1137 results about "Dimethyldiazene" patented technology

The invention relates to a drilling fluid plugging agent while drilling, comprising 60-100 parts of plant fibers, 5-20 parts of asphalt, 5-15 parts of graphite and 5-20 parts of weak water absorbent gel by weight. The weak water absorbent gel is a polymer which has mean grain size of 200-20 meshes and water absorbent multiple of 10-100g.g-1 and is prepared by reacting 20-60 parts of monomer, 0.05-1.0 part of potassium peroxydisulfate, 0.05-1.0 part of sodium bisulfite, 0.005-0.5 part of methylene-bis-acrylamide and 2-10 parts of inorganic fillers by weight under constant temperature of 20-60 DEG C for 8-12h by way of aqueous solution polymerization, drying and pelleting, wherein the polymeric monomer is one or more of acrylamide, acrylic acid, dimethyl diallyl ammonium chloride and 2-acrylamide-2-methyl propanesulfonic acid. The plugging agent has little effect on the rheological property of the drilling fluid, can reduce the API filtration and the coefficient of friction resistance of the drilling fluid in an auxiliary manner and is suitable for controlling leakage of and plugging the windows with high density and narrow pressure.

Size press compositions and methods for producing sized paper products, including liner board, are disclosed. The size press compositions contain at least one non-reactive cationic surface sizing agent, at least one reactive sizing agent, at least one promoter resin, at least one binder, and water. The at least one non-reactive cationic surface sizing agent may be a polymer in the form of a dispersion, an emulsion or a latex with a positive zeta potential below about pH 6. The at least one reactive sizing agent may be a dispersion, an emulsion or a latex including an alkyl ketene dimer or an alkyl succinic anhydride. The at least one promoter resin may be a polyaminoamide-epichlorohydrin resin or poly (dimethyldiallylammonium chloride).

The invention relates to high temperature resistant amphoteric ion polymer fluid loss agent used for drilling fluid of a high temperature and high pressure drilling and a preparation method thereof. Four monomers, namely, acrylamide (AM), 2-acrylamide-2-methyl propane sulfonic acid (AMPS), dimethyl diallylammonium chloride (DMDAAC) and styrenesulfonate (SSS) are used as raw materials, wherein the mole ratio of AM:AMPS:DMDAAC:SSS is (9-11):(3-4):(0.5-1.5):(1.0-1.5); ammoniumpersulfate-sodium bisulfite as an initiator is added and solution is copolymerized through a polymerization method to compose the fluid loss agent. The fluid loss agent provided by the invention has the advantages of ideal high temperature resistant (more than 220 DEG C) reducing filtrate performance, shale inhibition performance and stable fluid rheology performance and simple preparation method, convenient operation and higher yield.

The invention relates to amphiprotic high-molecule chelated flocculating agent for various heavy metal waste water treatments and preparation method thereof. The amphiprotic high-molecule chelated flocculating agent of the invention is formed by following steps: configuring a basic skeleton by cationic dimethyl diallyl ammonium chloride and acrylamide copolymer; reacting with aldehydes and polyamine through Mannich to connect the polyamine to the high-molecule chain; then reacting with carbon bisulfide in alkaline condition. The invention mainly overcomes the disadvantages that the existing high-molecule chelating agent has excessive flocs negative charge caused by the suspension of part chelating radical because the space steric resistance of high-molecule chain and chelated radical are not matched so as to reduce the flocculating settling performance and the traditional heavy metal waste water processing method has complicated technique, high cost, low efficiency and cannot be suitable for large-scaled heavy metal waste water treatment. The invention is widely applied to the heavy metal waste water treatment of various types, in particular suitable for removing the heavy metal ions in industrial waste water and domestic sewage.

