81 results about "Acid dye" patented technology

The invention relates to a cationic hydrophilic softener for chinlon dyeing in one bath as well as a preparation method and application of the cationic hydrophilic softener. The method comprises the following steps: S1, carrying out hydrosilylation reaction on end hydrogen-containing silicone oil and allyl epoxy polyether under the action of a platinum catalyst; s2, polyol containing hydroxyl and polyisocyanate are subjected to a reaction under the action of a first catalyst, and a-NCO-terminated polyurethane prepolymer is generated; a chain extender containing a tertiary amine group is added into the polyurethane prepolymer for a reaction; adding the epoxy-terminated polyether silicone oil obtained in the step S1 for reaction, and then adding acid for neutralization to obtain cationic polyurethane modified silicone oil; and S3, emulsifying. The softening agent prepared by the invention has excellent stability in a high-temperature acid dye bath, and does not demulsify and stick to a vat; the compatibility with acid dyes is good, and color spots and color spots can be effectively avoided; and after use, the chinlon fabric can be endowed with lasting, smooth and soft hand feeling and good hydrophilicity, and meanwhile, the original whiteness of the fabric is kept.

The invention relates to the field of leveling agents, in particular to a hand feeling type acidic leveling agent and a preparation method thereof. The preparation method comprises the following steps: firstly, amidating long-chain fatty acid of which the carbon atom number is greater than 10 and hydroxyethyl ethylenediamine, and then carrying out ring-opening addition on the amidated long-chain fatty acid and EO under the catalysis of AlMe3-NH4Cl or Me2AlNH2 to prepare a hydrophobic-hydrophilic block copolymer; the obtained leveling agent is high-concentration transparent liquid and is free of gel; the dyeing agent has excellent retarding property, migration property and dye dispersibility in dyeing of acid dyes such as chinlon, wool and the like, and can form a flexible lubricating film on the surface of a fiber, so that the problem that a fabric becomes hard after high-temperature setting is remarkably solved, and a softening agent after-finishing procedure is omitted.

The invention discloses a preparation method of novel acid dye dyeable spandex and spandex. The preparation method comprises the following steps: preparing a hydrophilic polyurethane stock solution and preparing a normal polyurethane stock solution, the preparation method comprises the following steps: mixing a hydrophilic polyurethane stock solution and a normal polyurethane stock solution according to a mass ratio of (50-20%): (50-80%), adding an auxiliary additive, mixing and curing; and carrying out dry spinning on the cured spinning solution to prepare the acid dye dyeable spandex. A group with good hydrophilicity is introduced into hydrophobic spandex, so that a water-soluble dye can enter the spandex more easily in the dyeing process, the hydrophilicity of the spandex is improved, and the dyeability is improved. In the preparation of the spinning solution, hydrophilic polyurethane molecules are introduced, so that the dispersion effect can be improved in the addition and blending process of auxiliary materials, and the small-particle-size powder is not prone to agglomeration.

The invention discloses a non-oxidation type coloring composition and application thereof, and relates to the technical field of daily chemical products. The non-oxidative coloring composition comprises the following components: an acid dye, a rheology modifier, an acid regulator and a hair conditioner. The weight ratio of the acid dye to the rheological modifier to the acid regulator to the hair conditioner is (0.4 to 5) to (1.2 to 3.6) to (1.5 to 4) to (0.2 to 0.45). According to the non-oxidation type coloring composition and the application thereof, the components in the composition cooperate with each other to play a synergistic role, so that pigments can be adsorbed and deposited on the surface of hair, and the non-oxidation type coloring composition has excellent color persistence, color uniformity and anti-staining property, is mild and non-irritating, and also has a certain conditioning and repairing effect on the hair. The non-oxidation type coloring composition provided by the invention can be applied to non-oxidation type hair dyes, including semi-permanent type hair dyes and temporary hair dyes.

