GB628656A - Improvements in or relating to the hydrolysis of organic esters - Google Patents
Improvements in or relating to the hydrolysis of organic estersInfo
- Publication number
- GB628656A GB628656A GB10930/47A GB1093047A GB628656A GB 628656 A GB628656 A GB 628656A GB 10930/47 A GB10930/47 A GB 10930/47A GB 1093047 A GB1093047 A GB 1093047A GB 628656 A GB628656 A GB 628656A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vapours
- column
- acid
- vessel
- fed
- 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
- C07C51/09—Preparation of carboxylic acids or their salts, halides or anhydrides from carboxylic acid esters or lactones
-
- 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
- Y02P20/584—Recycling of catalysts
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
A continuous process for the hydrolysis of an ester of which the acid and alcohol are of substantially different volatilities comprises heating a mixture of the ester and water and, if desired, a hydrolysis catalyst, fractionating the vapours into two fractions containing the bulk of the acid and the bulk of the alcohol respectively, dehydrating the acid fraction in vapour phase, and utilizing the heat of the acid vapours to assist in separation of alcohol from the fraction containing it while condensing said vapours. Methyl formate from tank 7 and constant level vessel 5 is fed to a column 9a associated with a hydrolyzing vessel 13a from which it overflows to succeeding vessels 13b, 13n in cascade fashion. Water is fed to vessel 13a via meter 14, and catalyst such as sulphuric or phosphoric acid via line 18a from tank 18. Columns 9a, 9b, 9n receive vapours from the boiling liquids in 13a, 13b, 13n, respectively. Methyl formate vapour <PICT:0628656/IV (b)/1> is fed to vessel 13n by fan 8 and passes through column 9n, and counter-current to the liquid in the hydrolyzing vessels. Vapours consisting primarily of methanol and methyl formate emerge from column 9a, and liquid which is primarily formic acid with a small proportion of water overflows from vessel 13n. This liquid passes to a column 16 where methanol and methyl formate present are separated and recirculated by fan 8, while formic acid is separated in heater 17 from catalyst, which is recycled by fan 19, and then fed to a column 21. An azeotropic mixture of formic acid and water collects at the base and is returned to the hydrolyzing vessels via emulsifier 20, while anhydrous acid condenses in coil 3, cooler 22, and tank 23. Vapours from column 9a pass to column 1 heated by the formic acid vapours fed to coil 3 and by a steam coil 2. Methanol collects at the base of column 1 while methyl formate vapours pass to fan 8 and tank 5. Substances such as benzene or heptane, which increase the coefficient of volatility of the alcohol, may be added to vessel 13n and are recovered in admixture with the alcohol. Pressures may be equal to or above or below atmospheric.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR628656X | 1946-01-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB628656A true GB628656A (en) | 1949-09-01 |
Family
ID=8989833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10930/47A Expired GB628656A (en) | 1946-01-29 | 1947-04-24 | Improvements in or relating to the hydrolysis of organic esters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB628656A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1035637B (en) * | 1956-04-04 | 1958-08-07 | Degussa | Process for the production of aqueous formic acid |
| CN110944971A (en) * | 2017-08-02 | 2020-03-31 | 伊士曼化工公司 | Method for producing formic acid using low-boiling formic acid ester |
-
1947
- 1947-04-24 GB GB10930/47A patent/GB628656A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1035637B (en) * | 1956-04-04 | 1958-08-07 | Degussa | Process for the production of aqueous formic acid |
| CN110944971A (en) * | 2017-08-02 | 2020-03-31 | 伊士曼化工公司 | Method for producing formic acid using low-boiling formic acid ester |
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