The invention relates to a grafted copolymerized cationic polysaccharide bioflocculant and a preparing method thereof. A product with the cationic degree (DC) of 3-63% is finally prepared through an aqueous solution polymerization technology with a present nonionic polysaccharide bioflocculant (Dx) as a raw material, one or more of dimethyl diallyl ammonium chloride (DMDAAC), methacryloxyethyltrimethyl ammonium chloride (DMC), acryloyloxyethyltrimethyl ammonium chloride (DAC), dimethylaminoethyl methacrylate (DMAEMA), dimethylaminoethyl acrylate (DMAEA) as a monomer, and one or two of ammonium persulfate / sodium bisulfate and dibenzoyl peroxide (BPO) (AIBA) as an initiator. The preparation method is simple, and is easy to control, and the product obtained in the invention has good flocculation effect and high treatment efficiency, and can be widely used in the field of treatment various sewages, the sludge dewatering field and the like.

The invention relates to a high-temperature-resistant copolymer oil well cement retarder and a preparation method thereof. The preparation method comprises: respectively weighing four polymerization monomers such as 2-acrylamide-2-methylpropanesulfonic acid, diallyldimethylammonium chloride, maleic anhydride or itaconic acid or fumaric acid, and acrylic acid or methacrylic acid according to the mass ratio of 45-80:5-17:7-18:8-20, dissolving the first three monomers in water, then adding sodium polyphosphate and diphenylcarbazide, then successively adding a chain transfer reagent and an initiator, and finally dropwise adding the forth monomer, performing heating reaction and adjusting the pH value, so as to obtain the copolymer retarder. The invention also provides the high-temperature-resistant copolymer oil well cement retarder prepared by the above preparation method. The retarder is resistant to a high temperature up to 230 DEG C and is weak in dispersibility at a high temperature, the cement paste strength develops fast at a low temperature, the addition amount of the retarder has good linear relation with the cement paste hardening time, and the cement paste comprehensive performance is good.

The invention relates to an AM (Acrylamide) / DMDAAC (Dimethyl Diallyl Ammonium Chloride) / cyclodextrin polymer filtrate reducer used in petroleum and gas drilling fluid and a preparation method thereof. The invention can solve the technical problems that a well wall is not stable as water loss increases at the pit bottom under the condition of high temperature, and the like. The AM / DMDAAC / cyclodextrin polymer filtrate reducer is characterized by comprising three monomers of AM, DMDAAC and cyclodextrin; the preparation method comprises the following steps of: firstly adding the AM and the DMDAAC into an allyl cyclodextrin water solution according to the mol ratio among the allyl cyclodextrin water solution, the AM and the DMDAAC of 69.2-84.2:30-15:0.8 in sequence; then adding a chelating agent, an oxidant and a reducing agent in sequence; finally evenly mixing, then injecting nitrogen for 20-40min and deoxidizing, and reacting at 30-50 DEG C for 6-8h to obtain the AM / DMDAAC / cyclodextrin polymer filtrate reducer. The preparation method of the polymer is simple, convenient and available and mild in reaction conditions; and the polymer has good filtrate reduction effect in the drilling fluid, is resistant to temperature up to more than 250 DEG C and used in the petroleum and gas drilling fluid.

The invention discloses a salt-resistant and calcium-resistant filtrate reducer applied to a drilling fluid and a preparation method of the filtrate reducer. The filtrate reducer is prepared from raw materials and water, wherein the raw materials comprise 2-acrylamide-2-methyl propane sulfonic acid, acrylic acid, acrylamide and dimethyl diallyl ammonium chloride; the ratio of m(2-acrylamide-2-methyl propane sulfonic acid) to m(acrylic acid) to m(acrylamide) to m(dimethyl diallyl ammonium chloride) to m(initiator) to m(molecular weight control agent) is (40-60) to (6-10) to (30-40) to (5-9) to (1-2) to (0.1-0.5). The molecular weight of the salt-resistant and calcium-resistant filtrate reducer applied to the drilling fluid and prepared by the preparation method is greatly improved; the coating property, the inhibition property, the heat stability and the salt-resistant and calcium-resistant pollution capacity of the filtrate reducer are greatly improved; by virtue of the salt-resistant and calcium-resistant filtrate reducer applied to the drilling fluid, the rheological property of the drilling fluid can be greatly improved; the salt-resistant and calcium-resistant filtrate reducer applied to the drilling fluid also has a high temperature-resistant effect at 150-180 DEG C.

The invention relates to a cationic polymer coating agent for water-base drilling fluid, which has the following structural formula, wherein A is a first monomer which is selected from one of N,N-dimethylacrylamide, acrylamide or N,N-diethylacrylamide, B is a second monomer which is selected from one of methacryloyloxyethyl trimethyl ammonium chloride, dimethyldiallylammonium chloride or acryloyloxyethyl trimethyl ammonium chloride, and C is a third monomer which is selected from 2-acrylamido-2-methylpropanesulfonic acid, vinyl sulfonic acid or methacrylic acid, wherein x is 40-120, y is 1-20, and z is 1-10. The invention also relates to a preparation method of the cationic polymer coating agent. When the cationic polymer coating agent of the invention is used for a water-base drilling fluid system, the cationic polymer coating agent has good rock debris coating effect and can improve the performance of the water-base drilling fluid system.

The invention relates to an oil field fluid loss additive for drilling liquid and its producing method and the application of the treating agent in the process of producing drilling liquid system. The treating agent utilizes the cation monomer dimethyl diallyl ammonium chloride can make the sodium lignin sulfonate and the sulfonated-methyl brown coal graft induced by FeCl3 so as to produce a new fluid loss agent with the resistance to salt and collapse at high temperature. The composed product integrates the brown coal and lignin. The cation introduction improves the resistance to collapse. The weak crosslinking function of the Fe3+ makes the heat resistance improved further based on the brown coal. Therefore, the product can be widely applied in different complicated conditions such as high temperature deep well, gypsum / slat bed, stratum with a bad water sensitivity, fragility stratum and etc. and has a good prospect.

The invention discloses a PAC-PDMDAAC compound coagulant, a corresponding preparation method and an application method. The PAC-PDMDAAC compound coagulant is prepared as the following steps: the PAC dry powder or solution is arranged in a mixing reactor, and water is added to obtain a PAC solution which is stirred under normal temperature and a PDMDAAC colloid is added into the solution; the mixed solution is stirred under normal temperature till the PDMDAAC colloid is completely dissolved to obtain a stable PAC-PDMDAAC. The application of the PAC-PDMDAAC compound coagulant is to adopt the PAC-PDMDAAC compound coagulant for the coagulation treatment to raw water and waste water and sewage and the dehydration treatment to sludge or silt directly or after dilution with water by any proportion. The component structure and content scope of the invention are distinct to guarantee the capability and stability of the obtained PAC-PDMDAAC compound coagulant, and the materials on industrial manufacturing are available. The various functions of the PAC-PDMDAAC compound coagulant can be adjusted during water treatment with high adaptability so as to reduce cost, reinforce coagulation effect and dramatically enhance the quality of obtained water.

The invention discloses a PFS-PDMDAAC compound coagulant, a corresponding preparation method and an application method. The PFS-PDMDAAC compound coagulant is prepared as the following steps: the PFS dry powder or solution is arranged in a mixing reactor, and water is added to obtain a ferric-salt PFS solution which is stirred under normal temperature and a PDMDAAC colloid is added into the solution; the mixed solution is stirred under normal temperature till the PDMDAAC colloid is completely dissolved to obtain a stable PFS-PDMDAAC. The application of the PFS-PDMDAAC compound coagulant is to adopt the PFS-PDMDAAC compound coagulant for the coagulation treatment to raw water and waste water and sewage and the dehydration treatment to sludge or silt directly or after dilution with water by any proportion. The component structure and content scope of the invention are distinct to guarantee the capability and stability of the obtained PFS-PDMDAAC compound coagulant, and the materials on industrial manufacturing are available. The various functions of the PFS-PDMDAAC compound coagulant can be adjusted during water treatment with high adaptability so as to reduce cost, reinforce coagulation effect and dramatically enhance the quality of obtained water.

