33results about How to "Low chroma value" patented technology

The invention discloses a post processing method for the dyeing of all-cotton knitted fabrics that applies an immobilized laccase, belongs to the technical field of the application of the dyeing and finishing treatment of the knitted fabrics in the printing and dyeing industry, and aims at solving the technical problems that traditional post processing of the knitted fabric dyeing has high soaping temperature, large water consumption and residual washing water with deep chromaticity and achieving the goal for optimizing the post processing effect of the dyeing. The post processing method of the invention adopts calcium alginate and gelatinum as carriers so as to implement the imbedding of the laccase, improves the immobilization efficiency of the laccase in the carriers through glutaraldehyde crosslinking, improves the heat and pH stability of the laccase in the carriers by adding polyethyleneglycol, and realizes the circulation of the immobilized laccase in the post enzyme-washing treatment of the dyeing of the all-cotton knitted fabrics by adding carmowax to improve the thermal stability and the pH stability of the laccase in the carriers. By adopting the post processing method of the invention, the enzyme-washing technique with the immobilized laccase can replace traditional chemical soaping techniques, can not only effectively remove superficial loose color of the dyed all-cotton knitted fabrics and improve the wet processing fastness of the fabrics, but also effectively lower the chromaticity of the post processing residual liquid and release the burden of the sewage treatment of the printing and dyeing, and the post processing method of the invention is favorable for protecting ecological environment.

The invention provides a soap-free acrylic acid latex, and a preparation method thereof and application in water-based ink. On one hand, a polymeric surfactant can be used to replace the prior surfactant during the reaction process; and after the latex is dried and forms a film, compounds with low molecular weight are reduced greatly and the water resistance of the film is effectively improved. On the other hand, protective glue is introduced into the reaction process to change the rheological property of the latex, and the rheological property of the latex is close to that of Newtonian liquid; simultaneously, the protective glue can also further improve the mechanical stability of the latex and make the latex more suitable for the water-based ink.

The invention belongs to the field of wastewater treatment, and relates to a printing-dyeing wastewater purifier and a utilization method of the printing-dyeing wastewater purifier. The printing-dyeing wastewater purifier is characterized by being prepared from the following raw materials in terms of parts by weight: 15-25 parts of polyacrylamide, 10-15 parts of bamboo charcoal, 15-30 parts of sodium carbonate, 15-25 parts of concentrated hydrochloric acid, 15-25 parts of sodium sulfate, 15-25 parts of perlite, 5-15 parts of sawdust, 25-35 parts of diatomaceous earth, 15-20 parts of bentonite, 10-15 parts of potassium permanganate, 20-30 parts of quaternary ammonium salt, 5-10 parts of fruit shell filter materials, 10-18 parts of medicinal stone, 15-25 parts of coconut shell activated carbon and 20-35 parts of cation exchange resin. The printing-dyeing wastewater purifier and the utilization method of the purifier have the advantages that not only can printing-dyeing wastewater with high erchrominance and higher concentration be treated, but also the printing-dyeing wastewater after the treatment of the purifier is colorless and odorless, and has obviously-reduced CODcr (Chemical Oxygen Demand chromium) value and BOD5 (Biochemical Oxygen Demand 5) value; moreover, secondary pollution can be avoided in the process of treating the printing-dyeing wastewater by utilization of the purifier, and the effects of low cost, simple operation and convenience in promotion are achieved.

The invention discloses a production method of a single nitrogenous heterocyclic ring-containing compound. Lactone and fatty amine which are cheap and easy to obtain are used as raw materials for producing the single nitrogenous heterocyclic ring-containing compound; lactone and fatty amine are used for synthesis of amide, and hydrodeoxygenation is carried out in order to obtain the corresponding nitrogenous heterocyclic compound. The process has only two reaction steps, and has the advantages of low investment, high yield, simple separation for intermediate products, few by-products, and easy processing.

The invention relates to the technical field of treatment of textile printing and dyeing wastewater, in particular to a combined process for treating textile printing and dyeing wastewater, comprising the steps such as neutralizing, coagulating and precipitating, filtering with an O/A combined biofilter, activating with an active enzyme promoter, adsorbing with a constructed wetland tank, precipitating, sterilizing, and discharging; the combined process provided by the invention has good wastewater purifying effect and enables continuous treatment of batch production wastewater.

