FR2440366A1 - Procede et dispositif pour la preparation de l'acide l-ascorbique - Google Patents
Procede et dispositif pour la preparation de l'acide l-ascorbiqueInfo
- Publication number
- FR2440366A1 FR2440366A1 FR7926878A FR7926878A FR2440366A1 FR 2440366 A1 FR2440366 A1 FR 2440366A1 FR 7926878 A FR7926878 A FR 7926878A FR 7926878 A FR7926878 A FR 7926878A FR 2440366 A1 FR2440366 A1 FR 2440366A1
- Authority
- FR
- France
- Prior art keywords
- ascorbic acid
- preparation
- flow
- enolization
- lactonization
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/56—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D307/62—Three oxygen atoms, e.g. ascorbic acid
Abstract
POUR PREPARER DE L'ACIDE L-ASCORBIQUE A PARTIR DE L'ACIDE L-CETO-GULONIQUE AU MOYEN D'UNE ENOLISATION ET D'UNE LACTONISATION CATALYTIQUES ON OPERE EN CONTINU A L'INTERIEUR D'UN SYSTEME REACTIONNEL TUBULAIRE DANS LEQUEL LA VITESSE D'ECOULEMENT EST REGLEE DE FACON QUE LE TEMPS DE SEJOUR DES MOLECULES REACTIVES SOIT SEMBLABLES A CELUI OBTENU PAR UN ECOULEMENT FREINE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD20877378A DD141832A1 (de) | 1978-10-31 | 1978-10-31 | Verfahren und vorrichtung zur herstellung von l-ascorbinsaeure |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2440366A1 true FR2440366A1 (fr) | 1980-05-30 |
Family
ID=5515085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7926878A Withdrawn FR2440366A1 (fr) | 1978-10-31 | 1979-10-30 | Procede et dispositif pour la preparation de l'acide l-ascorbique |
Country Status (6)
Country | Link |
---|---|
DD (1) | DD141832A1 (fr) |
DE (1) | DE2939052A1 (fr) |
FR (1) | FR2440366A1 (fr) |
GB (1) | GB2034315A (fr) |
HU (1) | HU182734B (fr) |
SU (1) | SU1310398A1 (fr) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4845246A (en) * | 1987-06-15 | 1989-07-04 | Takeda Chemical Industries, Ltd. | Ascorbic acid ester |
ES2075148T3 (es) * | 1989-05-19 | 1995-10-01 | Hayashibara Biochem Lab | Acido alfa-glicosil-l-ascorbico, y su preparacion y usos. |
JPH08176133A (ja) * | 1994-12-26 | 1996-07-09 | Takeda Chem Ind Ltd | L−アスコルビン酸の精製法 |
DE19734086C1 (de) * | 1997-08-07 | 1998-08-13 | Merck Patent Gmbh | Verfahren zur Herstellung von L-Ascorbinsäure |
DE19904821C1 (de) * | 1999-02-05 | 2000-07-06 | Merck Patent Gmbh | Verfahren zur Herstellung von L-Ascobinsäure |
DE10022518A1 (de) | 2000-05-10 | 2001-11-15 | Basf Ag | Verfahren zur Herstellung von L-Ascorbinsäure durch Lactonisierung von 2-Keto-L-gulonsäure oder 2-Keto-L-gulonsäureestern |
WO2002051826A1 (fr) * | 2000-12-22 | 2002-07-04 | Eastman Chemical Company | Procede en continu de production d'acide l-ascorbique |
US6864376B2 (en) | 2000-12-22 | 2005-03-08 | Eastman Chemical Company | Process for producing ascorbic acid |
DE10115325A1 (de) * | 2001-03-28 | 2002-10-17 | Bosch Gmbh Robert | Kraftstoff-Einspritzvorrichtung, insbesondere Injektor, für Brennkraftmaschinen |
US6740762B2 (en) | 2001-08-24 | 2004-05-25 | Eastman Chemical Company | Process for ascorbic acids using alkaline earth silicate catalysts |
US6716997B1 (en) | 2001-10-09 | 2004-04-06 | Eastman Chemical Company | Systems and methods for generation of ascorbic acid with reduced color |
CN110372649A (zh) * | 2019-08-08 | 2019-10-25 | 安徽丰原发酵技术工程研究有限公司 | 一种以古龙酸为原料的一步酸法制备维生素c的方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2462251A (en) * | 1945-05-16 | 1949-02-22 | Merck & Co Inc | Process for preparing ascorbic acids |
-
1978
- 1978-10-31 DD DD20877378A patent/DD141832A1/de not_active IP Right Cessation
-
1979
- 1979-09-26 SU SU797770821A patent/SU1310398A1/ru active
- 1979-09-27 DE DE19792939052 patent/DE2939052A1/de not_active Withdrawn
- 1979-10-24 GB GB7936848A patent/GB2034315A/en not_active Withdrawn
- 1979-10-30 FR FR7926878A patent/FR2440366A1/fr not_active Withdrawn
- 1979-10-31 HU HUJE000896 patent/HU182734B/hu unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2462251A (en) * | 1945-05-16 | 1949-02-22 | Merck & Co Inc | Process for preparing ascorbic acids |
Also Published As
Publication number | Publication date |
---|---|
SU1310398A1 (ru) | 1987-05-15 |
DE2939052A1 (de) | 1980-05-14 |
GB2034315A (en) | 1980-06-04 |
HU182734B (en) | 1984-03-28 |
DD141832A1 (de) | 1980-05-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |