380 results about "Polydimethyl diallylammonium chloride" patented technology

The invention discloses a manufacture method of a molecular sieve honeycomb body for absorbing volatile organic compounds, which comprises the steps of: regulating 5-20 percent of ceramic fiber, 5-20 percent of adhesion agent, 5-15 percent of paper pulp and 60-80 percent of zeolite molecular sieve with water into a suspension with concentration of 2-10 percent; defibering and separating the suspension; then slowly stirring and adding poly dimethyl diallyl ammonium chloride, after flocculation occurs, adding anionic polyacrylamide and continuously stirring for 5-15 min and then making a paper plate; and making the made wet paper plate into a planar molecular sieve paper plate and a corrugated molecular sieve paper plate, and alternatively overlapping or coiling the planar molecular sieve paper plate and the corrugated molecular sieve paper plate into a honeycomb structure to obtain the molecular sieve honeycomb body. A zeolite molecular sieve provided by the invention is not easy to peel off, and is easy to process into various shapes; and the molecular sieve honeycomb body can absorb organic matters under different temperatures and humidities.

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 preparation method of an oil-water separation net membrane with super-hydrophilic lipophobicity. The method comprises the steps that a red copper net serves as a substrate; a micro-nano needle structure is constructed by a simple solution soaking method; surface modification is performed by a poly dimethyl diallyl ammonium chloride-sodium perfluorooctanoate / silica compound. The prepared oil-water separation net membrane with the super-hydrophilic lipophobicity is used for oil-water separation. The method has the advantages that the preparation method of the oil-water separation net membrane with the super-hydrophilic lipophobicity is simple, short in time consuming and stable in performance, and requires no large instrument; the prepared oil-water separation net membrane is easy to clean and good in recycling; water permeation instead of oil permeation can be achieved when the net membrane provided by the method is applied to the oil-water separation; the net membrane can effectively perform the oil-water separation on vegetable oil and gasoline, and has a wide application prospect in the oil-water separation.

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 discloses a polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant and a preparation method and an application thereof. The method comprises the following steps: heating polyaluminium chloride solution to 40-90 DEG C while stirring the solution, adding polyferric chloride, heating and stirring the solution to perform copolymerization between polyaluminium chloride and polyferric chloride for 0.5-2.0h, obtaining polymeric aluminum ferric chloride solution; adding polydimethyldiallylammonium chloride colloid at room temperature while stirring to obtain a mixed liquor of the two products; stirring at room temperature to ensure that the polydimethyldiallylammonium chloride colloid and polymeric aluminum ferric chloride are completely mutually soluble and obtaining the polymeric aluminum ferric chloride-polydimethyldiallylammonium chloride composite coagulant.

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 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.

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.

Method for preparing in-situ crystallization type catalytic cracking catalyst The method comprises: (1) using kaolin as a raw material to prepare in-situ crystallization products: adding deionized water, a binder, a poly dimethyl diallyl ammonium chloride auxiliary agent into kaolin, obtaining kaolin spray microballoons by spray drying prepared mixed seriflux, roasting, mixing roasted microballoons with a guiding agent, and then obtaining the in-situ crystallization products with 50-70% of NaY zeolite after hydrothermal crystallization, filtration, washing with water and drying, wherein the adding amount of poly dimethyl diallyl ammonium chloride auxiliary is 1-10% of the quantity of kaolin; (2) exchanging and roasting the in-situ crystallization products: fully mixing the in-situ crystallization products and 0.01-3N acid solution in a liquid-solid mass ratio of 4-15:1 under 20-100 DEG C, regulating a pH value in a range of 2.8-6.0, treating for 10-100min, then adding one or more of ammonium salts, rare earth or phosphor for exchanging, and roasting, to obtain the in-situ crystallization type catalytic cracking catalyst.

The invention discloses a preparation method for a gold-shell magnetic ellipsoid and relates to a preparation method for a multi-layer nuclear shell structure ellipsoid. The preparation method is used for solving the problem that a photonic crystal assembled by the existing magnetic ellipsoid with the nuclear shell structure is low in photo-thermal conversion efficiency and photoelectric conversion efficiency. The preparation method comprises the following steps: 1. preparing a spindly alpha-Fe2O3 particle; 2. firstly obtaining alpha-Fe2O3 particle dispersing solution, and then adding polyvinylpyrrolidone for modification; 3. carrying out silicon dioxide coating to obtain a silicon dioxide coated ellipsoidal particle; 4. adding a poly dimethyl diallyl ammonium chloride aqueous solution and NaCl to prepare a silicon dioxide coated ellipsoidal aqueous solution adsorbing polyelectrolyte; 5. preparing a gold solution; 6. adding the gold solution into the silicon dioxide coated ellipsoidalaqueous solution adsorbing polyelectrolyte to obtain alpha-Fe2O3 / SiO2 / Au ellipsoidal particles; and 7. carrying out hydrogen reduction to obtain the Fe3O4 / SiO2 / Au ellipsoid. The preparation method ismainly used for preparing the gold-shell magnetic ellipsoid.

The invention relates to a water purifying agent, in particular to a water purifying agent for purifying an aquaculture water environment. The water purifying agent comprises the following components in parts by mass: 12 to 15 parts of poly dimethyl diallyl ammonium chloride, 25 to 40 parts of a microbial flocculant, 5 to 8 parts of an aquaculture oxygen supply agent, 9 to 12 parts of a biological enzyme and 7 to 10 parts of cellulose. After the formula is adopted, the microbial flocculant has the characteristics of biodegradability, safety, high efficiency, no toxicity and no secondary pollution, and overcomes the defects of inorganic polymer and synthetic organic polymer flocculants, and finally non-pollution discharge is realized. The poly dimethyl diallyl ammonium chloride is used as the organic water purifying agent and has the characteristics of small use amount, strong flocculation capacity, high efficiency and the like. The oxygen supply agent can rapidly and effectively increase dissolved oxygen in water, improves water quality, adsorbs and degrades organisms in the water and also can effectively sterilize the water.

The invention discloses an ionic-type foam concrete foaming agent and a preparation method thereof, belonging to the technical field of building chemical materials. The ionic-type foam concrete foaming agent is prepared from the following components in parts by weight: 1.5-3 parts of polydimethyldiallylammonium chloride, 0.4-1.2 parts of zwitterionic surfactant, 5-10 parts of anionic surfactant, 0.2-1 part of thickening agent and 70-80 parts of water. The ionic-type foam concrete foaming agent prepared by the method has the advantages that the raw materials are easy and convenient to obtain, the cost is relatively low, the foam stability is high, and the quality guarantee period of the foaming agent is long.

The invention discloses a chemical agglomeration promoter for removing fire coal fine particulate matters. The chemical agglomeration promoter is prepared from poly-dimethyl-diallyl-ammonium chloride, sorbitan fatty acid ester and water, wherein the mass percent of poly-dimethyl-diallyl-ammonium chloride is 0.001%-0.01%; and the mass percentage of the sorbitan fatty acid ester is 0.001%-0.1%. The invention also discloses an application method of the chemical agglomeration promoter. The chemical agglomeration promoter is capable of effectively promoting fine particles in a gas flue to agglomerate and flocculate to form large particles, and carrying out integral removal on heavy metals in a flue gas; the efficiency of a dust remover for removing fine particulate matters is improved; and the environment problem is effectively relieved.

The invention relates to a compounded cationic flocculant and a preparation method thereof. The flocculant is a cationic flocculant which is prepared from compounded dimethyl diallyl ammonia chloride as a main component and hydrophobic anionic copolymer. The hydrophobic anionic copolymer is used as a viscosity regulating agent and is added into a polydimethyl diallyl ammonia chloride solution; due to adoption of the anion and the hydrophobic groups, the interaction of the flocculant with organic matters in sewage is improved, and the performance of the flocculant is improved. The hydrophobic anion can form an amphoteric polymer with hydrophobic groups together with dimethyl diallyl ammonia chloride, so that a product is wide in application range and can be used in both acid and alkali mediums. The compounded cationic flocculant provided by the invention is a liquid, has the advantages of low production cost, high dissolution speed, environmental friendliness, energy conservation, consumption reduction, convenience in use and the like, is remarkable in decoloring chemical fiber sewage, is large and dense in floc and is high in sedimentation velocity.

The invention relates to an oilfield sewage treatment coagulating agent, particularly a thick oil sewage treatment coagulating agent. The thick oil sewage treatment coagulating agent comprises the following components in percentage by weight: 15.0-25.0% of polyaluminum chloride, 5.0-10.0% of polyzinc sulfate silicate, 0.5-1.0% of ammonium polydimethyldiallylchloride and 5.0-10.0% of 3.0G polyamide-amine. The preparation method comprises the following steps: adding the polyaluminum chloride and polyzinc sulfate silicate into water in percentage by weight, completely dissolving, adding the ammonium polydimethyldiallylchloride and 3.0G polyamide-amine, stirring uniformly, and regulating the pH value to 3.0-5.0 to obtain the thick oil sewage treatment coagulating agent. The thick oil sewage treatment coagulating agent has the advantages of low consumption and low price, and is suitable for a multifunctional swirl reactor treatment technique. The thick oil sewage treatment coagulating agent has the functions of reverse demulsification and water purification, and has favorable purifying effect on the thick oil high-temperature sewage. The preparation method is simple and easy to implement.

