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42results about How to "Low water insoluble content" patented technology
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Temporary plugging diversion agent for refracturing of oil-water well and preparation method thereof
The invention relates to a temporary plugging diversion agent for refracturing of an oil-water well and a preparation method thereof. The temporary plugging diversion agent comprises the following raw materials: adhesive bonding agent 35-65%, plasticizer 15-25%, thickening agent 10-20%, and dispersant 10-20% calculated by the total weight of the temporary plugging diversion agent. The invention also provides the preparation method of the temporary plugging diversion agent, which comprises the following steps: preparing partial thickening agent into a thickening agent water solution; dissolving the adhesive bonding agent into the thickening agent water solution; holding constant temperature in a 25-35 DEG C water bath for 2-5 hours, and after the adhesive bonding agent is swollen completely, increasing the temperature to 45-55 DEG, and continuing holding constant temperature for 0.5-2 hours; after the adhesive bonding agent is completely dissolved, adding dispersant and stirring to be homogenous, and adding the plasticizer and the rest thickening agent while stirring to obtain viscous paste; and cutting the viscous paste to granules of side length 3-6 mm, and drying to obtain the temporary plugging diversion agent. The temporary plugging diversion agent provided by the invention has the advantages of good oil solubility and water solubility, low residue content, good elasticity, and on the like.
Owner:PETROCHINA CO LTD
Method for continuously producing water-soluble monoammonium phosphate by using wet-process phosphoric acid
The invention discloses a method for continuously producing water-soluble monoammonium phosphate by using wet-process phosphoric acid. The method comprises the following steps: adding phosphoric ore pulp to wet-process dilute phosphoric acid; after natural sedimentation, carrying out neutralization reaction between clear desulfurated dilute phosphoric acid at the top and ammonia gas, wherein the neutralization degree of slurry is 0.95-1.05; carrying out natural sedimentation of the neutralized slurry in a settlement trough; filtering ammonium phosphate supernatant in a filter; concentrating and drying the obtained supernatant, so as to prepare the water-soluble monoammonium phosphate, wherein a filter cake and filter residue which are obtained after filtering can be used for preparing an agricultural compound fertilizer. According to the method, the problem of a traditional method that corresponding impurity removal depth can be reached by means of improving the neutralization degree of the slurry and carrying out neutralization reaction many times is avoided, neutralization reaction is carried out only once, and operation is facilitated. Meanwhile, the production efficiency is also improved, the obtained water-soluble monoammonium phosphate is good in quality, and the content of insoluble matter is low. In addition, the method is short in technological process and relatively simple in production control and can be put into continuous production easily.
Owner:云南云天化国际化工有限公司
Water-solubility instant potassium sulfate fertilizer
ActiveCN103896683AAvoid cloggingLow water insoluble contentPotassium fertilisersFertilizer mixturesSoil scienceWater soluble
The invention provides a water-solubility instant potassium sulfate fertilizer and belongs to the technical field of an agricultural fertilizer. Agricultural potassium sulfate is purified by adopting a recrystallization process of 'heat dissolution and cold crystallization', and insoluble matter is removed out of water, so as to obtain high-purity crystal potassium sulfate; 0.1-3% of component A, 0.5-5% of component B and 0-1% of component C are added; the component A is a dispersant and water softener; the component B is an acid providing agent; and the component C is a wetting agent. The instant potassium sulfate fertilizer is packaged in mechanical mixing and drying manners. By adopting the method provided by the invention, the content of the insoluble matter can be effectively reduced, the dissolution degree is quickly improved, and the water-solubility instant potassium sulfate fertilizer is simple in technological process and has strong practical value. The product disclosed by the invention can be widely applied to agricultural facilities integrated with foliage spraying, trickle irrigation, sprinkling irrigation and the like.
