Class 536/60 - Xanthate or viscose

Subclass of Class 536 - Organic compounds -- part of the class 532-570 series
Definition: Compounds which are cellulose derivatives that include the
No. of patents: 37
Last issue date: 08/30/2005

Number	Title	Issue Date
6936136	Amino-functionalized pulp fibers The disclosed invention is directed to pulp fibers suitable for forming a wet-laid paper product which include amino-functionality which is non-extractable in an aqueous phase. The pulp fibers may be prepared by applying an amino-functional additive to a fibrous web...	08/30/2005
6538130	Manufacture of viscose and of articles therefrom In the manufacture of viscose, and an elongate cellulose member such as standard viscose rayon fibre, with reduced alkali ratio from dissolving-grade cellulose such as wood pulp by irradiation with a high energy beam at a dose of 1-30 kGy, steeping in aqu...	03/25/2003
6515121	Method of manufacturing and collecting cellulosic particles Cellulosic fibrids can be made by mixing together under turbulent conditions viscose and a coagulating and regenerating liquor containing preformed fibrids to form a suspension of fibrids in a spent liquor, and collecting the fibrids from the spent liquor...	02/04/2003
6475419	Auxiliary agent for the production of cellulose fibers Methods of preparing cellulose materials, which methods comprise (a) reacting a cellulosic material with a first basic component to form alkli cellulose; (b) reacting the alkali cellulose with carbon disulfide and a second basic component to form a cellul...	11/05/2002
6392033	Method for viscose production A process for producing viscose wherein the caustic soda used previously in the alkalization of electron-untreated cellulose can be used in the alkalization of electron-treated cellulosic material, provided the level of dispersed solids in the caustic sod...	05/21/2002
6262299	Zwitterionic monomer having amino-multicarboxylic acid functionality A zwitterionic monomer having amino-multicarboxylic acid functionality having Structure (I) ##STR1## wherein R1 is selected from the group consisting of H, an alkyl group having 1 to 6 carbon atoms; R2 is (CH2)n...	07/17/2001
6045587	Method of reducing color and polymerization decay of cellulose viscose A method of reducing color and polymerization decay of cellulose viscose includes the step of permeating a 1,3-phenylene-bis 2-oxazoline as a polymerization anti-decay additive during dissolving a cellulose in water and a solvent to form a cellulose visco...	04/04/2000
5880278	Composition containing cellulose formate, capable of forming an elastic, thermoreversible gel A composition containing cellulose formate and a solvent system. At a temperature at least equal to a value Tf the composition is a solution, and at a temperature appreciably less than Tf the composition is an elastic, thermoreversib...	03/09/1999
5454973	Stable dispersible mineral acid slurry of benzidine derivatives Mineral acid slurries of benzidine derivatives having high stability are provided by incorporating into such slurries a polysaccharide....	10/03/1995
5358679	Manufacture of regenerated cellulosic fiber by zinc free viscose process A process for the production of rayon fibers. The viscose solution is spun into a spinbath which is acidic in character but has no zinc salt like conventional baths. The spin bath contains sulphuric acid, aluminum sulphate and sodium sulphate. The spinnin...	10/25/1994
5032682	Silated polysaccharides Silated polysaccharides having 0.005 to 2.0 silyl molar substitution per anhydrosaccharide unit form water resistant films when cast from aqueous solution and dried in the presence of atmospheric carbon dioxide. These films are soluble in aqueous caustic....	07/16/1991
4959466	Partially esterified polysaccharide (PEP) fat substitutes Partially esterified oligosaccharides and polysaccharides (PEPs) of the formula [P--O--R)x ]n, where P is a polysaccharide having n=3-50 (preferably 3-10) C4 -C8 saccharide units, y is 0-4 (preferably 1 or 2), R...	09/25/1990
4904258	Biocompatible, hydrophilic material, method of manufacture and uses of same A biocompatible hydrophilic material is based on purified cellulose, from which material all or the majority of the water has been removed and which has a modulable potential for water recovery of up to an amount of water of approximately 60%. The materia...	02/27/1990
4902792	Fine cellulose particles and process for production thereof A process for producing fine cellulose particles, which comprises (1) mixing viscose with a water-soluble anionic polymeric compound or polyethylene glycol or its derivative to form a dispersion of fine particles of viscose, (2) (i) heating the dispersion or m...	02/20/1990
4703117	Process for isolating microbial polysaccharides from their fatty amine adducts Microbial polysaccharides can be liberated from their fatty amine adducts by treating these adducts in the presence of an alcohol with a salt of ammonia or of a highly volatile amine which is soluble in this alcohol or thermally readily dissociated. It is...	10/27/1987
4443596	Viscose rayon filment yarn and process for producing same A viscose rayon filament yarn excellent in resistance to deterioration with time and uniform in boiling water shrinkage factor in the longitudinal direction of yarn which has been produced by a continuous spinning process characterized by spinning out a v...	04/17/1984
4410693	Process for preparing cellulose derivatives Cellulose derivatives having a controlled molecular weight are prepared by adjusting oxygen concentration as measured by analyzing the quantity of oxygen in the head space of the reaction vessel to a level such that the cellulose derivative prepared there...	10/18/1983
4409384	Viscose preparation using low concentration caustic A process for the production of an acceptably filterable viscose from cellulose whereby cellulose is treated with an aqueous solution containing 13 to 16 weight percent NaOH, peroxide aged, xanthated and dissolved in dilute aqueous NaOH....	10/11/1983
4405324	Absorbent cellulosic structures Absorbent, coherent, flexible structures in the form of fibrous webs and porous sponges comprising cellulose derivatives having a DS of between about 0.05 and about 0.35 whereby upon application to the body and wet with aqueous body liquids, the protrudin...	09/20/1983
