308 results about "Deinking" patented technology

The present invention relates to a deinking composition and a method of deinking wastepaper by using a mixture of enzymes that act on constituents of all three waste paper components involved in ink retention on final pulp. The first component represents substrates located on the surface and in the internal waste paper structure. The second component represents substrates located in the interface between paper and ink, usually formed by coatings or size-press (starch containing or not) applied layers. The third component represents substrates located in the ink and/or toner compounds. This method provides improved performance in relation to conventional methods, or current deinking with enzymes, which acts on a limited number of substrates involved in ink retention on final pulp.

The present invention provides methods for deinking printed waste paper—particularly methods that use a deinking composition that includes a hydrophobically-modified inorganic particle (“MIP”) to improve ink collection efficiency under traditional alkaline, reduced alkali, and true neutral deinking conditions. Deinking compositions are provided that include a hydrophobically-MIP substrate, a nonionic surfactant, and a fatty acid, or mixtures thereof. The improved ink collection of the present invention can result in deinked pulp of high quality and/or yields that has excellent brightness and effective residual ink concentrations (“ERIC”) values.

The embodiment of the invention discloses a process for recycling and preparing coated white board paper by using waste paper. The process comprises the following steps of: taking waste paper, repulping, screening, deinking, deslagging, washing and concentrating, whitening, storing in a pulp pool and making paper, wherein the step of repulping comprises the steps of dispersing the waste paper into a fiber suspension liquid, heating the fiber suspension liquid to be at 40-55 DEG C, adding a cellulose liquid and rotating for 20-35minutes so as to conduct primary deinking; the step of deinking comprises a step of further deinking by using an ultrasonic generator; the step of whitening comprises steps of oxidation and reduction whitening; the step of making paper comprises the steps of respectively feeding the whitening pulp into a surface layer, a core layer and a base layer of a paper machine conveying system, respectively making the pulp into three layers by using a paper machine according to the ratio of 38-78wt%, 15-35wt% and 12-30wt%, and subsequently conducting composite paper making so as to manufacture a raw paper board. According to the process, no raw wood pulp is used, so that the resource is saved, the environment is protected, the production cost is lowered, and moreover the produced white board paper is good in whiteness, high in strength and applicable to requirements of high-quality package and decoration.

A waste new print zyme deinking technology includes crushing the pulp, deinking, suspension selection, washing, bleaching among which, deinking agent, laccase, amboceptor are added into the pulped with waste newsprints and waster to be inlet with oxygen and the pulp concentration is controlled at 3%-18%, temperature 20-70deg.C pulping, keeping warmth.

The invention discloses an environmentally friendly waste paper deinking method, which comprises the steps of: A. adding waste paper and water into a pulper, and simultaneously adding a biological enzyme which accounts for at least 0.01% of the weight of the waste paper, sodium hydroxide which accounts for at least 0.05% of the weight of the waste paper, and tall oil which accounts for at least 0.01% of the weight of the waste paper, controlling the pulping time at a minimum of 15min and the pulping temperature at a minimum of 35DEG C, thus obtaining a pulping slurry of a certain concentration; B. adding the pulping slurry into a flotation tank which has a ventilation volume of at least 25L/h and a pressure of at least 0.3MPa, and diluting the pulping slurry, with the flotation time maintained for at least 10 min; C. further diluting the pulping slurry and carrying out washing. The method of the invention uses tall oil and a biological enzyme for synergistic removal of ink from waste paper, and avoids the adverse effects of a surfactant on equipment and environments. Compared with waste paper deinking methods employing surfactants, the method provided in the invention produces a deinking slurry with substantially increased whiteness up to over 53%ISO, generates less dust, and make paper performance improved, thus boosting the progress of papermaking technologies.

The invention relates to the technical field of papermaking raw material processing, in particular to a process for preparing recovered pulp with high whiteness and high cleanliness in a papermaking industry. The process comprises the following steps of: selecting and feeding of waste paper raw materials; disintegration; screening purification; first flotation deinking; first concentrated heat dispersion; second flotation deinking; second concentrated heat dispersion; oxidation bleaching; reduction bleaching; and storage in a storage tower. According to the process, 20-30 percent of high-quality office waste paper and 70-80 percent of other low-quality waste paper raw materials are matched, so that the cost of the waste paper raw materials is effectively reduced, and the corporate profit is increased. An advanced rotary drum pulper, a pulping machine and a production line of office waste paper screening purification, flotation deinking, concentrated heat dispersion and pulp bleaching are introduced, and the recovered pulp is prepared through the efficient use of chemicals and an effective production control process. The whiteness of the recovered secondary pulp achieves 90 percent ISO, and the cleanliness is high. The whiteness and the cleanliness of finished culture paper are increased.

