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JPS646233A - Purification of methacrylic acid - Google Patents

Purification of methacrylic acid

Info

Publication number
JPS646233A
JPS646233A JP15882687A JP15882687A JPS646233A JP S646233 A JPS646233 A JP S646233A JP 15882687 A JP15882687 A JP 15882687A JP 15882687 A JP15882687 A JP 15882687A JP S646233 A JPS646233 A JP S646233A
Authority
JP
Japan
Prior art keywords
methacrylic acid
solvent
extracting
water
heptane
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.)
Pending
Application number
JP15882687A
Other languages
Japanese (ja)
Inventor
Morimasa Kuragano
Yutaka Hayashida
Minoru Koshibe
Tooru Mikekado
Hirozo Segawa
Katsuji Yoguchi
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.)
Kyowa Gas Chemical Industry Co Ltd
Mitsui Toatsu Chemicals Inc
Original Assignee
Kyowa Gas Chemical Industry Co Ltd
Mitsui Toatsu Chemicals Inc
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 Kyowa Gas Chemical Industry Co Ltd, Mitsui Toatsu Chemicals Inc filed Critical Kyowa Gas Chemical Industry Co Ltd
Priority to JP15882687A priority Critical patent/JPS646233A/en
Publication of JPS646233A publication Critical patent/JPS646233A/en
Pending legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE:To purify methacrylic acid in high efficiency, by removing low-boiling substances from an aqueous solution of methacrylic acid by distillation, etc., obtained by oxidizing isobutylene with O2, extracting methacrylic acid with heptane, etc., recovering a solvent from the extracted solution, washing the solvent with water, recycling and using the solvent. CONSTITUTION:In reacting isobutylene, tertiary butanol, isobutyl aldehyde or methacrolein with an O2-containing gas in the presence of a catalyst in a gas phase, quenching the reaction product, distilling or evaporating the prepared aqueous solution of methacrylic acid to remove low-boiling substances and extracting methacrylic acid in counter current with one or a mixture of two or more of heptane, octane, toluene and xylene as an extracting solvent to purity methacrylic acid, the solvent distilled and recovered after the extraction is washed with water (preferably deionized water), recycled and used. Methacrylic acid can be purified in high efficiently with an extremely few troubles, the solvent readily selected and extraction ratio can be improved.
JP15882687A 1987-06-27 1987-06-27 Purification of methacrylic acid Pending JPS646233A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15882687A JPS646233A (en) 1987-06-27 1987-06-27 Purification of methacrylic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15882687A JPS646233A (en) 1987-06-27 1987-06-27 Purification of methacrylic acid

Publications (1)

Publication Number Publication Date
JPS646233A true JPS646233A (en) 1989-01-10

Family

ID=15680225

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15882687A Pending JPS646233A (en) 1987-06-27 1987-06-27 Purification of methacrylic acid

Country Status (1)

Country Link
JP (1) JPS646233A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2085376A1 (en) 2008-01-30 2009-08-05 Evonik Röhm GmbH Process for preparation of high purity methacrylic acid
JP2009242285A (en) * 2008-03-31 2009-10-22 Mitsubishi Chemicals Corp Method for producing acrylic acid
WO2013164216A1 (en) 2012-05-03 2013-11-07 Evonik Industries Ag Process for preparation of highly pure, non-yellowing (meth)acrylic acid
WO2014146961A1 (en) 2013-03-18 2014-09-25 Evonik Industries Ag Process for preparation of methacrylic acid and methacrylic acid esters

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6296447A (en) * 1985-10-24 1987-05-02 Nippon Kayaku Co Ltd Recovery of methacrylic acid

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6296447A (en) * 1985-10-24 1987-05-02 Nippon Kayaku Co Ltd Recovery of methacrylic acid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2085376A1 (en) 2008-01-30 2009-08-05 Evonik Röhm GmbH Process for preparation of high purity methacrylic acid
JP2009242285A (en) * 2008-03-31 2009-10-22 Mitsubishi Chemicals Corp Method for producing acrylic acid
WO2013164216A1 (en) 2012-05-03 2013-11-07 Evonik Industries Ag Process for preparation of highly pure, non-yellowing (meth)acrylic acid
WO2014146961A1 (en) 2013-03-18 2014-09-25 Evonik Industries Ag Process for preparation of methacrylic acid and methacrylic acid esters

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