Class 536/89 - Acid employed in subsequent treatment

Subclass of Class 536 - Organic compounds -- part of the class 532-570 series
Definition: Processes wherein an organic acid or an inorganic acid is
No. of patents: 30
Last issue date: 01/23/2007

Number	Title	Issue Date
7166290	Methods for producing oocysts The present invention provides improved methods and compositions for producing oocysts. The oocysts produced according to the invention find use in the manufacture of vaccines. In preferred embodiments, the present invention provides methods and compositions for the...	01/23/2007
7098327	Dual-functional ion exchange resins from agricultural by-products A process for the production of dual-functional ion exchange resins from lignocellulosic agricultural material involving anionization of the lignocellulosic agricultural material with citric acid and then cationization of the lignocellulosic agricultural material wi...	08/29/2006
7022837	Cellulose ethers and method of preparing the same The present inventors have discovered that the solution rheology of cellulose ethers prepared from cellulose pulp is altered by mercerizing and recovering cellulose pulp before preparing the cellulose ethers. For example, the solution viscosity of carboxymethyl cell...	04/04/2006
7009046	Low-substituted hydroxypropyl cellulose and agent serving both as binder and disintegrant for dry direct compression Provided is an agent serving as a binder and a disintegrant for dry direct compression having a high binding property and fluidity. More specifically, provided are low-substituted hydroxypropyl cellulose having coiled fibers; an agent serving both as a binder and a ...	03/07/2006
6958394	Cellulose ester film A cellulose ester film is disclosed which comprises a polyhydric alcohol ester, which is an ester of one or more kinds of monocarboxylic acids with an aliphatic polyhydric alcohol, wherein the cellulose ester film has a water vapor transmission rate of from 20 to 26...	10/25/2005
6896725	Aldehyde-containing polymers as wet strength additives The invention concerns the use of a water-soluble or water-dispersible polymer having a molecular weight of at least 800, containing at least 5 aldehyde groups per molecule and at least 1 carboxyl group per molecule, the ratio of aldehyde groups to carboxyl groups b...	05/24/2005
6849729	Low-substituted cellulose ether powder and production process thereof Provided is a cellulose polymer having a water retention property, and good feeling upon use when applied to the skin and being suitably used as a carrier. More specifically, provided is a low-substituted cellulose ether powder comprising primary particles wherein a...	02/01/2005
6610669	Water insoluble derivatives of polyanionic polysaccharides A water insoluble, biocompatible gel is prepared by reacting carboxymethylcellulose and a carbodiimide, wherein the reaction is conducted in an aqueous medium containing a water miscible organic solvent, such as a lower alkanol, an alkyl pyrrolidone, DMSO...	08/26/2003
6590092	Process for preparing a "universal support" and the reagents used for generating such support Universal solid supports suitable for use synthesizing of oligonucleotides. The solid supports may be used irrespective of the first RNA or DNA nucleotide to be synthesized, and irrespective of the type of monomer reagent used during the synthesis, that i...	07/08/2003
6525192	Low-substituted hydroxypropyl cellulose and process for producing same The present invention provides a low-substituted hydroxypropyl cellulose having a loose bulk density of not less than 0.40 g/mL and a tap bulk density of not less than 0.60 g/mL and a process for producing the same....	02/25/2003
6294008	Haze-free cellulose ether capsules and process for making Disclosed is a cellulose ether composition having a low molecular weight cellulose ether of a viscosity of about 200 centipoise or less in a two percent aqueous solution at 20° C. The composition has a sodium chloride content of about 0.3 weight percent ...	09/25/2001
6046306	PNA synthesis using an amino protecting group which is labile to weak acids PNA synthesis using an amino protective group which is labile to weak acids....	04/04/2000
6030958	Water insoluble derivatives of hyaluronic acid A water insoluble, biocompatible composition that includes the reaction product of a polyanionic polysaccharide and an activating agent....	02/29/2000
