15results about How to "Improve bleaching effect" patented technology

The invention provides kenaf whole stalk APMP pulp and a preparation method thereof.The preparation method comprises the specific steps that S1, air-dried kenaf whole stalks are cut into strips, washing and impurity removing are conducted, and a material a is obtained; s2, carrying out pre-steaming treatment on the material a, and extruding and defibering the steamed material to obtain a material b; s3, adding the material b into the pre-impregnation liquid for impregnation to form slurry, and performing centrifugal dewatering on the slurry until the concentration is 20-30wt% to obtain slurry a; s4, grinding the pulp a to form high-concentration ground pulp, adding the high-concentration ground pulp into the adjusting liquid a, bleaching, and centrifugally dewatering until the concentration is 20-30wt% to obtain pulp b; s5, the pulp b is added into the adjusting liquid b for second-stage bleaching and centrifugal dewatering till the concentration is 20-30 wt%, pulp c is formed, the pulp c is diluted and ground, cleaning and screening are conducted after grinding is completed, and the kenaf whole stalk APMP pulp is obtained. The kenaf whole stalk APMP pulp has good pulp characteristics, the dependence of traditional APMP pulping on wood is broken through, and the current situation that domestic pulping wood resources are deficient is relieved.

The invention provides biomass cotton cellulose based on waste cotton textiles and a preparation method thereof, and the method comprises the following steps: crushing the waste cotton textiles, sterilizing, disinfecting, drying, dipping in alkali liquor and cooking, adding a DES eutectic solvent, mixing, pulping the obtained material, bleaching, desanding, concentrating and papermaking to obtain the biomass cotton cellulose. Wherein a metal chlorate catalyst and an auxiliary agent are added during cooking. According to the method, the waste cotton textile is adopted as a raw material, and the cotton cellulose with excellent performance is prepared by performing high-added-value recovery on the waste cotton textile, so that the environmental problem caused by the waste cotton textile can be effectively relieved, and the resource waste is reduced. Meanwhile, the production cost of the cotton cellulose can be reduced, and the problem of insufficient production raw materials of existing biomass cellulose products is solved.

The invention discloses a recycling treatment method of printing and dyeing wastewater. The method is used for treating boiling wastewater, bleaching wastewater, dyeing wastewater and washing wastewater which are respectively generated in a desizing boiling process, a bleaching washing process, a dyeing process and a washing process of textiles. The bleaching wastewater is subjected to second ultrafiltration treatment, a second ultrafiltration filtrate is introduced into a microbubble generation device to be treated and then reused in the desizing and boiling process, the boiling wastewater is subjected to first ultrafiltration treatment, a first ultrafiltration filtrate is subjected to first nanofiltration treatment, and a first nanofiltration filtrate is reused in the washing process. After the dyeing wastewater is subjected to second nanofiltration treatment, second nanofiltration filtrate is recycled to the washing process. The wastewater generated in the textile printing and dyeing process is subjected to resource utilization, water with different characteristics is subjected to corresponding treatment and then recycled to different process units, the effect of the desizing and boiling process can be enhanced, and resource utilization of the wastewater is achieved to the maximum extent.

The invention discloses a cashmere and wool ecological phosphate-free acidic rapid bleaching process, which comprises a bleaching treatment step and a post-bleaching treatment step, the bleaching treatment step is to load cashmere or wool to be treated into a machine, and a bleaching liquid is added; in the post-bleaching treatment step, a deoxidizing enzyme preparation is added to remove residual hydrogen peroxide, and then drying treatment is performed. The bleaching auxiliary combination used in the process can quickly remove natural grease, pigments and impurities in cashmere and wool in a short time, and a good bleaching effect is achieved. By optimizing the concentration and proportion of the bleaching agent, the bleaching rate is improved, meanwhile, the tenderness of wool fibers in the bleaching process is ensured, and fiber breakage or strength reduction cannot be caused. In the bleaching process, treatment is carried out under the conditions of low temperature (50-70 DEG C) and normal pressure, so that the damage of high temperature to wool fibers can be effectively reduced, the toughness and luster of the fibers are kept, and meanwhile, the bleaching reaction rate is accelerated.

The invention belongs to the technical field of organic compounds and artificial boards, and relates to a whitening agent, a preparation method thereof and application of the whitening agent in whitening type medium density fiberboards, the whitening agent comprises the following components by mass percent: 2-5% of hydrogen peroxide, 0.2-0.6% of sodium silicate, 0.5-1.5% of sodium hydroxide, 0.1-0.4% of water-soluble stilbene fluorescent whitening agent and the balance of water. The preparation method comprises the following steps: sequentially adding the components into water at 60-65 DEG C, stirring and dissolving, and keeping the temperature at 60 DEG C for later use. When being applied, the cleaning agent is added in a wood chip washing process, the mass of the cleaning agent is 1-1.5% of the total mass of cleaning water for the first time, and 0.05-0.08% of the cleaning agent is supplemented per hour subsequently. According to the whitening agent, through the synergistic effect of chemical oxidation and physical color complementing, the whiteness of a fiberboard reaches 31-36 (only 14 in a conventional process), the physical and chemical properties meet the GB / T 11718-2021 standard, and the whitening agent is environmentally friendly, free of residues, simple to prepare and apply, suitable for industrial continuous production and capable of remarkably improving the added value of products.

The utility model relates to the technical field of elastic grey cloth production, and discloses an elastic grey cloth production pretreatment device with a high-elasticity function, which comprises a treatment box, a tensioning assembly is arranged at the top of an inner cavity of the treatment box, the tensioning assembly comprises an electric push rod, the telescopic end of the electric push rod is fixedly connected with a transverse plate, and the transverse plate is fixedly connected with the elastic grey cloth. The two sides of the transverse plate are movably connected with tensioning rollers through movable shafts. And stretching assemblies are arranged at the tops of the two sides of the inner cavity of the treatment box. According to the utility model, through the arrangement of the tensioning assembly, the tensioning degree of the elastic gray fabric during conduction can be adjusted when the elastic gray fabric is bleached, so that the elastic gray fabric can be bleached in an optimal tensioning range, and the bleaching effect is improved; according to the stretch device, the elastic gray fabric entering the treatment box to be bleached can be subjected to wrinkle stretch operation, the upper and lower stretch rollers are matched, the upper and lower surfaces of the elastic gray fabric can be stretched at the same time, and the stretch effect is improved.

The utility model discloses a corrugating medium environment-friendly low chlorine residue bleaching device in the technical field of corrugating medium production, which comprises a bleaching pool, a dust filtering box and a cleaning box, the dust filtering box is fixedly connected to the right side wall of the bleaching pool, the cleaning box is fixedly connected to the top of the dust filtering box, and the dust filtering box is fixedly connected to the right side wall of the bleaching pool. A net plate is fixedly connected between the inner side walls of the cleaning box, ultrasonic transducers are fixedly connected to the front side wall and the rear side wall of an inner cavity of the cleaning box, an ultrasonic generator is fixedly connected to the front side wall of the cleaning box, and the ultrasonic generator is electrically connected with the ultrasonic transducers through wires. The environment-friendly low-chlorine-residue bleaching device for the corrugating base paper is reasonable in structural design, chlorine-containing residues of the corrugating base paper can be reduced, the use safety of the corrugating base paper can be guaranteed, chemical precipitation can be avoided, and the bleaching effect of the corrugating base paper can be improved.

The invention discloses an integrated processing device for bleaching grey fabric of non-woven fabric, and relates to the technical field of fabric bleaching. The integrated processing device for bleaching grey fabric of non-woven fabric comprises a bleaching tank, in which a plurality of guide rollers arranged in an "S" shape are arranged. The guide rollers arranged in an "S" shape are used to guide and convey the grey fabric body, so that the bleaching time thereof can be increased. During the conveying, bubbles are blown out through the air outlet holes on the surface of the guide rollers to stir the bleaching agent, thereby enhancing the fluidity of the bleaching agent and making it more uniform. At the same time, the blown bubbles can impact and clean the impurities on the surface of the grey fabric body, which is convenient for the impurities to fall off, thereby improving the bleaching effect and efficiency. In addition, the bleached grey fabric body can be reciprocally beaten and vibrated, so that the bleaching agent solution on its surface is vibrated and falls off into the bleaching tank, which can not only increase the efficiency of the subsequent dehydration and drying of the grey fabric body, but also avoid the waste of bleaching agent.

The invention relates to the technical field of textile fabric production, in particular to a washing device for textile fabric production, which comprises a shell, a plurality of shells are fixedly mounted at the inner bottom end of the shell from front to back, and a plurality of concave frames are fixedly mounted at the inner bottom end of the shell from front to back. The water washing device for textile fabric production has the function of simulating scrubbing of textile fabrics during bleaching, so that the textile fabrics are in full contact with a bleaching agent solution, impurities and stubborn stains on the textile fabrics can be removed, the bleaching effect and the cleaning effect are improved, the quality of the textile fabrics is improved, and the service life of the textile fabrics is prolonged. Meanwhile, the cloth beating mechanism is arranged, so that the water washing device for textile fabric production further has a continuous beating effect on the textile fabric during bleaching, impurities and stains brought by the textile fabric entering the next shell are reduced, and the production efficiency is improved. The bleaching effect and the cleaning effect of the textile fabric are further improved.

The utility model provides a bleaching device for paper pulp processing, which belongs to the technical field of paper pulp bleaching and comprises a box body, a feeding pipe arranged on one side of the upper surface of the box body, a discharging pipe arranged in the center of the lower surface of the box body and a driving motor arranged in the center of the upper surface of the box body, and the output end of the driving motor penetrates through the center of the upper wall of the box body. A connecting column is arranged at the output end of the driving motor, connecting plates are arranged at the upper end and the lower end of the connecting column, a plurality of stirring rods are evenly arranged between the connecting plates, a plurality of stirring rods are evenly arranged on the surface of the connecting column, the stirring rods and the stirring rods are arranged in a staggered mode, a material guiding frame is arranged at the bottom of the connecting plate, and a plurality of material guiding rods are arranged on the surface of the material guiding frame. The device can improve the mixing efficiency, and is good in bleaching effect and high in practicability.

