GB745159A - Process for the production of terephthalic acid and phthalic acid - Google Patents
Process for the production of terephthalic acid and phthalic acidInfo
- Publication number
- GB745159A GB745159A GB11640/53A GB1164053A GB745159A GB 745159 A GB745159 A GB 745159A GB 11640/53 A GB11640/53 A GB 11640/53A GB 1164053 A GB1164053 A GB 1164053A GB 745159 A GB745159 A GB 745159A
- Authority
- GB
- United Kingdom
- Prior art keywords
- xylene
- octenes
- phthalic
- oxidation
- mixture
- 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
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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
- C07C63/04—Monocyclic monocarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
- C07C63/14—Monocyclic dicarboxylic acids
- C07C63/15—Monocyclic dicarboxylic acids all carboxyl groups bound to carbon atoms of the six-membered aromatic ring
- C07C63/16—1,2 - Benzenedicarboxylic acid
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
- C07C63/14—Monocyclic dicarboxylic acids
- C07C63/15—Monocyclic dicarboxylic acids all carboxyl groups bound to carbon atoms of the six-membered aromatic ring
- C07C63/26—1,4 - Benzenedicarboxylic acid
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)
Abstract
Phthalic and terephthalic acids are produced by converting straight-chain olefins having 2, 4 or 6 carbon atoms in the molecule or a mixture of branched pentene, CH3.CH(CH3).CH=CH2, and propene into octenes by the process of Specifications 713,081 and 742,642, aromatizing these octenes to yield mixtures containing o-xylene and p-xylene and substantially free from m-xylene, and oxidizing the o- or p-xylene. The octenes which are formed have the carbon structures <FORM:0745159/IV(a)/1> , <FORM:0745159/IV(a)/2> or <FORM:0745159/IV(a)/3> and include, for example, 2-ethylhexene-1, 2 - methyl - 5 - dimethylpentene - 1, 2 - isopropylpentene-1 and n-octene. Aromatization may be effected in the presence of a chromium-containing catalyst, e.g. chromic oxide. The major proportion of p-xylene is separated by deep cooling, preferably after the addition of methanol, the p-xylene crystallizing out. The liquid residue is separated by distillation into p-xylene or a mixture thereof with ethyl benzene, and o-xylene. Terephthalic acid may be obtained by oxidation of the p-xylene with potassium permanganate or with air in the presence of cobalt naphthenate. Phthalic acid anhydride may be obtained from o-xylene by oxidation with air using tin vanadate as catalyst. Specification 623,836 also is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE745159X | 1952-04-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB745159A true GB745159A (en) | 1956-02-22 |
Family
ID=6648195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11640/53A Expired GB745159A (en) | 1952-04-25 | 1953-04-27 | Process for the production of terephthalic acid and phthalic acid |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB745159A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9388110B2 (en) | 2013-12-12 | 2016-07-12 | Saudi Arabian Oil Company | Liquid phase oxidation of aromatic feedstocks with manganate recycling to produce carboxylic acids |
-
1953
- 1953-04-27 GB GB11640/53A patent/GB745159A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9388110B2 (en) | 2013-12-12 | 2016-07-12 | Saudi Arabian Oil Company | Liquid phase oxidation of aromatic feedstocks with manganate recycling to produce carboxylic acids |
US9902677B2 (en) | 2013-12-12 | 2018-02-27 | Saudi Arabian Oil Company | Liquid phase oxidation of aromatic feedstocks with manganate recycling to produce carboxylic acids |
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