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WO/1993/007331A1 |
Deinking of printed paper is accomplished by repulping printed wastepaper in an aqueous medium containing a deinking chemical. The presence of the deinking chemical causes initial agglomeration of ink particles to produce an ink pulp med...
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WO/1993/007332A1 |
The present invention concerns a method for enzymatic treatment of lignocellulosic materials, in particular cellulose pulps. According to a method of this kind, the material is contacted with an enzyme preparation having hemicellulase, c...
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WO/1993/006295A1 |
The invention concerns a method of processing printed waste-paper, in particular waste-paper containing at least 80 % newspaper or magazine paper, by dissolving the paper, various cleaning stages, flotation or washing and subsequently pu...
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WO/1993/006184A1 |
A pressure sensitive adhesive composition is described which is water-dispersible under acidic conditions. The composition comprises a terpolymer of a hydrophobic monomeric acrylic or methacrylic ester of a non-tertiary alcohol (monomer ...
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WO/1993/004784A1 |
An apparatus (12) and method for deinking waste paper pulp using a foam flotation process to recycle printed waste paper for the manufacture of new paper. Pulped printed paper is fed as a slurry to an inlet (26) of a shallow tank (14). I...
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WO/1993/002967A1 |
A suspension which is preferably an ink-containing waste suspension recovered from a paper deinking process is flocculated by a cationic polymeric flocculant, and the flocculated material is then aggregated by an anionic colloidal materi...
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WO/1993/003155A1 |
A process for the production and use of a xylanase enzyme, having a high specific activity, of use in the treatment and/or biobleaching of chemical pulps is described. The enzyme provides for a more commercially feasible process for the ...
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WO/1993/002966A1 |
A suspension which is preferably an ink-containing waste suspension formed during a paper deinking process is flocculated by a cationic polymeric flocculant, and the flocculated material is then aggregated by an anionic colloidal materia...
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WO/1992/021813A1 |
A process for the production of a bleached lignocellulosic material is provided which comprises the biological treatment of a chemical pulp with xylanase, followed by a chlorination stage conducted with chlorine and chlorine dioxide. The...
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WO/1992/020857A1 |
The invention concerns a process for the removal of lignin from lignocellulose-containing material, the bleaching of lignocellulose-containing material (i.e. the enzymatic de-inking of recycled paper) and/or the treatment of waste water ...
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WO/1992/019808A1 |
Addition of a water-soluble polyelectrolyte (i.e. an anionic or cationic polymer) significantly increases the hydrolysis rate of esters in the presence of lipases. The invention provides a process for hydrolysis of water-insoluble ester ...
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WO/1992/018612A1 |
This invention relates to novel microorganisms and to novel enzymes. More specifically, the invention relates to a new species of the genus Dictyoglomus, and to novel enzymes having xylanolytic activity obtainable from the genus Dictyogl...
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WO/1992/018638A1 |
The invention provides a process for hydrolysis of water-insoluble ester in the presence of a lipase derived from a strain of $i(Humicola, Candida antarctica, Pseudomonas, Chromobacterium) or $i(Aspergillus) at pH 3-7, characterized by t...
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WO/1992/018688A1 |
A cellulase preparation with a high content of endoglucanase and little or no cellobiohydrolase may be used for the treatment of paper pulp, i.a. to improve the drainage properties of the pulp.
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WO/1992/017592A1 |
The present invention provides the cloning and expression of purified and isolated DNA molecules, obtainable from fungi, which encode enzymes having arabinan-degrading activity. The present invention also provides DNA constructs containi...
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WO/1992/017573A1 |
The xylanase is characterized by several partial amino acid sequences and is immunoreactive with an antibody raised against a purified xylanase derived from Humicola insolens, DSM 1800. This xylanase preparation is practically free of ce...
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WO/1992/017638A1 |
A process for removing printing ink from waste paper by disintegration of the waste paper mass, to which de-inking chemicals are added, followed if necessary by further processing steps that help to remove the printing ink, and by the di...
