AU6620298A - Method for producing cellulose acetate - Google Patents
Method for producing cellulose acetateInfo
- Publication number
- AU6620298A AU6620298A AU66202/98A AU6620298A AU6620298A AU 6620298 A AU6620298 A AU 6620298A AU 66202/98 A AU66202/98 A AU 66202/98A AU 6620298 A AU6620298 A AU 6620298A AU 6620298 A AU6620298 A AU 6620298A
- Authority
- AU
- Australia
- Prior art keywords
- cellulose acetate
- cellulose
- base
- acetylation
- producing cellulose
- 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.)
- Abandoned
Links
- 229920002301 cellulose acetate Polymers 0.000 title abstract 5
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 230000021736 acetylation Effects 0.000 abstract 4
- 238000006640 acetylation reaction Methods 0.000 abstract 4
- 239000008186 active pharmaceutical agent Substances 0.000 abstract 4
- 239000003795 chemical substances by application Substances 0.000 abstract 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 abstract 3
- 229920002678 cellulose Polymers 0.000 abstract 3
- 239000001913 cellulose Substances 0.000 abstract 3
- 239000003377 acid catalyst Substances 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 abstract 1
- 238000000034 method 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
- C08B3/00—Preparation of cellulose esters of organic acids
- C08B3/06—Cellulose acetate, e.g. mono-acetate, di-acetate or tri-acetate
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)
Abstract
The invention relates to a method for producing cellulose acetate with a DS between 1.5 and 2.9 by reacting cellulose with an acetylation agent. According to said method, the cellulose is reacted with a first acetylation agent using a base catalyst in a first step, to form a cellulose acetate with a DS of less than 1, and then reacted with a second acetylation agent using an acid catalyst in a second step to form a cellulose acetate with a DS of 1.5 to 2.9. The first and second acetylation agents are preferably acetic anhydride. The cellulose is preferably impregnated with an excess base in the first step, said base then being removed until the quantity of base which is stoichiometrically necessary to form the cellulose acetate with a DS<1 is achieved.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19711502A DE19711502C1 (en) | 1997-03-19 | 1997-03-19 | Process for the production of cellulose acetate |
| DE19711502 | 1997-03-19 | ||
| PCT/EP1998/000607 WO1998041543A1 (en) | 1997-03-19 | 1998-02-04 | Method for producing cellulose acetate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU6620298A true AU6620298A (en) | 1998-10-12 |
Family
ID=7823932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU66202/98A Abandoned AU6620298A (en) | 1997-03-19 | 1998-02-04 | Method for producing cellulose acetate |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0970129B1 (en) |
| JP (1) | JP2000511588A (en) |
| AT (1) | ATE207936T1 (en) |
| AU (1) | AU6620298A (en) |
| BR (1) | BR9808353A (en) |
| CA (1) | CA2283980A1 (en) |
| DE (2) | DE19711502C1 (en) |
| WO (1) | WO1998041543A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276732B (en) * | 2003-11-28 | 2016-01-20 | 伊士曼化工公司 | Cellulose interpolymers and method for oxidation |
| JP5470032B2 (en) | 2009-08-12 | 2014-04-16 | 富士フイルム株式会社 | Cellulose derivative, thermoforming material, molded body, method for producing the same, and casing for electric and electronic equipment |
| JP5757681B2 (en) | 2009-08-12 | 2015-07-29 | 富士フイルム株式会社 | CELLULOSE DERIVATIVE, RESIN COMPOSITION, MOLDED BODY, PROCESS FOR PRODUCING THE SAME, AND CASE FOR ELECTRICAL / Electronic Equipment |
| US20130096296A1 (en) * | 2011-10-14 | 2013-04-18 | Celanese Acetate Llc | Methods for Synthesizing Acylated Cellulose Through Instillation of an Acidic Catalyst |
| US20130096298A1 (en) * | 2011-10-14 | 2013-04-18 | Celanese Acetate Llc | Methods for Synthesizing Acylated Cellulose Through Instillation of an Acidic Catalyst |
| US20130096297A1 (en) * | 2011-10-14 | 2013-04-18 | Celanese Acetate Llc | Methods for Synthesizing Acylated Cellulose Through Instillation of an Acidic Catalyst |
| JP6802720B2 (en) | 2017-01-25 | 2020-12-16 | 株式会社ダイセル | Cellulose acetate and moldings |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE562712C (en) * | 1927-11-25 | 1932-10-28 | Otto Faust Dr | Process for the refinement of cellulose raw material of all kinds |
-
1997
- 1997-03-19 DE DE19711502A patent/DE19711502C1/en not_active Expired - Fee Related
-
1998
- 1998-02-04 JP JP10540055A patent/JP2000511588A/en active Pending
- 1998-02-04 EP EP98908057A patent/EP0970129B1/en not_active Expired - Lifetime
- 1998-02-04 DE DE59801963T patent/DE59801963D1/en not_active Expired - Fee Related
- 1998-02-04 BR BR9808353-8A patent/BR9808353A/en unknown
- 1998-02-04 WO PCT/EP1998/000607 patent/WO1998041543A1/en not_active Ceased
- 1998-02-04 AT AT98908057T patent/ATE207936T1/en not_active IP Right Cessation
- 1998-02-04 CA CA002283980A patent/CA2283980A1/en not_active Abandoned
- 1998-02-04 AU AU66202/98A patent/AU6620298A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE19711502C1 (en) | 1998-07-30 |
| ATE207936T1 (en) | 2001-11-15 |
| BR9808353A (en) | 2000-05-23 |
| CA2283980A1 (en) | 1998-09-24 |
| DE59801963D1 (en) | 2001-12-06 |
| EP0970129A1 (en) | 2000-01-12 |
| JP2000511588A (en) | 2000-09-05 |
| EP0970129B1 (en) | 2001-10-31 |
| WO1998041543A1 (en) | 1998-09-24 |
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