The invention discloses a method for dyeing a brocade cotton fabric through vat dye long-vehicle continuous pad dyeing, and belongs to the technical field of printing and dyeing processing and dyeing and finishing engineering. The dyeing method comprises the following steps: padding a brocade cotton fabric semi-finished product in a vat dye liquor, drying, cooling, padding in a vat color developing working solution, and finally steaming, the steamed fabric is subjected to cold water washing, oxidation, soaping, hot water washing, continuous cold water washing and drying finally, and dyeing is completed. According to the invention, a long-vehicle continuous pad dyeing technology is adopted, and synchronous dyeing of the vat dye on two heterogeneous fibers nylon and cotton is realized by padding a reduction developing working solution (the main components of which comprise caustic soda, sodium carbonate, sodium hydrosulfite and industrial salt) and performing steaming developing. The production process is short, the fabric cloth cover leveling property is good, the light fastness is high, and the problem that acid dye dyed chinlon fabric is not resistant to high-temperature washing is solved.

The invention relates to the field of dye chemistry, and discloses an acid dye with high color fastness, a preparation method of the acid dye and application of the acid dye in textile dyeing. According to the dye molecule, a 4-sulfo benzene ring and a 2, 5-dichlorobenzene ring are connected through an azo bridge (-N = N-), and a polysulfonate substituent group (-SO3Na) is introduced to a molecular skeleton to form a symmetric azo conjugated structure. The preparation method comprises the steps of nitration, reduction, sulfonation, diazotization, coupling and the like, the process conditions are mild, and the yield is stable. The obtained dye has a strong absorption peak in the range of 540-560nm, and the molar absorption coefficient epsilon is greater than or equal to 1.0 * 10 < 5 > L.mol <-1 >. Cm <-1 >. Compared with the conventional acid red dye, the dye has the advantages that the light fastness can reach grade 8, the fastness to washing is grade 7 or above, the color is bright, the color layer is uniform, the high dye-uptake can be realized under the low-salt condition, the conductivity of waste liquid is remarkably reduced, and the dye is suitable for dyeing protein fibers such as wool, nylon and silk.

This invention provides an antistatic dyeable spandex fiber and its preparation method. During spandex production, N-(2-hydroxyethyl)ethylenediamine is used as a terminating agent for chain extension, combined with the use of the stabilizer TAD, to prepare antistatic dyeable spandex fiber. This improves the dyeing rate and color fastness of spandex fiber to acid dyes and reactive dyes. Furthermore, the heat-resistant dyeable spandex can meet the high-temperature dyeing requirements in the polyester / spandex field. Simultaneously, the improved antistatic properties of the spandex fiber reduce the amount of oiling agents used by spandex manufacturers, thereby lowering production costs. For subsequent processes, it reduces the defect rate in dyeing, finishing, and weaving, saving costs.

This invention discloses a 1,6-diamino-dibenzo[a,o]perylene-7,16-dione-2,5-disulfonic acid derivative, its preparation method, and its application. Using a vat dye derivative PR177 as the parent material, a 4,4'-diamino-1,1'-dianthraquinone-3,3'-disulfonic acid derivative is formed by the Ullmann condensation of a 1-amino-4-bromoanthraquinone-2-sulfonic acid derivative. This derivative is then cyclically closed via the McMurray reaction to form the 1,6-diamino-dibenzo[a,o]perylene-7,16-dione-2,5-disulfonic acid derivative. This allows for direct dyeing without the use of sodium hydrosulfite. Compared to soluble vat dyes, it is stable when exposed to air. Furthermore, due to its good planarity, it exhibits excellent dyeing performance as an acid dye. It combines the advantages of good directness of vat dyes and good water solubility of acid dyes, especially showing excellent color fastness and exhaustion rate in wool dyeing.

The invention relates to the technical field of tobacco processing, in particular to a method for inhibiting oxidative discoloration of a colorant for colored cigarette paper, and aims to solve the problem that when water-soluble azo acid dyes (such as lemon yellow and sunset yellow) coexist with a citrate combustion improver, synergistic degradation is easy to occur under illumination and high-temperature processing conditions to cause discoloration. Sodium hexametaphosphate with the mass being 0.5%-10% of that of dye is introduced into a coloring system to serve as a stabilizer. Sodium hexametaphosphate not only can chelate metal ions in a system, but also can effectively block free radical chain reaction caused by citrate, and reduce direct attack of alkali metal ions on dye chromophores, so that efficient color protection is realized through an ion isolation-free radical quenching dual mechanism. Experiments show that dye conversion can be remarkably inhibited, the inhibition rate can reach 85% or above under the optimal addition amount, and the batch color difference problem of colored cigarette paper is fundamentally solved.

