RU99104145A - METHOD FOR PRODUCING AROMATIC Tricarboxylic Acids - Google Patents
METHOD FOR PRODUCING AROMATIC Tricarboxylic AcidsInfo
- Publication number
- RU99104145A RU99104145A RU99104145/04A RU99104145A RU99104145A RU 99104145 A RU99104145 A RU 99104145A RU 99104145/04 A RU99104145/04 A RU 99104145/04A RU 99104145 A RU99104145 A RU 99104145A RU 99104145 A RU99104145 A RU 99104145A
- Authority
- RU
- Russia
- Prior art keywords
- reactor
- concentration
- relative
- range
- trimethylbenzene
- Prior art date
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
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
- C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Claims (22)
а) обеспечение, по меньшей мере, последовательности трех стадий реакции, состоящих из одного начального реактора, одного или более чем один промежуточного реактора, одного конечного реактора;
b) введение в начальный реактор кислород-содержащего газа, ароматического сырья, растворителя и первичного катализатора, обеспеченного переходными металлами или металлами с переменной валентностью, такими как кобальт и/или марганец; причем катализ промотируется посредством применения кетона, такого как метилэтилкетон, или альдегида; температура в начальном реакторе составляет от 90°С до 140°С;
с) введение в промежуточный(ые) реактор(ы) кислородсодержащего газа, вытекающего потока из первого реактора и вторичного катализатора, состоящего из катализаторов окисления тяжелого металла, такого как церий и цирконий; в промежуточном(ых) реакторе(ах) катализ обеспечивается добавлением брома в форме органических или неорганических соединений, таких как бромистый водород; температура в промежуточном(ых) реакторе(ах) находится в интервале от 130 до 190°С;
d) введение в конечный реактор кислород-содержащего газа, вытекающего потока из промежуточного(ных) реактора(ов) и потока маточной жидкости, содержащего катализатор, выделенный из секции выделения продукта и реактивированный добавления брома; температура в конечном реакторе составляет 170 - 220°С;
е) работу реакционной системы при давлении не ниже, чем минимальное давление, необходимое для сохранения растворителя в жидкой фазе;
f) применение в качестве окисляющей среды кислорода, растворенного в рециркулирующем потоке реакционных газообразных вытекающих потоков, состоящем, главным образом, из диоксида углерода, оксида углерода, воды, паров растворителя и органических соединений;
g) регулирование содержания кислорода на каждой стадии реакции для гарантирования достаточной скорости окисления, обеспечивая в то же время, в целях безопасности, концентрацию кислорода в выходящем газе, не превышающую 8 об.%.1. A method of producing aromatic tricarboxylic acids, similar to trimellitic acid, by continuous liquid-phase oxidation of trimethylaromatic raw materials like pseudocumene, including:
a) providing at least a sequence of three reaction stages, consisting of one initial reactor, one or more than one intermediate reactor, one final reactor;
b) introducing into the initial reactor an oxygen-containing gas, an aromatic feed, a solvent and a primary catalyst provided with transition metals or metals with variable valency, such as cobalt and / or manganese; wherein catalysis is promoted through the use of a ketone such as methyl ethyl ketone or an aldehyde; the temperature in the initial reactor is from 90 ° C to 140 ° C;
c) introducing into the intermediate reactor (s) an oxygen-containing gas flowing out of the first reactor and a secondary catalyst consisting of heavy metal oxidation catalysts such as cerium and zirconium; in the intermediate reactor (s), catalysis is provided by the addition of bromine in the form of organic or inorganic compounds, such as hydrogen bromide; the temperature in the intermediate (s) reactor (s) is in the range from 130 to 190 ° C;
d) introducing into the final reactor an oxygen-containing gas, a effluent from the intermediate reactor (s) and a mother liquor stream containing a catalyst isolated from the product separation section and reactivated bromine additions; the temperature in the final reactor is 170 - 220 ° C;
