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2419 results about "Colloid mill" patented technology

A colloid mill is a machine that is used to reduce the particle size of a solid in suspension in a liquid, or to reduce the droplet size in emulsions. Colloid mills work on the rotor-stator principle: a rotor turns at high speeds (2000 - 18000 RPM). The resulting high levels of hydraulic shear applied to the process liquid disrupt structures in the fluid. Colloid mills are frequently used to increase the stability of suspensions and emulsions, but can also be used to reduce the particle size of solids in suspensions. Higher shear rates lead to smaller droplets, down to approximately 1 μm which are more resistant to emulsion separation.

Waterproof roll capable of carrying out chemical bonding and physical crosslinking synergism with concrete

The invention discloses a wet-laying and pre-laying waterproof roll which is made by the following processes: dipping and coating a modified asphalt compound on a blank body, controlling the thickness and sizing, coating a membrane, rolling, and the like, wherein the modified asphalt compound contains modified asphalt, a plasticizer, an antioxidant, a functional auxiliary agent and a filling gent. A preparation method of the waterproof roll comprises the following steps: putting substrate asphalt in a reaction pot, adding a thickening agent, irregular polyethylene and styrene-polybutadiene-styrene segmented copolymer, evenly mixing, heating and stirring for 1.5-2 hours, then reducing the temperature to about 180 DEG C, adding padding, the plasticizer, the antioxidant and the functional auxiliary agent into the reaction pot and stirring for 0.5-1h, evenly mixing and modifying, then conveying into a colloid mill for repeatedly milling to the material, then dipping and coating the modified asphalt on the blank body, controlling the thickness, sizing, coating the membrane and rolling, and finally preparing the waterproof roll which has excellent performance and can carry out chemical bonding and physical crosslinking synergism with the concrete, namely, a CPS waterproof roll for short.
Owner:XI NIU PI WATERPROOFING TECH CO LTD

Layered double hydroxide and preparation method thereof

The invention relates to a layered double hydroxide and a preparation method thereof, belonging to the technical field of metal hydroxide preparation. A chemical formula of the layered double hydroxide is as follows: (M1(1-x)M2x(OH)2)(A<n->)x/n), wherein x is larger than or equal to 0.2 and smaller than or equal to 0.33; M1 represents any one or more of divalent metal ions including Mg<2+>, Zn<2+>, Ni<2+>, Co<2+>, Ca<2+>, Cu<2+>, Fe<2+> and Mn<2+>; M2 represents any one or two of trivalent metal ions including Fe<3+> and Al<3+>; A<n-> represents any one of interlayer anions including CO3<2->,NO3<->, Cl<-> and SO4<2->; and the grain size ranges from 12 nm to 80 nm. The invention has the advantages that the preparation method is a direct method for preparing the layered double hydroxide with high crystallinity, layered structure regularity, wide application range and adjustable particle size. The preparation method comprises the following steps: obtaining highly dispersed metal nanoparticle sol by utilizing the action of colloid mill axial shear force and the sodium borohydride reducibility, and then performing slow oxydrolysis in a hydrothermal system, and the like to generate thenano layered double hydroxide with layered structure regularity and adjustable particle size. The method has the advantages of wide application range, low cost, simple operation and environmental protection.
Owner:BEIJING UNIV OF CHEM TECH

Components and preparation method of beta-lactam injection

The invention discloses the components and preparation method of beta-lactam injection. The beta-lactam injection comprises 5 to 20 percent of beta-lactam antibiotics, 0.05 to 5 percent of suspending agent, 0.005 to 0.3 percent of antioxygen, 0.1 to 0.2 percent of nonionic surfactant and the balance of vegetable oil or grease for injection. The injection can be used for preventing and curing animal bacterial infectious diseases and can be injected hypodermically or in muscle and be applied through breast for a few times. The preparation method provided by the invention comprises: firstly, making the antibiotics and the antioxygen into micro powder and making the suspending agent into fine powder; secondly, adding the vegetable oil or grease for injection, which is sterilized at high temperature, into the fine powder of the suspending agent, heating the mixture, uniformly mixing the mixture and keeping the mixture in a sterile environment to cool the mixture to room temperature for later use; and finally, transferring the prepared oil or grease added with the suspending agent to a colloid mill, adding medicament micro powder, the antioxygen and the non-ionic surfactant with stirring, and performing uniform mixing and sterilization to obtain the beta-lactam injection.
Owner:LUOYANG HUIZHONG ANIMAL MEDICINE

