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WO/1991/014821A1 |
In a method of recycling printed paper, the collector chemical used to aid ink removal after pulping of the paper, comprises a saponaceous product formed by reaction of a long-chain fatty acid, for example tall oil, and an amine, for exa...
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WO/1991/013926A1 |
The invention relates to water-soluble or water-dispersible compounds containing polyether chains and quaternary ammonium groups, a method for preparing them and their use in the recycling of waste paper.
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WO/1991/013924A1 |
The invention relates to water-soluble or water-dispersible compounds containing polyether chains and quaternary ammonium groups, a method for producing them and the use of these compounds to remove printing ink from printed waste paper ...
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WO/1991/013859A1 |
The invention concerns water-soluble or water-dispersible compounds containing alkylene oxide units and quaternary ammonium groups, a method for preparing such compounds and the use of the compounds for removing printing ink from used pr...
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WO/1991/011553A1 |
The invention relates to a process for the bleaching of chemical pulp, process which comprises one or several oxidation steps and one or several alkali treatment steps and in which the pulp is treated with an enzyme. The essential idea o...
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WO/1991/011424A1 |
The invention relates to alkoxylated compounds produced by reacting epoxylated C�10?-C�22? carboxylic acid derivatives with C�2?-C�4? alkylene oxides in the presence of alkoxylation catalysts and mono- and/or polyhydric alcohols.
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WO/1991/010773A1 |
A process for producing pulp substantially without the necessity for adding a nutrient or a cellulose degradation inhibitor, which comprises treating the raw material in the pulping step with a microorganism which grows well in a medium ...
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WO/1991/010724A1 |
A preparation exhibiting enzymatic activity and having the capability of delignifying wood pulp at a temperature of at least 65 �C and a pH of at least 9, is described. Said preparation is obtainable by aerobic fermentation of a Bacill...
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WO/1991/007542A1 |
Resin can be hydrolyzed enzymatically during the peroxy bleaching (e.g. with hydrogen peroxide) commonly used in pulp manufacture and the use of lipase in the manufacture of CTMP-fluff will afford several significant advantages, such as ...
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WO/1991/006701A1 |
The invention concerns a method of processing used paper and the use of certain hydroxysulphonate salts to remove printing inks from used paper and/or paper-processing water containing such inks.
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WO/1991/006217A1 |
The invention relates to a process of combatting microorganisms in industrial processes, particularly in the wood processing industry, by adding glucose oxidase and optionally glucose or a source of glucose to the process solution or slu...
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WO/1991/005905A1 |
The invention relates to aqueous dispersions of alkaline earth soaps and/or alkaline earth resin soaps for de-inking printed waste paper in which said dispersions contain: A) alkaline earth salts of C¿6-22? carboxylic acids and/or resin...
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WO/1991/005906A1 |
The invention relates to aqueous dispersions containing: A. C¿6-22? carboxylic and/or resin acids and: B. C¿6-22? oxoalcohols alkoxylated with 2 or fewer 6 mol C2-4 alkylene oxides, for de-inking waste paper.
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WO/1991/005908A1 |
A process for producing bleached lignocellulosic pulp for use in the pulp and paper industry having reduced total organically bound chlorine and reduced brightness reversion. Lignocellulosic pulp is subjected to one or more xylanase trea...
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WO/1991/003597A1 |
The invention relates to a flotation process for removing fillers from waste paper in the presence of at least partially water-soluble polymers and/or copolymers with mean molecular weights between 1 000 and 500 000.
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WO/1991/003599A1 |
Collector chemical for deinking of waste paper according to the flotation process and which consists of a polyester obtained through reaction between 1) polyalkylene glycol, 2) di- and/or tricarboxylic acid and/or anhydrides thereof and ...
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WO/1991/003596A1 |
The invention concerns the use of water-soluble or water-dispersible compounds containing polyalkylene oxide chains and nitrogen, prepared by reacting compounds of general formula (I), in which R is a z-valent alkoxy residue, AO is 1-100...
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WO/1991/003598A1 |
The invention relates to the use of at least partly water-soluble polymers with mean molecular weights between 2 000 and 500 000, prepared by reacting polymers containing carboxylic, ester and/or anhydride groups with amino alcohols and/...
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WO/1991/002839A1 |
The process comprises treatment of the pulp with an alkaline xylanase at pH values above 7.5 with subsequent treatment of the thus treated pulp with chlorine with a multiple for active chlorine of 0.20 or less in the first chlorination s...
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WO/1991/002840A1 |
An improved method for oxygen bleaching of pulp comprises treatment of the pulp with hemicellulose-hydrolyzing enzyme.
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WO/1991/002791A1 |
A method for bleaching of sulphate (kraft) pulp with decreased chemical dose and which comprises treatment of the pulp with low molecular weight xylanase having the following amino acid sequence: -Asn-Gln-Thr-Gly-Tyr-Asp-Gly-Met-Tyr-Ser-...
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WO/1991/001405A1 |
Waste paper is decomposed in the presence of alkoxylation products obtained by reacting alkylene oxides with C�10-22? carboxylic acid derivatives and/or C�10-22? carboxylic acids, which contain carboxylic acids with at least one OH g...
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WO/1990/014462A1 |
The fibers of recycled paper are cleaned by agitating the slurry containing the fibers to maintain the fibers in suspension, and contacting the slurry with wash water to remove ink and other contaminants. The apparatus includes a passage...
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WO/1990/011402A2 |
In a process for processing waste paper, aqueous suspensions of pulp are treated with cationic layer compounds precipitated in situ. The separated printing inks, fillers and/or unwanted substances are then removed from the fibrous suspen...