The invention relates to the field of water environment pollution treatment and discloses a deep treatment method for up-to-standard printing and dying industry wastewater, which is based on a dielectric barrier discharge low-temperature plasma discharge device, and the dielectric barrier discharge low-temperature plasma discharge device can generate a low-temperature plasma environment with the temperature of 10 DEG C to 50 DEG C. The method is characterized that: an open container containing printing and dying industry wastewater coming up to the national first-grade discharge standard is placed in the low-temperature plasma environment with the temperature of 10 DEG C to 50 DEG C to carry out decolorization and degradation, wherein the depth of the printing and dying industry wastewater is 0.1cm to 1cm, the input power of the dielectric barrier discharge low-temperature plasma discharge device corresponding to each square centimeter of water surface is 0.175W to 1.364W, and the time of decolorization and degradation is 3 to 5 minutes.

The invention discloses a starch phosphate-containing papermaking wastewater treatment agent. The treatment agent consists of the following components in parts by weight: 5-10 parts of starch phosphate, 2-3 parts of polymeric phosphate-ferric chloride, 3-4 parts of polyethyleneimine, 7-9 parts of active carbon, 5-8 parts of magnesium carbonate and 155-165 parts of water. The prepared starch phosphate-containing papermaking wastewater treatment agent can be used for quickly reducing the chromaticity and the suspension content in the papermaking wastewater and reducing the total amount of pollutants in the papermaking wastewater.

The invention discloses a method for treating high-concentration emulsion wastewater. The comprises the following steps: the high-concentration emulsion wastewater is filtered by an inorganic membraneto perform oil-water separation in order to obtain an inorganic membrane liquid concentrate and a clear liquid; the clear liquid enters a catalytic oxidation system and undergoes catalytic oxidationtreatment; catalytic oxidation treatment effluent is adsorbed by activated carbon, enters an ultrafiltration membrane device, and is ultrafiltered to obtain an ultrafiltered liquid concentrate and ultrafiltration membrane effluent; the ultrafiltered liquid concentrate returns to the catalytic oxidation system, and is mixed with a supernatant, and the obtained mixture is oxidized; and the ultrafiltration membrane effluent enters a reverse osmosis membrane device, and undergoes reverse osmosis treatment to obtain a reverse osmosis liquid concentrate and a permeate, and the reverse osmosis liquidconcentrate returns to the catalytic oxidation system and is oxidized. The inorganic membrane adopted in the method can resist high oil and high solid content treatment during separation, and the whole system has a good stability and a strong impact resistance; and a catalytic oxidation technology adopts a small amount of reagents, is a pure chemical treatment technology, and does not produce liquid concentrate, sludge or other pollutants.

The invention provides a capacitive touch screen and a production method thereof. The capacitive touch screen is flexible, curlable, thin, light, low in surface resistance, highly light-permeable and low in chroma. The capacitive touch screen comprises a flexible transparent film substrate. By reactive magnetron sputtering, a first Nb2O5 film layer, a first Nb2Ox(0<x<5) film layer, a first SiO2 film layer, a first SiOx(0<x<2) film layer and a first ITO (indium tin oxide) layer are sequentially deposited on the upper surface of the flexible transparent film substrate; and a second ITO film layer is arranged on the lower surface of the flexible transparent film substrate.

The invention discloses a composite adsorption treatment material for wastewater containing nitrobenzene, which comprises the following raw materials in parts by mass: 15-30 parts of hydroxypropyl cellulose graft copolymer, 5-8 parts of oxyferric chloride, 4~10 parts of cationic etherified starch, 2~8 parts of activated carbon fiber, 5~10 parts of activated alumina, 2~6 parts of polyepichlorohydrin, 1~4 parts of porous hydroxyapatite powder, hydrophobic modified wood 5~12 parts of cellulose fiber, 6~10 parts of polyhydroxyaluminum silicon chloride, 10~18 parts of nonionic polyacrylamide and 12~20 parts of adsorbent NSUL-1. A composite adsorption treatment material for the treatment of nitrobenzene-containing wastewater provided by the present invention produces a synergistic adsorption treatment effect through reasonable raw material compounding, and has good performance on the main pollutant in nitrobenzene-containing wastewater-nitrobenzene The adsorption treatment effect, and can effectively reduce the chroma value and COD of sewage, with excellent comprehensive water treatment effect.

