JPS57167942A - Continuous preparation of trimellitic acid - Google Patents
Continuous preparation of trimellitic acidInfo
- Publication number
- JPS57167942A JPS57167942A JP56052444A JP5244481A JPS57167942A JP S57167942 A JPS57167942 A JP S57167942A JP 56052444 A JP56052444 A JP 56052444A JP 5244481 A JP5244481 A JP 5244481A JP S57167942 A JPS57167942 A JP S57167942A
- Authority
- JP
- Japan
- Prior art keywords
- concentration
- compound
- pseudocumene
- catalyst
- stage
- 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.)
- Pending
Links
- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 title abstract 4
- GWHJZXXIDMPWGX-UHFFFAOYSA-N 1,2,4-trimethylbenzene Chemical compound CC1=CC=C(C)C(C)=C1 GWHJZXXIDMPWGX-UHFFFAOYSA-N 0.000 abstract 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 6
- 239000003054 catalyst Substances 0.000 abstract 3
- 150000001875 compounds Chemical class 0.000 abstract 3
- 238000007254 oxidation reaction Methods 0.000 abstract 3
- 229910052794 bromium Inorganic materials 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 239000002904 solvent Substances 0.000 abstract 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 abstract 1
- -1 bromine compound Chemical class 0.000 abstract 1
- 125000001246 bromo group Chemical group Br* 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000009849 deactivation Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
Classifications
-
- 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
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
PURPOSE: To prepare the titled compound, in high purity and yield, by the two- stage continuous oxidation reaction of pseudocumene at a specific temperature using a catalyst comprising Co, Mn and Br at a specific concentration, keeping the concentration of the raw material in the produced liquid at the first stage below a specific level.
CONSTITUTION: Trimellitic acid is prepared by the continuous oxidation of pseudocumene with an O2-containing gas in an acetic acid solvent in the presence of a catalyst composed mainly of a Co compound, an Mn compound and a bromine compound. In the above process, the first stage reaction is carried out at 120W180°C keeping the amount of Co to 0.01W0.09wt% of the acetic acid solvent, that of Mn to 1W50wt% of Co, and that of Br atom to 6W20 times the weight of Co, and reducing the concentration of the residual pseudocumene in the produced liquid to ≤0.4wt%. After adjusting the concentration of Mn to 15W50wt% of Co, the second oxidation reaction is carried out at 180W230°C. The deactivation of the catalyst can be effectively prevented.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56052444A JPS57167942A (en) | 1981-04-09 | 1981-04-09 | Continuous preparation of trimellitic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56052444A JPS57167942A (en) | 1981-04-09 | 1981-04-09 | Continuous preparation of trimellitic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57167942A true JPS57167942A (en) | 1982-10-16 |
Family
ID=12914898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56052444A Pending JPS57167942A (en) | 1981-04-09 | 1981-04-09 | Continuous preparation of trimellitic acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57167942A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61280448A (en) * | 1985-05-30 | 1986-12-11 | アモコ・コ−ポレ−シヨン | Manufacture of trimellitic acid anhydride and pyromellitic acid dianhydride |
| US5171881A (en) * | 1990-04-03 | 1992-12-15 | Yukong Limited | Process for producing trimellitic acid |
| JP2005145954A (en) * | 2003-10-20 | 2005-06-09 | Mitsubishi Gas Chem Co Inc | Preparation method of pyromellitic acid |
-
1981
- 1981-04-09 JP JP56052444A patent/JPS57167942A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61280448A (en) * | 1985-05-30 | 1986-12-11 | アモコ・コ−ポレ−シヨン | Manufacture of trimellitic acid anhydride and pyromellitic acid dianhydride |
| US5171881A (en) * | 1990-04-03 | 1992-12-15 | Yukong Limited | Process for producing trimellitic acid |
| JP2005145954A (en) * | 2003-10-20 | 2005-06-09 | Mitsubishi Gas Chem Co Inc | Preparation method of pyromellitic acid |
| JP4734877B2 (en) * | 2003-10-20 | 2011-07-27 | 三菱瓦斯化学株式会社 | Method for producing pyromellitic acid |
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