DE69002867T2 - Verfahren zur Herstellung hochreiner o-Toluolsäure. - Google Patents
Verfahren zur Herstellung hochreiner o-Toluolsäure.Info
- Publication number
- DE69002867T2 DE69002867T2 DE90109225T DE69002867T DE69002867T2 DE 69002867 T2 DE69002867 T2 DE 69002867T2 DE 90109225 T DE90109225 T DE 90109225T DE 69002867 T DE69002867 T DE 69002867T DE 69002867 T2 DE69002867 T2 DE 69002867T2
- Authority
- DE
- Germany
- Prior art keywords
- purity
- production
- toluic acid
- toluic
- acid
- 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 - Lifetime
Links
Classifications
-
- 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
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
- C07C51/44—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1121590A JP2676910B2 (ja) | 1989-05-17 | 1989-05-17 | 高純度0‐トルイル酸の製造法 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69002867D1 DE69002867D1 (de) | 1993-09-30 |
DE69002867T2 true DE69002867T2 (de) | 1994-03-31 |
Family
ID=14815015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE90109225T Expired - Lifetime DE69002867T2 (de) | 1989-05-17 | 1990-05-16 | Verfahren zur Herstellung hochreiner o-Toluolsäure. |
Country Status (5)
Country | Link |
---|---|
US (1) | US5011987A (de) |
EP (1) | EP0398282B1 (de) |
JP (1) | JP2676910B2 (de) |
CA (1) | CA2016347C (de) |
DE (1) | DE69002867T2 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5990233A (en) * | 1996-08-16 | 1999-11-23 | National Starch And Chemical Investment Holding Corporation | Rheology modifiers for use in aqueous compositions |
US7960600B2 (en) * | 2009-05-28 | 2011-06-14 | Uop Llc | Process for improved meta-xylene yield from C8 aromatics |
CN110423207B (zh) * | 2019-09-02 | 2022-08-12 | 三门峡环宇生化科技有限公司 | 一种邻氯苯腈的合成方法 |
CN113501754B (zh) * | 2021-07-08 | 2024-05-10 | 山东友道化学有限公司 | 邻二甲苯或间二甲苯氧化反应液的处理方法 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA553081A (en) * | 1958-02-11 | M. Himel Chester | Purification of toluic acids | |
US3235588A (en) * | 1966-02-15 | Purification of benzoic acid | ||
CA547010A (en) * | 1957-10-01 | C. Rapean John | Process for the purification of tertiary-alkyl-substituted benzene carboxylic acids | |
US2653165A (en) * | 1950-09-27 | 1953-09-22 | California Research Corp | Oxidation process |
US2785199A (en) * | 1952-07-01 | 1957-03-12 | Richfield Oil Corp | Purification of toluic acids |
US2712549A (en) * | 1953-10-23 | 1955-07-05 | Richfield Oil Corp | Process of preparing toluic acids |
US2723995A (en) * | 1954-02-19 | 1955-11-15 | California Research Corp | Process for recovering benzoic and toluic acids |
US2712551A (en) * | 1954-05-18 | 1955-07-05 | Richfield Oil Corp | Process of preparing toluic acids |
US2906775A (en) * | 1957-05-06 | 1959-09-29 | Dow Chemical Co | Process for producing aromatic acids |
US3607920A (en) * | 1967-10-20 | 1971-09-21 | Cowles Chem Co | Process for the preparation of high purity isomers of toluic acid |
GB1509461A (en) * | 1975-10-08 | 1978-05-04 | Wellworthy Ltd | Pistons |
DE2636489C2 (de) * | 1976-08-13 | 1984-01-12 | Bayer Ag, 5090 Leverkusen | Verfahren zur Herstellung von Natriumbenzoat |
JPS53112831A (en) * | 1977-03-15 | 1978-10-02 | Matsuyama Sekyu Kagaku Kk | Process for preparing toluylic acid |
JPS5655341A (en) * | 1979-10-12 | 1981-05-15 | Nippon Jiyouriyuu Kogyo Kk | Preparation of high-purity o-toluic acid |
JPH07116096B2 (ja) * | 1986-12-04 | 1995-12-13 | 三菱瓦斯化学株式会社 | 高純度0−トルイル酸の製造方法 |
-
1989
- 1989-05-17 JP JP1121590A patent/JP2676910B2/ja not_active Expired - Lifetime
-
1990
- 1990-05-09 CA CA002016347A patent/CA2016347C/en not_active Expired - Lifetime
- 1990-05-15 US US07/523,868 patent/US5011987A/en not_active Expired - Lifetime
- 1990-05-16 EP EP90109225A patent/EP0398282B1/de not_active Expired - Lifetime
- 1990-05-16 DE DE90109225T patent/DE69002867T2/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0398282B1 (de) | 1993-08-25 |
JP2676910B2 (ja) | 1997-11-17 |
EP0398282A1 (de) | 1990-11-22 |
CA2016347C (en) | 1997-03-25 |
DE69002867D1 (de) | 1993-09-30 |
US5011987A (en) | 1991-04-30 |
CA2016347A1 (en) | 1990-11-17 |
JPH02304046A (ja) | 1990-12-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |