IT1250713B - Procedimento per la separazione della fase acquosa dall'acetato di cellulosa - Google Patents
Procedimento per la separazione della fase acquosa dall'acetato di cellulosaInfo
- Publication number
- IT1250713B IT1250713B ITMI912103A ITMI912103A IT1250713B IT 1250713 B IT1250713 B IT 1250713B IT MI912103 A ITMI912103 A IT MI912103A IT MI912103 A ITMI912103 A IT MI912103A IT 1250713 B IT1250713 B IT 1250713B
- Authority
- IT
- Italy
- Prior art keywords
- cellulose acetate
- separation
- procedure
- aqueous phase
- precipitated
- Prior art date
Links
- 229920002301 cellulose acetate Polymers 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 239000008346 aqueous phase Substances 0.000 title 1
- 238000000926 separation method Methods 0.000 title 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 abstract 1
- 229920002678 cellulose Polymers 0.000 abstract 1
- 239000001913 cellulose Substances 0.000 abstract 1
- 230000032050 esterification Effects 0.000 abstract 1
- 238000005886 esterification reaction Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C08B3/22—Post-esterification treatments, including purification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
- B01D11/0203—Solvent extraction of solids with a supercritical fluid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Extraction Or Liquid Replacement (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Procedimento per ridurre il contenuto di acqua ed acido acetico dall'acetato di cellulosa precipitato dalle soluzioni di esterificazione della cellulosa consistente nel sottoporre l'acetato precipitato ad estrazione con un liquido supercritico.
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI912103A IT1250713B (it) | 1991-07-29 | 1991-07-29 | Procedimento per la separazione della fase acquosa dall'acetato di cellulosa |
AT92916353T ATE139543T1 (de) | 1991-07-29 | 1992-07-22 | Prozess zur abtrennung der wässrigen phase von zelluloseacetat |
US08/641,202 US5667691A (en) | 1991-07-29 | 1992-07-22 | Process for extracting water and acetic acid from the aqueous phase of cellulose acetate |
JP5503223A JPH06502214A (ja) | 1991-07-29 | 1992-07-22 | 酢酸セルロースからの水性相分離法 |
EP92916353A EP0550732B1 (en) | 1991-07-29 | 1992-07-22 | Process for the separation of the aqueous phase from cellulose acetate |
ES92916353T ES2089544T3 (es) | 1991-07-29 | 1992-07-22 | Procedimiento de separacion de la fase acuosa del acetato de celulosa. |
KR1019930700937A KR100235263B1 (ko) | 1991-07-29 | 1992-07-22 | 셀룰로오스 아세테이트로부터 수성상을 분리시키는 방법 |
CA002091758A CA2091758A1 (en) | 1991-07-29 | 1992-07-22 | Process for the separation of the aqueous phase from cellulose acetate |
PCT/EP1992/001669 WO1993003064A1 (en) | 1991-07-29 | 1992-07-22 | Process for the separation of the aqueous phase from cellulose acetate |
DE69211671T DE69211671T2 (de) | 1991-07-29 | 1992-07-22 | Prozess zur abtrennung der wässrigen phase von zelluloseacetat |
AU23458/92A AU664563B2 (en) | 1991-07-29 | 1992-07-22 | Process for the separation of the aqueous phase from cellulose acetate |
TW081105937A TW211526B (it) | 1991-07-29 | 1992-07-28 | |
CN92109510A CN1035382C (zh) | 1991-07-29 | 1992-07-28 | 分离醋酸纤维素中的水相的方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI912103A IT1250713B (it) | 1991-07-29 | 1991-07-29 | Procedimento per la separazione della fase acquosa dall'acetato di cellulosa |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI912103A0 ITMI912103A0 (it) | 1991-07-29 |
ITMI912103A1 ITMI912103A1 (it) | 1993-01-30 |
IT1250713B true IT1250713B (it) | 1995-04-21 |
Family
ID=11360454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITMI912103A IT1250713B (it) | 1991-07-29 | 1991-07-29 | Procedimento per la separazione della fase acquosa dall'acetato di cellulosa |
