242 results about "Indigo dye" patented technology

The invention discloses a stripping agent of indigo dyed pure cotton jean and a stripping method of the stripping agent, belonging to the technical field of jean stripping, wherein the stripping agent comprises following components by weight: 5-10% of a penetrating agent, 20-25% of a dispersant and the balance of water; the penetrating agent is an anionic surfactant; and the dispersant is any one of polyethylene glycol, polyether nonionic surfactant, polyvinylpyrrolidone, polyvinyl alcohol and polyacrylic acid. The stripping agent and the stripping method disclosed by the invention have good stripping effect and excellent environment protection performance, and are suitable for large-scale promotion in industrial application.

The invention belongs to the technical field of natural dyeing, and particularly relates to a preparation method and application of a natural plant dye. The invention provides a preparation method of a natural plant indigotin dye, which comprises the following steps: 1. cutting bluegrass branches and leaves, adding the bluegrass branches and leaves into a water-containing container, and fermenting for 5-7 days; 2. adding lime or oyster shell powder into the container; 3. stirring the lime or oyster shell powder to precipitate into a slurry; and 4. filtering the slurry to remove impurities and water to obtain the natural plant indigotin dye. The invention also provides application of the natural plant indigotin dye in warp dyeing of denim fabric weaving. The dyed warp is sized by a colorless plant starch slurry.

The invention discloses an indigo paste industrial preparation method, comprising a first step of raw material preparation, wherein mature indigo stems and foliages are cut into small parts by using a guillotine or a fiber cutter; a second step of raw material soaking, wherein the small parts are placed in a fermentation tank, fresh water is added for immersion, lime milk or industrial base is further added and thoroughly evenly stirring is carried out; a third step of sealed fermentation, wherein the fermentation tank is covered with a thin film for the sealed fermentation; a fourth step of impurities removal and standing, wherein after fermentation, fermentation broth is continuously turned and stirred, residue of the stems and foliages is then removed by filtering, and an indigo solution in the fermentation tank is discharged into a settlement tank for standing; and a fifth step of water filtering, wherein the indigo paste is obtained after a precipitate in the bottom of the settlement tank undergoes the water filtering. The method utilizes natural plant resources to prepare dye material through an industrial method, and the problem that the indigo dye preparation is troublesome is solved. With the method of the invention, the product has good and stable quality, treatment of three wastes is centralized, environmental pollution is reduced, and product cost is reduced. The method lays a foundation for batik product development.

The invention discloses a novel soft shape-maintenance knitted denim fabric production process, which comprises the following steps: selecting fabric, performing pretreatment, dyeing, performing aftertreatment, performing final finishing sizing and washing with water. According to the invention, the advantage of good color fastness of reactive-based indigo dye is strengthened, and the prepared fabric feels similar to reactive dye. Meanwhile, the advantages of being comfortable and elastic and maintaining the shape of knitted fabrics are combined. The production process disclosed by the invention enables the color fastness of the knitted denim fabric to meet the requirements of the latest national standard GB31701-2015 Technical Code for Safety of Infants and Children Textile Products.

The present invention discloses a continuous indigo blue electrochemistry reduction dyeing process, which is sequentially and continuously performed according to the following steps that: 1, under a low concentration medium condition, high concentration indigo blue is subjected to electrolysis reduction in a first electrochemistry reactor, the electrolyte is input into a leuco body dilution tank after 80-98% of the indigo blue is reduced into the leuco body, and concurrently the indigo blue and a dyeing liquid are added so as to maintain a indigo blue concentration in the first electrochemistry reactor; 2, the dyeing liquid is adopted to dilute the leuco body in the electrolyte into a required dyeing concentration in the leuco body dilution tank; 3, the diluted electrolyte in the step 2 is input into a dyeing machine, and a second electrochemistry reactor is adopted to control an electric potential of the dyeing liquid in the dyeing machine so as to completely convert the indigo blue into the leuco body; 4, the dyeing machine is opened after the electric potential of the dyeing liquid in the dyeing machine is stabilized so as to absorb the leuco body by cotton yarns; and 5, a filtration treatment is performed on the dyeing liquid used in the step 4, and recycling is performed. With the present invention, media loss can be reduced, dyeing work efficiency can be increased, and dyeing quality can be ensured.