The invention discloses a synthetic method of a water-based polyurethane color fixing agent for nylon dyed by an acid dye, aiming at the property of nylon dyed by the acid dye, poly (butylene adipate-1000) and polyethylene glycol-1000 are mixed to prepare cationic water-based polyurethane, so that the dyeing percentage is increased, and the treated nylon has higher K / S value and color fastness; meanwhile, N, N-dimethyl-N, N-bis (2-ethoxyl) ammonium chloride is selected as a cationic chain extender of the waterborne polyurethane, compared with a traditional cationic chain extender, a neutralization procedure necessary for a traditional route is omitted, the risks of neutralization amount deviation, local acid excess and the like are avoided, and the production process is simplified.

The invention relates to a PA12 / PA6 parallel composite elastic fiber and a preparation method thereof. Nylon 12 is adopted as a high-shrinkage component, PA6 is adopted as a low-shrinkage component, parallel compounding is achieved, industrial production with high spinning speed and no yarn breakage can be achieved, and real production significance is achieved. Meanwhile, the PA12 / PA6 parallel composite elastic fiber is excellent in elastic property, low in modulus, soft and skin-friendly, has excellent dyeing property in an acid dye system, and provides a new solution for elastic high-end fabric.

The invention provides PEI (polyethyleneimine) functional modification based on magnetic nano silicon oxide and a preparation method and application thereof, and belongs to the field of organic-inorganic composite adsorption materials. The invention provides PEI modification based on magnetic nano silicon oxide. The PEI modification comprises the following raw material components in percentage by mass: magnetic ferroferric oxide, ethyl orthosilicate, APTES (3-aminopropyltriethoxysilane), glutaraldehyde (50%) and PEI. The preparation method comprises the following steps: firstly coating the surface of magnetic ferroferric oxide with nano silicon oxide, then introducing amino of APTES, and finally grafting PEI on the surface of the material by taking glutaraldehyde as a cross-linking agent. The PEI modified magnetic nano silicon oxide material provided by the invention can remarkably improve the adsorption effect on acid dye acid lake blue A, and is convenient to recycle due to magnetism.

The invention provides a wood dyeing method, and belongs to the technical field of wood dyeing. The method comprises the following steps: bleaching wood, pretreating the bleached wood by using an inorganic alkaline solution, placing the pretreated wood in a cation modification solution for cation modification, and placing the cation modified wood in an acid dye dyeing solution for dyeing to obtain the cation modified dyed wood. The inorganic alkaline solution is used for pretreating the bleached wood, under the alkaline condition, hydroxyl groups on the surface of wood fibers are more easily activated, the reaction activity of the wood fibers is improved, cationic groups in the cationic modifier and hydroxyl groups in wood cellulose are more easily subjected to chemical reaction, and therefore more stable covalent bond combination is formed; more cationic modifiers are grafted to wood fibers through a chemical grafting method, more groups with positive charges are introduced to the surface of wood, then the dye uptake is increased, and the cationic modifier is suitable for dyeing processing of wood materials such as recombined decorative veneers and veneer veneers.

The invention relates to the field of textile auxiliaries, in particular to a high-dispersity acidic leveling agent and a preparation method thereof. The leveling agent provided by the invention is prepared by compounding the following raw materials in parts by mass: 2.5-15 parts of an anionic dispersant, 30-60 parts of a thixotropic agent, 35-60 parts of a surfactant and 5-10 parts of water, wherein the thixotropic agent is prepared by amidating long-chain fatty acid with more than 10 carbon atoms with hydroxyethyl ethylenediamine in sequence and then carrying out ring-opening addition with ethylene oxide. The high-dispersion acidic leveling agent provided by the invention is simple in preparation process, can be mixed at normal temperature, is suitable for acid dye dyeing systems such as chinlon and wool, and can improve the dye utilization rate and omit the subsequent softening and finishing process.

The invention relates to a waterborne polyurethane emulsion as well as a preparation method and application thereof. The waterborne polyurethane emulsion is prepared from the following raw materials in parts by weight: 50 to 200 parts of polyether polyol, 100 to 250 parts of polycarbonate polyol, 40 to 100 parts of isocyanate, 1 to 10 parts of nonionic polyol containing a polyoxyethylene group structure, 5 to 20 parts of a chain extender and 400 to 700 parts of an emulsifier. The chain extender comprises a combination of a hydrophilic sulfonic acid chain extender and an aliphatic polyamine derivative chain extender. The preparation raw materials of the water-based polyurethane emulsion are reasonably designed, so that the water-based polyurethane emulsion which can improve the wear-resistant color fastness of acid-dyed base cloth, reduce the fading problem of the acid-dyed base cloth after the acid-dyed base cloth is impregnated and improve the texture of the acid-dyed base cloth, such as velvet feeling, meat feeling and elastic feeling, and has certain water resistance is prepared.

