9results about How to "Good decolorization" patented technology

The invention provides an efficient and environment-friendly printing and dyeing sewage decolorizing agent which is mainly prepared from the following raw materials in parts by mass: 10-17 parts of nanoscale silicon dioxide, 5-12 parts of concentrated sulfuric acid, 8-13 parts of a polyacrylamide emulsion, 5-17 parts of lignosulfonate, 3-10 parts of a metal ion chelating agent and 10-25 parts of deionized water. The decolorizing agent provided by the invention has good adsorption performance and chemical stability, and is low in cost and high in decolorizing efficiency on printing and dyeing sewage.

The present application relates to the field of microbial technology and wastewater treatment, and specifically discloses a Kodamaea ohmeri strain with azo dye degradation function and its application. The strain was preserved in the China General Microbiological Culture Collection Center on September 30, 2022, with the preservation number of CGMCC No. 25860. The strain is isolated from the soil of Dongzhaigang Mangrove Nature Reserve in Hainan, and has decolorization and degradation effects on azo dyes such as reactive black 5, reactive brilliant red K-2G, reactive brilliant red X-3B, and methyl orange. The strain can adapt to changes in a relatively wide range of environmental factors such as salinity, pH, and temperature, and has a certain tolerance to the concentration of representative disazo dye reactive black 5. This provides a possible source of yeast strains for the biodegradation of azo dyes, and has good theoretical research value and broad application prospects in the field.

The invention relates to the technical field of fabric recycling and reusing, in particular to a process for degrading colored waste PET fabric and recycling BHET, which comprises the following steps: S1, mixing a composite catalyst, the colored waste PET fabric and ethylene glycol, adding into a reaction kettle, heating to 150-165 DEG C, controlling the pressure in the kettle to 0-0.2 MPa, carrying out degradation reaction for 2-6 hours, and filtering to remove insoluble impurities after the degradation reaction is finished, so as to obtain a mixed solution; an alcoholysis solution is obtained; s2, decolorizing the alcoholysis solution obtained in the step S1 through a multi-stage resin tank to obtain a mixture containing ethylene glycol and a product; and S3, mixing the mixture obtained in the step S2 with deionized water, heating to 95-100 DEG C, cooling to 70-80 DEG C after the mixture is completely dissolved, continuously stirring for 1-3 hours, carrying out hot filtration to obtain filtrate A and a solid A, continuously cooling the filtrate A to-10 to-5 DEG C, stirring for 8-12 hours, filtering to obtain filtrate B and a solid B, and drying the solid B to obtain the BHET. The process disclosed by the invention is relatively good in decolorization efficiency on the colored waste PET and high in BHET yield, and meanwhile, the solvent can be efficiently recycled, so that resource waste is reduced.

The invention belongs to the technical field of desulfurization wastewater, and provides a preparation method of a desulfurization wastewater flocculant, which comprises a water-soluble high-molecular compound flocculant and an inorganic iron salt flocculant, and comprises the following components in percentage by weight: 0.01-2% of polyacrylamide, 0.01-15% of polyquaternium, 1-30% of polyferro-aluminum, 0.001-5% of a surfactant and the balance of water. The preparation method comprises the following steps: firstly, preparing a polysilicate ferric sulfate aluminum solution, then mixing and stirring polyacrylamide, polyquaternary ammonium salt, polyaluminum ferric sulfate, a surfactant and water to obtain a semi-finished solution, and finally, mixing the polysilicate ferric sulfate aluminum solution with the semi-finished solution to obtain a final solution; the water-soluble high-molecular compound flocculant and the inorganic iron salt flocculant are compounded together, so that the coagulation performance can be improved, impurities and pollutants in water can be quickly reacted, coagulated and precipitated, the water quality is effectively improved, the use amount is small, the cost is low, harmful substances are not contained, and the influence on human health is avoided.