The invention discloses a composite flocculating agent for processing radioactive elements iron, cobalt, manganese and silver in nuclear waste water and a processing method, which belongs to the technical field of the nuclear waste water treatment. The composite flocculating agent consists of a chemical precipitator and an organic polymer flocculating agent, wherein the chemical precipitator is one or combination of more than one of potassium permanganate, sodium sulfide, sodium carbonate and sodium hydroxide; the organic polymer flocculating agent is polyacrylamide, sodium polyacrylate and / or dimethyl diallyl ammonium chloride; and the processing method comprises the following steps of configuring the composite flocculating agent, charging the composite flocculating agent, regulating a pH value of the solution, mixing, flocculating and filtering. Due to the adoption of the composite flocculating agent and the processing method, multiple radioactive element ions of ultralow trace concentration in the nuclear waste water can be efficiently removed, and advantages such as rapidness and high efficiency in reaction process, charging in one step and little dangerous chemical sludge can be realized.

The invention relates to a cationic high-molecular low-temperature self-crosslinking formaldehyde-free color fixing agent and a preparation method. The color fixing agent is prepared from the following raw materials: dimethyl diallyl ammonium chloride containing 350 to 420kg of cationic monomer, water-soluble monomer comprising 0 to 20kg of acrylamide and 0 to 20kg of allyl amine, 10 to 20kg of low-temperature self-crosslinking reactive monomer, 10 to 20kg of low-temperature self-crosslinking accelerant, 1.0 to 2.0kg of evocating agent (ammonium persulfate) and 380 to 450kg of deionized water. The cationic high-molecular low-temperature self-crosslinking formaldehyde-free color fixing agent has the advantages that the color fixing agent can achieve ideal color-fixing effect and increase dye utilization rate, dyeing fastness and product quality. The preparation method has simple production process flow and low cost, and adopts a closed production process and special production equipment, thereby converting all input raw materials into products; and 'three wastes' (waste gas, waste water and waste residue) do not generated during the entire production course and the method is suitable for industrialized production.

The present invention provides pre-treatment process for sewage from thick oil refining. The pre-treatment process has the technological path including water quality and amount regulation, demulsifying to eliminate oil, cyclonic oil-water separation and floating purification, and adopts the copolymer of acrylamide and dimethyl diallyl quaternary ammonium salt as the demulsifier. The pre-treated sewage can reach the influent standard of refinery sewage treating yard. The present invention can recover oil while purifying oil containing sewage.

The invention discloses a method for preparing a copolymer of dimethyl diallyl ammonium chloride and acrylamide through initiation of a composite initiator. In the method, powder products of the copolymer of dimethyl diallyl ammonium chloride and acrylamide are prepared by taking high-purity industrial products, i.e., dimethyl diallyl ammonium chloride monomers and acrylamide monomers as raw materials, adding a metallic ion chelating agent and the composite initiator, initiating polymerization to produce colloidal products through heating in three steps, and then drying and crushing. In the invention, the content of various main impurities in the high-purity industrial products, i.e., cationic monomers and nonionic monomer materials, is known, and the upper limit of the content is defined, the process for preparing the products through copolymerizing the monomers has good stability, and the products have high relative molecular mass; the obtained PDA (Poly(DMDAAC-co-AM) products have high seriation degree of cationic degree, and the PDA products have high relative molecular mass under each cationic degree and a broad application range and can be more widely applied to a plurality of fields such as oil exploitation, papermaking, mining, textile printing and dyeing, daily-use chemical industry, water treatment and the like.

The present invention discloses preparation process of polyammonium dimethyldiallyl chloride with relatively high molecular weight. By using ammonium dimethyldiallyl chloride with high purity as material, and through adding initiator and complexing agent at certain temperature and stepped temperature raising for slow releasing of the initiator and stepped initiation of the polymerization, colloidal or powdered polyammonium dimethyldiallyl chloride is prepared. The process has high technological stability, low production cost and easy operation, and the product has relatively high molecular weight and various uses.