The invention discloses a light-color sunscreen fabric, a preparation method thereof and a sunscreen garment, and belongs to the technical field of textile fabrics. The preparation method comprises the steps that firstly, coated yarn is provided, spandex serves as core yarn of the coated yarn, and extinction chinlon with the special-shaped section serves as outer wrapping fiber of the coated yarn; step 2, knitting the coated yarn according to a double tricot stitch to obtain a gray fabric; the length of each coil of the double tricot stitch is 0.25 to 0.28 cm, and the length of an arc is 0.06 to 0.09 cm; and step 3, carrying out light-color dyeing on the gray fabric by using an acid dye under an acid condition, and then treating the gray fabric by using a phenol anti-yellowing auxiliary agent to obtain the light-color sunscreen fabric including white. According to the light-color sunscreen fabric, the acid dye is selected for dyeing under the acid condition, the phenolic anti-yellowing auxiliary agent is added in the post-finishing process of the fabric, and the yellowing risk is effectively reduced (the color fastness to light yellowing is 4-5 levels).

The invention discloses acid dyeable melt-spun spandex and a preparation method thereof, and belongs to the technical field of fiber manufacturing. A preparation method of acid dyeable melt-spun spandex comprises the following steps that melt-spun spandex slices are extruded and plasticized through a single screw, a cross-linking agent is added, and the acid dyeable melt-spun spandex is prepared through melt spinning; the melt spinning spandex slices contain carbodiimide groups; the cross-linking agent contains a carbodiimide group and tertiary amine ester. According to the invention, a tertiary amino structure is introduced into the cross-linking agent and then is further introduced into spandex macromolecules, so that a dyeing seat of an acid dye is provided, and the prepared acid dyeable spandex has very good washing color fastness. According to the invention, a high-rigidity carbodiimide structure is introduced into spandex macromolecules, so that the heat resistance of the acid dyeable spandex is improved, elasticity loss is avoided during sizing at 170-180 DEG C, and the requirement of nylon blending sizing is met.

To provide a hair-dyeing composition having stable hair-dyeing power even to the difference of hair quality for the purpose of remarkably suppressing stains on the skin, a bathtub and a washstand which cannot be realized by a conventional hair-dyeing composition.SOLUTION: The ink composition contains at least one dye selected from an HC dye, a basic dye, a direct dye, and an acidic dye and contains a hydrophobically modified polyether urethane.SELECTED DRAWING: Figure 1

The present invention belongs to the technical field of multi-layer stealth materials, and discloses a wide-spectrum stealth fabric based on exfoliated graphene and a preparation method thereof. Graphene exfoliated from cellulose nanowhiskers is used as an anti-infrared additive, and the anti-infrared additive has a layered structure. A nylon camouflage fabric is printed and dyed with acid dyes to prepare a wide-spectrum stealth fabric covering visible light, near-infrared light, and short-wave infrared light. The graphene aqueous dispersion prepared by the liquid phase exfoliation method avoids the environmental damage caused by the use of strong acids in the traditional reduction-oxidation method for preparing graphene, while ensuring the integrity of the graphene sheet structure, which can give the fabric excellent performance. The nylon camouflage fabric is printed and dyed with acid dyes and carbon nanomaterials, and the dyeing and functionalization of the fabric are simultaneously achieved, effectively shortening the finishing process and saving energy.

The invention relates to the technical field of spinning, and discloses a method for carrying out chinlon inkjet printing by adopting acidic / disperse dye compound digital printing ink, which comprises the following steps: (1) carrying out sizing pretreatment on chinlon fabric by adopting pretreatment slurry, and then drying; (2) compounding an acid dye and a disperse dye, adding a humectant, an adhesive, a surface tension regulator and water, regulating ink jet parameters, and filtering through a filter membrane to obtain compound digital printing ink; and (3) carrying out ink-jet printing on the chinlon fabric by using the compound digital printing ink, and then drying to obtain the ink-jet printed chinlon fabric. The method comprises the following steps: firstly, carrying out sizing pretreatment on the chinlon fabric by using the compound slurry, and then carrying out inkjet printing on the chinlon fabric by using the compound digital printing ink, thereby finally obtaining the chinlon printed fabric with high color depth value, high saturation and clear pattern.