The application relates to a shooting jacket weaving process and relates to the technical field of textiles, and comprises the following steps: step S1, putting warp yarn raw materials on a warp beam and performing warping through a warping machine; step S2, passing the prepared warp beam through manual or equipment to perform healding; step S3, installing weft yarn on a water jet device; step S4, performing weaving on the warp yarn and the weft yarn through a water jet loom; when step S4 does not perform water jetting, the height position of the nozzle is a standby position higher than a working position, when water jetting is started, the nozzle is controlled to move downward to a working position of weft insertion height, and when water jetting is ended, the nozzle is moved upward to the standby position. Through upward deviation of the nozzle in the height direction, downward deviation of the front end and the tail end of water jet flow is compensated, so that the contact of the front end and the tail end of water jet flow on the warp yarn is reduced, the phenomenon of broken spandex of the warp yarn in the weft insertion process is reduced, the wetting amount of the warp yarn is reduced, the fabric is more easily dried in the later period, and the problems of decoloration and quality reduction of the warp yarn are also improved.

The invention discloses a nano composite material as well as a preparation method and application thereof. The preparation method of the nano composite material comprises the following steps: mixing tetrabutyl titanate and water, and dispersing for 1-4 hours to obtain hydrolysate; adding biochar with the persistent free radical content of 4.52 * 10 < 19 > spins.g <-1 >-6.81 * 10 < 19 > spins.g <-1 > into the hydrolysate, and continuously dispersing for more than 4 hours, preferably 5-10 hours; performing vacuum filtration and drying to obtain a precursor; and activating the precursor at high temperature for 2-5 hours in an inert atmosphere to obtain the nano composite material. The nano composite material provided by the invention has a remarkable decolorizing effect on AAS salt, has small chromaticity change under a long-term storage condition, and has excellent decolorizing stability.

The invention belongs to the field of organic matter refined titanium tetrachloride decolorization, and particularly relates to compound waste mineral oil for refining and decolorizing crude titanium tetrachloride and a preparation method of the compound waste mineral oil. Transferring the mixed oil product A into a mechanical stirrer for heating, and adding the waste transformer oil to obtain a mixed oil product B; transferring the mixed oil product B into a stirrer for heating, and adding waste engine oil to obtain a mixed oil product C; transferring the mixed oil product C into a stirrer for heating, adding the waste vacuum pump oil to obtain a mixed oil product D, and cooling the mixed oil product D to room temperature to obtain the target composite waste mineral oil. The contents of the waste gasoline, the waste diesel oil, the waste transformer oil, the waste engine oil and the waste vacuum pump oil in the composite waste mineral oil are 5-10%, 5-20%, 10-20%, 20-40% and 20-50% in sequence. According to the method, the content of silicon chloride and ferric chloride can be remarkably reduced while the content of vanadium chloride in the crude titanium tetrachloride is removed.

The invention relates to a regenerated DMT decoloration recovery method and system, and the method comprises the following steps: a first purification tank, a second purification tank and a third purification tank are sequentially connected in series; dimethyl phthalate to be recycled is added into a first purification tank, a second purification tank and a third purification tank; monitoring the real-time temperatures of the dimethyl phthalate in the first purification tank, the second purification tank and the third purification tank, and heating the dimethyl phthalate in the first purification tank, the second purification tank and the third purification tank when the real-time temperatures of the dimethyl phthalate in the first purification tank, the second purification tank and the third purification tank are lower than a first preset value; compared with the prior art, the method has the advantages that the material flow direction is flexibly controlled according to the dimethyl phthalate purification degree; when the purifying agent of any one purification tank is replaced, normal work of the other two purification tanks is not affected, continuous decoloration can be achieved, efficiency can be improved, and dimethyl phthalate can be prevented from being converted into a solid state.

The invention relates to the field of lignocellulose biomass pretreatment, and discloses a method for removing impurity molecules in lignocellulose hydrolysate by an ultrafiltration membrane, which comprises the following steps: S1, corncob dilute acid pretreatment, S2, corncob acid hydrolysate pretreatment by an ultrafiltration method, S3, analysis method, and S4, ultrafiltration process data processing. The PES10 ultrafiltration membrane can effectively decolorize the lignocellulose acid hydrolysate, few entrapped mixed sugars and inorganic salts, the recovery rate of fermentable sugars after ultrafiltration treatment is 70%-80%, about 20% of sugars are left in the trapped fluid, the trapped fluid is washed and filtered to reduce the loss of the sugars so as to improve the total recovery rate of the sugars, and the cost is reduced. The decolorization effect of the organic ultrafiltration membrane with the molecular weight cutoff of 10kDa is optimal, so that the hydrolysate can be pretreated through ultrafiltration before entering the bipolar membrane electrodialysis device.