Owner:SDIC XINJIANG LUOBUPO POTASH CO LTD +1
Environment-friendly dust suppressant with self-luminous function
PendingCN110835519AGood dust suppression effectNo irritating smellOther chemical processesPlanting seedEngineering
The invention provides an environmentally-friendly dust suppressant with a self-luminous function. The dust suppressant comprises, by mass, 0.1-20% of a water-soluble polymer, 0-10% of polyol, 0.01-15% of water-soluble modified plant polysaccharides, 0.01-15% of a dispersing aid, 0.1-30% of a luminous component, 0.01-5% of a preservative, and the balance of water. The environmentally-friendly dustsuppressant with the self-luminous function has the advantages of excellent dust suppression effect, uniformity in color, no pungent smell, small content of water-insoluble substances, no blocky or flocculent precipitate, convenience in production, high luminance and long afterglow time, can be repeatedly excited, and can be used as a roadbed or a wind shield wall warning of a construction site to avoid scratching of vehicles during night operation and improve the night operation safety. The environmentally-friendly dust suppressant has very small corrosivity to steel and harm to plant seeds,and can meet the use requirements of night operation warning of construction sites such as coal mines and the like.
Owner:QINGDAO RUIHONGXIN ECO TECH CO LTD
Preparation method of low-molecular-weight plant gelatin powder
InactiveCN103305571ALow water insoluble contentSpecial solubilityFermentationSolubilityNeutral protease
The invention relates to a preparation method of low-molecular-weight plant gelatin powder. The method comprises the following steps of: hydrating, rubbing, rolling and tackifying a plant gelatin sheet; sequentially carrying out enzymolysis treatment by utilizing mannose enzyme liquid and neutral protease liquid; and drying prepared plant gelatin with the certain molecular weight and treating into gelatin powder with the 120-160-mesh size. The plant gelatin sheet prepared by using the method disclosed by the invention can be any one of a guanidine gelatin sheet, a sesbania gelatin sheet and a tonka-bean gelatin sheet. A prepared product has the advantages of low water insoluble matters, high thickening efficiency, rapidness in thickening, protruding salt solubility, temperature stability and corrosion resistance, capability of being repeatedly used, and the like.
Owner:郑建立
Oil-gas field fracturing fluid, oil-gas field well cementing agent and oil-gas field fracturing temporary plugging agent containing PVA (Polyvinyl alcohol) fiber
InactiveCN107286922AEasy to plug inIncrease formation pressureProductsReagentsFiberPolyvinyl alcohol
The invention discloses an oil-gas field fracturing fluid, a temporary plugging agent and a well cementing agent containing a PVA (Polyvinyl alcohol) fiber. The PVA fiber is prepared by spinning PVA being 1000 to 3500 in polymerization degree, and 80 to 99.9 mole percent in alcoholysis degree. The oil-gas field fracturing fluid has the advantages of higher temperature resistance and shearing resistance, small environmental damage, low cost, environmental friendliness, very good sand carrying function and facilitation of fracturing fluid flowback; the oil-gas field well cementing agent can enhance the strength and the toughness of a well cementing material, can play a role in preventing leakage, is degradable and has low environmental damage; the oil-gas field fracturing temporary plugging agent has a good filtration reduction effect, forms a shielding layer at a position to be plugged temporarily to realize successful steering of the fracturing fluid, and is degradable; components left underground do not cause environmental pollution.
Owner:CHINA PETROCHEMICAL CORP +1
High-temperature acidic plant adhesive fracturing fluid and preparation method thereof
The invention relates to a high-temperature acidic plant adhesive fracturing fluid and a preparation method thereof. The high-temperature acidic plant adhesive fracturing fluid comprises, by mass, 0.55% of a thickening agent, 1.5% of a conditioner, 0.8% of a cross-linking agent, 0.5% of a cleanup additive, 0.5% of a clay stabilizer, 0.1% of a sterilizing agent, 0.1% of a demulsifying agent and thebalance water. The fracturing fluid has the advantages that a fracturing fluid system can be used under an acidic condition, and the damage of alkaline substances to a stratum is avoided; meanwhile,the fracturing fluid can be applied to CO2 fracturing construction; the acid plant glue fracturing fluid system is suitable for the well temperature of 160 DEG C.