5776501	Coating base for solid enteric pharmaceutical preparations The present invention provides a base for coating a solid enteric pharmaceutical preparation whose dissolution pH ranges from 3 to 4. The coating base is a cellulose acetate maleate which is prepared by substituting a water-soluble cellulose derivative wi...	07/07/1998
5324717	Therapeutical composition comprising hydrolyzed carboxylalkyl cellulose A therapeutical composition comprising hydrolyzed carboxyalkyl cellulose, wherein alkyl is methyl, ethyl or propyl, optionally in salt form, which hydrolyzed carboxyalkyl cellulose has a mass average molecular mass from about 200 to about 10,000. A method...	06/28/1994
5008385	Cellulose derivatives and fibers and membranes made therefrom Cellulose derivatives are disclosed which have the following formula: ##STR1## wherein Z is selected from the group consisting of alkylene, alkenylene, alkynylene, cycloalkylene or benzylene or xylylene radicals, which may or may not be substituted; ...	04/16/1991
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
4697008	Production of water-insoluble alkali metal salts of carboxyalkyl cellulose A method of producing a water-insoluble alkali metal salt of carboxyalkyl cellulose such as CMC is disclosed. The method comprises reacting a water-soluble alkali metal salt of carboxyalkyl cellulose with an aliphatic hydroxycarboxylic acid....	09/29/1987
4634438	pH-regulating Cellulose products Hygienic products of various types, all comprising as their operative body contact portion a fiber mass of acidic, modified, pH-regulating, cellulose....	01/06/1987
4634439	pH-regulating Cellulose fiber A cellulose fiber which is carboxyalkylated in free acid form, a fiber mass formed therefrom, and a method for producing such fiber....	01/06/1987
4537958	Process for preparing cellulose ethers Non-gelling cellulose ethers are purified by mixing same with a dialdehyde under acidic conditions and under high agitation, forming a slurry of the treated cellulose ether, rapidly transferring the slurry to a filter and then dewatering said slurry....	08/27/1985
4508894	Acid-type carboxymethyl cellulose and process for preparing the same The present invention provides a novel water-soluble acid-type carboxymethyl cellulose characterized by: (a) having a total degree of substitution "x" by carboxymethyl group of 0.42 to 3.00 per anhydrous glucose unit, the degree of substitution "y" by aci...	04/02/1985
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
4249000	Modified polymers Polymers from the group consisting of cellulose and its ester and ether derivatives, of polyvinyl alcohol and its ester derivatives, polymers with vinyl esters and homopolymers and copolymers of acrylates and methacrylates are modified with monofunctional...	02/03/1981
4229572	Purification of cellulose ether reaction product In the preparation of organosoluble cellulose ethers, the content of alkali metal (hydroxides and the salts thereof) in the resulting cellulose ether is reduced by forming a solution of the cellulose ether and an organic solvent, converting the alkali met...	10/21/1980
4166891	Visual-type hygrometer A composition of matter for use in a visual-type instrument which includes a polarizer for a light beam and an analyzer for a light beam, the chemical composition being birefringent at a first relative humidity and nonbirefringent at a second relative hum...	09/04/1979
4107426	Process for treating cellulose A water-repellent cellulose and articles comprising the water-repellent cellulose are disclosed together with a process and apparatus for preparing the same. The water-repellent cellulose is prepared by exposing one or more sides and edges of a cellulose ...	08/15/1978
4068068	Process for the manufacture of water-absorbing cellulose ethers This invention relates to an improvement in the process for the manufacture of water-adsorbing but at least partially water-insoluble cellulose ethers in which cellulose is alkalized in a liquid reaction medium and reacted with an etherification agent in ...	01/10/1978
3936441	Process for the production of water adsorbing but water-insoluble cellulose ethers This invention relates to an improvement in the process for the production of water-adsorbing, but largely water-insoluble, cellulose ethers, in which cellulose is alkalized in the presence of alkali hydroxide and isopropanol as a reaction medium and is s...	02/03/1976

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Class 536/89 - Acid employed in subsequent treatment