This invention discloses a multifunctional anti-wrinkle agent for nylon dyeing, its synthesis method, and its application, belonging to the field of textile auxiliaries technology. The anti-wrinkle agent is a polyester polyether compound containing polymeric cashew bisphenol. Specifically, it is based on ortho-cashew bisphenol polyoxyethylene ether, which is sequentially polymerized with a polyester linker and a polyether linker. After neutralization and sulfonation, the target product is obtained. By controlling the reactant ratio and reaction process parameters, the product is made into an anionic polymer compound. In the acid dyeing process of nylon, it can be efficiently adsorbed onto the surface of nylon fibers, effectively preventing problems such as scratches, bark wrinkles, and abrasions during the dyeing process of nylon fabrics. It also significantly improves the hydrophilicity and hand feel of nylon fabrics, exhibits high stability under 98℃ dye bath conditions, and has good compatibility with weakly acidic and neutral dyes, without forming lakes, oil spots, or color stains, thus improving the overall quality of nylon fabric dyeing and finishing.

The invention discloses a light fastness improver for an acid dye as well as a preparation method and application of the light fastness improver. The light fastness improver is prepared from the following components in parts by mass: 30 to 72 parts of benzotriazole or triazine ultraviolet absorbent; 5-25 parts of a dispersant; 1-6 parts of a solvent; and the balance of water. The preparation method comprises the following steps: firstly, uniformly mixing the dispersing agent, the solvent and the water, adding the mixture into the ultraviolet absorbent, putting the mixture into a mixing kettle or a grinding machine, and stirring and mixing for 0.5-2 hours or grinding for 4-8 hours at room temperature to prepare the light fastness improving agent. The light fastness improver disclosed by the invention is attached and permeated on a fabric for dyeing an acid dye through a dyeing one-bath method or a padding method, so that the light fastness of the fabric is obviously improved. And after treatment, the influence on after-finishing processing is small.

The invention provides an acid dye composition, an acid dye, a preparation method and application. The acid dye composition comprises the following components: a component A as shown in a formula (I), a component B as shown in a formula (II) and a component C as shown in a formula (III). The acid dye composition and the acid dye provided by the invention have small color difference after being subjected to one-bath dyeing treatment on chinlon and spandex blended fabric, and the saturation and fullness of a cloth cover are high; the acid dye composition and the acid dye provided by the invention have excellent color fastness.

The invention relates to a uniform dyeing and high-color-fixation piece dyeing process suitable for various fabrics. The fabric is prepared by the following method: pretreatment: pretreating a whole costume blank of various fabrics to obtain a pretreated blank; dyeing: immersing the pretreated blank in a dyeing solution, and dyeing to obtain dyed gray cloth; post-treatment: sequentially carrying out color fixation, soaping and hot drying on the dyed gray cloth to obtain dyed clothes; the effective components of the dye liquor comprise a reactive dye, a weak acid dye, sulfate, a level dyeing color fixing agent and an acid material; the leveling color fixing agent is composed of a leveling activator, tetramethyl ammonium polyhedral oligomeric silsesquioxane and sulfonated modified cellulose nanocrystals, and the leveling activator is composed of multiple of N, N '-(1, 2-ethanediyl) diaspartic acid, sucrose octasulfate sodium, fatty alcohol-polyoxyethylene ether and polyethylene glycol monooleic acid phosphate. By means of the process, better evenly-dyed and high-color-fixation piece-dyed clothes can be efficiently obtained.

The invention relates to the technical field of dyeing and finishing, and particularly discloses a same-color dyeing and finishing process for wool and cellulosic fiber blended or interwoven fabric. Comprising the following steps: S1, blending or interweaving cellulosic fibers and wool, and carrying out scouring and bleaching or oil removal treatment to obtain a pretreated fabric; s2, dyeing the pretreated fabric by using a neutral or common active material and a dyeing auxiliary agent, and then performing soaping treatment to obtain a wool shallow cellulose deep fabric; the dyeing auxiliary agent comprises 2-8 wt% of a dye-retarding agent and 20-120 g / L of anhydrous sodium sulphate; and S3, complementarily dyeing a certain amount of acid dye on the wool light cellulose deep fabric to obtain the same-color fabric. According to the same-color dyeing and finishing process, the dye adsorbability of the cellulosic fibers is improved while the color grabbing problem of the wool to the cellulosic fibers is weakened, so that the color of the wool can be more accurately adjusted when the dyed fabric is dyed by the secondary acid dye, and good homochromatism of the wool and the cellulosic fibers is realized.

An ink jet textile-printing ink composition according to the present disclosure contains an acidic dye having water solubility of 30 g / L or less at 20° C., a water-soluble organic solvent, and water, wherein a glycol-based solvent and a cyclic-amide-based solvent are contained as the water-soluble organic solvent, and the cyclic-amide-based solvent contains one or both of ε-caprolactam and N-hydroxyethyl-2-pyrrolidone.

One or more embodiments of the present invention relate to a resin composition which contains at least a polymer (A) and a polymer (B), wherein: the polymer (A) contains one or more monomers that are selected from the group consisting of acrylonitrile, vinyl halides and vinylidene halides; the polymer (B) dissolves in benzyl alcohol; and from 70 parts by mass to 92.5 parts by mass of the polymer (A) and from 7.5 parts by mass to 30 parts by mass of the polymer (B) are contained if the total amount of the polymer (A) and the polymer (B) is taken as 100 parts by mass. The present invention provides a synthetic fiber which is easily dyeable with an acidic dye without requiring use of a special facility or heating to high temperatures.

The application relates to a coal-based solid waste micro-electrolysis ball and a preparation method and a dye wastewater treatment method, wherein the coal-based solid waste micro-electrolysis ball is prepared by uniformly mixing a solid mixture and a sodium silicoaluminate aqueous solution and then high-temperature calcining; the solid mixture comprises coal-based solid waste, steel slag and kaolin, the mass ratio of the coal-based solid waste to the steel slag is 0.5-2, and the content of the kaolin is 20% of the mass of the solid mixture; the mass fraction of the sodium silicoaluminate aqueous solution is 2-5%, and the solid-liquid ratio of the sodium silicoaluminate aqueous solution to the solid mixture is 1-5 g / ml. The dye wastewater treatment method adopts a three-stage micro-electrolysis tank, the adsorption-electrochemical-flocculation mechanism of the micro-electrolysis ball is strengthened by changing a micro-electrolysis environment, high-salt strong-acid dye wastewater is efficiently pretreated, the coupling of multiple mechanisms is realized, and the utilization rate of the micro-electrolysis ball is improved. The application realizes comprehensive utilization of the coal-based solid waste and the steel slag, treats waste with waste, and improves the sewage treatment effect through a three-stage wastewater treatment process.

The present invention aims to provide a hair dye composition and hair dyeing method that achieve both uniform coloring and deep coloring without requiring advanced beauty techniques. [Solution] A hair dye composition comprising (A) at least one dye selected from the group consisting of basic dyes, HC dyes, acid dyes, and nitro dyes, (B) 0.1 to 10% by mass of a foaming agent (excluding components that fall under (C) below), and (C) at least one component selected from the group consisting of (C1) nonionic surfactants, (C2) polyhydric alcohols, and (C3) fatty acids, wherein the mass ratio (A) / (C) of (A) to (C) is 0.7 or less.

The invention relates to a low-temperature sintered CeO2 / SiC catalytic membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing SiC, a nanoscale CeO2 sintering aid, a dispersing agent and water according to a mass ratio of 10: (1-8): (0.5-1): (81-90), carrying out ball milling to obtain mixed slurry, and adjusting the pH value to 9-12 for later use; coating a SiC support body with the mixed slurry liquid, and drying to obtain a double-side coated SiC blank body; and sintering the double-sided coated SiC green body at the temperature of 500-800 DEG C to finally obtain the low-temperature sintered CeO2 / SiC catalytic membrane. Wherein the particle size of the nanoscale CeO2 sintering aid ranges from 5 nm to 200 nm. Compared with the prior art, the method has the advantages that the firm CeO2 / SiC ceramic membrane can be successfully obtained under a relatively low-temperature condition, and the prepared low-temperature sintered catalytic membrane has excellent catalytic performance and can be successfully applied to treatment of high-temperature acid dye wastewater.