Owner:北京宝丰春石油技术有限公司
Temporary plugging diversion agent for refracturing of oil-water well and preparation method thereof
The invention relates to a temporary plugging diversion agent for refracturing of an oil-water well and a preparation method thereof. The temporary plugging diversion agent comprises the following raw materials: adhesive bonding agent 35-65%, plasticizer 15-25%, thickening agent 10-20%, and dispersant 10-20% calculated by the total weight of the temporary plugging diversion agent. The invention also provides the preparation method of the temporary plugging diversion agent, which comprises the following steps: preparing partial thickening agent into a thickening agent water solution; dissolving the adhesive bonding agent into the thickening agent water solution; holding constant temperature in a 25-35 DEG C water bath for 2-5 hours, and after the adhesive bonding agent is swollen completely, increasing the temperature to 45-55 DEG, and continuing holding constant temperature for 0.5-2 hours; after the adhesive bonding agent is completely dissolved, adding dispersant and stirring to be homogenous, and adding the plasticizer and the rest thickening agent while stirring to obtain viscous paste; and cutting the viscous paste to granules of side length 3-6 mm, and drying to obtain the temporary plugging diversion agent. The temporary plugging diversion agent provided by the invention has the advantages of good oil solubility and water solubility, low residue content, good elasticity, and on the like.
Owner:PETROCHINA CO LTD
Associated type fracturing fluid resistant to high temperature and preparation method of associated type fracturing fluid
InactiveCN107868659AImprove temperature resistance and shear resistanceImprove shear resistanceDrilling compositionType fractureFracturing fluid
The invention provides associated type fracturing fluid resistant to high temperature. The associated type fracturing fluid resistant to high temperature is prepared from 0.4wt%-0.65wt% of associatedpolymers, 0.05wt%-0.4wt% of a compound synergist for the fracturing fluid, 0.2wt%-2wt% of a clay stabilizer, 0.3wt%-0.5wt% of a high-temperature stabilizer, 0.01wt%-0.15wt% of a gel breaker and the balance of water. Compared with the prior art, under the joint action of the associated polymers, the compound synergist for the fracturing fluid, the clay stabilizer, the high-temperature stabilizer and the gel breaker, the fracturing fluid has the advantages that temperature resistance and anti-shear ability are enhanced, temperature resistant capacity reaches 180 DEG C, besides, residue content of the gel breaker of the fracturing fluid is low, the damage rate of core substrate permeability is low, and the fracturing fluid has the characteristics of low residue content and little damage.
Owner:SOUTHWEST PETROLEUM UNIV +2
Water-soluble compound microbial fertilizer and preparation method thereof
PendingCN112225595AMake up for the lack of water insolubilityAvoid harmAlkali orthophosphate fertiliserAmmonium orthophosphate fertilisersBiotechnologyOrganic manure
The invention belongs to the technical field of microbial fertilizers, and particularly relates to a water-soluble compound microbial fertilizer and a preparation method thereof. The water-soluble compound microbial fertilizer provided by the invention comprises yeast fermentation waste liquid dry powder, inorganic water-soluble fertilizer and functional bacteria powder in a mass ratio of (68-85):(15-30): (0.3-3.5). According to the water-soluble compound microbial fertilizer provided by the invention, the water-soluble yeast fermentation waste liquid dry powder is used as an organic carrier,so that the defect that the traditional compound microbial fertilizer is not water-soluble is overcome, the application mode of the compound microbial organic fertilizer is expanded, meanwhile, the damage of the traditional organic fertilizer to crops is avoided, and by compounding the water-soluble yeast fermentation waste liquid dry powder with the functional bacterium powder and the inorganicwater-soluble fertilizer according to a certain proportion, the soil fertility can be effectively improved. Experimental results of the embodiment show that the content of the water-insoluble substances in the water-soluble compound microbial fertilizer provided by the invention is 0.08%-0.25%, and the requirement that the content of the water-insoluble substances in a general water-soluble fertilizer standard is less than or equal to 5% is met.
Owner:FUJIAN SANJU BIOLOGICAL SCI & TECH
Production process for organic water-soluble fertilizer
InactiveCN108821886AHigh purityStable storageOrganic fertilisersPotassium fertilisersWater insolubleOrganic fluid
The invention discloses a production process for an organic water-soluble fertilizer. The production process comprises the following steps: S1, adding agricultural organic wastes into a crushing machine for crushing operation, and carrying out filtering and collecting a sieved substance for subsequent usage; S2, adding organic fertilizer raw materials into water, carrying out heating under stirring, and adding organic active substances into a mixed solution for complete biological activation; S3, carrying out filtering so as to remove suspended matters from the mixed solution, and adding KOH into the solution so as to adjust the acidity and alkalinity of an organic liquid; S4, adding medium elements and trace elements into the organic matter mixed solution with high activity in proportion,and carrying out a reaction; and S5, placing a reacted solution in an ultrasonic environment for action, then carrying out coating through a coating machine, fully heating the mixed solution, and carrying out complete drying so as to obtain the organic water-soluble fertilizer. The production process provided by the invention is convenient to operate; and the organic water-soluble fertilizer produced by using the production process provided by the invention is greatly improved in economic values due to low content of water-insoluble substances contained in raw materials.