4373098	Process for converting cellulose directly into alkali cellulose A direct process for converting cellulose into alkali cellulose for subsequent production of a filterable viscose by combining particles of cellulose with the largest 1% of the particles having a minimum size Y of less than 600 microns and the bulk densit...	02/08/1983
4368078	Process for the preparation of viscose and process for the spinning of the viscose thus obtained A process for the xanthation of alkali-cellulose comprises the reaction of he alkali-cellulose with CS2 in excess with respect to the desired xanthate substitution degree at a pressure which increases from the initial 110 mm Hg to about 400-500 ...	01/11/1983
4342600	Process for the manufacture of viscoses The invention provides a process for the manufacture of viscoses from hemicellulose-containing cellulose pulps without requiring dialysis equipment. By addition of substances having a cross-linking or blocking action on the active groups of hemicellulose ...	08/03/1982
4340429	Process for improving the filterability of viscoses The invention provides a process for improving the solution state (filterability) of viscoses, wherein mashing of the alkali cellulose-xanthate with dilute sodium hydroxide solution or water and/or dissolving of the xanthate by agitation, disintegration o...	07/20/1982
4289875	Process for continuous filtration and aging of xanthated alkali cellulose A process for the continuous filtration and aging of a viscose solution comprising xanthated alkali cellulose (XAC) is described wherein the XAC is continuously passed in a downstream direction through a series of aging tanks and a series of filter means....	09/15/1981
4287334	Process for manufacturing viscose Process for manufacturing viscose solutions having good filterability and producing low amounts of sulfide gases during subsequent spinning; said process comprising treating cellulose with a first alkali metal hydroxide solution in a first alkalization st...	09/01/1981
4284765	Automatic aging analyzer using a motor having a constant torque This invention relates to a process and apparatus for the manufacture of viscose products which includes a motor means having a constant torque in the viscose during ripening wherein the resistance on said motor means changes as the viscose ripens because...	08/18/1981
4270914	Process for controlling hemicellulose concentration during the mercerization of cellulose The disadvantages stemming from a high content of hemicellulose in recirculated sodium hydroxide solutions used for the mercerization of cellulose in the preparation of viscose are reduced or eliminated by subjecting at least a part of the spent sodium hy...	06/02/1981
4215212	Regenerated cellulose containing cross linked sodium lignate or sodium lignosulfonate Regenerated cellulose products containing formaldehyde cross linked sodium lignate or sodium lignosulfonate in an amount of from about 1% to about 40% by weight based on the weight of the cellulose in the product are prepared by mixing one of the cross li...	07/29/1980
4210747	Process for the preparation of viscose A process for the preparation of viscose by adding to cellulose pulp, manufactured by alkali cooking without prehydrolysis or by acid cooking without alkali extraction, steeping lye and an organic compound, steeping the pulp to form alkali cellulose, agin...	07/01/1980
4158698	Apparatus for continuous xanthation and production of viscose spinning solution A continuous feed of alkali cellulose (AKC) is partially xanthated, and then dissolved and further xanthated to form a viscose solution, while passing continuously through a series of connected reactors and slurry vessels, wherein slurries of carbon disul...	06/19/1979
4145533	Method for recycling regenerated cellulose scrap A method for recycling regenerated cellulose scrap such as uncoated cellophane and rayon produced in the viscose process. The regenerated cellulose scrap is first shredded into relatively small flakes and then emulsion-xanthated at a temperature ranging f...	03/20/1979
4136255	Process for making solutions of cellulosic compounds A solution of cellulose or cellulose derivative suitable for spinning, extruding or other shaping process is prepared by steeping unaged cellulose or a cellulosic derivative a plurality of times, consecutively, subsequently shredding and then aging prior ...	01/23/1979
4098996	Regenerated cellulose film recovery process Waste raw uncoated and/or coated (such as saran, nitrocellulose and vinyl) regenerated cellulose film is treated to recover its plasticizer and cellulose components for recycling in the manufacture of regenerated cellulose film. The platicizer is first re...	07/04/1978
4081593	Process for producing phosphazene fire retardant A process for producing fire retardant phosphonitrilate polymers by reacting phosphonitrilic halide with a hydroxyl compound such as an aliphatic or aromatic alcohol at not more than about 40° C in the presence of an acid acceptor, such as pyridine, unde...	03/28/1978
4076934	Method for controlling oxygen level during continuous xanthation of alkali cellulose The amount of oxygen present during the continuous xanthation of alkali cellulose with carbon disulfide is narrowly controlled by continuously purging the alkali cellulose with nitrogen prior to entry of the alkali cellulose into the xanthator. Preferably...	02/28/1978
4075028	Composition for treating cellulose-containing fibrous materials and method of producing composition for treating cellulose-containing materials The composition proposed in the present invention is a cellulose gel consisting of no less than 13 wt.% of hemicelluloses in an aqueous solution of a compound selected from the group consisting of carbamide, thiocarbamide, alkyl-substituted thiocarbamide ...	02/21/1978
4037039	Process for continuous xanthation and production of viscose spinning solution A continuous feed of alkali cellulose (AKC) is partially xanthated, and then dissolved and further xanthated to form a viscose solution, while passing continuously through a series of connected reactors and slurry vessels, wherein slurries of carbon disul...	07/19/1977

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Class 536/60 - Xanthate or viscose