Magnesium-alloy metal-type casting coating and preparation method thereof

The invention relates to a magnesium-alloy metal-type casting coating and a preparation method thereof. Magnesia and forsterite are used as refractory aggregates; titania, asbestos powder or talcum powder or diatomite, and the like are added as heat-insulation aggregates; a mixed caking agent with favorable high-temperature caking property and a compound suspending agent are selected; and boric acid is added as a flame retardant. The preparation method comprises the following steps: mixing the magnesia, the forsterite, the titania, and the asbestos powder or talcum powder or diatomite, and preparing A after ball milling; mixing the caking agent and bentonite, and adding water to activate so as to obtain B; mixing the boric acid, sodium carboxymethyl cellulose and polyacrylamide, and addingwater to activate so as to obtain C; and finally, mixing A, B and C, and carrying out ball milling or colloid milling for more than 30 minutes to obtain the magnesium-alloy metal-type casting coating. The coating has the advantages of favorable heat insulation, caking property, coating property, flame retardance, stability and durability, is beneficial to continuous production and convenient forobtaining magnesium-alloy metal-type castings with favorable surface quality and superior performance, and prolongs the service life of moulds.
Owner:SHANGHAI JIAO TONG UNIV

Production method for spray-drying Chinese yam powder without using sulfur to protecting color

The invention relates to a production method for spray-drying Chinese yam powder without using sulfur to protecting color. The Chinese yam is prepared from fresh Chinese yam and is obtained by the steps of microwave enzyme deactivation, shelling, slicing, color protection, pulping, grinding, vacuum condensation, homogenization, spray-drying, vacuum packaging and microwave sterilization. The Chinese yam raw material is deactivated by microwave at temperature of 60 DEG C, cut to slice, and is soaked in sulfur-free color protection liquid containing phytic acid, Ethylenediaminetetraacetic acid disodium, vitamin C and citric acid, the color protection liquid and the Chinese yam slice is pulped together and is milled by a colloid mill, the Chinese yam slurry is concentrated by a vacuum condensation equipment until the content of solid is 15-25% and is homogeneously processed, homogenized liquid material is sprayed and dried by a centrifugal spray-drying machine, the obtained Chinese yam powder is packaged by vacuum and is sterilized by a microwave sterilization equipment to prepare the sulfur-free Chinese yam powder product. The invention has high production efficiency and low cost, the produced Chinese yam product has good color, high safety and complete nutrient composition, and can applied for field such as foodstuff, medicine and cosmetic product.
Owner:袁书林

Walnut powder and production method thereof

InactiveCN101690596AReduce the degree of protein denaturationRealize comprehensive utilizationFood preparationSocial benefitsSolubility
The invention provides walnut powder and a production method thereof; walnut kernel is peeled by high pressure water spraying, bubble water stream impact and ultrasonic wave vibration after being soaked by compound alkaline liquid, and then second-grade cold pressing is carried out to the peeled walnut kernel after the peeled walnut kernel is dried and crushed, the walnut kernel is crushed, filtered, batched and colloid-milled to be refined, and then a complex stabilizer is added in the walnut kernel to be sterilized, concentrated, homogenized and dried to obtain the walnut powder. The method has low damage degree, can effectively prevent protein denaturation and reduce alkaline liquid amount; the second-grade cold pressing technology is adopted, the denaturation degree of the protein of the walnut cake is reduced, and the walnut powder is prepared by high-pressure homogeneity and spraying drying; the visual color and luster, solubility and the content of the protein and other indexes of the product are superior to the similar products in the current market. The invention realizes the comprehensive utilization of the walnut resource, the technology is advanced, simple and practical and is easy to popularize, thereby having good economic and social benefits.
Owner:石家庄市丸京干果有限公司

