摘要:
A floatation method for the regeneration of waste paper employs as a deinking agent a reaction product of an alkylene oxide with a mixture of products obtained by the reaction of a natural oil or fat with an alkanolamine in a mole ratio of the natural oil or fat to the alkanolamine of products is in the range from 1:0.1 to 1:3,, wherein the amount of the alkylene oxide is in the range from 100 parts by weight to 1000 parts by weight based on 100 parts by weight of the mixture of products, provides pulp having higher degree of whiteness and less residual ink and problems caused by pitch than pulp prepared by a corresponding floatation method which employs a conventional deinking agent.
摘要:
Disclosed is a method of removing ink from xerographically printed paper. The method comprises pulping said printed paper in an aqueous slurry at a non-acidic pH to a consistency of about 8% or less. Next, added to the pulp slurry is a sufficient amount of long chain alcohol, the long chain alcohol having a melting point above room temperature, for a time sufficient with heating at a temperature sufficient, whereby an agglomeration of long chain alcohol and ink particles is formed. Next, the heating is stopped whereby the agglomeration solidifies into particles that settle to the bottom of the pulp slurry. Then, the agglomeration of solidified particles is removed from the pulp slurry thereby leaving a remaining slurry of deinked paper fiber and water. Optionally, the remaining slurry is subjected to flotation to remove substantially any remaining minute ink left particles behind after the agglomeration.
摘要:
A process for treating a re-pulped coated broke slurry comprising the addition of a water-soluble polymer dispersion, the water-soluble polymer is formed by polymerizing a water-soluble mixture which comprises: (a) a first cationic monomer represented by the following formula (I): ##STR1## and/or a second cationic monomer represented by the following general formula (II): ##STR2## and (b) (meth)acrylamide in an aqueous solution of a polyvalent anion salt, wherein the polymerization is carried out in the presence of either an organic high-molecular multivalent cation comprising a water-soluble polymer containing at least one monomer of formula (II) or an alkyl ester of acrylic acid.
摘要:
A method of deinking waste paper for reclamation thereof, which comprises disintegrating waste paper with an alkali in water in the presence of a polyoxyalkylene ether compound having the formulaR-O(PO)x(AO)y(PO)z-Hwherein R is an alkyl or alkenyl of 8-22 carbons, or an alkylphenyl wherein the alkyl has 4-12 carbons; PO is an oxypropylene group; and AO is an oxyethylene group, or a mixed oxyalkylene group composed of an oxyethylene group and at least one oxyalkylene group selected from the group consisting of an oxypropylene group and an oxybutylene group: and x is a numeral of 3-15, y is a numeral of 20-40, and z is a numeral of 5-20, in an amount effective as a deinking agent.
摘要:
Deinked paper/wood pulps are improvedly bleached to high levels of whiteness by conjointly treating such pulps with a sulfite bleaching agent, e.g., Na.sub.2 SO.sub.3, NaHSO.sub.3 or mixture thereof, or SO.sub.2 and NaOH, and a reducing agent more electronegative than the sulfite ion, e.g., thiourea dioxide, sodium borohydride or sodium dithionite, in a reaction medium having an initial pH ranging from 6 to 12, advantageously followed by washing sulfite and reducing agent values from the bleached pulp and then treating the washed pulp with hydrogen peroxide in an aqueous alkaline medium.
摘要翻译:通过用亚硫酸盐漂白剂(例如Na 2 SO 3,NaHSO 3或其混合物)或SO 2和NaOH联合处理这种纸浆,以及比亚硫酸盐离子更具电负性的还原剂,将脱墨的纸/木纸浆漂白至高白度。 ,二氧化硫脲,硼氢化钠或连二亚硫酸钠,在初始pH范围为6至12的反应介质中,有利地随后从漂白的纸浆中洗涤亚硫酸盐和还原剂值,然后用碱性水溶液中的过氧化氢处理洗涤过的纸浆 中。
摘要:
Apparatus and method for separation, recovery, and recycling municipal solid waste and the like by introducing solid waste materials into a rotatable pressure vessel, rotating, pressurizing, adding pH controlling chemicals and heating the pressure vessel and thus the waste material while simultaneously applying a mixing action to the solid waste material. The addition of a predetermined amount of pH controlling chemicals and the application of a vacuum serve to control the moisture content of the final fine organic portion of the processed material. Organic contents of the vessel are pulped and sterilized when processed to facilitate ease of separation and prepare the resulting cellulose material for use.
摘要:
The removal of hydrophilic flexographic inks from a pulp fiber slurry in a flotation or flotation/wash deinking system is accomplished by using a combination of (a) a fatty acid or salt thereof, (b) a rosin acid or salt thereof, and (c) a non-ionic or anionic surfactant along with water having a hardness of about 80 to 500 ppm Ca.sup.+2.
摘要翻译:通过使用(a)脂肪酸或其盐,(b)松香酸或其盐和(c)的组合来实现在浮选或浮选/洗涤脱墨系统中从纸浆纤维浆料中除去亲水性柔性油墨 )非离子或阴离子表面活性剂以及具有约80至500ppm Ca + 2的硬度的水。
摘要:
A method of removing fine contaminants from waste paper fibrous material (S) is described with solution (1) and pre cleaning (2) whereupon the fibrous material is first subjected to a washing treatment (3) and then to a flotation treatment (5). The washing filtrate (12) from the washing treatment (3) is cleaned in a filtrate-flotation treatment (4) so that a cleaned fraction (14) can be returned into the useful material (13) of the washing treatment. The so cleaned waste paper fibrous material can be passed to further treatment steps such as flotation, bleaching and/or dispersion. The reject material from the filtrate-flotation (4) is, in one embodiment, again subjected to a flotation treatment.
摘要:
A method for deinking of repulped xerographic paper comprising adding an organic polymeric particulate and a substantially water insoluble organic ester to a repulped aqueous slurry containing xerographic toner particles in an amount sufficient to at least partially agglomerate the xerographic toner particles within the slurry to larger particle sizes; and removing the xerographic toner particles from the slurry by one or more liquid/solid separation techniques.
摘要:
A process is disclosed for deinking pulp which has been made from paper printed with oil based ink. The process uses a surfactant component with and at least one alkoxylated diamine selected from Formula I: ##STR1## where X, Y, W and Z may be alike or different and are each independently selected from the group consisting of(i) --(CH.sub.2 --CH(CH.sub.3)--O).sub.a (CH.sub.2 --CH.sub.2 --O).sub.b --;(ii) --(CH.sub.2 --CH.sub.2)--O).sub.c (CH.sub.2 --CH(CH.sub.3)--O).sub.d --; and(iii) random copolymers of ethylene oxide and propylene oxide,wherein a, b, c and d are each selected independently to be a number between 1 and 30 so as to give an HLB value between 5-15.