The invention relates to the technical field of paper making, and provides a method for producing environment-friendly electrostatic copying paper. The method comprises the following steps: using 10 to 20 percent of bleached chemical softwood pulp, 20 to 40 percent of bleached chemical hardwood pulp, 10 to 20 percent of BCTMP pulp and 30 to 50 percent of waste paper deinking pulp as paper pulp raw materials; adding chemical accessories and dyes into a pulp compounding pool; using corn starch and a starch modifier as surface treatment agents; making the compounded pulp into paper through a fourdrinier with a glue blender; and then further processing through finishing equipment to obtain the paper. Due to the adoption of the high-ash high-whiteness waste paper deinking pulp, the method for producing the environment-friendly electrostatic copying paper can effectively reduce the consumption of raw wood pulp and chemical raw materials, and is favorable for reducing the energy consumption, lightening the environmental pollution and saving the cost.

The invention relates to the technical field of cow card paper manufacture, in particular to pulping equipment and a pulping method for cow card paper. The pulping equipment comprises a pulper, rough sizing equipment, a grading sieve, long fiber treating equipment and short fiber treating equipment, wherein the long fiber treating equipment comprises fine sizing equipment, a heat dispersion deinking machine and a dise mill; and the short fiber treating equipment comprises a low-concentration desander, a light slag remover and another heat dispersion deinking machine. The pulping method comprises the following steps: a, pretreating wastepaper; b, sorting long fiber and short fiber; c, treating long fiber; and d, treating short fiber. Wherein, long fiber pulp stock is used for making the bottom layer of the cow card paper; 100 percent of the sandwich layer of the cow card paper and 30 to 50 percent of the surface layer of the cow card paper are short fiber pulp stock; and the surface layer contains 50 to 70 percent of wood pulp. The invention radically solves the appearance problems of paraffin points and black spots in the cow card paper, and reduces the production cost of the cow card paper.

The invention discloses a deinking agent for display window glass. The deinking agent is prepared from 30-70% of water, 5-20% of inorganic base, 0.5-8% of inorganic corrosion inhibitors, 7.5-16% of organic corrosion inhibitors, 5-20% of solvent and 5-20% of penetrant, and 7-22% of mixtures composed of alkyl alcohol ether polycarboxylate, alkyl polyoxyethylene phosphate and coco glucoside are added. In the heating application process, the deinking agent is capable of preventing a solution from being layered all the time, stable in performance and long in service life; due to the fact that the corrosion inhibitors are added, in the application process of the glass deinking agent, little corrosion is caused to a glass base plate, it is not easy to scratch the window glass, and the yield rate of the panel display window glass obtained after the deinking is raised; meanwhile, the deinking agent is great in penetrability, moderate in alkalinity and high in ink removal speed.

The invention discloses a clean production method of a plant fiber product, relating to the regeneration treatment on the black liquid generated by the deinking or degreasing or/and delignification in a production process of the plant fiber product or/and the implementation of interception-type recycling of the black liquid containing sodium ions, relating to the circulating water treatment and application in a production process in the field of different sub-products of the field of plant fiber products, relating to the treatment and utilization of the sludge obtained in black liquid regeneration and circulating water treatment processes, and relating to the blending treatment and utilization of drain water, wherein the plant fiber at least comprises any one of cotton and fibrilia crops, crop straw including any one of cotton straw, rice straw, wheat straw, reed, corn straw and the like, weed including any one of carex meyeriana, solidago decurrens and the like, broadleaf wood and the like including any one of poplar and eucalyptus, bagasse discarded by the sugar industry and any one of waste paper and old cotton or the combination of more than one waste plant fiber product and the like.

The invention discloses a method for improving a removal effect of ink in waste paper pulp. The method comprises the steps of: breaking waste paper, and diluting obtained pulp; then relative to the absolute dry mass of the paper pulp, adding 0.0025 to 0.5 percent of nonionic deinking agent into the pulp; at the same time, adding an anionic dispersant with a dispersion effect, wherein the consumption of the anionic dispersant is 0.001 to 0.3 percent of the absolute dry mass of the paper pulp; and floating at the temperature of between 40 and 50 DEG C after the mixture is stirred uniformly to remove the ink in the waste paper pulp, wherein the anionic dispersant is anionic polyacrylamide, or is one of polyacrylate and polymethacrylate. The method adopts the cheaper dispersant to compound the deinking agent with higher cost for floatation, which promotes deinking effect, and also solves the problems of cost increase caused by overhigh consumption of the deinking agent and the decrease of economic benefit caused by excessive fiber loss.