Chicken essence and preparation method thereof

The invention relates to a preparation method of chicken essence. The method comprises the steps of weighing chicken breast and chicken skeleton, adding water, boiling at high temperature, and then, passing through a colloid mill, so as to obtain colloidal chicken juice; hydrolyzing the colloidal chicken juice, then, carrying out enzyme deactivation and filtrating, so as to obtain enzymolysis chicken juice; uniformly mixing the enzymolysis chicken juice, L-cysteine hydrochloride, ribose, L-proline, xylose, dextrose monohydrate, L-glycine, water and chicken oil, and then, adding the mixture into a reaction kettle for Maillard reaction, so as to obtain a chicken juice reactant; uniformly mixing the chicken juice reactant, salt, white granulated sugar, monosodium glutamate, modified starch, maltodextrin, cyclodextrin, water, I+G, chicken oil and chicken flavoring base, then, passing through a colloid mill, filtrating to obtain colloidal chicken cream, emulsifying the colloidal chicken cream, and then, carrying out spray drying on the emulsified colloidal chicken cream through a homogenizer, thereby obtaining the chicken essence. The invention further relates to a product of the preparation method of the chicken essence. Compared with the existing products, the chicken essence prepared by the method has the advantages that the chicken fragrance is unique, the flavor is harmonious, the taste of chicken is strong and full, and the fragrance and the flavor can be of long-term coexistence.
Owner:GUANGZHOU TIANHUI FOOD

Method for preparing fucoidan

InactiveCN101993501AComprehensive utilization value has no impactComprehensive utilization value impactFood additiveLiquid ratio
The invention provides a method for preparing fucoidan, relating to the field of production and application of food additives. The method comprises the following steps of: adding distilled water according to a material to liquid ratio of 1:40-4:80 g / mL with brown algae, such as kelps, undaria pinnatifida, and the like as raw materials; treating by a colloid mill and then carrying out microwave-assisted extraction or ultrasonic wave-assisted extraction, wherein, in the microwave-assisted extraction process, the microwave time lasts 20-40min, the microwave extraction temperature is 60-80 DEG C, and the microwave power is 400-500W; and in the ultrasonic wave-assisted extraction process, the ultrasonic power is 800-100W, the microwave time lasts 20-40min, and the extraction temperature is 60-90 DEG C; and centrifuging an extracting solution, adding a proper amount of 2% CaCl2 solution into a supernatant, stirring, keeping constant temperature for 20-30h at 35-40 DEG C, centrifuging, adding 50-100% ethanol into the supernatant until the ethanol concentration of the solution is 15-20%, stirring, filtering, concentrating, adding 90-100% ethanol into a concentrated solution until the ethanol concentration of the solution is 55-60%, centrifuging again and drying a precipitate in vacuum to obtain white or yellow-white fucoidan powder.
Owner:ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Method for preparing modified asphalt by adopting raw material with low asphaltene content

The invention relates to a method for preparing modified asphalt by adopting a raw material with low asphaltene content. The method provided by the invention comprises the following steps of: carrying out thermal cracking reaction with reduced pressure residual oil, deoiled asphalt or mixture with the asphaltene content to be less than 5% at the temperature of 350-450 DEG C, then distilling and cutting to obtain tower bottom residue high-asphaltene-content component with the atmospheric boiling point of being higher than 350 DEG C; mixing the high-asphaltene-content component with a compatilizer at the temperature of 140-190 DEG C, adding a polymer modifier, shearing for 5-120 minutes at the temperature of 160-200 DEG C by adopting a high-speed shearing machine or a colloid mill, so as to disperse polymer into asphalt physically; and warming to a reaction temperature of 160-230 DEG C, adding stabilizer composition, stirring and reacting for 30-360 minutes, and carrying out chemical reaction on the polymer and the asphalt, so that the modified asphalt is obtained. The polymer modified asphalt obtained by the method provided by the invention has the advantages of high temperature storage stability, excellent high-and-low temperature performances and high ageing resistance, a technological process is simple, and production efficiency is high.
Owner:PETROCHINA CO LTD +1

Method for preparing solid refuse composite modified asphalt

InactiveCN101200597AMeet road requirementsSufficient sourceBuilding insulationsMetallurgyWaste rubber
The present invention belongs to the technical field of asphalt modification. The present invention relates to solid wastes comprising waste rubber, waste plastic and waste pyrolysis carbon black, the composing of which is 2 percent to 22 percent of waste rubber powder, 1 percent to 8 percent of the waste plastic, 0.5 percent to 6 percent of the waste pyrolysis carbon black, 1 percent to 6 percent of surfactant, 0.02 percent to 3 percent of crosslinking agent and 75 percent to 90 percent of asphalt. A preparation technology is finished by two steps that a first step is modifying the rubber powder, under the temperature condition of 70 DEG C to 100 DEG C, the rubber powder and the surfactant are mixed and stirred for 5 to 20 minutes at the speed of 20 to 100r/min and are mixed uniformly for using; the second step is to prepare modified asphalt, the asphalt is heated up to 120 DEG C to 160 DEG C, the waste plastic is added while being stirred at the speed of 200 to 1000r/min and then is stirred fast for 5 to 10 minutes at the speed of 600 to 3000r/min, the temperature is kept about 170 DEG C, modified rubber powder is added while being stirred, the crosslinking agent and the waste pyrolysis carbon black are added to be stirred fast for 10 to 20 minutes, and a system is processed for high-speed cutting or colloid mill grinding to prepare the modified asphalt.
Owner:NANKAI UNIV