Owner:甘肃天元化工有限公司
Modification method of guar polysaccharide gum
ActiveCN104017096ALow water insoluble contentAvoid high viscous propertiesPolymer scienceWater insoluble
The invention provides a modification method of guar polysaccharide gum. According to the modification method, a guar polysaccharide gum sheet is sequentially modified by proteinase and mannase to obviously lower the water-insoluble content in the guar polysaccharide gum. The enzyme-process modification is performed in the polysaccharide micro water imbibition process, and avoids the characteristic of high viscosity of the polysaccharide gum; and the modification process is simple and efficient, is easy to implement, and has favorable compatibility with the existing polysaccharide gum production technique.
Owner:BEIJING FORESTRY UNIVERSITY
Micro water solid phase modifying method of gleditsia sinensis polysaccharide gum
The invention relates to the field of fine chemical engineering of biomass and particularly provides a micro water solid phase modifying method of gleditsia sinensis polysaccharide gum. The method comprises the following steps: firstly, hydrating a gleditsia sinensis polysaccharide gum sheet in an alkaline aqueous solution containing hydrogen peroxide; and then, obtaining a gleditsia sinensis polysaccharide gum modified product by virtue of extruding, drying and powdering processes, wherein the additional value of the gleditsia sinensis polysaccharide gum modified product is greatly improved.
Owner:BEIJING FORESTRY UNIVERSITY
Modification method of fenugreek polysaccharide gum
The invention provides a modification method of fenugreek polysaccharide gum. Graded screening is utilized to remove impurities with high water-insoluble substance content in the fenugreek polysaccharide gum sheet; and a physical process is utilized to perform modification (wetting fenugreek polysaccharide gum with a 15% ethanol water solution) and wall-breaking tackifying treatment, thereby greatly enhancing the apparent viscosity of the fenugreek polysaccharide gun and greatly lowering the water-insoluble content in the fenugreek polysaccharide gum.
Owner:BEIJING FORESTRY UNIVERSITY
The method for preparing carboxymethyl hydroxypropyl guar gum powder by one-step method of guar gum sheet
The invention relates to a method for preparing carboxymethyl hydroxypropyl guar gum powder by a guar gum sheet one-step method. The method comprises the following steps of adding guar gum sheets into an organic solvent-water mixed solution, heating the solution to a temperature of 30-80 DEG C, adding a sodium hydroxide solution into the heated mixed solution, carrying out an alkalization reaction process for 2-60min, then adding an etherifying agent into the reaction product, carrying out a reaction process at a temperature of 30-80 DEG C for 30-180min, then carrying out cooling and filtration, washing the filter residue, carrying out crushing, and carrying out drying to obtain a finished product. The method utilizes cheap guar gum sheets as raw materials, realizes carboxymethyl and hydroxyalkyl etherification modification by the one-step method, and greatly shortens reaction time than a multi-step method. Through synchronization of carboxymethylation and hydroxyalkylation, processes are simple and convenient, reaction time is short, and the product has low water-insoluble substance content, good crosslinking performances, good fracture initiation and sand-carrying functions and good application prospects in the field of oil field pressing crack liquids. The method has a wide application prospect in the field of oil field auxiliary agents.
Owner:山东广浦生物科技有限公司
Remediation method for applying humic acid to soil remediation
PendingCN111167851AHigh extraction rateAvoid pollutionContaminated soil reclamationOrganic fertilisersBrown coalSoil science
The invention relates to the technical field of soil remediation, and discloses a remediation method for applying humic acid to soil remediation, which comprises the following steps: preparing humic acid:acidic factors in a humic acid structure with peat, lignite or weathered coal as main raw materials are subjected to a chemical reaction with an alkali, so that ahumate is produced, humic acid contained in lignite is extracted through a potassium hydroxide solution with a certain concentration to obtain potassium humate, and the subsequent preparation processes are divided into two processes,namely dry humic acid processing and wet humic acid processing. According to the remediation method for applying humic acid to soil remediation, advantages of reducing adhesion in the production process, improving the soil remediation effect and the like are achieved;the problemthat in the soil remediation agent preparation process in the prior art, the phenomenon of adhesion is likely to occur inthe smashing and mixing process is solved, the remediation effect still has a certain optimizing and improving space, and therefore the remediation method for applying humic acid to soil remediationis provided for solving the proposed problems.