The invention discloses a micro-fluidic chip used for cell sorting and gathering and an application of the micro-fluidic chip. The micro-fluidic chip comprises a chip body and a cover, which are fixed in overlaying arrangement. The cover is provided with a groove, and a sample feeding channel and a sample discharging channel, which communicate with the groove. An opening of the groove faces the chip body. The chip body is obtained through the following method comprising: (a) performing self-assembly of chitosan / prussian blue nanoparticles layer by layer on the surface of a conductive substrate; (b) performing self-assembly of polydiallyldimethylammonium chloride / polyacrylic acid layer by layer on the surface of the product obtained from the step (a); and (3) performing carboxyl-group activating treatment, avidin modification, and biotinylation antibody coupling of the product obtained from the step (b). An environmental-stimulus responding material is introduced to the micro-fluidic chip, so that properties of the micro-fluidic chip are changed in the function of outside stimulus, and the micro-fluidic chip can control and losslessly release captured cells.

The invention discloses a fabric formaldehyde-free fixing agent. The fixing agent comprises the following raw materials in parts by mass: 10-15 parts of poly dimethyl diallyl ammonium chloride, 15-18 parts of 2-hydroxypropyltrimethyl ammonium chloride chitosan, 25-34 parts of water, 20-25 parts of ethanol and 5-10 parts of fatty alcohol polyoxyethylene ether. The fixing agent disclosed by the invention has an excellent fixation effect, and can effectively improve colour fastness of fabric dyes and wet rubbing fastness in the processes of dyeing and printing. The fabric treated by the fabric formaldehyde-free fixing agent does not discolor.

The invention discloses a method for preparing a cationic poly(urethane-dimethyldiallylammonium chloride) color fixing agent, which comprises: synthesizing vinyl terminated cationic polyurethane prepolymer by using isocyanate, polyol, N-methyldiethanolamine and acrylate functional monomers as polymerization monomers; hydrating and dispersing the vinyl terminated cationic polyurethane prepolymer, and performing reversed emulsion polymerization of the vinyl terminated cationic polyurethane prepolymer and dimethyl diallyl ammonium chloride in a water soluble initiator to obtain the formaldehyde-free poly(urethane-dimethyldiallylammonium chloride) color fixing agent. The cationic poly(urethane-dimethyldiallylammonium chloride) color fixing agent contains no formaldehyde, retains the property of a polyurethane material, realizes the organic combination of the high performance of the two kinds of resins due to the high positive charge density of a poly(dimethyl diallyl ammonium chloride) chain segment and can effectively improve the color fastness of the dyed fabrics. When the color fixing agent is used, the color fastness of the fabrics dyed with direct dye and active dye is as follows: the dry friction fastness is grade 5, the wet friction fastness is grade 3 to 4, and the brushing fastness is 4 to 5.

The invention relates to an inorganic-organic multi-element composite flocculant, and a preparation method and application thereof. The inorganic-organic multi-element composite flocculant comprises poly dimethyl diallyl ammonium chloride, 4A zeolite, elm bark and grass powder, modified fly ash, sodium ferrate, red clay and additive. The flocculant has the advantages of high flocculation rate, low consumption, wide pH value application range and the like, and has wide industrial application prospects.

The invention relates to the technical field of fixing agent, and provides cationic organic silicon modified poly(diallyldimethylammonium chloride) fixing agent and a preparation method thereof. The preparation method comprises the following main steps: uniformly mixing dimethyl diallyl ammonium chloride, an organic silicon monomer, chelator and deionized water; and introducing nitrogen gas to expel oxygen, then adding initiator, and performing free radical polymerization to obtain the cationic organic silicon modified poly(diallyldimethylammonium chloride) fixing agent. The fixing agent prepared through the method provided by the invention is used for finishing after dyeing, the dry and wet rubbing fastness (especially wet rubbing fastness) of anionic dye for dyeing can be enhanced, the shade is not influenced, and the feeling of textile can be kept soft; and the fixing agent prepared through the preparation method is free of formaldehyde, non-toxic and environment-friendly, and is novel dyeing and printing auxiliary agent.