The invention provides a polydimethyldiallylammonium chloride modified color fixing agent and a preparation method thereof. The preparation method comprises the following steps: (1) adding a chelating agent and deionized water into a reaction kettle, starting agitating, heating for increasing the temperature; (2) when the temperature is increased to 60-80 DEG C, simultaneously dropwise adding dimethyldiallylammonium chloride, unsaturated ester, epoxy compound and initiator solution with the concentration of 1-10% into first to fourth elevated tanks in sequence, wherein the dripping time is controlled in the range of 0.5 to 2 hours, and the dripping temperature is controlled at 65-85 DEG C; and (3) after the dripping is finished, preserving the temperature for continuously reacting for 1 to 5 hours, adding deionized water according to the requirements of products so as to dilute, and evenly agitating to obtain the color fixing agent.

The invention relates to a preparation method of a polyaluminum ferric chloride-poly dimethyl diallyl ammonium chloride (PAFC-PDMDAAC) inorganic / organic composite flocculant. The inorganic / organic composite flocculant is prepared by taking AlCl3.6H2O, FeCl3.6H2O, and PDMDAAC as raw materials and adopting a method of adding PDMDAAC into a PAFC system. The flocculant integrates the advantages of high molecular weight of PDMDAAC, high charge neutrality and adsorption bridging ability, wide application range, good flocculation effect and small generated sludge quantity, and high PAFC reaction velocity, large formed flocculating constituent, high settling velocity, wide applied pH (potential of hydrogen) range, good coagulation effect and the like. The PAFC-PDMDAAC inorganic / organic composite flocculant can be widely applied to the fields of water supply, waste water treatment, papermaking, oil extraction, textile printing and dyeing, mining, daily-use chemical industry and the like, and has a good water treatment effect.

The invention discloses an efficient defluorination compound chemical and a method for treating fluoride waste water by using the same. The efficient defluorination compound chemical comprises, by weight, 50%-64% of polymeric aluminum, 3%-8% of magnesium chloride, 8%-13% of calcium chloride, 10%-13% of polymeric aluminum ferric chloride and 0.5%-2% of dimethyl diallyl ammonium chloride. By compounding the materials to prepare a liquid chemical and adding the liquid chemical into the fluoride waste water proportionally, complexation, agglomeration and absorption of fluorine ions are completed by mechanical stirring, the purpose of efficient defluorination is realized, and the efficient defluorination compound chemical has the advantages of simplicity in chemical application, high defluorination efficiency, low treating cost, wide application range and the like.

The invention discloses a water solution polymerization production method of dimethyl diallyl ammonium chloride and acrylamide copolymer, which uses cation industrial monomer DMDAAC and industrial non-ionic monomer AM prepared by industrial one-step method as raw materials, uses initiator via water solution polymerization to prepare dimethyl diallyl ammonium chloride and acrylamide copolymer, with high relative molecular weight and cation degree serialization. The invention uses cheap materials, has wide adjustable proportion between oxidant and reducer in initiator, and the application for initializing polymerization temperature of different cation degree PDA products. The invention has simple and mild reaction condition, while the PDA product cation degree is 5-99%, relative characteristic viscosity is 17.0-2.9dL / g, and residual monomer content is lower than 1%. The product has high cation degree serialization, high relative molecular weight of PDA product in each cation degree, strong adaptability, simple method, easy industrialization, and wide application in oil development, paper making, mining, weaving, dying, water treatment, and daily chemical or the like.