Owner:张君
Production method of water-soluble ammonium polyphosphate liquid
InactiveCN107892287AShort production processLess investmentAlkali orthophosphate fertiliserAmmonium orthophosphate fertilisersPhosphoric acidWater soluble
The invention discloses a production method of a water-soluble ammonium polyphosphate liquid. The method comprises the following steps: taking industrial phosphoric acid, liquid ammonia and gas ammonia as raw materials, preparing a high-temperature molten material through a tubular neutralization polycondensation reaction and a polymerization-kettle further neutralization condensation polymerization, and then carrying out cooling in a water-soluble ammonium polyphosphate water agent preparation tank with a cooling jacket for preparing the ammonium polyphosphate liquid. A water-soluble ammoniumpolyphosphate solid does not need to be prepared firstly, and the water-soluble ammonium polyphosphate water agent can be directly produced on a device. The production process is short, the equipmentinvestment is small, the production operation is simple and convenient, the product quality is good, and the production cost is low.
Owner:SHIFANG CHANGFENG CHEM CO LTD
Special solid water-soluble fertilizer for coptis chinensis and preparation method thereof
InactiveCN110028345AHigh nutrient contentImprove solubilityAlkali orthophosphate fertiliserAmmonium orthophosphate fertilisersDipotassium hydrogen phosphatePotassium nitrate
The invention discloses a special solid water-soluble fertilizer for coptis chinensis and a preparation method thereof. The special solid water-soluble fertilizer for coptis chinensis comprises the following raw materials by weight percentage: 50-65% of water-soluble ammonium polyphosphate, 10-15% of potassium nitrate, 10-15% of ammonium dihydrogen phosphate, 10-15% of dipotassium hydrogen phosphate and 3-10% of urea; the total nutrient content of the fertilizer reaches 76% or more, and the aggregated phosphorus accounts for 65% or more of the total phosphorus. The long-term sustained releaseof water-soluble ammonium polyphosphate is combined with the quick-acting effect of ordinary water-soluble fertilizers such as potassium dihydrogen phosphate, potassium nitrate, ammonium dihydrogen phosphate and urea to provide sufficient nutrients for each growth stage of coptis chinensis; the absorption and utilization rate of fertilizer nutrients is high, the loss of fertilizer nutrients is less, environmental pollution caused by conventional water-soluble fertilizers is lowered, the manual work is saved, the yield is increased, fertilization costs are reduced, and the planting efficiency is improved.
Owner:SHIFANG CHANGFENG CHEM CO LTD
Production technology of high-efficiency and high-concentration polyaluminum chloride
The invention discloses a production technology of high-efficiency and high-concentration polyaluminum chloride. Under the condition that lots of process devices and other raw materials are not added, treated aluminum-containing waste residues are neutralized by adopting an aluminum ingot and aluminum tape surface pickling waste liquid to serve as raw materials, and then the high-efficiency and high-concentration liquid polyaluminum chloride is produced through a negative-pressure synergistic concentration technology to replace a conventional solid product. The technology is simple and easy to operate, low in production input and suitable for industrial production; the water purification ratio of the prepared high-efficiency and high-concentration liquid polyaluminum chloride to the conventional solid product is about 1:1; and meanwhile, the production cost of the polyaluminum chloride is greatly reduced by using the aluminum-containing waste residues, wastes are changed into treasures, and the production technology meets the environmental protection concepts of energy conservation and emission reduction and circulation economy.