e) the operation of the reaction system at a pressure not lower than the minimum pressure necessary to maintain the solvent in the liquid phase;
f) using, as an oxidizing medium, oxygen dissolved in the recycle stream of the reaction gaseous effluent, consisting mainly of carbon dioxide, carbon monoxide, water, solvent vapors and organic compounds;
g) regulation of the oxygen content at each stage of the reaction to ensure a sufficient oxidation rate, while at the same time ensuring, for safety reasons, the oxygen concentration in the exhaust gas not exceeding 8% vol.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE970418A IE970418A1 (en) | 1997-06-04 | 1997-06-04 | Process for production of aromatic tricarboxylic acids |
IE970418 | 1997-06-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
RU99104145A true RU99104145A (en) | 2000-12-27 |
Family
ID=11041503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU99104145/04A RU99104145A (en) | 1997-06-04 | 1998-06-02 | METHOD FOR PRODUCING AROMATIC Tricarboxylic Acids |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0914314A1 (en) |
KR (1) | KR20000068053A (en) |
CN (1) | CN1228077A (en) |
AU (1) | AU731622B2 (en) |
BR (1) | BR9806036A (en) |
CA (1) | CA2260846A1 (en) |
IE (1) | IE970418A1 (en) |
RU (1) | RU99104145A (en) |
WO (1) | WO1998055441A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020151745A1 (en) | 1999-05-10 | 2002-10-17 | Kazuo Tanaka | Process for producing pyromellitic acid |
DE60009785T2 (en) * | 1999-05-10 | 2004-08-19 | Mitsubishi Gas Chemical Co., Inc. | Process for the preparation of pyromellitic acid |
MY123568A (en) * | 2000-06-09 | 2006-05-31 | Mitsubishi Gas Chemical Co | Process for producing trimellitec anhydride |
JP4678081B2 (en) * | 2000-06-09 | 2011-04-27 | 三菱瓦斯化学株式会社 | Method for producing trimellitic acid |
SG103937A1 (en) | 2002-09-11 | 2004-05-26 | Mitsubishi Gas Chemical Co | Process for producing trimellitic acid |
KR102055750B1 (en) * | 2018-02-21 | 2019-12-13 | 포항공과대학교 산학협력단 | Manufacturing method of porous metal-organic frameworks with heterogeneous pores using decarboxylation |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3562318A (en) * | 1966-11-10 | 1971-02-09 | Petro Tex Chem Corp | Catalytic oxidation process of mono-aryl compounds |
US3683016A (en) * | 1970-04-24 | 1972-08-08 | Standard Oil Co | Staged catalyst addition for catalytic liquid phase oxidation of pseudocumene to trimellitic acid |
BE788349A (en) * | 1971-09-17 | 1973-01-02 | Labofina Sa | LIQUID PHASE OXIDATION PROCESS OF METHYLAROMATIC COMPOUNDS IN POLYCARBOXYLIC ACIDS |
US3920735A (en) * | 1973-05-21 | 1975-11-18 | Standard Oil Co | Zirconium enhanced activity of transition metal-bromine catalysis of di- and trimethyl benzene oxidation in liquid phase |
JPS6366149A (en) * | 1986-09-09 | 1988-03-24 | Idemitsu Petrochem Co Ltd | Production of trimellitic acid |
-
1997
- 1997-06-04 IE IE970418A patent/IE970418A1/en unknown
-
1998
- 1998-06-02 BR BR9806036A patent/BR9806036A/en not_active Application Discontinuation
- 1998-06-02 CN CN98800761A patent/CN1228077A/en active Pending
- 1998-06-02 RU RU99104145/04A patent/RU99104145A/en not_active Application Discontinuation
- 1998-06-02 KR KR1019997000946A patent/KR20000068053A/en not_active Application Discontinuation
- 1998-06-02 WO PCT/EP1998/003291 patent/WO1998055441A1/en not_active Application Discontinuation
- 1998-06-02 AU AU87272/98A patent/AU731622B2/en not_active Ceased
- 1998-06-02 CA CA002260846A patent/CA2260846A1/en not_active Abandoned
- 1998-06-02 EP EP98938600A patent/EP0914314A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
IE970418A1 (en) | 1998-12-16 |
WO1998055441A1 (en) | 1998-12-10 |
AU731622B2 (en) | 2001-04-05 |
EP0914314A1 (en) | 1999-05-12 |
CN1228077A (en) | 1999-09-08 |
CA2260846A1 (en) | 1998-12-10 |
KR20000068053A (en) | 2000-11-25 |
BR9806036A (en) | 1999-08-24 |
AU8727298A (en) | 1998-12-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FA93 | Acknowledgement of application withdrawn (no request for examination) |
Effective date: 20060725 |