The invention discloses a one-time deep dyeing method for a cotton fiber employing an indigo dye. The method is a process of finishing dyeing of the cotton fiber with the indigo dye in a non-aqueous medium of decamethyl cyclopentasiloxane (D5). The method comprises the following steps: (1) refining, washing and dewatering the cotton fiber, and controlling the final take-up rate for dyeing; (2) preparing a high-concentration indigo leuco body; (3) firstly, adding a proper amount of high-concentration indigo leuco body to the D5 to prepare a dye liquor, and then putting the cotton fiber with certain take-up rate into a non-aqueous dye liquor for dyeing; and 4) after dyeing, carrying out oxidation treatment, and then carrying out soap boiling to remove the surface floating color. The cotton fiber is dyed in the D5 by the indigo dye; oxidation of the indigo leuco body in the dyeing process and invalid decomposition of sodium hydrosulfite can be effectively suppressed; the one-time deep dyeing effect is reached; the dyeing procedure is greatly simplified; the dyeing time is shortened; the work efficiency is improved; the cost is saved; and dyeing wastewater emission is significantly reduced.

An indigo dyeing technology for the white silk fabric includes such steps as laminating 10-20 layers of tough paper with tung oil, drying in the air, fixing the 2-3 gummed plate together, drawing pattern, chiselling to become through pattern, grinding, putting the chiselled plate on white silk fabric, coating anti-dyeing slurry, drying the fabric in the sun, immersing in warm water at 30-50 deg.C for softening it, dyeing with plant indigo by immersion method, rinsing, drying and rolling. Said anti-dyeing slurry is prepared from soybean powder, lime powder, water and soybean oil.

The invention relates to an indigo-blue jean dyeing machine. The indigo-blue jean dyeing machine comprises a cloth feeding device, a cloth surface washing system, a cloth surface dyeing system, a cloth surface drying system, a cloth surface cooling system and a cloth discharging device, wherein the cloth surface dyeing system is composed of a continuous pad dyeing oxidization system and a level dyeing oxidization system; the pad dyeing oxidization system is composed of three groups of cloth surface dyeing grooves, two dyeing solution rollers and a cloth surface oxidization frame; the level dyeing oxidization system is composed of five groups of cloth surface dyeing grooves, a dyeing solution uniform roller and a cloth surface oxidization frame. The indigo-blue jean dyeing machine provided by the invention creates conditions for large-scale production of jeans of indigo-blue in longitude and latitude directions.

This invention involves an industrial scale preparation method for hydroxyacetonitrile by using acrylonitrile production byproduct hydrocyanic acid through a synthesis reaction with acetonitrile at the presence of catalyst. The method is characterized by (1) taking acrylonitrile production byproduct hydrocyanic acid as the raw material with content of 95% or above, (2) controlling a molar ratio of hydrocyanic acid : formaldehyde : catalyst at 1 : 1.0~1.5 : 0.001~ 0.015, (3) adding catalyst in formaldehyde while stirring, adding hydrocyanic acid at 0-20DEG C, and reacting at 0~40DEG C for 1~6 h, and (4) adjusting pH of 6 or below with inorganic acid to obtain hydroxyacetonitrile. The invention has the advantages of low cost, product content of 50% or above, simplified aftertreatment, no wastes discharge, and product with formaldehyde and hydrocyanic acid content less than 0.05%. Hydroxyacetonitrile can be used as the intermediates of glycin, malononitrile, and indigo dye to solve transport inconvenience of hydrocyanic acid and geographical limitation of production.

The invention discloses a preparation of a red mud-based polymer catalyst and an application of the catalyst in organic dye degradation. A preparation method respectively takes industrial solid waste red mud of different producing areas as raw materials to prepare the red mud-based polymer catalyst under the excitation of sodium silicate, and the preparation of the red mud-based polymer catalyst has the advantages that the red mud raw materials can be completely utilized and no three wastes are discharged. The red mud-based polymer catalyst is applied to the degradation reaction of an indigo dye wastewater solution under ultraviolet irradiation, the degradation rate of the red mud-based polymer catalyst reaches 100%, the degradation efficiency is high, dye molecules are completely degraded into CO2 and H2O, secondary pollution cannot be generated, and moreover, dual purposes of using waste to treat waste are achieved. The preparation and dye degradation of the red mud-based polymer catalyst are simple in reaction technology, so that the practical application of large-scale preparation and dye degradation can be realized.

