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WO/1998/002464A1 |
A method of producing cellulose carbamate is described in which: (a) cellulose is brought into contact with liquid ammonia at an initial pressure exceeding atmospheric pressure and a temperature of at least about 25 �C, in the presence...
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WO/1998/000589A1 |
The invention relates to a process for the preparation of a solution of N-methylmorpholin-N-oxide in water, which solution is used in the amine oxide process. The preparation process is characterised by the following steps: (a) an aqueou...
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WO/1997/047790A1 |
A simple method of preparing a homogeneous cellulose solution is disclosed, which comprises the steps of (a) preparing fibrillar cellulose powder; (b) injecting a molten liquid tertiary amine oxide solvent into a twin screw extruder; (c)...
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WO/1997/030090A1 |
The invention pertains to a process for preparing a material having a high water and salt solutions absorbency, said material containing mainly cellulose, in which process cellulose is dissolved in a solvent containing phosphoric acid, a...
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WO/1997/028298A1 |
The invention pertains to a process for preparing a spinnable, isotropic solution containing 94-100 wt.% of the constituents cellulose, phosphoric acid and/or its anhydrides, and water, which solution is obtained by dissolving cellulose ...
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WO/1997/023552A1 |
The invention relates to a cellulose sponge which can be made by mixing a cellulose solution in an aqueous tertiary amine oxide with a pore former and a foaming agent and then subjecting it to conditions resulting in a decomposition of t...
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WO/1997/011973A1 |
The invention relates to a thin-film treatment device with a cylindrical treatment vessel and a rotor fitted centrally therein and having agitators which are movable and are inclined at an angle 'alpha' to the rotor axis, in which the ro...
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WO/1997/011213A1 |
The invention concerns a method of manufacturing a cellulose product, in particular cellulose fibres, a cellulose-containing material being placed in an aqueous solution of a tertiary-amine oyide and brought into suspension, and water be...
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WO/1997/007688A1 |
A method for dry disruption of fibrous biomass, wherein the biomass through a pressure-tight inlet device is fed into one end of an oblong pressure vessel to be treated herein with an easily liquefiable gas or carbon dioxide under pressu...
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WO/1997/007137A1 |
The invention relates to a process for producing an aqueous amine oxide solution used in the amine oxide process for producing a mouldable cellulose solution, in which aqueous amine oxide-containing solutions occurring in the amine oxide...
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WO/1997/007138A1 |
The invention relates to a process for producing a solution of N-methyl morpholine-N-oxide in water, in which (a) an aqueous solution is used which contains N-methyl morpholine and morpholine and has a pH between 6.0 and 9.0, whereafter ...
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WO/1997/002292A1 |
A method for preparing a cellulose formate solution from cellulose slabs, particularly high-density slabs, without mechanically destroying said slabs in advance, is disclosed. The slabs are directly dissolved by impregnating the whole sl...
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WO/1996/038625A1 |
The invention relates to a process for crushing a cellulose material in which crushing takes place in at least two stages, where (1) the cellulose material is precrushed, whereby particles of various sizes are formed, (2) the particles p...
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WO/1996/033934A1 |
The invention concerns a device for holding and discharging homogeneous suspensions of comminuted cellulose in a liquid, aqueous tertiary amine oxide, the device comprising: a cylindrical, substantially horizontally mounted mixing vessel...
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WO/1996/033221A1 |
A process is disclosed for producing a cellulose suspension in a liquid, aqueous tertiary amine oxide by mixing crushed cellulose with liquid, aqueous tertiary amine oxide. The process is characterised in that (A) crushed cellulose is co...
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WO/1996/030410A1 |
Described is a method of producing solutions of cellulose in water-containing tertiary-amine-N-oxides by preparing a mixture containing cellulose, water and tertiary-amine-N-oxides and subsequently reducing the water content of the mixtu...
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WO/1996/030411A1 |
The invention concerns a process for activating polysaccharides, wherein the polysaccharide starting material is brought into contact with liquid ammonia at an initial pressure which is higher than atmospheric pressure and at a temperatu...