The invention discloses a method for preparing diisobutyl phthalate. The method comprises the following steps: 1, preparing a magnetic nanoparticle-supported acidic ionic liquid used as a catalyst; and 2, preparing the diisobutyl phthalate: carrying out refluxing dehydration condensation on phthalic anhydride and isobutanol under the catalysis of the magnetic nanoparticle-supported acidic ionic liquid for 3-6 h to obtain a diisobutyl phthalate reaction solution, cooling the reaction solution to room temperature, filtering the cooled reaction solution, adsorbing the obtained filtrate I by a solid alkali, performing filtration to obtain a filtrate II and a filter cake respectively, and carrying out reduced pressure dealcoholysis on the filtrate II to obtain the diisobutyl phthalate. The magnetic nanoparticle-supported acidic ionic liquid is used as the catalyst to achieve catalytic synthesis of the diisobutyl phthalate, so the method has the characteristics of high catalysis efficiency,easiness in recovery and reuse of the catalyst, simple process and less waste water discharge.

The invention discloses a printing and dyeing wastewater regenerant as well as a preparation method and a use method thereof, the printing and dyeing wastewater regenerant is applied to printing and dyeing wastewater of reactive dyes and comprises the following components in percentage by mass: 0.1-2% of a dye molecular cluster complexing dispersant, 0.1-20% of a chromophoric group targeted positioning dissociation oxidant and 0.1-3% of a pH regulator. The printing and dyeing wastewater regenerant prepared by the invention can effectively reduce the conventional reactive dye soaping post-treatment operation procedures, and has remarkable water-saving, energy-saving and emission-reducing benefits.

The invention belongs to the field of oil-containing wastewater treatment, and discloses a pretreatment method of oil-containing organic wastewater. The method comprises the steps of regulating the pH value of the oil-containing organic wastewater to 6-9; adding an iron salt or an iron salt polymer into the oil-containing organic wastewater of which the pH value is adjusted, and mechanically stirring for the first time to obtain a first mixture system; adding a polyacrylamide solution into the first mixture system, and carrying out second mechanical stirring to obtain a second mixture system; adjusting the pH value of the second mixture system to 3-5 while carrying out secondary mechanical stirring on the second mixture system to obtain a third mixture system; and filtering the third mixture system to obtain filtrate. According to the pretreatment method of the oil-containing organic wastewater, oil substances and solid particles in the oil-containing organic wastewater can be removed, the chromaticity can be reduced, the pretreated effluent can meet the requirements of a subsequent process on the quality of inflow water, and adverse effects on the subsequent wastewater treatment process are avoided.

The invention discloses a dyeing low-temperature post-treatment auxiliary of a pure polyester fabric and polyester-containing fabrics and a post-treatment technology thereof. The post-treatment auxiliary is prepared from the following components: 300-600 g/kg of rongalite, 50-400 g/kg of biological enzyme and 100-500 g/kg of Gemini cationic surface active agent. By compounding the dyeing post-treatment auxiliary of the polyester fabric or the polyester-containing fabric, then using the post-treatment auxiliary for conducting dyeing low-temperature post-treatment on the polyester fabric or thepolyester-containing fabric, and using a synergistic effect mechanism among the three components, low-temperature post-treatment processing is conducted on of the polyester fabric or the polyester-containing fabric is realized, the defect that traditionally, the polyester fabric or the polyester-containing fabric needs to be subjected to post-treatment under a high temperature condition is overcome, dye which is washed into a solution does not stain the fabrics any more, moreover, post-treatment printing and dyeing wastewater is colorless, which is beneficial for wastewater treatment, and thefabrics subjected to post-treatment have soft hand feelings, and are excellent in fastness.