Carbon nano-tube fiber cement-based material and preparation thereof

The invention relates to a cement-based material of carbon nano tube fiber and a preparation method thereof, in particular to a toughened cement-based material and a preparation method thereof. The invention solves the problems of relatively low anti-bending and anti-breaking intensity and toughness of the existing fiber toughened cement-based material. The material is produced by a fiber dispersant, an organic solvent, carbon fibers, carbon nano tubes, deionized water, a superplasticizer, a polymer emulsion, mineral admixture and cement. The preparation method of the invention is as follows: the fiber dispersant is added into mixed slurry of the cement and stirred; the primarily mixed slurry is fed into a high shearing colloid mill for shearing at high speed for 5 to 30min; the evenly stirred slurry is poured into a test mould which is moved to a vacuum drying case for pressure reducing and bubble-removing and heated for evaporation of the solvent for 0.5 to 3 hours; after 24 hours, and the material is obtained after tearing the mould and maintained in water at room temperature. The fracture energy GF and the fracture toughness of the material obtained by using the method of the invention respectively are 106.3N question mark m and 0.998Mpa / m<-1 / 2>, which are respectively 112.6 percent and 33.1 percent higher than the fracture energy and the fracture toughness of the existing fiber toughened cement-based material.
Owner:HARBIN INST OF TECH

Method for improving stability of mineral oil defoaming agent

A method for improving the stability of a mineral oil defoaming agent, which belongs to the field of fine chemical preparations, is characterized in that the viscosity of the mineral oil defoaming agent system can be improved after strong shear action by adding hydrophilic inorganic particles into the system and uniformly dispersing the hydrophilic inorganic particles into the system, thereby improving the product stability. The defoaming agent comprises (1) mineral oil carrier 70% to 90%; (2) main defoaming substances 1% to 15%, containing hydrophobic white carbon black and ethylene bis stearamide (EBS); (3) defoaming aid 1% to 20%: RO(EO)x(PO)yH polyether; (4) nonionic surfactant 3% to 15%; and (5) hydrophilic inorganic particles 0.1% to 5%, containing hydrophilic white carbon black, aluminum oxide, zinc oxide and magnesium oxide. The operation comprises following steps: (A) adding the mineral oil into a flask, adding the main defoaming substance and the defoaming aid therein, stirring, heating to 80 to 150 DEG C, and keeping the temperature for 0.5 to 3 h; (B) lowering the temperature to 50 to 80 DEG C, adding an emulsifying agent, uniformly stirring, lowering the temperature of the mixture system below 40 DEG C and adding the hydrophilic inorganic particles; (C) passing through a colloid mill; and (D) vacuum degassing to obtain a mixture with good stability, i.e. the mineral oil defoaming agent.
Owner:JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD

Method for comprehensively extracting tea seed saponin, tea seed polypeptide and tea seed polysaccharide from tea seed cake

The invention discloses a method for comprehensively extracting tea seed saponin, tea seed polypeptide and tea seed polysaccharide by using tea seed cake as a raw material. The extracting method comprises the steps of mixing degreased tea seed cake with ethanol, treating with a colloid mill and a homogenizer, then performing water bath ethanol extraction, centrifuging, performing ultra-filtration, and concentrating to obtain the tea seed saponin; mixing the centrifuged sediment with water, extracting with ultrasonic and microwave, centrifuging, regulating the pH of the supernate, centrifuging for the second time, dissolving the sediment, and performing enzymolysis, enzyme deactivation, ultra-filtration and spraying to obtain the tea seed polypeptide; and spraying the supernate obtained by secondary centrifuging to obtain coarse tea seed polysaccharide, and then performing ultra-filtration and ethanol precipitation to obtain the high-purity tea seed polysaccharide. The method is simple, low in production and equipment cost, high in product extraction rate and high in purity, and greatly improves the additional value of the tea seed cake. A new thought and a new method are provided for efficient comprehensive utilization of the tea seed cake.
Owner:NANCHANG UNIV
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