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WO/1996/024720A1 |
A microfibrillated cellulose containing at least around 80 % of primary walls and loaded with carboxylic acids, and a method for preparing same, in particular from sugar beet pulp, wherein the pulp is hydrolysed at a moderate temperature...
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WO/1996/021678A1 |
A method is described for forming a solution of cellulose in a tertiary amine oxide (such as N-methylmorpholine N-oxide) and a non-solvent for cellulose (such as water). The method involves the preparation of a mixture containing excess ...
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WO/1996/014451A1 |
The moulding, especially a fibre or foil, of cellulose regenerated by the amino-oxide process, is characterized in that the cellulose contains 0.02 to 30 % mass of a polyalkylene imine derivative. Besides the stabilisation of the mouldin...
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WO/1996/012761A1 |
The use together of (1) an aromatic compound containing a benzene ring bearing at least two substituents selected from the group consisting of hydroxy groups, primary amino groups and secondary amino groups and (2) a sulphur-containing c...
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WO/1996/009356A1 |
Liquid crystal solutions comprising cellulose dissolved in a solvent are disclosed. The solutions contain over 10 wt % of cellulose and are optically anisotropic at room temperature and at rest. The solvent contains over 85 wt % of at le...
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WO/1996/006207A1 |
The invention pertains to a process for making cellulose extrudates from an optically anisotropic solution containing 94-100 wt.% of the following constituents: cellulose, phosphoric acid and/or its anhydrides, and water, by extruding th...
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WO/1996/006208A1 |
Optically anisotropic solution containing cellulose and inorganic acids of phosphorus, with 94-100 wt.% of the solution being composed of cellulose, phosphoric acid and/or its anhydrides, and water. Preferably, inorganic acids of pentava...
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WO/1995/023885A1 |
The invention relates to a process for producing cellulose shaped bodies, said process comprising the following steps: (A) dissolving cellulose in an aqueous solution of a tertiary amino oxide to form a cellulose solution which can be sh...
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WO/1995/023827A1 |
The invention relates to a process for producing cellulose shaped bodies, said process comprising the following steps: (A) dissolving cellulose in an aqueous solution of a tertiary amino oxide, in particular N-methylmorpholine-N-oxide (N...
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WO/1995/016063A1 |
A process is disclosed for producing shaped cellulose bodies, in particular foils and fibres. A solution of cellulose in a tertiary amine oxide is extruded through a shaping device, for example a spinning nozzle, and the extruded shaped ...
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WO/1995/013419A1 |
Digester systems for producing paper pulp from comminuted cellulosic fibrous material take into account the level of dissolved organic materials (DOM), such as lignin, hemi-cellulose, and cellulose, maintaining the DOM level at about 100...
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WO/1995/011261A1 |
Proposed is method of preparing a plastic solution of cellulose in water containing a tertiary-amine oxide, the method being characterized in that: (a) comminuted cellulosic materials are introduced into an aqueous solution of a tertiary...
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WO/1995/008010A1 |
A moulding or spinning material containing cellulose, an aqueous tertiary amine oxide, a fixing agent and a stabiliser, in which there are one or more stabilisers which together have an antioxidant and basic effect, with the proviso that...
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WO/1994/028213A1 |
A method for transporting a solution of cellulose in aqueous N-methylmorpholine N-oxide through a pipe, the temperature in degrees centrigrade of said solution in the centre of said pipe being controlled at 1000/(X + 0.19 x D) and/or the...
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WO/1994/028217A1 |
A method is disclosed of forming a premix which is suitable for conversion into a cellulosic dope which can be used to produce cellulosic products. The method involves introducing into a mixing chamber predetermined quantities of shredde...
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WO/1994/025668A1 |
Kraft pulp of increased strength and bleachability may be produced with decreased consumption of effective alkali, and at a lower H factor, by keeping the dissolved organic material (DOM) concentration low substantially through the entir...
