materials comprise, by crude drug, 30-90 g of gypsum, 3-20 g of honeysuckle, 2-30 g of figwort root, 2-15 g of baikal skullcap root, 2-15 g of unprocessed rehmannia root, 2-15 g of weeping forsythia fruit, 2-15 g of cape jasmine, 2-15 g of Chinese gentian root, 2-30 g of manyflower gueldenstaedtid herb, 2-40 g of indigowoad root, 2-15 g of common anemarrhena, 2-15 g of creeping liriope, and a proper amount of an excipient. The preparation method for the cooling-relieving therapy granules comprises: (1) adopting enzyme extraction on the drugs in the formula to prepare extract powder, (2) adding the excipient and mixing, and (3) carrying out granulation, drying and sub-packaging to obtain the finished product. The granule agent has functions of heat clearing, detoxication, yin nourishing and dysentery treatment, and has characteristics of high active ingredient content, significant therapy effect, easy taking and no toxic and side-effect.

The invention belongs to the field of sea cucumber peptide, and discloses a sea cucumber peptide and a production method thereof. The method comprises the steps that water is added to a sea cucumber raw material, homogenated and heated, high-efficient compound enzymic preparation enzymolysis is conducted under the conditions that the pH value is not adjusted and the temperature is not controlled,components which are hard to dissolve and easily absorb dampness are filtered and removed by an inorganic nanofiltration ceramic membrane, high-temperature and high-pressure processing is conducted, and sea cucumber peptide powder is prepared after concentration and drying are conducted. The method has the advantages that the enzymolysis pH value does not need to be adjusted, the enzymolysis temperature does not need to be controlled, the enzymolysis time is short, the enzyme adding amount is less, the molecular weight of enzymolysis products is low and concentrated, and the water resolubilityof prepared sea cucumber peptide powder is excellent, and dampness is not easily absorbed and blocks are not easily formed in the storage process.

The invention belongs to the field of collagen peptide, and discloses deep-sea fish collagen peptide and a production method thereof. The production method includes successively performing soaking treatment on deep-sea fish skin particles by adopting a NaOH solution and a HCl solution; adding water and utilizing a colloid mill to prepare into a crude collagen solution; performing heating processing, and performing enzymatic hydrolysis by using a high efficiency compound enzyme preparation under a natural condition of adjusting pH values and controlling temperatures; filtering and removing components which are not easy to dissolve and easy to absorb moisture through an inorganic nanofiltration ceramic membrane; and performing high temperature and high pressure treatment, concentration and drying to prepare powder. The method is short in enzymatic hydrolysis time, less in enzyme addition, and low and concentrated in molecular weight of enzymatic hydrolysate without adjusting the pH valueof enzymatic hydrolysis and controlling enzymatic hydrolysis temperatures; and the prepared deep-sea fish collagen peptide powder is excellent in water re-solubility, and is not easy to absorb moisture and cake during storage.

The invention relates to a method for producing natural seasoning with an antihypertensive effect by processing a byproduct using agaricus bisporus. The method comprises the following steps: using a soup produced by cooking agaricus bisporus as a raw material, adopting concentration, ultrafiltration membrane fractionation, column chromatography, addition of baking soda and reaction, spray granulation, anti-caking treatment and packaging and other modern food and bio-engineering technologies to produce the natural seasoning with the antihypertensive effect. The invention provides a technical scheme capable of removing special odor and heavy metals in the agaricus bisporus cooking soup, the production cost is low, the technical problem that mushroom powder is easily caked is solved, the polysaccharide retention rate is more than 85%, the obtained natural mushroom seasoning has the advantages of delicious taste, no mushroom odor, rich nutrition, quality safety, uneasiness in caking, and long shelf life, and the animal experiment proves that the natural seasoning has a good antihypertensive effect.

The invention discloses a solid bottle-washing additive. The solid bottle-washing additive comprises the main components of sodium gluconate, urea, sodium dihydrogen phosphate, sodium triphosphate, Triton DF-16, Surfynol DF-110D, Surfynol DF-220 and white carbon black. The additive finished product is good in color and luster, powder is dry, caking is not likely to occur, and the solid bottle-washing additive has good fluidity and is convenient to use and easy to add. Meanwhile, the bottle-washing additive is free of foams in the whole bottle-washing process and capable of rapidly permeating into adhesive inside bottle marking paper, in this way, the whole marking paper falls off, a washed bottle is bright and transparent without blurring, no adhesive traces are left on the exterior of the bottle, and no residues are left inside the bottle.