The invention discloses a process for preparing wool denim fabric, which solves the problem that the existing wool fiber can not be used in the manufacture of denim fabric. The invention has simple method, convenient operation, and uses wool fiber in the manufacture of denim fabric. The method comprises first, taking shrinkproof top wool as raw material, second, adopting indigo dyes to dye chaine, steps comprise preprocessing under the temperature of 50-70 DEG C, washing in hot water under the temperature of 35-45 DEG C, washing in cold water in normal temperature, dipping for times, oxygenizing, dipping in acid whose PH value is 11.2-11.3, washing in water, carrying out soft process under the temperature of 50-70 DEG C, drying under the temperature of 80-100 DEG C, third, sizing on chaine, steps comprise reeling off through shaft, sizing, the temperature is 50-70 DEG C, wet splitting, drying, the temperature is 80-90 DEG C, dry splitting, and reeling, fourth, weaving denim cloth, fifth, post finishing wool denim cloth: genapping, diagonal tensioning, full-width scouring, full-width crabbing, relaxedly steam preshrinking, full decatizing and doffing cloth, finally obtaining finished product, namely wool denim fabric.

The invention discloses a method for recycling an indigo dye from the indigo waste coloring water. In the method, a proper filtration fabric is selected first for filtering the fibers and impurities in the waste water; then an acid liquid is added into the waste water the fibers and impurities of which are removed to adjust the pH value between 2 and 7; air is blown for oxidation to oxidize sodium salt of a water-soluble indigo leuco body into an insoluble solid indigo dye; finally the indigo dye and a condensed liquid which is rich in the dye are obtained through a microfiltration membrane device. The method has the advantages of less investment and simple device; the recycled indigo dye and the recycled condensed liquid can be recycled for coloring a fabric; besides, after the indigo waste coloring water is treated by the membrane, the chroma, the turbidity and the COD, and the like, are greatly reduced. The removing rate of effluent color dilution after the membrane treatment is larger than 98 percent; the turbidity is reduced by more than 97 percent and the COD removing rate is larger than 30 percent.

The invention discloses an indigo reduction staining deep dyeing promoter which is a high performance deep dyeing promoter for denim indigo dyeing reduction. The invention is prepared mainly by dispersant, sodium polyacrylate, anionic surfactant, industrial salt, at least one kind of C8-C18 fatty alcohol ethoxylate and at least one kind of rare earth sulfonate. When the deep dyeing promoter is used for indigo dyeing reduction for denim, depth and fastness of the dyeing denim are obviously improved, degree of dyeing is further improved, and using amount of toxic dye indigo and dyeing period are reduced.

The object of the invention is to provide a discharging agent for fibers dyed with an indigo dye and/or a sulfide dye, which enables stable discharge printing treatment to give the fibers soft texture, bright coloration and contours, which also enables printing. The object was achieved by the following: (1) A discharging agent for a fiber dyed with an indigo dye and/or a sulfide dye, consisting of chlorite and a viscosity-increasing nonionic surfactant, (2) a discharging agent according to the item (1), wherein the viscosity-increasing nonionic surfactant is a nonionic surfactant having HLB of 15 or higher, (3) a discharge printing process of a fabric or a sewing product dyed with an indigo dye and/or a sulfide dye, characterized in that a discharging agent having an adjusted pH of 7-12 and consisting of chlorite and a viscosity-increasing nonionic surfactant is printed on or applied to the fabric or the sewing product, followed by the application of a heat treatment, and (4) a discharge printing process according to the item (3), wherein the discharge printing treatment is performed simultaneously with, before, or after a coloring treatment.