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WO/1992/016686A1 |
A method for reclaiming plastic from plastic waste material, including hydropulper or polymeric film and contaminants such as cellulosic fiber, adhesive labels, paper, dirt, or organic material. The plastic waste material is reduced in s...
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WO/1992/016687A1 |
The invention relates to a method for reducing the pitch trouble of mechanical pulp and/or papermaking pulp containing mechanical pulp by treating the pulp or white water with a cellulase/hemicellulase enzyme preparation.
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WO/1992/015751A1 |
Waste cellulosic material, for example corrugated paperboard is cooked in an aqueous alkaline cooking liquor (26) to produce a brownstock pulp having a kappa number lower than that of the waste material; combustion of organic materials (...
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WO/1992/013942A1 |
A xylanase has a molecular weight of approximately 22 kDA, an isoelectric point of approximately 7.7, is stable at 60 �C and has an optimal activity pH of between 4.8 and 7. Said xylanase is secreted by bacillus strains and can be puri...
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WO/1992/013131A1 |
A process for bleaching pulp by a combination of a microbial treatment and a treatment with a chlorine-free chemical. Pulp can be bleached at a high efficiency while completely preventing the generation of dioxin and the like when no chl...
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WO/1992/013130A1 |
More effective prevention of pitch troubles in a process for producing mechanical pulp or in a paper-making process using mechanical pulp. A paper-making process is conducted by addition of a fatty acid glyceride hydrolysing enzyme that ...
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WO/1992/010606A1 |
Method is disclosed of treatment of waste paper or the like at high temperatures in the range of 160 °C to about 230 °C. The furnish is treated in a digester with or without added chemicals but in the presence of saturated steam. The p...
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WO/1992/009741A1 |
The invention relates to a method for bleaching cellulosic pulp, said invention utilizing an oxidizing enzyme. The invention is characterized in that a transitional element metal such as manganese is utilized in the method, and when nece...
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WO/1992/008842A2 |
A process for delignifying and optionally bleaching nonwoody lignocellulosic substrates to produce a dietary fiber suitable for human consumption is disclosed. The process involves (a) an optional first step of treating the substrate wit...
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WO/1992/007996A1 |
A deinking agent comprising as an active ingredient an ester mixture prepared by reacting a natural fat or a reaction product between a natural fat and glycerol with a monohydric or dihydric alcohol in a ratio of 0.02/1 - 1/1 in terms of...
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WO/1992/007998A1 |
The invention relates to a method for bleaching cellulosic pulp, said invention being characterized in that the bleaching process proceeds stagewise from a pretreatment with oxygen subsequently followed by one or more treatments with hyd...
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WO/1992/008001A1 |
Proposed is a process for recovering, from waste sludge, raw materials usable in the manufacture of paper, cardboard and carton. After precipitation of the coarse particles, the sludge is centrifuged to remove black particles and then di...
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WO/1992/007995A1 |
A process for the treatment of absorbent sanitary paper products to separate such products into components thereof in a form suitable for recycling or re-use is disclosed; absorbent sanitary paper products include disposable diapers, inc...
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WO/1992/007997A1 |
A deinking agent comprising as an active ingredient an ester mixture prepared by reacting a natural fat or a reaction product between a natural fat and glycerol with a tetrahydric to dodecahydric alcohol in a ratio of 0.02/1 - 1/1 in ter...
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WO/1992/007137A1 |
A method of obtaining regenerated pulp superior in quality by pulping waste pressure-sensitive adhesive paper to which no treatment other than discarding has hitherto been applicable comprises such processes that: waste paper is disaggre...
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WO/1992/007138A1 |
Resin can be hydrolyzed enzymatically during the reductive bleaching (e.g. with sodium dithionite) commonly used in pulp manufacture. The enzyme treatment necessitates little or no change of commonly used bleaching conditions.