The invention discloses a newsprint neutral voiding method in the pulping paper making technique domain with pulping, floating, scrubbing and bleaching procedure, which is characterized by the following: adapting flotation-scrubbing method without alkali; inputting 0.1 úÑ-2.0úÑ voiding agent, 1úÑ-6úÑ inorganic salt in the floating course; controlling the floating paste density between 2 and 18 percent, temperature between 20 and 70 deg.c, pre-impregnated time between 0 to 40 min, floating time between 10 and 60 min, insulating time between 0 and 40 min; The method improves the voiding efficiency and voiding paste whiteness by 16.6 percent as well as reduces the CoDcr in the neutral voiding waste-water by 190mg/l, which lessens the waste-water pollution load.

The invention discloses an environment-friendly type production method of water transfer printing body paper. The method comprises the following technical steps: 1. crushing; 2. deinking; 3. pulping; 4. bleaching; 5. pulp matching; 6. papermaking; 7. surface sizing. For the water transfer printing body paper produced by the method, the fix quantify is 148-152 g/m<2>, the thickness is 190 to 200 [mu]m, the tightness is 0.73-0.77 g/cm<3>, the water suction height is greater than or equal to 36 mm/10 min, the surface suction weight is greater than or equal to 205g/m<2>, the whiteness is 78%-82%, the longitudinal breaking length is greater than or equal to 4500 m, the horizontal expansion and contraction ratio is smaller than or equal to 1.60%, the smoothness (positive/negative) is greater than or equal to 15 S, the wet strength is greater than or equal to 12.0 N, the paper moisture is from 4.0 to 5.5%, and the market requirement for the water transfer printing paper is completely satisfied.

The invention relates to Trametes Versicolor YS-L613 and a breeding method and application thereof. The Trametes Versicolor YS-L613 is prepared by the method through mutation breeding. The breeding method is to take Trametes Versicolor as a starting strain, adopt composite mutation breeding technology which combines UV, 60 CO, ultraviolet rays, nitrosoguanidine, ion implantation and microwave treatment, and breed the YS-L613 strain for high-yield production of laccase. The invention performs breeding operation through physiochemical treatment methods such as ion implantation, the ultraviolet rays and mutagen, finally obtains the YS-L613 strain for high-yield production of the laccase, and adopts experimental automatic control technology, strain fermentation control technology and strain extraction technology to develop laccase products. As proved by experiments of the laccase in pulp bleaching, fiber modification and pulp deinking, utilization of the laccase in the paper-making industry can improve the quality of paper, reduce environmental pollution and save the cost.

The present invention provides methods for deinking printed waste paper—particularly methods that use a deinking composition that includes a hydrophobically-modified inorganic particle (“MIP”) to improve ink collection efficiency under traditional alkaline, reduced alkali, and true neutral deinking conditions. Deinking compositions are provided that include a hydrophobically-MIP substrate, a nonionic surfactant and a fatty acid, or mixtures thereof. The improved ink collection of the present invention can result in deinked pulp of high quality and/or yields that has excellent brightness and effective residual ink concentrations (“ERIC”) values.

The invention discloses a deinking method of waste paper alkaline enzyme, comprising the following steps: carrying out soaking, disintegration, enzyme processing and washing on the waste paper to obtain the processed pulp; adding surface active agent when soaking at a usage amount of 0.10%-2.00%wt, wherein the enzyme processing is carried out under the conditions that the pH is 6-11, the temperature is 45-75 DEG C, and xylanase 30-150 mu/g of oven dry stock, pectinase 40-100 mu/g of oven dry stock and amylase 50-120 mu/g of oven dry stock are adopted to process the disintegrated waste paper for 10-30min. Cellulase can also be added in the enzyme processing procedure with an added quantity of 100 mu/g of oven dry stock. The processing effect is better if enzyme activator, such as sodium chloride is added in the enzyme processing procedure; and the alkaline enzyme can be bathed and used in a matching manner with a plurality of surface active agent, even with compounds with certain oxidation functions; and the process of waste paper deinking technology can be shortened and the bleaching process in deinking by the conventional enzyme method can be left out.