The invention relates to the field of dye production, in particular to a method for recovering potassium and sodium mixed alkali solution in the production of indigo. The method comprises: introducing carbon dioxide gas into used mixed alkali solution in which the sodium ion molar ratio is slightly higher to form sodium carbonate, precipitating sodium carbonate and removing sodium carbonate to obtain the raffinate, namely the recovered mixed alkali solution in which the potassium ion molar concentration and the sodium ion molar concentration are closer. The recovered mixed alkali solution, after being concentrated and dehydrated, can be used as an alkali fusion solvent in the production of an indigo dye. In the recovering method, the ratio of potassium to sodium can be regulated by introducing tail gas of combustion of natural gas instead of supplying expensive potassium hydroxide, so the production cost is reduced greatly; and the ratio of potassium to sodium in the recovered mixed alkali solution is 1:(1-1.4), so the recovered mixed alkali solution is suitable to be used as the alkali fusion solvent in indigo production by various methods. When the recovering method is used, a large amount of sodium carbonate serving as an intermediate product can be obtained, and environmental protection performance is higher compared with directly discarding the excess mixed alkali solution in the past.

The present invention belongs to a biologic enzyme complexes technical field, especially relates to a novel cellulase complexes and a preparation method thereof, including the following raw materials be weight percent: neutral cellulase 5%-30%, ammonium dibasic phosphate: 20%-40%, ammonium dihydrogen phosphate 5%-20%, fatty alcohol polyethenoxy ether 2%-15%, Na[2]SO[4]: 25%-50%, cornstarch :2%-15%, color paste: 0.1-0.2%. The invention replaces the traditional ellulase preparation, has a global performance, non dusting, a high catalytic activity, a rapid rocket, a very low back staining phenomenon, and is environmental protection, is used for indigo dye rinsing of bronchobuster clothing with a good rinsing effect, and the prepared bronchobuster clothing has a special reminiscence style.

The invention discloses a distressed processing method for colored fabric, which is characterized in that a cation modification technology of yarn is added before the traditional yarn dyeing processing technology, so that the whole processing technology comprises the following steps in sequence: yarn preparation, cation modification of yarn, yarn dyeing processing, sizing, preshrinking, washing and finished products. The distressed processing method has the advantages that the surface layer of the yarn colors up uniformly, and the inner layer of the tarn maintains the original white core, so a clear skin - core effect is formed; the processed fabric has uniform ring dyeing and a uniform distressed treatment effect; by the combination application of a cation modifier and reactive dyes, the dyed fabric achieves the effect which sulfur dyes or indigo dyes can just achieve; and the distressed processing method greatly reduces energy consumption, reduces environmental pollution, ensures the stability and the production efficiency of dyeing, and enhances the quality of products.

The invention discloses an indigo dye and a preparation method thereof, and belongs to the technical field of dyes. The dye comprises the following components in parts by weight: 100 parts of water, 5-10 parts of indigo, 1-1.5 parts of a wormwood ash water solution and 0.5-1 part of arrack. The invention further discloses the preparation method for the dye. The preparation method particularly comprises three steps of indigo preparation, wormwood ash water solution preparation and dye preparation; defects that a prepared indigo dye is hard to color, the color of dyed cloth is not bright, the dyed cloth is likely to fade, and a preparation technology is complex in the prior art are effectively overcome; the dye has the benefits that the coloring effect is better, the color of the dyed cloth is bright, the dyed cloth is unlikely to fade, raw materials are easy to obtain, the preparation process is simple, and the operation is convenient.

The invention provides a bacillus subtilis ZNXH1 sourced bacterial laccase gene, bacterial laccase and application thereof, belongs to the technical field of biology, and particularly relates to a bacillus subtilis ZNXH1 sourced bacterial laccase gene cahh1, bacterial laccase CAHH1 expressed by the gene and application of the bacterial laccase CAHH1 in the fields of textile industry, environmental protection and the like. Compared with traditional laccase, the bacterial laccase CAHH1 has the advantages of remarkable application stability and broad spectrum effect, mainly including that (1) the bacterial laccase CAHH1 has better pH stability in a range of 3-9; (2) the bacterial laccase CAHH1 has better temperature stability in a range of 30-90 DEG C; and (3) the bacterial laccase CAHH1 has a strong decolorizing effect on indigo dye, azo dye and triphenylmethane dye. The bacterial laccase can be used for decolorizing industrial dye, has wide application prospects, can easily realize engineering preparation and has higher practical values.