Country Status (13)
Country | Link |
---|---|
US (1) | US5667691A (it) |
EP (1) | EP0550732B1 (it) |
JP (1) | JPH06502214A (it) |
KR (1) | KR100235263B1 (it) |
CN (1) | CN1035382C (it) |
AT (1) | ATE139543T1 (it) |
AU (1) | AU664563B2 (it) |
CA (1) | CA2091758A1 (it) |
DE (1) | DE69211671T2 (it) |
ES (1) | ES2089544T3 (it) |
IT (1) | IT1250713B (it) |
TW (1) | TW211526B (it) |
WO (1) | WO1993003064A1 (it) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5977348A (en) * | 1997-07-25 | 1999-11-02 | National Starch And Chemical Investment Holding Corporation | Polysaccharide modification in densified fluid |
WO2013028489A1 (en) * | 2011-08-19 | 2013-02-28 | Celanese International Corporation | Acetylation of cellulose in densified gas |
CN103304672B (zh) * | 2013-06-19 | 2015-06-10 | 山东理工大学 | 超(亚)临界co2中制备醋酸纤维素的方法及其装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE332390C (de) * | 1919-05-13 | 1921-02-02 | Martin Lange Dr | Verfahren und Vorrichtung zur Erzeugung synthetischer Edelsteine oder anderer Gebilde aus hochschmelzendem Material |
FR1451503A (fr) * | 1965-07-21 | 1966-01-07 | Rhodiaceta | Procédé de fabrication d'esters de cellulose |
JPS567602A (en) * | 1979-07-02 | 1981-01-26 | Hitachi Ltd | Production of porous separating membrane |
US4250331A (en) * | 1979-10-09 | 1981-02-10 | E. I. Du Pont De Nemours And Company | Removal of organic acids from dilute aqueous solutions of salts of organic acids by supercritical fluids |
DE3323940A1 (de) * | 1983-07-02 | 1985-01-10 | Hoechst Ag, 6230 Frankfurt | Verfahren zur reinigung von polymeren |
US4770780A (en) * | 1984-04-25 | 1988-09-13 | Cf Systems Corporation | Liquid CO2 /cosolvent extraction |
JPH02292216A (ja) * | 1989-05-02 | 1990-12-03 | Mori Seiyu Kk | 超臨界炭酸ガス抽出による医薬品類の脱溶剤方法 |
US5049235A (en) * | 1989-12-28 | 1991-09-17 | The Procter & Gamble Company | Poly(methyl vinyl ether-co-maleate) and polyol modified cellulostic fiber |
-
1991
- 1991-07-29 IT ITMI912103A patent/IT1250713B/it active IP Right Grant
-
1992
- 1992-07-22 AT AT92916353T patent/ATE139543T1/de not_active IP Right Cessation
- 1992-07-22 DE DE69211671T patent/DE69211671T2/de not_active Expired - Fee Related
- 1992-07-22 ES ES92916353T patent/ES2089544T3/es not_active Expired - Lifetime
- 1992-07-22 KR KR1019930700937A patent/KR100235263B1/ko not_active IP Right Cessation
- 1992-07-22 EP EP92916353A patent/EP0550732B1/en not_active Expired - Lifetime
- 1992-07-22 WO PCT/EP1992/001669 patent/WO1993003064A1/en active IP Right Grant
- 1992-07-22 US US08/641,202 patent/US5667691A/en not_active Expired - Fee Related
- 1992-07-22 AU AU23458/92A patent/AU664563B2/en not_active Ceased
- 1992-07-22 JP JP5503223A patent/JPH06502214A/ja active Pending
- 1992-07-22 CA CA002091758A patent/CA2091758A1/en not_active Abandoned
- 1992-07-28 TW TW081105937A patent/TW211526B/zh active
- 1992-07-28 CN CN92109510A patent/CN1035382C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2091758A1 (en) | 1993-01-30 |
ITMI912103A1 (it) | 1993-01-30 |
KR100235263B1 (ko) | 1999-12-15 |
AU2345892A (en) | 1993-03-02 |
KR930702398A (ko) | 1993-09-09 |
CN1070648A (zh) | 1993-04-07 |
DE69211671D1 (de) | 1996-07-25 |
ITMI912103A0 (it) | 1991-07-29 |
JPH06502214A (ja) | 1994-03-10 |
WO1993003064A1 (en) | 1993-02-18 |
ES2089544T3 (es) | 1996-10-01 |
TW211526B (it) | 1993-08-21 |
AU664563B2 (en) | 1995-11-23 |
EP0550732B1 (en) | 1996-06-19 |
EP0550732A1 (en) | 1993-07-14 |
US5667691A (en) | 1997-09-16 |
DE69211671T2 (de) | 1996-12-12 |
CN1035382C (zh) | 1997-07-09 |
ATE139543T1 (de) | 1996-07-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19950731 |