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WO/1992/006240A1 |
The invention concerns the use of polyether-chain-containing compounds produced by the reaction of epoxidised C¿10-22? carboxylic acid derivatives with polyalkylene glycols with average molecular weights between 100 and 2000 and/or cert...
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WO/1992/005309A1 |
A process for the continuous mass-production of chemical pulp from cellulosic material without adversely affecting the global environment and natural resources. The process comprises the step of digesting cellulosic material with a cooki...
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WO/1992/004501A1 |
The deposition of stickies on machinery used in the pulping and papermaking processes and in the final paper produced in the papermaking process using secondary or recycled paper is controlled by adding an amount of a water-soluble organ...
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WO/1992/003541A1 |
The invention concerns a process for hydrolyzing hemicelluloses, especially xylan, using an enzyme preparation isolated from Trichoderma reesei, containing an endo-beta-xylanase I (pI 5.5) and an endo-beta-xylanase II (pI 9.0). The inven...
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WO/1992/003608A1 |
A process for treatment of lignocellulosic pulp comprising a multistage washing of the unbleached kraft brown stock and a xylanase treatment. The xylanase treatment is carried out in a holding tank introduced upstream the first washing u...
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WO/1992/003540A1 |
This invention relates to novel enzymes possessing xylanolytic activity. More specifically, the invention relates to novel xylanases obtainable from strains of $i(Bacillus pumilus), a process for their preparation, and the use of these x...
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WO/1992/002148A1 |
A high yield process is provided for treating lignocellulose food fiber to sanitize and bleach the fiber. The process is not only a high yield process but produces better or equivalent bleaching than alternative processes and further doe...
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WO/1992/001109A1 |
Process for de-inking printed papers by soaking the papers in an aqueous medium in the presence of water-soluble or water-dispersible polymeric amphiphile compounds in which the hydrophilic and hydrophobic parts consist of condensed and/...
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WO/1991/018978A1 |
The invention relates to an enzyme preparation, to a process for the preparation thereof and to its use. The preparation according to the invention is produced by fermentation of the strain ATCC 21783 of the microorganism Bacillus circul...
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WO/1991/018090A1 |
Enzyme preparations enriched in hemicellulase-, pectin-, and/or lignin-degrading enzymes are described which are also partially or completely deficient in cellulase degrading activity. Such preparations may be utilized in a crude, umpuri...
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WO/1991/017243A1 |
A cellulase preparation consisting essentially of a homogeneous endoglucanase component which is immunoreactive with an antibody raised against a highly purified $m(k)43kD endoglucanase derived from $i(Humicola insolens), DSM 1800, or wh...
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WO/1991/017304A1 |
The invention relates to a method for separating plastic particles (P) from a suspension (L), e.g. from a cellulose mass or cellulose pulp suspension, in which the fiber-floc material is broken for loosening the plastic particles (P). In...
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WO/1991/015627A1 |
The invention relates to a process for the bleaching of a chemical pulp, process which comprises at minimum one bleaching step and at minimum one alkali treatment step, and in which the pulp is treated with an enzyme. It is essential in ...
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WO/1991/014820A1 |
Process for processing waste paper with enzymatic removal of printing ink, in which a) the redox potential of a solution containing waste paper is adjusted to a value in the range of 200 to 500 mV by simultaneous dosing of oxidizing and ...
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WO/1991/014823A1 |
The present invention concerns a process for the enzymatic bleaching of celluloses in which a) a redox potential in the range between 200 and 500 mV is set with the simultaneous dosed addition of oxidation and reducing agents and the add...
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WO/1991/014822A1 |
In the preparation of pulp for paper making, the drainage properties can be improved by treating the pulp with cellulase at high pulp consistency (above 8 %).
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WO/1991/014819A1 |
Good deinking of waste paper can be obtained at high consistency by first pulping at high pH, then lowering the pH, adding alkaline cellulase and letting the cellulase act during continued pulping and/or maceration. The improved deinking...
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