This invention relates to a composite clarification agent used in sugar production. The composite clarification agent is composed of: polymerized AlCl3, organic polymeric materials (including chitosan, chitosan quaternary ammonium salt and dimethyl diallyl ammonium chloride), and ultra-fine powder (including perlitic powder, diatomite and clay) at a ratio of (45-90) :( 1-10) :( 5-50). The composite clarification agent has high electrical neutralization and bridge linkage performances, and has such advantages as low cost, rapid solid-liquid separation and no toxicity. The composite clarification agent is suitable for clarifying mixed juice, filtrate and syrupy in sugar production. The method has such advantages as abundant raw materials, simple process and easy operation.

The invention provides a composite anti-mud agent based on a polycarboxylate-type pumping agent, an anti-mud pumping agent and a preparation method of the anti-mud pumping agent. The anti-mud pumping agent comprises a water reducing component which is namely a liquid polycarboxylate superplasticizer with solid content of 40%, a retarder component which is namely a conventional retarder, an entraining component which is namely an anionic surfactant synthesizing entraining agent and a composite anti-mud agent which is namely a mixture of calcium nitrate, polyvinyl alcohol, beta dextrin and diallyl dimethyl ammonium chloride. The preparation method of the anti-mud pumping agent comprises the following steps: firstly adding raw materials of the composite anti-mud agent into water, and preparing a composite anti-mud agent solution; adding the composite anti-mud agent solution into a mixture of the polycarboxylate superplasticizer, the entraining agent, the retarder and water, and uniformly stirring. The anti-mud pumping agent has the advantages that influence of content of mud in sand and stones on flowability of concrete can be obviously reduced without increasing the cost, the time loss in collapsed slump is reduced, and other properties such as strength of the concrete are not influenced.

The invention relates to a fracturing fluid thickening agent and preparation and application thereof. The thickening agent is mainly prepared from the following components in percentage by weight: 15-20% of acrylamide monomer, 6-10% of acrylic monomer, 3-6% of sodium carbonate, 3-8% of 2-acrylamide-2-methylpropanesulsonic acid, 1-4% of dimethyldiallylammonium chloride (60% aqueous solution), 0.03-0.08% of potassium persulfate and the balance of water. The preparation comprises the following steps of: adding the acrylic monomer and water into a reaction kettle; starting stirring and slowly adding sodium carbonate, wherein the adding speed is proper when the bubbles generated by the reaction do not overflow out of the reaction kettle; stirring till sufficient dissolution; adding 2-acrylamide-2-methylpropanesulsonic acid, and stirring till sufficient and uniform mixing; adding the acrylamide monomer and dimethyldiallylammonium chloride, and stirring till sufficient dissolution; heating the reaction liquid to 40 DEG C, introducing nitrogen, and performing thermal insulation stirring for 20 minutes; adding potassium persulfate; continuously introducing nitrogen, and stirring for 30 minutes; stopping the stirring, and reacting for 4 hours to obtain gel; and grinding the reaction product, drying and granulating to obtain the thickening agent.

The invention discloses mesoporous ZSM-5 zeolite, a mesoporous ZSM-5 zeolite-loaded metal sulfide catalyst and an application. The synthesizing method of the mesoporous ZSM-5 zeolite comprises the following steps: (1) after uniformly mixing diallylamine and concentrated hydrochloric acid, adding dimethyl diallyl ammonium chloride, uniformly stirring and reacting for 1-6 hours at 60-120 DEG C, and cooling to obtain a template agent DMMC (Dimethylol Methyl Carbamate); (2) preparing acidified aluminum sulfate liquor by aluminum sulfate, concentrated sulfuric acid and water; (3) adding water into water glass, uniformly stirring, adding NaOH, adding the template agent DMMC after cooling to room temperature, continuously stirring for 2-5 hours, then adding the acidified aluminum sulfate liquor under stirring, and stirring for 2-8 hours to obtain a gel in a final state; (4) crystallizing the gel in the final state obtained in the step (3), filtering, drying and calcining to obtain the mesoporous ZSM-5 zeolite. The mesoporous ZSM-5 zeolite-loaded metal sulfide catalyst prepared by taking the mesoporous ZSM-5 zeolite as a carrier is applied to hydrodesulfurization of 4, 6-dimethyl dibenzothiophene and hydrocracking reaction of n-decane, thereby greatly improving the raw material conversion ratio.