Owner:蓝保(厦门)水处理科技有限公司
Method for preparing nonionic water-soluble cellulose ether
Provided is a method for preparing nonionic water-soluble cellulose ether having low insoluble content and providing a transparent solution. More specifically, provided is a method for preparing nonionic water-soluble cellulose ether comprising at least the steps of: drying a pulp sheet or pulp chips into which the pulp sheet has been converted, bringing the dried pulp sheet or pulp chips into contact with an alkali metal hydroxide solution to obtain alkali cellulose, draining the alkali cellulose, and reacting the drained alkali cellulose with an etherifying agent.
Owner:SHIN ETSU CHEM IND CO LTD
Preparation method of high-viscosity modified guar gum
The invention discloses a preparation method of a high-viscosity modified guar gum. The preparation method is characterized by comprising the following steps: adding sheeted guar gum, a liquid alkali, an etherifying agent, carbon dioxide and water into a high-pressure resistant reactor, carrying out alkalization reaction and etherification reaction at a temperature in sections to obtain an modified guar gum, washing and centrifuging the modified guar gum to obtain a purified product, super-grinding the purified product, drying a high speed, micro-grinding under the vortex of airflow, and separating to obtain the finished product which is the high-viscosity modified guar gum. The continuously mixed high-viscosity modified guar gum disclosed by the invention is a white or off-white powder, has the advantages of small particle size and high swelling rate, contains less than 3% of water insoluble matters and has the viscosity of 6,200-7,500mPa.s. In addition, 100% of the high-viscosity modified guar gum can pass a 200-mesh sieve, and 98% of the high-viscosity modified guar gum can pass a 300-mesh sieve.
Owner:山东德坤工贸有限公司
Acrylamide copolymer, preparation method and application thereof
ActiveCN104250354ALow water insoluble contentGood compatibilityDrilling compositionSolubilityPolymer science
The invention discloses an acrylamide copolymer, a preparation method and an application. The acrylamide copolymer contains a constitutional unit A, a structural unit B, a structural unit C and a structural unit D, wherein, the structural unit A is the structural unit shown in a formula (1), the structural unit B is the structural unit shown in a formula (2), structural unit C is the structural unit shown in a formula (3), and structural unit D is the structural unit shown in a formula (4), and the viscosity average molecular weight of the acrylamide copolymer is 5-15 million. The provided acrylamide copolymer has the advantages of high drag reduction efficiency, high salt tolerance, good high shear-resistance performance, good water solubility, good compatibleness with a clay stabilizing agent and low damage to stratum.
Owner:CHINA PETROLEUM & CHEM CORP +1
Sulfonyl-containing hydroxypropyl fenugreek gum and preparation method and application of fenugreek gum
InactiveCN106496342AFast dissolutionLow water insoluble contentDrilling compositionSalt resistanceAlcohol
The invention includes sulfonyl-containing hydroxypropyl fenugreek gum and a preparation method and application of the fenugreek gum. At present, chemical modification of the fenugreek gum is rarely performed, and the salt resistance and temperature resistance of the fenugreek gum can not meet industrial production demands. The preparation method includes the following steps: adding hydroxypropyl fenugreek gum in an alcohol aqueous solution; introducing nitrogen; dropwise adding a sodium hydroxide aqueous solution while stirring the solution; increasing the temperature and adding a sulfonating agent for reaction; adjusting the reaction solution by acids to be neutral; conducting filtering and vacuum drying to obtain light yellow powder, namely, the sulfonyl-containing hydroxypropyl fenugreek gum. By introducing sulfonyl to modify the hydroxypropyl fenugreek gum, the salt resistance and temperature resistance of jelly are improved, the content of water insoluble matters is low, the use efficiency of the sulfonyl-containing hydroxypropyl fenugreek gum is improved, and the cost is saved.
