ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON (manufacture or treatment of artificial threads, fibres, bristles or ribbons D 01)
Note
Processes using enzymes or micro-organisms in order to:
(i)
liberate, separate or purify a pre-existing compound or composition, or to
(ii)
treat textiles or clean solid surfaces of materials
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
1
/
00
Preparatory treatment of cellulose for making derivatives thereof
1
/
02
•
Rendering cellulose suitable for esterification
1
/
04
•
•
for the preparation of cellulose nitrate
1
/
06
•
Rendering cellulose suitable for etherification
1
/
08
•
Alkali cellulose
1
/
10
•
•
Apparatus for the preparation of alkali cellulose
1
/
12
•
•
•
Steeping devices
1
/
14
•
•
•
Ripening devices
3
/
00
Preparation of cellulose esters of organic acids
3
/
02
•
Catalysts used for the esterification
3
/
04
•
Cellulose formate
3
/
06
•
Cellulose acetate
3
/
08
•
of monobasic organic acids with three or more carbon atoms
3
/
10
•
•
with five or more carbon atoms
3
/
12
•
of polybasic organic acids
3
/
14
•
in which the organic acid residue contains substituents, e.g. NH2, Cl
3
/
16
•
Preparation of mixed organic cellulose esters
3
/
18
•
•
Aceto-butyrates
3
/
20
•
Esterification with maintenance of the fibrous structure of the cellulose (surface esterification of textiles D 06 M 13/00)
3
/
22
•
Post-esterification treatments, including purification
