JPS56122327A - Preparation of methacrylic acid - Google Patents

Preparation of methacrylic acid

Info

Publication number
JPS56122327A
JPS56122327A JP2640580A JP2640580A JPS56122327A JP S56122327 A JPS56122327 A JP S56122327A JP 2640580 A JP2640580 A JP 2640580A JP 2640580 A JP2640580 A JP 2640580A JP S56122327 A JPS56122327 A JP S56122327A
Authority
JP
Japan
Prior art keywords
methacrylic acid
scrubber
heat
reaction
inlet
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
JP2640580A
Other languages
Japanese (ja)
Inventor
Tatsuro Masuko
Shigeo Fukaya
Yasuo Takeuchi
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.)
Mitsubishi Kasei Corp
Original Assignee
Mitsubishi Kasei Corp
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 Mitsubishi Kasei Corp filed Critical Mitsubishi Kasei Corp
Priority to JP2640580A priority Critical patent/JPS56122327A/en
Publication of JPS56122327A publication Critical patent/JPS56122327A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • Y02P20/10—Process efficiency

Landscapes

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

Abstract

PURPOSE: To collect liquid methacrylic acid industrially and advantageously, by recovering heat from a reaction gas containing methacrylic acid formed through the vapor phase oxidation reaction in a heat exchanger, and keeping the reaction gas temperature at the scrubber inlet at a specific value or above.
CONSTITUTION: Methacrylic acid is formed in an oxidizing and dehydrogenating reactor 1 by the isobutyric acid, isobutyraldehyde, isobutylene or methacrolein method, and the heat is recovered by a heat exchanger 2 to keep the gas temperature at the inlet of a scrubber 3 at 130°C or above, preferably 140°C or above but not higher than the reaction temperature, more preferably 160W200°C, and further cooled to collect the liquid methacrylic acid. A polymerization inhibitor, e.g. hydroquinone, may be added to the collected methacrylic acid to prevent the polymerization thereof.
EFFECT: The method described above is industrial and advantageous from the viewpoint of load on the scrubber, heat loss, prevention of pipe clogging, etc.
COPYRIGHT: (C)1981,JPO&Japio
JP2640580A 1980-03-03 1980-03-03 Preparation of methacrylic acid Pending JPS56122327A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2640580A JPS56122327A (en) 1980-03-03 1980-03-03 Preparation of methacrylic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2640580A JPS56122327A (en) 1980-03-03 1980-03-03 Preparation of methacrylic acid

Publications (1)

Publication Number Publication Date
JPS56122327A true JPS56122327A (en) 1981-09-25

Family

ID=12192635

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2640580A Pending JPS56122327A (en) 1980-03-03 1980-03-03 Preparation of methacrylic acid

Country Status (1)

Country Link
JP (1) JPS56122327A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0297788A2 (en) * 1987-06-27 1989-01-04 MITSUI TOATSU CHEMICALS, Inc. Process of quenching reaction product gas containing methacrylic acid and method of treating quenched liquid
JP2003238485A (en) * 2001-12-10 2003-08-27 Nippon Shokubai Co Ltd Method and equipment for collecting (meth)acrylic acid
US6787001B2 (en) * 2001-03-21 2004-09-07 Nippon Shokubai Co. Ltd. Method for distilling (meth) acrylic acid solution

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0297788A2 (en) * 1987-06-27 1989-01-04 MITSUI TOATSU CHEMICALS, Inc. Process of quenching reaction product gas containing methacrylic acid and method of treating quenched liquid
US4987252A (en) * 1987-06-27 1991-01-22 Mitsui Toatsu Chemicals, Incorporated Quenching process of reaction product gas containing methacrylic acid and treatment method of quenched liquid
US6787001B2 (en) * 2001-03-21 2004-09-07 Nippon Shokubai Co. Ltd. Method for distilling (meth) acrylic acid solution
JP2003238485A (en) * 2001-12-10 2003-08-27 Nippon Shokubai Co Ltd Method and equipment for collecting (meth)acrylic acid

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