The invention discloses a dyeing process of ultrafine wool fiber wool tops. The dyeing process comprises the following steps: (1) adding the following components into a dye vat in parts by weight: 3.4 parts of polyacrylamide, 25 parts of water, 2.2 parts of polydiallyldimethylammonium chloride, 1.8 parts of sodium dithionite, 2.6 parts of camphor tree leaf extracting liquid, 13 parts of a natural plant pigment, 2.2 parts of N-methyl pyrrolidone and 1.9 parts of polyoxyethylene sorbitan fatty acid ester, and uniformly stirring; (2) immersing wool tops into the dye vat for 25 minutes; (3) drying the immersed wool tops at 60 DEG C; (4) immersing the dried wool tops into clean water and rinsing for 15 minutes; and (5) taking out the rinsed wool tops and naturally airing. According to the dyeing process of the ultrafine wool fiber wool tops, provided by the invention, the dyed wool tops have high color fastness and good dyeing uniformity and have no dyeing defects.

The invention discloses an organic-inorganic hybrid ionic bond efficient flocculant which is characterized in that an initiator, namely ammonium persulfate is added in a DMDAAC (dimethyl diallyl ammonium chloride) polymerization process to allow a molecular chain end of a composited polymer, namely PDMDAAC (poly dimethyl diallyl ammonium chloride) to be provided with sulfate radicals, the sulfate radicals are bonded with hydroxy aluminium ions with positive charge in an ionic bond form, and the PAC (poly aluminium chloride)-PDMDAAC organic-hybrid ionic bond efficient flocculant is obtained, and fully exerts excellent charge neutralizing capacity of PAC and an adsorption bridging action of PDMDAAC. In a water treatment process, the PAC-PDMDAAC hybrid flocculant is less in dosing quantity, and a formed flocculating body is quick in sedimentation, large and compact, so that the water treatment efficiency is improved significantly.

The invention relates to matt color ink jet printer paper paint and a preparation method thereof. The preparation method is characterized in that the method comprises the following steps: adding dispersant into deionized water to be dissolved at the room temperature; adding modified bentonitic clay to the dissolved deionized water and dispersing at the room temperature; adding silicon dioxide to the modified bentonitic clay dispersion liquid for dispersion, and obtaining mixed dispersion liquid; adding an adhesion agent to the mixed dispersion liquid while stirring; adding a silicone antifoaming agent, PDMDAAC and carboxymenthyl cellulose in sequence, and obtaining paint liquid after evenly blending and stirring. Because the modified bentonitic clay is utilized as the pigment to prepare the paint for the matt color ink jet printer paper, good water absorption performance, good color fixation performance, high color density, good color reductibility and no infiltration of the matt color ink jet printer paper can be ensured, and the purpose of reducing the cost of the matt color ink jet printer paper can be achieved.

The invention discloses an aluminum sulfate-poly-dimethyl-diallyl-ammonium chloride compound coagulant as well as a preparation and application method thereof, the coagulant is to position an aluminum sulfate AS dry powder or a solution in a mixing tank, and add water thereto to prepare an AS solution; the AS solution is agitated under normal temperature or heating condition and is added with PDMDAAC colloid or dry powder; and the mixed solution is agitated under normal temperature or heating condition until the PDMDAAC colloid or dry powder is fully dissolved, so as to get the stable aluminum sulfate-poly-dimethyl-diallyl-ammonium chloride compound coagulant. The application is to cast the aluminum sulfate-poly-dimethyl-diallyl-ammonium chloride compound coagulant diluted by water at any proportion or directly cast the coagulant in the process of treatment of various raw water and wastewater as well as the dehydration treatment of sludge and silt. The compound coagulant has a clear composition structure and can control the impurity content, and can replace the aluminum sulfate for playing a role in reducing the use cost of medicament and enhancing the coagulation, as well as improving a plurality of functions of the treated water; and the compound coagulant can be stored under normal temperature for a long time, the application performance will not be changed, and the performance is stable.

The present invention discloses an efficient and economical waste water treatment coagulating agent, which comprises ferrous sulfate, aluminum sulfate, ferric chloride, polysilicic acid, zeolite powder, polysilicic aluminum ferric chloride, poly dimethyl diallyl ammonium chloride, an inorganic acid, an organic matter decoloring agent, a heavy metal capturing agent montmorillonite, and a COD absorption agent. The waste water treatment coagulating agent has the following beneficial effects that: heavy metals and organic compounds in waste water are removed through multiple effects, a decoloring effect is further provided, and an efficacy range is wide.

