Class 536/61 - Subsequent treatment process

Subclass of Class 536 - Organic compounds -- part of the class 532-570 series
Definition: Compounds in which cellulose xanthate or viscose is purified,
No. of patents: 33
Last issue date: 12/12/2006

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Number	Title	Issue Date
7148344	Method for producing cellulose acetate film Using the dope containing the following cellulose acetate (1), (2), or (3), a film is prepared by the casting process: (1) a cellulose acetate having carboxyl groups binding to at least one member selected from the group consisting...	12/12/2006
7045057	Preparation of homogeneously loaded ion exchangers A process for preparing an ion-exchangeable media within a moving-bed or simulated moving-bed device, which can create a true or simulated media flow, comprising the steps of packing the bed with ion-exchangeable media and passing a solution, containing a mixture of...	05/16/2006
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
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
5684141	Aminated cellulosic synthetic fibers Aminated cellulosic synthetic fibers are produced by adding an amine-substituted cellulose derivative to a viscose or an alkali cellulose and spinning fibers by the viscose spinning process, or by adding said cellulose derivative to a cellulose solution a...	11/04/1997
5324823	Adsorbent for cellular fibronectin and a method for fractional purification of fibronectin The invention provides a selective adsorbent for cellular fibronectin (cFN) and a method for fractional purification of FN which includes contacting an FN material containing plasma fibronectin (pFN) and cFN with a crosslinked polysaccharide sulfate and/o...	06/28/1994
5108596	Borous ion-exchanged fine cellulose particles, method for production thereof, and affinity carrier This invention relates to ion-exchanged fine cellulose particles, porous fine cellulose particles which can be advantageously used as an affinity carrier, and methods of production thereof. These fine particles of the invention have the advantage that the...	04/28/1992
5091520	Finely particulate cellulose esters of aromatic or aromatic-aliphatic carboxylic acids, process for their preparation, and the use thereof Finely particulate cellulose esters of aromatic or aromatic-aliphatic carboxylic acids in the form of substantially spherical, partially crystalline particles having an average diameter of 1 to 200 μm and a specific surface area of 10 to 300 m2	02/25/1992
4997935	Modified cellulose for biocompatible dialysis membranes III and process for preparation thereof A modified cellulose for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R'...	03/05/1991
4981960	Modified cellulose for biocompatible dialysis membranes IV and process for preparation thereof A modified cellulose for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein Cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R'...	01/01/1991
4981959	Modified cellulose for biocompatible dialysis membranes II and process for preparation thereof A modified cellulose for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is unmodified cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of...	01/01/1991
4946953	Fine cellulose particles and process for production thereof employing coagulated viscose Fine crosslinked cellulose particles, wherein (1) said cellulose particles are composed substantially of a II-type cellulose crystalline phase and a non-crystalline cellulose phase, (2) said cellulose particles have a crystallinity, determined by X-ray di...	08/07/1990
4918180	Preparation of cellulose ethers A process for reducing the dust content of cellulose ethers comprises reacting the cellulose ether with an aggregating agent comprising (1) a polypropylene glycol or a propoxylated alcohol and (2) an ethylene oxide/propylene oxide copolymer....	04/17/1990
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
4814437	Method for preparation of sulfated polysaccharides by treating the polysaccharide with a reducing agent before sulfation A new method for preparation of sulfated polysaccharides by means of pyridine-chlorosulfonic acid reagents. The polysaccharide is before sulfation treated with a reducing agent, e.g. sodium borohydride....	03/21/1989
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
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
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
4364889	Process for preparing a cotton-like rayon fiber An improved viscose rayon fiber is disclosed having a degree of polymerization of greater than about 500 and an alkali solubility of below about 7.5%, the fiber also exhibits a tenacity of about 5-6 grams per denier and a conditional elongation of between...	12/21/1982
4343920	Polymeric polydentate complexons and a method for their preparation The invention pertains to polymeric polydentate complexons (i.e. chelating agents) of general formulae I and II ##STR1## where P is a linear or three-dimensional polymeric skeleton and X is --0-- or ##STR2## while R is H, C1 -C...	08/10/1982
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
4294731	Method for drying absorbent modified cellulosic polymers and the like A method for oven drying chemically modified cellulosic materials, especially fibers, having improved fluid absorbency involves incorporating into the cellulose structure while swollen an amphiphilic compound miscible with water which will not evaporate w...	10/13/1981
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
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
4260739	Process and apparatus for preparing a homogeneous solution of xanthated alkali cellulose Process and apparatus for treating xanthated alkali cellulose solution so as to form a homogeneous solution by continuously passing a xanthated alkali cellulose solution through a series of attrition and mixing stages and partially diluting the solution i...	04/07/1981
4243776	Preparation of non-thrombogenic polymeric material article with platelet anti-aggregative agent Biocompatible articles are obtained by treating a polymeric material with a hydrolyzing agent on its surface and covalently binding thereon a biological agent, such as an anti-platelet-aggregation agent....	01/06/1981
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
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
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
3935022	Method for the removal of hemicellulose from hemicellulose-containing caustic liquors Hemicellulose is removed from hemicellulose containing caustic solutions by adding thereto a sufficient amount of ethanol to precipitate the hemicellulose. The caustic solutions are generally obtained in the manufacture of viscose products or, more broadl...	01/27/1976

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Class 536/61 - Subsequent treatment process