Owner:SHAANXI UNIV OF SCI & TECH
Method for producing polyaluminium chloride
ActiveCN102070170BReduce manufacturing costIn line with the environmental protection concept of energy saving and emission reductionAluminium chloridesWater/sewage treatment by flocculation/precipitationIngotPolyaluminium chloride
Owner:蓝保(厦门)水处理科技有限公司
Acrylamide copolymer, preparation method and application thereof
ActiveCN104250336ASelf-degradableRealization of self-degradationDrilling compositionSolubilityPolymer science
The invention discloses an acrylamide copolymer, a preparation method and an application. The acrylamide copolymer contains a constitutional unit A, a structural unit B, a structural unit C and a structural unit D, wherein, the structural unit A is the structural unit shown in a formula (1), the structural unit B is the structural unit shown in a formula (2), structural unit C is the structural unit shown in a formula (3), and structural unit D is the structural unit shown in a formula (4), and the viscosity average molecular weight of the acrylamide copolymer is 5-15 million. The provided acrylamide copolymer has the advantages of high drag reduction efficiency, high salt tolerance, good high shear-resistance performance, good water solubility, good compatibleness with a clay stabilizing agent and low damage to stratum.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for preparing nonionic water-soluble cellulose ether
Provided is a method for preparing nonionic water-soluble cellulose ether having low insoluble content and providing a transparent solution. More specifically, provided is a method for preparing nonionic water-soluble cellulose ether comprising at least the steps of: drying a pulp sheet or pulp chips into which the pulp sheet has been converted, bringing the dried pulp sheet or pulp chips into contact with an alkali metal hydroxide solution to obtain alkali cellulose, draining the alkali cellulose, and reacting the drained alkali cellulose with an etherifying agent.
Owner:SHIN ETSU CHEM IND CO LTD
Method for granulating urea by using melt marble cutting technology and obtained urea granules
ActiveCN112299886ASolve sticking problemsAvoid particle agglomeration problemsSolid/semi-solid fertilisersUrea compound fertilisersPhysical chemistryMineralogy
The invention discloses a method for granulating urea by using a melt marble cutting technology, which comprises the following steps: by using industrial urea powder and omniphobic urea melt powder asraw materials, coating the surface of urea melt with the omniphobic urea melt powder in a melting coating or premixing melting mode to form urea melt marbles; and then cutting the urea melt marble ona superomniphobic urea melt cutting table surface which is higher than the melting point of urea and lower than the decomposition temperature of urea to obtain independent urea melt particles, and condensing the independent urea melt particles after cooling to obtain urea particles. By using the granulation method disclosed by the invention, urea particles with different particle sizes can be conveniently prepared as required, the cost can be reduced, the pollution to the environment can be alleviated, the prepared urea particles have excellent moisture degradation resistance and slow releaseperformance, the compressive strength of a single urea particle can reach 6.36 N / mm, and the urea particles are high in compression resistance and not easy to break.
Owner:SICHUAN UNIV
A kind of micro-aqueous solid-phase modification method of saponins polysaccharide gum
Owner:BEIJING FORESTRY UNIVERSITY
Organic element water-soluble fertilizer and production process thereof
The invention discloses an organic element water-soluble fertilizer. The fertilizer comprises the following raw materials, in parts by weight: 30-40 parts of urea, 3-6 parts of potassium nitrate, 3-6parts of calcium EDTA, 3-5 parts of magnesium sulfate, 1-4 parts of copper sulfate, 1-4 parts of ferrous sulfate, 6-9 parts of zinc sulfate, 0.5-1.5 parts of manganese sulfate, 1.5-2 parts of boric acid, 0.6-1 part of ammonium molybdate, 1-3 parts of organic selenium, 35-45 parts of a co-solvent, 3-5 parts of polyoxin A, 1-3 parts of composite vitamin B soluble powder, 1-2 parts of vitamin C soluble powder, 4-5 parts of a plant regulating agent, 6-7 parts of a plant active agent and 800-900 parts of water. According to the preparation process of the water-soluble fertilizer provided by the invention, the raw materials are mixed and dissolved, a concentration of the water-soluble fertilizer is controlled by reduced-pressure distillation, so that the overall mass of the water-soluble fertilizer is reduced, packaging and transportation in later period are facilitated, and the fertilizer is not spread or lost; and the water-soluble fertilizer is convenient to operate, and the prepared organic water-soluble fertilizer has high purity.
Owner:LOMON LAND AGRI
A kind of modification method of guar polysaccharide gum
The invention provides a modification method of guar polysaccharide gum. According to the modification method, a guar polysaccharide gum sheet is sequentially modified by proteinase and mannase to obviously lower the water-insoluble content in the guar polysaccharide gum. The enzyme-process modification is performed in the polysaccharide micro water imbibition process, and avoids the characteristic of high viscosity of the polysaccharide gum; and the modification process is simple and efficient, is easy to implement, and has favorable compatibility with the existing polysaccharide gum production technique.
Owner:BEIJING FORESTRY UNIVERSITY
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