JPS54141721A - Preparation of methacrylic acid - Google Patents

Preparation of methacrylic acid

Info

Publication number
JPS54141721A
JPS54141721A JP4848278A JP4848278A JPS54141721A JP S54141721 A JPS54141721 A JP S54141721A JP 4848278 A JP4848278 A JP 4848278A JP 4848278 A JP4848278 A JP 4848278A JP S54141721 A JPS54141721 A JP S54141721A
Authority
JP
Japan
Prior art keywords
methacrylic acid
methacrolein
absorbing
unreacted
oxidation
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.)
Granted
Application number
JP4848278A
Other languages
Japanese (ja)
Other versions
JPS6160061B2 (en
Inventor
Akihisa Yamamoto
Kinichi Okumura
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.)
Zeon Corp
Original Assignee
Nippon Zeon Co Ltd
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 Nippon Zeon Co Ltd filed Critical Nippon Zeon Co Ltd
Priority to JP4848278A priority Critical patent/JPS54141721A/en
Priority to GB7914215A priority patent/GB2024201B/en
Publication of JPS54141721A publication Critical patent/JPS54141721A/en
Publication of JPS6160061B2 publication Critical patent/JPS6160061B2/ja
Granted 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
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
    • C07C51/25—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
    • C07C51/252—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring of propene, butenes, acrolein or methacrolein

Abstract

PURPOSE: To prepare methacrylic acid in high conversion and yield, by catalytically oxidizing methacrolein in gas phase, separating the produced methacrylic acid by the counter-current contact with an absorption solvent under specific temperature condition, and oxidizing the unreacted methacrolein in the second oxidation stage.
CONSTITUTION: A mixture containing methacrylic acid, produced by the catalytic gas-phase oxidation of methacrolein with molecular oxygen and steam introduced into a reactor 2 through a pipe 1, is cooled and introduced into a methacrylic acid absorbing column 6. Absorbing solvent such as water, etc., is introduced into the absorbing column through pipes 7 and 8, and the above mixture is made contact countercurrently with the absorbing solvent under the top temperature of ≥ 60°C and the bottom temperature of ≥ 65°C. A solution containing methacrylic acid is obtained from the bottom. The unreacted methacrolein and steam are discharged from the top, and introduced to the second stage oxidation process 12 where the methacrolein is again oxidized in gas phase to methacrylic acid.
EFFECT: Separation and recovering processes of the unreacted methacrolein can be eliminated. Methacrylic acid can be effectively recovered.
COPYRIGHT: (C)1979,JPO&Japio
JP4848278A 1978-04-24 1978-04-24 Preparation of methacrylic acid Granted JPS54141721A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP4848278A JPS54141721A (en) 1978-04-24 1978-04-24 Preparation of methacrylic acid
GB7914215A GB2024201B (en) 1978-04-24 1979-04-24 Process for producing methacrylic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4848278A JPS54141721A (en) 1978-04-24 1978-04-24 Preparation of methacrylic acid

Publications (2)

Publication Number Publication Date
JPS54141721A true JPS54141721A (en) 1979-11-05
JPS6160061B2 JPS6160061B2 (en) 1986-12-19

Family

ID=12804597

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4848278A Granted JPS54141721A (en) 1978-04-24 1978-04-24 Preparation of methacrylic acid

Country Status (2)

Country Link
JP (1) JPS54141721A (en)
GB (1) GB2024201B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003238485A (en) * 2001-12-10 2003-08-27 Nippon Shokubai Co Ltd Method and equipment for collecting (meth)acrylic acid
WO2005051877A1 (en) * 2003-11-28 2005-06-09 Mitsubishi Chemical Corporation Method and apparatus for collecting (meth)acrolein or (meth)acrylic acid
JP2005179354A (en) * 2003-11-28 2005-07-07 Mitsubishi Chemicals Corp Method and apparatus for collecting (meth)acrolein or (meth)acrylic acid
JP2016145251A (en) * 2007-02-14 2016-08-12 サウディ ベーシック インダストリーズ コーポレイション Process for separating methacrolein from methacrylic acid in gas phase product from partial oxidation of isobutene

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3721865A1 (en) * 1987-07-02 1989-01-12 Basf Ag METHOD FOR PRODUCING METHACRYLIC ACID

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003238485A (en) * 2001-12-10 2003-08-27 Nippon Shokubai Co Ltd Method and equipment for collecting (meth)acrylic acid
WO2005051877A1 (en) * 2003-11-28 2005-06-09 Mitsubishi Chemical Corporation Method and apparatus for collecting (meth)acrolein or (meth)acrylic acid
JP2005179354A (en) * 2003-11-28 2005-07-07 Mitsubishi Chemicals Corp Method and apparatus for collecting (meth)acrolein or (meth)acrylic acid
US7786323B2 (en) 2003-11-28 2010-08-31 Mitsubishi Chemical Corporation Method for collecting (meth)acrolein or (meth)acrylic acid and collecting device for the same
JP2016145251A (en) * 2007-02-14 2016-08-12 サウディ ベーシック インダストリーズ コーポレイション Process for separating methacrolein from methacrylic acid in gas phase product from partial oxidation of isobutene

Also Published As

Publication number Publication date
JPS6160061B2 (en) 1986-12-19
GB2024201B (en) 1982-09-02
GB2024201A (en) 1980-01-09

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