The invention discloses a preparation method of an organic high-polymer flocculant, and a preparation method and application of an inorganic-organic high-polymer composite coagulant. The preparation method of the organic high-polymer flocculant comprises the following step: in the presence of an initiator and a chelator, carrying out solution polymerization on dimethyl diallyl ammonium chloride monomer to obtain a polydimethyl diallyl ammonium chloride colloidal solution which is the organic high-polymer flocculant. The preparation method of the composite coagulant comprises the following steps: 1) heating and mixing a polyferric sulfate solution with the colloidal solution to obtain a colloid mixed solution; and 2) keeping the temperature, and dispersing until the mixed solution forms a homogeneous system. The invention also discloses application of at least one of the prepared flocculant and inorganic-organic high-polymer composite coagulant in coagulative purification or sludge dewatering treatment of polluted water bodies. The technique is simple, and the prepared composite flocculant has favorable effect. The flocculant and coagulant can be used for micropolluted water source-water coagulative purification, special wastewater treatment, sludge dewatering and the like, and are simple and quick to operate.

The invention discloses a preparation method of a super-hydrophilic oleophobic net film. A silver micro-nanometer branch type structure is constructed through a simple solution dipping method with a brass net as a substrate; a poly-dimethyl diallyl ammonium chloride-perfluoro sodium caprylate / silicon dioxide compound is used for modifying the surface to prepare the super-hydrophilic oleophobic net film; the super-hydrophilic oleophobic net film is used for oil water separation. The preparation method of the super-hydrophilic oleophobic net film is simple, and is suitable for industrial production; the super-hydrophilic oleophobic net film is applied in the oil water separation to realize the effect of water penetrating the net film and oil not penetrating the net film, and has a better separation effect on vegetable oil and gasoline; the oil water separation net film has the advantages of easy cleaning, recycling property, good stability and excellent application foreground in the oil water separation.

The invention discloses a method for preparing adsorbent by using bottom mud of Dian Lake and application thereof, and belongs to the technical field of preparation of heavy metal adsorbents. The method comprises the following steps: soaking the bottom mud by distilled water, repeatedly washing and drying the bottom mud, adding a glutaraldehyde solution into the bottom mud to serve as an activator, adding the bottom mud into a polydimethyl diallylammonium chloride solution, putting in a water bath to carry out heating reflux, pouring the supernate and carrying out acidizing by hydrochloric acid, filtering and washing to neutral and drying to obtain initial samples, putting the samples in an electric furnace and carrying out high-temperature carbonization by taking vapor as protection gas, obtaining carbonized samples after cooling, repeatedly washing the samples to remove the impurities in the carbonized products until washing to neutral (pH>6.5), carrying out drying, grinding after cooling, and screening to obtain the samples according with adsorption. The method is simple in operation conditions, extremely high in adsorbent productivity; through combining the physical activation method and the chemical activation method, the activation effect is relatively good, the performance of the adsorbent is improved and the adsorption value of manganese is greater than 19mg / g.

The invention discloses a composite reverse-phase demulsifying agent for treating oil refinery sewage and a preparation method of the Composite reverse-phase demulsifying agent. The composite reverse-phase demulsifying agent is a water solution comprising 0.1-1 percent by mass of polyaluminum ferric silicate, 0.1-0.5 percent by mass of poly-dimethyl diallyl ammonium chloride and 0.1-1 percent by mass of cationic polyacrylamide, wherein in the polyaluminum ferric silicate, the content of Al2O3 is more than or equal to 28 percent, the content of SiO2 is 5-8 percent, and the content of Fe2O3 is 3-5 percent. The invention further discloses a preparation method of the reverse-phase demulsifying agent. The organic and inorganic composite reverse-phase demulsifying agent prepared by the preparation method is simple in preparation process, good in surface activity, high in demulsifying capacity, good in de-oiling effect, obvious in quality of the treated sewage and excellent in performance of shortening the time required for demulsification.

The invention relates to the technical field of a cross color-resistant product, and in particular relates to a cross color-resistant color capturing piece which comprises a carrier piece and a color capturing factor attached onto the carrier piece, wherein the mass fractions of the carrier piece and the color capturing factor are 97-99% and 1-3%; and the carrier piece is dust-free paper or non-woven fabrics, and the color capturing factor is poly-dimethyl diallyl ammonium chloride. After the cross color-resistant color capturing piece is adopted, the color capturing factor having ultrahigh color absorbing capability and color factor locking capability can be attached and added onto the carrier piece, and the color factor faded by washing the fabrics can be fixed, so that fabrics with the other different colors can not be polluted again, and the quality and the level of the product can be guaranteed. Meanwhile, the invention further discloses a preparation method of the cross color-resistant color capturing piece, and the preparation method is simple in technology and high in operability.