GB793160A - A process for the esterification of isophthalic acid - Google Patents
A process for the esterification of isophthalic acidInfo
- Publication number
- GB793160A GB793160A GB482/57A GB48257A GB793160A GB 793160 A GB793160 A GB 793160A GB 482/57 A GB482/57 A GB 482/57A GB 48257 A GB48257 A GB 48257A GB 793160 A GB793160 A GB 793160A
- Authority
- GB
- United Kingdom
- Prior art keywords
- isophthalic acid
- water content
- water
- per cent
- product
- 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
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/76—Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring
- C07C69/80—Phthalic acid esters
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Diesters of isophthalic acid are prepared by heating isophthalic acid with an excess of an alcohol, in the absence of a catalyst, at elevated pressure and at a temperature of more than 150 DEG C. The product crystallizes out on cooling and the alcoholic mother liquor obtained is used for further esterification of a fresh quantity of isophthalic acid without the removal or after only partial removal of the water formed in the reaction. The alcoholic mother liquors may be used several times provided the water content remains below 30 per cent. A portion of the mother liquors may be distilled to remove some of the water and reduce the total water content to below 30 per cent. As the water content rises the amount of monoester increases and this is further esterified in the next cycle. The alcohols specified are those containing up to 4 carbon atoms, preferably methanol, and the alcohol is normally present in a 20-40 fold molar excess. An example is given where methanol mother liquors are cycled 6 times to give a yield of diester of 88 per cent and the composition of the product and the amount of water present are given after each step. A further example shows the effect on the composition of the product of increasing the water content of the reaction mixture. Specification 695,566 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL203433A NL88247C (en) | 1956-01-06 | 1956-01-06 | PROCESS FOR THE ESTERISATION OF ISOPHTALIC ACID |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB793160A true GB793160A (en) | 1958-04-09 |
Family
ID=19834469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB482/57A Expired GB793160A (en) | 1956-01-06 | 1957-01-04 | A process for the esterification of isophthalic acid |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE553930A (en) |
| DE (1) | DE1057595B (en) |
| FR (1) | FR1163761A (en) |
| GB (1) | GB793160A (en) |
| NL (1) | NL88247C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3484478A (en) * | 1966-01-11 | 1969-12-16 | Pfizer & Co C | Synthesis of monoesters of itaconic acid |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL80983C (en) * | 1952-04-21 |
-
1956
- 1956-01-06 NL NL203433A patent/NL88247C/en active
-
1957
- 1957-01-04 GB GB482/57A patent/GB793160A/en not_active Expired
- 1957-01-04 DE DEN13152A patent/DE1057595B/en active Pending
- 1957-01-04 BE BE553930A patent/BE553930A/en unknown
- 1957-01-04 FR FR1163761D patent/FR1163761A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3484478A (en) * | 1966-01-11 | 1969-12-16 | Pfizer & Co C | Synthesis of monoesters of itaconic acid |
Also Published As
| Publication number | Publication date |
|---|---|
| NL88247C (en) | 1958-04-17 |
| FR1163761A (en) | 1958-09-30 |
| DE1057595B (en) | 1959-05-21 |
| BE553930A (en) | 1957-07-04 |
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