The invention relates to the technical field of plastic pipe fittings, in particular to an antibacterial and flame-retardant polypropylene pipe fitting and a preparing method thereof. The pipe fittingis prepared from, by weight, 70-90 parts of polypropylene, 0.5-1.0 part of compound antibacterial agent, 1.5-3.5 parts of flame retardant, 0.3-0.8 part of antioxidant and 1.0-3.0 parts of thermal stabilizer. By selecting the proper raw materials and adding the compound antibacterial agent and the compound flame retardant, the polypropylene material with flame-retardant and antibacterial compoundperformance is obtained; meanwhile, by adding the antioxidant, the thermal stabilizer and other auxiliaries, the processing performance of the antibacterial and flame-retardant polypropylene materialcan be improved, the thermal resistance and ageing resistance of the material are improved, and the service life of the pipe fitting can be effectively prolonged.

The invention discloses a compound health herb tea, which is prepared by the following steps: primitive tea is humidified by steam, and the surface moisture is drained; minor ingredient dry power is prepared by micronizing minor ingredient to more than 500 meshes; and then the minor ingredient dry power is sprinkled into the base tea in the mode of stirring during charging so that the minor ingredient dry power is adsorbed on the base tea; the base tea adsorbing the minor ingredient dry power is baked till drying or roasting to prepare the compound health herb tea; wherein the contents of eachcomposition is as follows according to the weight percentage: 85-90% of base tea, 10-15% of the minor ingredient dry power. The invention takes the traditional prototype tea as the base tea, substitution tea or Chinese medical herb as the minor ingredient, changes the product form of the traditional blending tea in the mode of the minor ingredient dry power adsorbed on the base tea, keeps the shape of the tea, is difficult to adsorb moisture and agglomerate, is convenient for the combination and matching of various teas, substitution tea or Chinese medical herb, increases the added value of products, and is beneficial for the development of the tea products, health herb tea, etc.

The invention discloses onion and chicken juice seasoning powder and a preparation method thereof. The onion and chicken juice seasoning powder consists of the following raw materials in percentage by weight: 45-75% of salt, 9-19% of onion powder, 7-16% of white granulated sugar, 5-10% of garlic powder, 2-7% of fresh chicken powder, 2-7% of black pepper powder, 2-6% of yeast powder, 1-5% of scallion leaves, 1-4% of white pepper powder, 0.5-3% of malt, 0.1-3% of inosine 5'-(trihydrogen diphosphate) disodium salt, 0.1-3% of guanosine 5'-diphosphate disodium salt, 0.1-3% of hot green pepper powder, 0.1-3% of disodium succinate, 0.1-2% of palm oil, 0.1-2% of silicon dioxide, 0.1-1% of vitamin E, 0.1-1% of sodium hexametaphosphate and 0.01-1% of citron yellow. The onion and chicken juice seasoning powder has various distinct delicate fragrance, after an appropriate amount of the onion and chicken juice seasoning powder is added for seasoning during cooking, the fragrance can be obviously enhanced, and the fragrance can perform touch to start the taste function of people; and foods cooked through adding the seasoning powder can significantly increase the secretory function of salivary glands after being put in mouths, and the appetite can be stimulated.

The invention belongs to the technical field of food processing and relates to a five-cereal red date flour and a preparation method thereof. The five-cereal red date flour comprises the following rawmaterials: 65%-75% of five-cereal powder, 20%-25% of red date powder and 5%-8% of ginger powder. The five-cereal red date flour is prepared according to the steps of preparing the five-cereal powder,steaming, preparing the red date powder and blending, wherein the red date powder is prepared according to a three-stage drying method. According to the invention, the production process is simple, the cereals rich and complete in nutrition are scientifically blended with the red dates, any additives are not added, the five-cereal red date flour is green and healthy, and the end product tastes mellow, is strong in red date fragrance and is convenient for eating.