The invention belongs to the field of cationic polymer capsulation agents, and relates to an instant-dissolved low-molecular-weight polyacrylamide capsulation agent and a preparing method thereof. The capsulation agent is prepared from three monomers in a copolymerization mode, wherein the first monomer is one of acrylamide and sodium acrylate, the second monomer is one of cationic monomers including dimethyl diallyl ammonium chloride, diethyl diallyl ammonium chloride, acryloxyethyl ethyl dimethyl benzyl ammonium chloride, methacryloyl oxyethyl dimethyl-benzyl ammonium chloride and methacryloyloxyethyl trimethyl ammonium chloride, and the third monomer is one of hydroxyethyl methylacrylate and hydroxypropyl methacrylate. The molecular structures of the monomers contain hydroxyl, the hydroxyl can interact with drilling cuttings, and the capsulation inhibiting performance is improved. According to the capsulation agent, the inverse emulsion polymerization technology is adopted, the aftertreatment technology is simple, the granular product can be conveniently stored for a long time and transported, the dissolving time is short in use, convenience is brought to site utilization, the capsulation inhibiting effect is good, and the performance of a drilling fluid system can be improved.

A bond is created during gypsum board cure between a gypsum matrix and a tacky coating applied onto a glass fiber. The tacky coating is comprised of a polymer composed of methacrylic acid and dimethyldiallyammonium chloride. The polymer is dissolved in an acidic aqueous solution and is roller coated onto the glass fibers. The chopped glass fibers may also be placed in such an acidic solution, which is made alkaline by the addition of alkali, thereby precipitating the polymer out of solution as a tacky composition that produces a tacky coating on the glass fibers. The glass fibers with the tacky bond coating are incorporated in an alkaline gypsum slurry to form a gypsum board having a first and second facer sheet. The tacky coating on the glass fibers bonded to the gypsum matrix result in compliant load transfer between the gypsum matrix and the glass fibers, yielding improved flexure strength and nail pullout resistance.

The invention discloses a preparation method of hydrophobic modified cation polyacrylamide flocculating agent including following steps: acrylamide, dimethyl diallyl ammonium chloride, butyl acrylate and surface-active agent are mixed after being weighed. Polymerized monomer water solution is obtained after the above mixture is stirred to be uniform with the addition of deionized water. All kinds of additives are then added in the polymerized monomer water solution; a compound initiator and then a photoinitiator are added for polymerization; after the polymerization reaction, colloidal particles are extracted for granulation, drying, crushing and sieving. The hydrophobic modified cation polyacrylamide is then obtained in the end. The flocculating agent prepared in the invention can improve the adsorption capacity of polymers to suspended particles especially organics in water through the introduction of hydrophobic groups into flocculating agent macromolecules. At the same time, the flocculating agent has a character of the hydrophobic association of high polymers which is in favor of the interaction between macromolecules, the reduction of the hydrophilic nature of flocs, the acceleration of the settling velocity of flocs and the improvement of the floccules intensity and the water separation capability of filter cakes.

The invention discloses an inorganic montmorillonoid composite cross-linked polymer microsphere, which comprises the following components in parts by weight: 0.1 to 10 parts of compound monomer, 10 to 50 parts of crylic acid monomer, 5 to 65 parts of acrylamide, 0.01 to 1 part of crosslink agent and 0.01 to 0.4 part of initiator; the initiator is a mixture of water-soluble initiator and oily initiator, and the compound monomer is the compound monomer of inorganic montmorillonoind and dimethyl diallyl ammonium chloride. The invention also provides a preparation method of the cross-linked polymer microsphere and an application of the prepared cross-linked polymer microsphere which is used as a profile control agent for sealing a high-permeability belt and a large pore in an oil reservoir in the oil field exploitation.