ES2012539A6 - Spent acid recycle in methacrylic acid or ester manufacture - Google Patents

Spent acid recycle in methacrylic acid or ester manufacture

Info

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
Application number
ES8802573A
Other languages
Spanish (es)
Inventor
Hayden Ivan Lipp
Ronald H Halliwell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of ES2012539A6 publication Critical patent/ES2012539A6/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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.
ES8802573A 1987-08-20 1988-08-18 Spent acid recycle in methacrylic acid or ester manufacture Expired - Lifetime ES2012539A6 (en)

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)

* Cited by examiner, † Cited by third party
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
ES2935290T3 (en) 2020-10-23 2023-03-03 Roehm Gmbh Optimized procedure for the preparation of alkyl methacrylate by reducing disturbing by-products
WO2022084274A1 (en) 2020-10-23 2022-04-28 Röhm Gmbh Optimized process for synthesizing methacrylic acid (maa) and/or alkyl methacrylate by reducing unwanted byproducts

Family Cites Families (6)

* Cited by examiner, † Cited by third party
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
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
GB815163A (en) * 1955-07-22 1959-06-17 Electro Chimie Metal Improvements relating to the manufacture of acrylic acids or 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

Also Published As

Publication number Publication date
GB2208864A (en) 1989-04-19
FR2619563B1 (en) 1994-04-01
GB8819764D0 (en) 1988-09-21
NL8802064A (en) 1989-03-16
JP2679819B2 (en) 1997-11-19
DE3828253C2 (en) 1999-10-28
GB2208864B (en) 1991-07-10
JPS6470433A (en) 1989-03-15
DE3828253A1 (en) 1989-03-02
CA1332424C (en) 1994-10-11
FR2619563A1 (en) 1989-02-24

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20020819