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WO/1990/010748A1 |
The present invention relates to a process for the manufacture of a cellulose-containing product, whereby the whole biomass from annual cellulose-producing plants, particularly cereals, is treated with alkali.
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WO/1990/010749A1 |
A method of de-inking waste paper materials consists in pulping the paper material in a hydropulper (1) to form a fibrous stock, and adding a substance in the form of a mixture of phosphated and carbonated sodium salts to the fibrous sto...
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WO/1990/008220A1 |
Description of a process for the flotation of fillers made of waste paper in the presence of organic phosphoric esters.
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WO/1990/008219A1 |
Description of a process for the flotation of fillers in the presence of tensides containing sulphonate groups.
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WO/1990/005805A2 |
Process for de-inking old papers in the presence of at least partly water-soluble polymers and/or copolymers with mean molecular weights between 2000 and 500 000 obtained by polymerization or by copolymerization of monomers containing am...
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WO/1990/005806A2 |
Process for de-inking old papers in the presence of at least partly water-soluble polymers and/or copolymers containing amino and/or ammonium groups.
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WO/1990/004674A1 |
Amphoteric surfactants are useful in flotation deinking of recycled waste paper especially that which has been subject to laser printing.
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WO/1989/012716A1 |
Process for producing pulp suitable as raw material for paper, board or fiberboards etc. A pumpable alkaline slurry of fibrous raw material is conducted through a pressurized tube system by the use of pulp pumps, the pressure increasing ...
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WO/1989/010999A1 |
The present invention relates to a method of removing ink from secondary fiber by contacting a pulp of said secondary fiber with an aqueous medium in the presence of a polymeric material having a glass transition temperature in the range...
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WO/1988/003190A1 |
A process and apparatus for transforming and/or extracting lignin or its decomposition products from lignin-cellulosic materials. For this purpose, a redox potential in the 200-500 mV range is set by adding oxidizing and/or reducing agen...
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WO/1987/006609A1 |
Lignocellulose is decomposed by a cell-free aqueous medium contacting an enzyme derived from an actinomycete bacterium e.g. Streptomyces cyaneus.
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WO/1987/005346A1 |
The bleaching chemicals (8) are added immediately after heating (4) of the fibers material which has been thickened by more than 20% by weight and immediately before a mixing process which is carried out in a high speed instantaneous mix...
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WO/1987/003023A1 |
Waste paper with a high lignin content is pretreated and delignified thereafter with oxygen (4). Prior to the oxygen step, the pulp (3) is dewatered whereby the main part of the white water (7) containing solved aluminium is used directl...
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WO/1987/000564A1 |
A novel enzymatic process for (a) bleaching kraft pulp, or (b) enhancing the strength properties and brightness stability of mechanical pulps, or (c) decolorization of E1 effluent. Specifically, novel enzymes, designated rLDMTM, and othe...
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WO/1987/000550A1 |
Novel lignin-degrading enzymes designated rLDMTM 1, rLDMTM 2, rLDMTM 3, rLDMTM 4, rLDMTM 5, and rLDMTM 6 are isolated and purified to the essentially pure form, wherein each rLDMTM is substantially free of other rLDMTM and native protein...
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WO/1987/000220A1 |
An arrangement for the separation by flocculation of flocculable substances contained in a suspension used particularly for purifying effluents from deinking installations where are processed used or waste paper, comprises a container (4...
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WO/1986/004585A1 |
For the flocculation of substances which can be flocculated, for example for cleaning the discharge water of deinking plant, flocculants are fed in at least at three different points between the discharge water container and a clarificat...
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WO/1986/002116A1 |
A liquid absorbing pad, in particular for use in hygiene articles and sanitary products, such as diapers, bed pads, sanitary napkins, pads for incontinence, panty shields, nursing pads or the like, is produced in a dry and direct process...
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WO/1986/001843A1 |
A method of obtaining cellulase deficient strains which have great ability to degrade lignin at the same time. The method comprises crossing a homokaryotic cellulase deficient mutant of a white-rot fungus having a full sexual cycle with ...
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WO/1985/004432A1 |
The aeration of dispersions, particularly the aeration of suspensions of fibre materials in a floating installation (1) is effected by means of a ring injector (2) to which air is supplied through air supply channels (11) up to the mixtu...
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WO/1985/004201A1 |
The hemicellulose content of a mixture of cellulose and hemicellulose is reduced by contacting the mixture with hemicellulase obtained by culturing the bacterium Saccharomonospora viridis in the abscence of a cellulase-producing organism.
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WO/1985/003960A1 |
In the course of a disinking operation, the floating of fibrous material suspensions is carried out in a cylindrical container (2) to which is fed by means of a connection (36) the fibrous material suspension as the primary flow. Said al...
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WO/1985/000402A1 |
Circulating and non-circulating well-drilling fluids comprising parenchymal cell cellulose. In accordance with a preferred embodiment, improved viscosity and fluid loss control in circulating well-drilling fluids are obtained from the in...
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WO/1984/000970A1 |
Artificial wood is manufactured from fruit kernels or nut shells by grinding the kernels or shells, sieving the ground material, mixing this with a polyester and/or other binding agents and feeding the result into moulds to provide a pro...
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WO/1982/002414A1 |
A silicon defoamer comprising silica or silicate made hydrophobic by treatment with a hydrophobic alcohol at a temperature above 100 C until the silica or silicate and the hydrophobic alcohol react, and the use of a defoaming composition...
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WO/1981/002030A1 |
Unbleached sulphate fibres are chemically separated from other fibres by the use of high molecular polyalkylene oxides, preferably polyethylene oxide. The polyalkylene oxides are added to aqueous suspensions of fibre mixtures and hereby ...
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