IPC 6 English version C08B-C08B 37/18

C08-C08B03718

SECTION C– CHEMISTRY; METALLURGY

C 08

ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON (manufacture or treatment of artificial threads, fibres, bristles or ribbons D 01)

C 08 B

POLYSACCHARIDES; DERIVATIVES THEREOF (polysaccharides containing less than six saccharide radicals attached to each other by glycosidic linkages C 07 H; fermentation or enzyme-using processes C 12 P 19/00; sugar industry C 13; production of cellulose D 21) [4]

Preparation

Preparatory treatment of cellulose for making derivatives thereof

Rendering cellulose suitable for esterification

for the preparation of cellulose nitrate

Rendering cellulose suitable for etherification

Alkali cellulose

Apparatus for the preparation of alkali cellulose

Steeping devices

Ripening devices

Preparation of cellulose esters of organic acids

Catalysts used for the esterification

Cellulose formate

Cellulose acetate

of monobasic organic acids with three or more carbon atoms

with five or more carbon atoms

of polybasic organic acids

in which the organic acid residue contains substituents, e.g. NH₂, Cl

Preparation of mixed organic cellulose esters

Aceto-butyrates

Esterification with maintenance of the fibrous structure of the cellulose (surface esterification of textiles D 06 M 13/00)

Post-esterification treatments, including purification

Hydrolysis or ripening

Isolation of the cellulose ester

by precipitation

Stabilisation (by addition of stabilisers C 08 K)

Preparation of cellulose esters of inorganic acids

Cellulose nitrate

Post-esterification treatments, including purification

Isolation of the cellulose nitrate

Stabilisation (by addition of stabilisers C 08 K)

Reducing the viscosity

Replacing the water by organic liquids

Cellulose sulfate

Preparation of cellulose esters of both organic and inorganic acids

Cellulose xanthate; Viscose

Sulfidisers; Dissolvers

Continuous processes

Single-stage processes

11/

Preparation of cellulose ethers

11/

Alkyl or cycloalkyl ethers

11/

with substituted hydrocarbon radicals

11/

with halogen-substituted hydrocarbon radicals

11/

with hydroxylated hydrocarbon radicals; Esters, ethers, or acetals thereof

11/

substituted with acid radicals

11/

substituted with carboxylic radicals

11/

with nitrogen-containing groups

11/

145

with basic nitrogen, e.g. aminoalkyl ethers [2]

11/

with carbamoyl groups [2]

11/

155

with cyano groups, e.g. cyanoalkyl ethers [2]

11/

Aryl or aralkyl ethers

11/

with substituted hydrocarbon radicals

11/

187

with olefinic unsaturated groups [2]

11/

193

Mixed ethers, i.e. ethers with two or more different etherifying groups [2]

11/

Post-etherification treatments, including purification

11/

Isolation

13/

Preparation of cellulose ether-esters

13/

Cellulose ether xanthates

15/

Preparation of other cellulose derivatives or modified cellulose

15/

Oxycellulose; Hydrocellulose; Cellulose hydrate

15/

Carboxycellulose, e.g. prepared by oxidation with nitrogen dioxide

15/

Derivatives containing elements other than carbon, hydrogen, oxygen, halogen, or sulfur (esters of phosphorus acids C 08 B 5/00) [2]

15/

containing nitrogen [2]

15/

Fractionation of cellulose, e.g. separation of cellulose crystallites [2]

15/

Crosslinking of cellulose [2]

16/

Regeneration of cellulose [2]

17/

Apparatus for esterification or etherification of cellulose

17/

for making organic esters of cellulose

17/

for making cellulose nitrate

17/

for making cellulose ethers

30/

Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin [4]

30/

Preparatory treatment, e.g. crushing of raw materials (machines for preliminary washing A 23 N) [4]

30/

Extraction or purification [4]

30/

Drying; Forming [4]

30/

Concentration of starch suspensions [4]

30/

Working-up residues from the starch extraction, including pressing water from the starch-extracted material [4]

30/

Degraded or non-chemically modified starch; Bleaching of starch (preparation of chemical derivatives of starch C 08 B 31/00) [4]

30/

Cold water dispersible or pregelatinised starch [4]

30/

Apparatus therefor [4]

30/

Dextrin [4]

30/

Amylose or amylopectin (chemical derivatives thereof C 08 B 33/00, C 08 B 35/00) [4]

31/

Preparation of chemical derivatives of starch (chemical derivatives of amylose C 08 B 33/00; chemical derivatives of amylopectin C 08 B 35/00) [2]

31/

Esters [2]

31/

of organic acids [2]

31/

of inorganic acids [2]

31/

Ethers [2]

31/

Alkyl or cycloalkyl ethers [2]

31/

having alkyl or cycloalkyl radicals substituted by hetero atoms [2]

31/

Aryl or aralkyl ethers [2]

31/

Ether-esters [2]

31/

Oxidised starch [2]

33/

Preparation of chemical derivatives of amylose [2]

33/

Esters [2]

33/

Ethers [2]

33/

Ether-esters [2]

33/

Oxidised amylose [2]

35/

Preparation of chemical derivatives of amylopectin [2]

35/

Esters [2]

35/

Ethers [2]

35/

Ether-esters [2]

35/

Oxidised amylopectin [2]

37/

Preparation of polysaccharides not provided for in groups C 08 B 1/00 to C 08 B 35/00; Derivatives thereof (cellulose D 21) [4]

37/

Dextran; Derivatives thereof [2]

37/

Alginic acid; Derivatives thereof (foodstuff preparations A 23 L 1/05) [2]

37/

Pectin; Derivatives thereof [2]

37/

Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof [2]

37/

Heparin; Derivatives thereof [2]

37/

Agar-agar; Derivatives thereof [2]

37/

Hemicellulose; Derivatives thereof [2]

37/

Cyclodextrin; Derivatives thereof [2]

37/

Reserve carbohydrates, e.g. glycogen, inulin, laminarin; Derivatives thereof [4]