The invention provides an AIP (Aluminum Isopropoxide) type nonionic surfactant as well as a preparation method and application thereof. The chemical structural formula of the AIP type nonionic surfactant is as shown in the specification. The preparation method comprises the following steps of: adding IPDI (Isophorone Diisocyanate) into a reactor, heating to 50-70 DEG C while stirring, dropwise adding AEO (Fatty Alcohol Polyoxyethylene Ether) into the reactor while stirring, and then, continuing to stir and preserve the heat to react for 60-90min; and then, adding PEG (Polyethylene Glycol) into the reactor while stirring, and continuing to react at the temperature of 60-90 DEG C for 90-120min to obtain the AIP type nonionic surfactant. The preparation method has the advantages of simple preparation process and easiness for obtaining raw materials and controlling the reaction. Compared with a micromolecular surfactant sold on the market, the AIP type nonionic surfactant provided by the invention is longer in molecular chain, stronger in dispersing, collecting and washing capabilities for printing ink, capable of being independently used as a deinking agent for waste paper deinking or being used as a deinking agent for waste paper deinking after being compounded, good in deinking effect, high in whiteness of regenerated paper sheets, small in residual ink amount and favorable in application prospect.

The invention relates to a deinking agent, in particular to an environment-friendly mixed waste paper deinking agent. The prior waste paper deinking agent can only deink one class of waste paper in general. The invention provides the environment-friendly mixed waste paper deinking agent with wider application range, which is characterized in that the weight percentage of every component is: 5 to 10 percent of polyoxyethylene nonyl phenyl ether, 25 to 30 percent of fatty alcohol polyoxyethylene ether sodium sulfide, 5 to 10 percent of fatty alcohol polyoxyethylene ether, 10 to 20 percent of sulfonic acid, 4 to 10 percent of ethanol and the balance being water. Compared with the prior deinking agent, the deinking agent of the invention has the advantages of wide application range, good deinking effect and the like, and is few in components and simple in method.

The invention provides a paper-making environmentally-friendly mineral deinking agent. In the conventional anion and non-ion compound deinking agent and mineral material and surfactant compound deinking agent, waste gas and waste water are easy to produce in the production process of the deinking agent; and the product is difficult to biodegrade in the using process under the alkaline deinking condition. The paper-making environmentally-friendly mineral deinking agent comprises the following raw materials in percentage by mass: 5 to 35 percent of anion surfactant, 5 to 25 percent of stearic acid, 10 to 40 percent of silicate inorganic mineral soil, 5 to 20 percent of biodegradable nonionic surfactant, 0.5 to 5 percent of emulsifying agent, 0.01 to 2 percent of polyether type surfactant and 0.5 to 2 percent of inorganic salt electrolyte. By the paper-making environmentally-friendly mineral deinking agent, the effects of removing oily ink, water-based ink and sticky substances by using the deinking agent are improved obviously; the selected components have environmental friendliness and biodegradability and do not have toxicity to a human body and an environment; and secondary pollution is avoided.

The invention relates to a papermaking auxiliary agent, and more specifically relates to a low-foaming liquid polyether waste paper deinking agent and a synthetic method thereof. The low-foaming liquid polyether waste paper deinking agent is capable of completely replacing sodium soaps, and a main compound of the low-foaming liquid polyether waste paper deinking agent is a special polyether. The synthetic method comprises following steps: (1) adding an unsaturated fatty alcohol which is used as an initiator into a reaction vessel, adding potassium hydroxide which is used as a catalyst for reaction, removing water until weight ratio of water is less than 0.3%, and adding oxirane and epoxypropane separately so as to obtain unsaturated enol-polyether; (2) adding an unsaturated long-chain fatty acid, toluene solvent and a catalyst into the reaction vessel, heating to 60 to 80 DEG C, at the same time dropwise adding a mixed solution of the product obtained in step (1), acrylic acid and toluene, then heating the mixture to 70 to 85 DEG C, and keeping the temperature for 1.5 to 4h so as to obtain a product; and (3) mixing and reacting the product obtained in step (2), propylene glycol block polyether, fatty alcohol-polyoxyethylene ether-7 or fatty alcohol-polyoxyethylene ether-9, and water so as to obtain the special polyether.

The invention discloses a high-pulp-yield deinking method, and belongs to the technical field of pulp deinking. Waste paper containing ink is prepared into a pulp liquid, and the pulp fluid is subjected to ultraviolet radiation and is then stirred and soaked with a complex enzyme to obtain a mixed liquid; wheat straw powder, anthracite powder, starch and the like are stirred, pressed to be formed, and calcined together to prepare carbonized particles; the carbonized particles, the mixed liquid and fatty alcohol-polyoxyethylene ether are stirred and then subjected to flotation, the obtained floated pulp is diluted and filtered, and a filtrate is finally heated, concentrated and diluted to complete deinking, so that a deinked pulp is obtained. The operation process is simple and convenient, the deinking efficiency is effectively improved, the addition of the complex enzyme reduces the degradation and loss of a pulp fiber in the deinking process, the strength of the deinked pulp is high, the yield is high, in addition, the carbonized particle is further deinked, the environment pollution is not caused because no deinking agent is used, few glue matters are produced, and the method has an extensive application prospect.