GB930208A - Process and apparatus for continuous acetylation of fibrous cellulose - Google Patents
Process and apparatus for continuous acetylation of fibrous celluloseInfo
- Publication number
- GB930208A GB930208A GB2080960A GB2080960A GB930208A GB 930208 A GB930208 A GB 930208A GB 2080960 A GB2080960 A GB 2080960A GB 2080960 A GB2080960 A GB 2080960A GB 930208 A GB930208 A GB 930208A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zones
- vapour
- gas
- reaction
- belts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920002678 cellulose Polymers 0.000 title abstract 5
- 239000001913 cellulose Substances 0.000 title abstract 5
- 230000021736 acetylation Effects 0.000 title abstract 3
- 238000006640 acetylation reaction Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title 1
- 238000006243 chemical reaction Methods 0.000 abstract 7
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 abstract 6
- 239000007789 gas Substances 0.000 abstract 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 3
- 229920000297 Rayon Polymers 0.000 abstract 2
- 229920000742 Cotton Polymers 0.000 abstract 1
- RUKCJUBTRDGPCC-UHFFFAOYSA-N acetic acid;acetyl acetate Chemical compound CC(O)=O.CC(=O)OC(C)=O RUKCJUBTRDGPCC-UHFFFAOYSA-N 0.000 abstract 1
- 238000010790 dilution Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 230000007717 exclusion Effects 0.000 abstract 1
- 239000007792 gaseous phase Substances 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 239000011810 insulating material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002964 rayon Substances 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B17/00—Apparatus for esterification or etherification of cellulose
- C08B17/02—Apparatus for esterification or etherification of cellulose for making organic esters of cellulose
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
An apparatus for the continuous acetylation in the gaseous phase of fibrous cellulose comprises lower and upper driven metallic gauge endless belts 1 and 2 (fig. 1) provided with ribs (Figs. 1, 2 and 3). The belts pass over guide pulleys 2 and 3. Fibrous cellulose such as cotton, viscose rayon or cuprammonium rayon is conveyed from left to right by being held between the belts through the inlet zone 4, reaction zone 11 and outlet zone 41 of a reaction chamber 20. The chamber is also provided with moisture exclusion zones 5, 51; gas leakage preventing zones 6, 61; gas reservoirs 7, 71; and gas dilution preventing zones 8, 81. The zones are separated from oneanother by baffle plates 16 which enrircle the belts. Dried air or dried inert gas is introduced into the zones 5, 51 through pipes 23, 231. The zones 7, 71 are provided with outlet pipes 10, 101 for discharging excess gas, the gas being withdrawn by a fan (not shown). The reaction zone 11 occupies the whole space between the inner baffle plates of zones 8 and 81 and comprises a space 15 to prevent surging of vapour leaving the reaction chambers and reaction chambers 24 into which is fed through pipes 13 acetic anhydride vapour or a mixture of this vapour with acetic acid vapour. The vapour is forced through the cellulose held between the belts in the chamber 24 by the fan 14 (Fig. 3) to promote acetylation of the cellulose and remove therefrom heat generated by the reaction. The vapours flow from the chambers 24 through the gaps 12 and 121 into the surge preventing space 15 and from thence through zones 8, 81 into the zones 7, 71 where it mixes with the dried air or other gas fed into the zones 5, 51 and is drawn out through the outlet pipes 10, 101 to a recovery plant. Air heated to temperature above the dew point of the acetic anhydride vapour or acetic anhydride acetic acid vapour is circulated round the reaction chamber 20 by a fan 18 (Fig. 2), the chamber 20 being enclosed in casing 17 covered with heat insulating material 19. <PICT:0930208/IV(a)/1> <PICT:0930208/IV(a)/2> <PICT:0930208/IV(a)/3>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP534060 | 1960-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB930208A true GB930208A (en) | 1963-07-03 |
Family
ID=11608481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2080960A Expired GB930208A (en) | 1960-02-24 | 1960-06-14 | Process and apparatus for continuous acetylation of fibrous cellulose |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1443161A1 (en) |
| GB (1) | GB930208A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3320022A (en) * | 1964-04-27 | 1967-05-16 | Fmc Corp | Method for the continuous vapor phase acetylation of cellulose fiber |
| US3649341A (en) * | 1967-11-17 | 1972-03-14 | Neste Oy | Method for manufacturing partially acylated regenerated cellulose foil or fiber |
-
1960
- 1960-06-14 GB GB2080960A patent/GB930208A/en not_active Expired
- 1960-06-29 DE DE19601443161 patent/DE1443161A1/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3320022A (en) * | 1964-04-27 | 1967-05-16 | Fmc Corp | Method for the continuous vapor phase acetylation of cellulose fiber |
| US3649341A (en) * | 1967-11-17 | 1972-03-14 | Neste Oy | Method for manufacturing partially acylated regenerated cellulose foil or fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1443161A1 (en) | 1968-10-10 |
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