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WO/1994/025492A1 |
The invention concerns a stable moulding or spinning compound containing cellulose, a tertiary amine oxide, in particular N-methylmorpholin-N-oxide and optionally water, plus a stabilizer. The compound is characterized in that a mixture ...
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WO/1994/019405A1 |
A cellulose molding solution excellent in flow and moldability and suitable for producing moldings such as fiber or film, which solution is prepared by mixing a component [I] comprising a cellulose having a degree of polymerization of 50...
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WO/1994/006530A1 |
A solution of cellulose is formed by moving a premix of a tertiary amine N-oxide, water and cellulose through a thin-film evaporator using a bladed rotor under treatment conditions which specify, an area of heated surface (1m2 to 1252), ...
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WO/1993/025584A1 |
Disclosed is a process comprising: A) introducing cellulose and water into an activation zone; B) introducing acetic acid and sulfuric acid into the activation zone; and C) subjecting the cellulose, water, acetic acid and a catalyst to a...
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WO1993025584A2 |
Disclosed is a process comprising: A) introducing cellulose and water into an activation zone; B) introducing acetic acid and sulfuric acid into the activation zone; and C) subjecting the cellulose, water, acetic acid and a catalyst to a...
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WO/1993/010158A1 |
A method of producing a gel material and which comprises firstly providing an aqueous soluble hemicellulosic starting medium which is free of glucans and obtainable from testaceous plant material. The starting medium is then extracted wi...
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WO/1993/010157A1 |
Two cereal extracts are produced by means of a process comprising the steps of milling cereal material, suspending the milled material in an aqueous liquid, treating the suspension with an alkali, acidifying and separating the solid and ...
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WO/1991/013099A1 |
An improved biomass refining process is disclosed which is considerably more efficient and cost effective than conventional refining processes. The apparatus and method of the present invention employs superheated steam to dry the solid ...
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WO/1990/008221A1 |
The present invention solves the problem of delignifying technical cellulose pulp in a selective manner which will result in very low residual contents of lignin in the pulp and a correspondingly high quantity of lignin dissolved in spen...
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WO/1988/002758A1 |
A method for modification of alginates or other uronic acid containing compounds to give improved physical properties, wherein the alginates in solid form are treated with CO2 at near-supercritical or supercritical conditions. The method...
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WO/1988/000952A1 |
A method for utilizing a purified exocellular polysaccharide, Zooglan, produced by Zoogloea ramigera, as a viscosity modifier, gellant, drag reducing agent, dispersant, flocculant, or emulsifying agent, wherein the properties of the poly...
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WO/1988/000055A1 |
Water-soluble macromolecular conjugate of hemoglobin, characterised in that it is comprised of, on the one hand, hemoglobin, and on the other hand a water-soluble polymer P comprising polar groups which macromolecular conjugate has sites...
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WO/1987/007898A1 |
Method of crosslinking carboxyl-containing polysaccharides in that the polysaccharide is at first activated with a bi- or polyfunctional reagent, and then after removal of any potential excess of activating reagent the crosslinking is pe...
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WO/1987/007618A1 |
Heterogeneous acid decrystallization of aminopolysaccharides, especially chitosan, using diluent, organic acid and water, provides novel salts and covalent derivatives useful in diverse applications including biomedicine, personal care a...
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WO/1987/006461A1 |
Cosmetic products for treating hair or skin, characterized by a content of new N-hydroxybutyl-chitosans or their salts, consisting of a) 4 to 40 moles % of monomer units of formula (I), and b) 60 to 96 moles % of monomer units of formula...
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WO/1987/005939A1 |
Variant xanthan gums, including non-acetylated, non-pyruvylated, non-acetylated and non-pyruvylated, and fully-acetylated xanthan gums and other gums which are structurally-related to xanthan gum such as acetylated polytetramer and non-a...
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WO/1987/002679A1 |
A composition comprising particles of inulin or an inulin derivative in the gamma polymorphic form is characterised in that the particles have a low rate of solution in aqueous media above 30oC, particularly above 37oC. The composition i...
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