JPS55120578A - Production of maleic anhydride - Google Patents

Production of maleic anhydride

Info

Publication number
JPS55120578A
JPS55120578A JP2702879A JP2702879A JPS55120578A JP S55120578 A JPS55120578 A JP S55120578A JP 2702879 A JP2702879 A JP 2702879A JP 2702879 A JP2702879 A JP 2702879A JP S55120578 A JPS55120578 A JP S55120578A
Authority
JP
Japan
Prior art keywords
heating medium
column
maleic acid
over
spraying
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
JP2702879A
Other languages
Japanese (ja)
Other versions
JPS5931507B2 (en
Inventor
Masao Kasahara
Etsukazu Oshima
Kazuo Murase
Hitoshi Ugata
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 JP2702879A priority Critical patent/JPS5931507B2/en
Publication of JPS55120578A publication Critical patent/JPS55120578A/en
Publication of JPS5931507B2 publication Critical patent/JPS5931507B2/en
Expired legal-status Critical Current

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Abstract

PURPOSE: An aqueous maleic acid condensed at least to a specified concentration and kept over a specified temperature and a heating medium heated over a specified temperature are together sprayed into a spraying column to come into contact with each other, thus forming maleic anhydride in a short time and the liquid containing the heating medium is recycled from the bottom of the column for spraying.
CONSTITUTION: An aqueous maleic acid is concentrated with thin film evaporator A to a concentration over 80%, the steam is removed in cyclon B, then the maleic acid is kept over 100°C and supplied to spraying column C. A heating medium heated over 120°C is supplied from pipe 5 into spraying column to come into contact with the concentrate of aqueous maleic acid and the vapor of the objective compound and steam are obtained from pipe 6. The most part of the liquid from the column bottom, which contains the heating medium, is heated over 120°C with heater D and recycled to the spraying column C and the rest part is sent to the heating medium recycling system F to remove by-products. The heating medium used is, e.g., silicone oil or saturated aliphatic hydrocarbon of 15 or more carbon atoms.
EFFECT: The reaction time is short and the formation of fumaric acid is lowered. Further, the facility can be simplified.
COPYRIGHT: (C)1980,JPO&Japio
JP2702879A 1979-03-08 1979-03-08 Method for producing maleic anhydride Expired JPS5931507B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2702879A JPS5931507B2 (en) 1979-03-08 1979-03-08 Method for producing maleic anhydride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2702879A JPS5931507B2 (en) 1979-03-08 1979-03-08 Method for producing maleic anhydride

Publications (2)

Publication Number Publication Date
JPS55120578A true JPS55120578A (en) 1980-09-17
JPS5931507B2 JPS5931507B2 (en) 1984-08-02

Family

ID=12209609

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2702879A Expired JPS5931507B2 (en) 1979-03-08 1979-03-08 Method for producing maleic anhydride

Country Status (1)

Country Link
JP (1) JPS5931507B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003104980A (en) * 2001-09-28 2003-04-09 Nippon Shokubai Co Ltd Method for producing maleic anhydride

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003104980A (en) * 2001-09-28 2003-04-09 Nippon Shokubai Co Ltd Method for producing maleic anhydride

Also Published As

Publication number Publication date
JPS5931507B2 (en) 1984-08-02

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