The invention discloses organic fertilizer, which is prepared from a main material and an auxiliary material, wherein the main material is prepared from plant straw, bean pulp, municipal refuse and river sludge; and the auxiliary material is prepared from clear water, deodorant, alcohol, em liquid, acetic acid, phosphorite powder, dolomite, mica powder, peat soil, urea, potassium sulfate and lime.By using the organic fertilizer, through adding the urea, the potassium sulfate and the lime into the auxiliary material and adding partial components of inorganic fertilizer into the organic fertilizer, the fertilizer supply speed can be regulated through cooperative use; the production cost is decreased; the organic fertilizer has the characteristics of the mutual assistance of rapid release and slow release and the combination of long acting and short acting; the dynamic equilibrium of fertilizer release and crop absorption can be realized; the supply of macro-element, medium-element and micro-element fertilizer is regulated; the transverse equilibrium of a nutritional ingredient is realized; meanwhile, the urea is added into soil and can be suitable for various kinds of soil; the nitrogen content in the soil is supplemented; the potassium sulfate is added and can be used as base fertilizer; the moisture absorption and the agglomeration are difficult and further the potassium content in the soil is supplemented; the lime is added to improve the structure of the soil; and the acidity of the soil can be also neutralized.

The invention discloses a herbal veterinary medicine for preventing and treating chicken heat-toxin symptoms caused by Escherichia coli infection. The herbal veterinary medicine comprises the following raw materials: on the basis of the amount of crude drugs, 30 to 90 g of gypsum, 3 to 20 g of honeysuckle flower, 2 to 30 g of figwort root, 2 to 15 parts of baical skullcap root, 2 to 15 g of raw rehmannia root, 2 to 15 g of weeping forsythia capsule, 2 to 15 g of cape jasmine, 2 to 15 g of Chinese gentian, 2 to 30 g of Gueldenstaedtia multiflora Bunge., 2 to 40 g of isatis root, 2 to 15 g of common anemarrhena rhizome and 2 to 15 g of dwarf lilyturf tuber. The herbal veterinary medicine is a granule which further comprises an excipient. A preparation method for the summer-heat-removing granule comprises the following steps: (1) extracting the above-mentioned raw materials so as to prepare extract powder; (2) adding the excipient and carrying out uniform mixing; and (3) successively carrying out granulation, drying and split charging so as to obtain the finished granule. The granule provided by the invention is named as summer-heat-removing granule, is capable of clearing heat, removing toxins, nourishing yin and checking dysentery and has the advantages of a substantial effect, convenience in administration and no toxic and side effects.

The invention provides a preparation method of sodium butyrate granules and a tail gas treatment method of the sodium butyrate granules. The invention relates to the field of preparation of non-antibiotic growth-promoting feed additives. The preparation method mainly comprises the following steps: preparing a sodium butyrate raw material, mixing the components, extruding the mixture into strips, granulating the mixture, and performing shot blasting and drying. The invention also relates to the treatment method for tail gas in preparation of the sodium butyrate granules. The treatment method comprises the following steps: collecting tail gas obtained by spray drying, treating the tail gas through a heat exchanger so as to collect heat in the tail gas, and then treating the cooled tail gas through a two-stage water film scrubber tower so as to obtain clean tail gas; and finally, performing heat exchange through the heat exchanger, and compensating heat for the storage tank through the jacket and discharging the residual clean gas. The preparation method of the sodium butyrate granules is safe, simple, convenient, good in controllability, environment-friendly and reliable.

The invention relates to a levo-oxiracetam particle. The levo-oxiracetam particle is characterized by being prepared from the following raw and auxiliary materials by weight: 1 part of levo-oxiracetam, 0.5-1.0 part of L-cysteine, 0.7-1.3 parts of mannitol, 0.5-1.2 parts of microcrystalline cellulose, 1.0-1.5 parts of sodium carboxymethyl cellulose, 1.1-1.5 parts of lactose, 0.12-0.16 part of talcum powder, 0.6-1.2 parts of polyethylene glycol 4000, 0.7-1.3 parts of hydroxypropyl methylcellulose, and 8-15 parts of a starch slurry with a volume fraction of 6%-8%. The levo-oxiracetam particle prepared according to the invention has the advantages of small impurity increase of only 0.03% during preparation, small powder layer content, uniform particle size, good fluidity, a repose angle of less than 37 degrees, a load difference of less than 5%, good storage process stability, difficult moisture absorption and caking, and a shelf life up to 24 months.