ES2012539A6 - Spent acid recycle in methacrylic acid or ester manufacture - Google Patents
Spent acid recycle in methacrylic acid or ester manufactureInfo
- Publication number
- ES2012539A6 ES2012539A6 ES8802573A ES8802573A ES2012539A6 ES 2012539 A6 ES2012539 A6 ES 2012539A6 ES 8802573 A ES8802573 A ES 8802573A ES 8802573 A ES8802573 A ES 8802573A ES 2012539 A6 ES2012539 A6 ES 2012539A6
- Authority
- ES
- Spain
- Prior art keywords
- acid
- methacrylic acid
- recycle
- ester manufacture
- spent
- 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 - Lifetime
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
- C07C51/06—Preparation of carboxylic acids or their salts, halides or anhydrides from carboxylic acid amides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C231/00—Preparation of carboxylic acid amides
- C07C231/06—Preparation of carboxylic acid amides from nitriles by transformation of cyano groups into carboxamide groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/18—Preparation of carboxylic acid esters by conversion of a group containing nitrogen into an ester group
- C07C67/20—Preparation of carboxylic acid esters by conversion of a group containing nitrogen into an ester group from amides or lactams
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
Improvement of yield and reduction in virgin sulfuric acid needs in methacrylamide formation from acetone cyanohydrin during the two-stage preparation of methacrylic acid or its alkyl esters by recycling spent acid either as produced or after its water content has been reduced.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8751487A | 1987-08-20 | 1987-08-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2012539A6 true ES2012539A6 (en) | 1990-04-01 |
Family
ID=22205641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES8802573A Expired - Lifetime ES2012539A6 (en) | 1987-08-20 | 1988-08-18 | Spent acid recycle in methacrylic acid or ester manufacture |
Country Status (7)
Country | Link |
---|---|
JP (1) | JP2679819B2 (en) |
CA (1) | CA1332424C (en) |
DE (1) | DE3828253C2 (en) |
ES (1) | ES2012539A6 (en) |
FR (1) | FR2619563B1 (en) |
GB (1) | GB2208864B (en) |
NL (1) | NL8802064A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5393918A (en) * | 1993-12-02 | 1995-02-28 | Rohm And Haas Company | High yield process for the production of methacrylic acid esters |
ZA200303241B (en) * | 2002-05-01 | 2003-11-04 | Rohm & Haas | Improved process for methacrylic acid and methcrylic acid ester production. |
DE102006058250A1 (en) * | 2006-12-08 | 2008-06-12 | Evonik Röhm Gmbh | Integrated process and apparatus for producing methacrylic acid esters from acetone and hydrocyanic acid |
DE102006060161A1 (en) * | 2006-12-18 | 2008-06-26 | Evonik Röhm Gmbh | Process for the adsorptive purification of alkyl methacrylates |
CN103130671B (en) * | 2013-03-28 | 2015-06-17 | 重庆紫光化工股份有限公司 | Preparation and purification method of clean methacrylamide |
EP4045479B1 (en) | 2020-10-23 | 2022-10-26 | Röhm GmbH | Optimized method for producing alkyl methacrylate by reducing interfering by-products |
JP2023547392A (en) | 2020-10-23 | 2023-11-10 | レーム・ゲーエムベーハー | Optimized production method for methacrylic acid (MAS) and/or alkyl methacrylates with reduction of unnecessary by-products |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2042458A (en) * | 1933-10-31 | 1936-06-02 | Ici Ltd | Production of esters of methacrylic acid |
US2416756A (en) * | 1941-10-23 | 1947-03-04 | Du Pont | Continuous production of esters of methacrylic acid |
GB815163A (en) * | 1955-07-22 | 1959-06-17 | Electro Chimie Metal | Improvements relating to the manufacture of acrylic acids or esters |
US2890101A (en) * | 1955-07-22 | 1959-06-09 | Electro Chimie Metal | Recovery of ammonium bisulphate from the distillation residues from the manufacture of acrylic acids and their esters |
DE1468419A1 (en) * | 1964-09-23 | 1969-05-29 | Nitrokemia Ipartelepek | Process for the production of methyl methacrylate |
FR2406623A1 (en) * | 1977-10-24 | 1979-05-18 | Chemie Linz Ag | PROCESS FOR THE PREPARATION OF MONO- OR DICARBOXYLIC ACID ESTERS BY REACTION OF CARBOXYLIC ACID AMIDS WITH ALCOHOLS, SULFURIC ACID OR AMMONIUM BISULPHATE |
-
1988
- 1988-08-18 ES ES8802573A patent/ES2012539A6/en not_active Expired - Lifetime
- 1988-08-18 CA CA 575132 patent/CA1332424C/en not_active Expired - Fee Related
- 1988-08-19 NL NL8802064A patent/NL8802064A/en not_active Application Discontinuation
- 1988-08-19 GB GB8819764A patent/GB2208864B/en not_active Expired - Lifetime
- 1988-08-19 JP JP63204894A patent/JP2679819B2/en not_active Expired - Lifetime
- 1988-08-19 DE DE19883828253 patent/DE3828253C2/en not_active Expired - Fee Related
- 1988-08-19 FR FR8811028A patent/FR2619563B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
GB2208864A (en) | 1989-04-19 |
GB2208864B (en) | 1991-07-10 |
FR2619563A1 (en) | 1989-02-24 |
FR2619563B1 (en) | 1994-04-01 |
DE3828253A1 (en) | 1989-03-02 |
JP2679819B2 (en) | 1997-11-19 |
NL8802064A (en) | 1989-03-16 |
DE3828253C2 (en) | 1999-10-28 |
JPS6470433A (en) | 1989-03-15 |
GB8819764D0 (en) | 1988-09-21 |
CA1332424C (en) | 1994-10-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 20020819 |