FR2309505B1 - - Google Patents
Info
- Publication number
- FR2309505B1 FR2309505B1 FR7622060A FR7622060A FR2309505B1 FR 2309505 B1 FR2309505 B1 FR 2309505B1 FR 7622060 A FR7622060 A FR 7622060A FR 7622060 A FR7622060 A FR 7622060A FR 2309505 B1 FR2309505 B1 FR 2309505B1
- Authority
- FR
- France
- 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
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D303/00—Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
- C07D303/02—Compounds containing oxirane rings
- C07D303/48—Compounds containing oxirane rings with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms, e.g. ester or nitrile radicals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/90—Regeneration or reactivation
- B01J23/92—Regeneration or reactivation of catalysts comprising metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/367—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by introduction of functional groups containing oxygen only in singly bound form
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/47—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/235—Saturated compounds containing more than one carboxyl group
- C07C59/245—Saturated compounds containing more than one carboxyl group containing hydroxy or O-metal groups
- C07C59/255—Tartaric acid
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- 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
- Y02P20/584—Recycling of catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Catalysts (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2508228A DE2508228B2 (en) | 1975-02-26 | 1975-02-26 | Process for the production of pure grape acid and mesotartaric acid |
DE2543333A DE2543333C2 (en) | 1975-09-29 | 1975-09-29 | Process for the simultaneous production of pure grape acid and meso-tartaric acid |
DE19752543332 DE2543332C3 (en) | 1975-09-29 | 1975-09-29 | Process for separating maleic acid from synthetic tartaric acid |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2309505A1 FR2309505A1 (en) | 1976-11-26 |
FR2309505B1 true FR2309505B1 (en) | 1982-07-16 |
Family
ID=27186289
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7605305A Granted FR2302293A1 (en) | 1975-02-26 | 1976-02-25 | Pure racemic tartaric acid and meso tartaric acid - prepn. from maleic acid in presence of alkali tungstates or molybdates as catalyst |
FR7622060A Granted FR2309505A1 (en) | 1975-02-26 | 1976-07-20 | PROCESS FOR THE PREPARATION OF PURE RACEMIC TARTARIC ACID AND MESO-TARTARIC ACID FROM MALEIC ACID AND PROCESS FOR SEPARATING THE LATTER |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7605305A Granted FR2302293A1 (en) | 1975-02-26 | 1976-02-25 | Pure racemic tartaric acid and meso tartaric acid - prepn. from maleic acid in presence of alkali tungstates or molybdates as catalyst |
Country Status (1)
Country | Link |
---|---|
FR (2) | FR2302293A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5344590A (en) * | 1993-01-06 | 1994-09-06 | W. R. Grace & Co.-Conn. | Method for inhibiting corrosion of metals using polytartaric acids |
EP2438012B1 (en) * | 2009-06-02 | 2014-05-07 | Akzo Nobel Chemicals International B.V. | Process for the preparation of a composition comprising meso-tartaric acid |
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1976
- 1976-02-25 FR FR7605305A patent/FR2302293A1/en active Granted
- 1976-07-20 FR FR7622060A patent/FR2309505A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2309505A1 (en) | 1976-11-26 |
FR2302293A1 (en) | 1976-09-24 |
FR2302293B1 (en) | 1978-07-13 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |