JPS54115317A - Preparation of acrylic acid or methacrylic acid - Google Patents

Preparation of acrylic acid or methacrylic acid

Info

Publication number
JPS54115317A
JPS54115317A JP2039878A JP2039878A JPS54115317A JP S54115317 A JPS54115317 A JP S54115317A JP 2039878 A JP2039878 A JP 2039878A JP 2039878 A JP2039878 A JP 2039878A JP S54115317 A JPS54115317 A JP S54115317A
Authority
JP
Japan
Prior art keywords
acrylic acid
methacrylic acid
acid
ammonium salt
water
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
JP2039878A
Other languages
Japanese (ja)
Other versions
JPS612055B2 (en
Inventor
Masaya Kametani
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.)
Nitto Chemical Industry Co Ltd
Original Assignee
Nitto Chemical Industry 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 Nitto Chemical Industry Co Ltd filed Critical Nitto Chemical Industry Co Ltd
Priority to JP2039878A priority Critical patent/JPS54115317A/en
Publication of JPS54115317A publication Critical patent/JPS54115317A/en
Publication of JPS612055B2 publication Critical patent/JPS612055B2/ja
Granted legal-status Critical Current

Links

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

Abstract

PURPOSE: To prepare an acrylic acid or methacrylic acid, of polymer grade from an aqueous solution of ammonium salt of acrylic acid or methacrylic acid, by the azeotropic distillation of the solution under mild conditions, thereby removing water and NH3 from the solution without side reactions.
CONSTITUTION: An inert organic solvent which forms an azeotropic mixture having a b.p. of 60W100°C with water (hydrocarbons, e.g. toluene, xylene, etc,; chlorinated hydrocarbons, e.g. chlorobenzene; ketones, e.g. methyl ethyl ketone; esters, e.g. propyl acetate; etc.) is added to an aqueous solution of ammonium salt of acrylic acid or methacrylic acid. The mixture is azeotropically distilled to remove water and NH3 leaving acrylic acid or methacrylic acid.
COPYRIGHT: (C)1979,JPO&Japio
JP2039878A 1978-02-25 1978-02-25 Preparation of acrylic acid or methacrylic acid Granted JPS54115317A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2039878A JPS54115317A (en) 1978-02-25 1978-02-25 Preparation of acrylic acid or methacrylic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2039878A JPS54115317A (en) 1978-02-25 1978-02-25 Preparation of acrylic acid or methacrylic acid

Publications (2)

Publication Number Publication Date
JPS54115317A true JPS54115317A (en) 1979-09-07
JPS612055B2 JPS612055B2 (en) 1986-01-22

Family

ID=12025905

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2039878A Granted JPS54115317A (en) 1978-02-25 1978-02-25 Preparation of acrylic acid or methacrylic acid

Country Status (1)

Country Link
JP (1) JPS54115317A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4599144A (en) * 1984-06-25 1986-07-08 Standard Oil Company (Indiana) Process for recovery of methacrylic acid
WO1997030962A1 (en) * 1996-02-26 1997-08-28 Nippon Soda Co., Ltd. PROCESS FOR PREPARING FREE α-HYDROXY ACIDS FROM AMMONIUM SALTS THEREOF
CN1321968C (en) * 2003-04-09 2007-06-20 上海华谊丙烯酸有限公司 Method for purifying acrylic acid b utilizing azeotropic rectification
DE102009009580A1 (en) 2009-02-19 2010-08-26 Evonik Degussa Gmbh Process for the preparation of free acids from their salts
WO2010094630A1 (en) 2009-02-19 2010-08-26 Evonik Degussa Gmbh Reactive extraction of free organic acids from ammonium salts thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7933798A (en) * 1997-06-26 1999-01-19 Nippon Soda Co., Ltd. Process for producing free acids from ammonium carboxylates

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4599144A (en) * 1984-06-25 1986-07-08 Standard Oil Company (Indiana) Process for recovery of methacrylic acid
WO1997030962A1 (en) * 1996-02-26 1997-08-28 Nippon Soda Co., Ltd. PROCESS FOR PREPARING FREE α-HYDROXY ACIDS FROM AMMONIUM SALTS THEREOF
US6066763A (en) * 1996-02-26 2000-05-23 Nippon Soda Co., Ltd. Process for preparing free α-hydroxy acids from ammonium salts thereof
CN1085195C (en) * 1996-02-26 2002-05-22 日本曹达株式会社 Process for preparing free 'alpha'-hydroxy acids from ammonium salts thereof
CN1321968C (en) * 2003-04-09 2007-06-20 上海华谊丙烯酸有限公司 Method for purifying acrylic acid b utilizing azeotropic rectification
DE102009009580A1 (en) 2009-02-19 2010-08-26 Evonik Degussa Gmbh Process for the preparation of free acids from their salts
WO2010094630A1 (en) 2009-02-19 2010-08-26 Evonik Degussa Gmbh Reactive extraction of free organic acids from ammonium salts thereof
WO2010094554A1 (en) 2009-02-19 2010-08-26 Evonik Degussa Gmbh Method for producing a free acid from the salt thereof
DE102009001008A1 (en) 2009-02-19 2010-08-26 Evonik Degussa Gmbh Reactive extraction of free organic acids from their ammonium salts

Also Published As

Publication number Publication date
JPS612055B2 (en) 1986-01-22

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