The invention relates to a method for improving the whiteness of a fabric containing soybean fibers. According to the method, a one-bath two-step low-temperature bleaching process is introduced. In the first stage, hydrogen peroxide is utilized to generate an efficient peroxy acid bleaching agent in a weak acid environment regulated and controlled by citric acid, and the bleaching efficiency of the fabric is remarkably improved by combining the chelation effect of the citric acid. In the second stage, two biocompatible components of sericin and chitosan are introduced, a compact and stable protection layer is formed on the surface of the fiber through a precise hydrogen bond network and electrostatic attraction by utilizing the excellent film-forming property, biocompatibility and air permeability of the sericin and the synergistic effect of the sericin and the chitosan, or the sericin and the chitosan are directly and tightly attached in a film fragment form; yellow pigment fading caused by free radical invasion and solarization is effectively resisted, and the obdurability and solarization resistance of the fabric are remarkably enhanced. According to the scheme, the efficient and environment-friendly bleaching effect is achieved, and the fabric is endowed with excellent protection performance.

The utility model belongs to the technical field of silkworm cocoon processing, and particularly relates to a silkworm cocoon degumming and bleaching integrated mechanism which comprises a box body, two guide rods are symmetrically installed between the two sides of the middle end of the box body, sliding blocks are installed on the outer walls of the guide rods in a matched and sliding mode, a connecting rod is installed in an installation base through a pin shaft in a matched mode, and a driving motor is assembled in an L-shaped plate. A rotating disc is installed at the output end of the driving motor, a fixing rod is installed on the edge of the rotating disc, one end of a connecting rod is installed on the outer wall of the fixing rod through a pin shaft in a matched mode, and a spraying assembly is installed on the bottom side of the sliding block. The driving motor is started to drive the rotating disc to rotate, the fixing rod rotates along with the rotating disc, the connecting rod drives the sliding block to slide back and forth along the guide rod, the spraying assembly moves along with the sliding block, and therefore silkworm cocoons in the box body are evenly sprayed, and it is ensured that the silkworm cocoons make full contact with bleaching liquid.

An environmentally friendly wood bleaching treatment method using ultraviolet photocatalysis is disclosed, belonging to the field of wood bleaching. This invention aims to solve the problems of low efficiency, yellowing of bleached wood, excessive bleaching waste liquid, and severe reduction in mechanical properties associated with existing bleaching methods. The treatment method includes: 1. Coating with bleaching solution; 2. Catalytic bleaching. This invention is used for environmentally friendly wood bleaching treatment using ultraviolet photocatalysis.

The invention is applicable to the technical field of China hemp fiber bleaching, and provides an intelligent China hemp fiber bleaching device which comprises a bleaching box and further comprises a transverse frame, an elastic telescopic cylinder, a guide sleeve, a guide roller, a supporting roller, a lifting plate, a telescopic cylinder and a transmission rod. The plurality of elastic telescopic cylinders synchronously contract towards the middle; when the telescopic cylinders drive the lifting plate to descend, the multiple elastic telescopic cylinders synchronously expand towards the two sides under the limiting effect of the strip-shaped holes on the transmission rods. And in the lifting movement process of the lifting plate, the buffer lifting assembly is used for extracting the bleaching agent in the bleaching box and conveying the bleaching agent to the hose in a buffer manner, and after the bleaching agent is conveyed through the transmission rod, the bleaching agent is finally sprayed out through the spray head and acts on the fiber materials. Through stable and dynamic S-shaped conveying of fiber materials and an intelligent buffer spraying mechanism, the bleaching efficiency and quality are remarkably improved.

The invention belongs to the field of titanium dioxide production by a sulfuric acid method, and particularly relates to a metatitanic acid bleaching method. The invention provides a bleaching method of metatitanic acid. The bleaching method comprises the following steps: S1, preparing 280-350g / L of metatitanic acid slurry; s2, adding sulfuric acid, heating while stirring, and heating the system to 60-70 DEG C; s3, adding a Ti < 3 + > solution and sodium formaldehyde sulfoxylate, stirring and preserving heat, and reducing Fe < 3 + > in the metatitanic acid slurry into Fe < 2 + >; wherein the mass ratio of Ti < 3 + > to sodium formaldehyde sulfoxylate in S3 is (3.5-8): (8-9). Through the synergistic effect of two reducing substances, namely Ti < 3 + > and sodium formaldehyde sulfoxylate, the bleaching effect is good, the use amount of sulfuric acid in the system is greatly reduced, and the production energy consumption is reduced.