JPS55122738A - Preparation of oxy-di-phtalic acid and acid anhydride - Google Patents

Preparation of oxy-di-phtalic acid and acid anhydride

Info

Publication number
JPS55122738A
JPS55122738A JP2934879A JP2934879A JPS55122738A JP S55122738 A JPS55122738 A JP S55122738A JP 2934879 A JP2934879 A JP 2934879A JP 2934879 A JP2934879 A JP 2934879A JP S55122738 A JPS55122738 A JP S55122738A
Authority
JP
Japan
Prior art keywords
phthalic acid
acid
nonproton
anhydride
polar solvent
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
JP2934879A
Other languages
Japanese (ja)
Inventor
Tadamitsu Kiyoura
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
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 Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP2934879A priority Critical patent/JPS55122738A/en
Publication of JPS55122738A publication Critical patent/JPS55122738A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain the title compound industrially economically with ease useful as a modifier for various kinds of resins, a raw material of heat-resistant polyimide resin, by reacting phthalic acid replaced by a halogen as a raw material with a caustic alkali in a nonproton polar solvent.
CONSTITUTION: A phthalic acid or phthalic anhydride replaced by a halogen at 4-position, e.g., 4-iodinated-phthalic acid, 4-bromo-phthalic anhydride, is reacted with a caustic alkali, e.g., NaOH, in a nonproton polar solvent at 50W200°C, preferably at 90W150°C to give 4, 4'-oxy-di-phthalic acid or acid anhydride. Dimethyl sulfoxide, N,N-dimethylformamide, etc. is used as the nonproton polar solvent. The molar ratio of the phthalic acid replaced at 4-position to the cautic alkali can be varied in a wide range, but the vicinity of the molar ratio of 1/2 is advantageous in respect to yields.
COPYRIGHT: (C)1980,JPO&Japio
JP2934879A 1979-03-15 1979-03-15 Preparation of oxy-di-phtalic acid and acid anhydride Pending JPS55122738A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2934879A JPS55122738A (en) 1979-03-15 1979-03-15 Preparation of oxy-di-phtalic acid and acid anhydride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2934879A JPS55122738A (en) 1979-03-15 1979-03-15 Preparation of oxy-di-phtalic acid and acid anhydride

Publications (1)

Publication Number Publication Date
JPS55122738A true JPS55122738A (en) 1980-09-20

Family

ID=12273711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2934879A Pending JPS55122738A (en) 1979-03-15 1979-03-15 Preparation of oxy-di-phtalic acid and acid anhydride

Country Status (1)

Country Link
JP (1) JPS55122738A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4697023A (en) * 1986-10-03 1987-09-29 Occidental Chemical Corporation Process for the preparation of oxy-diphthalic anhydrides
US4780544A (en) * 1986-07-02 1988-10-25 General Electric Company Method for making oxybisphthalimides
US4808731A (en) * 1988-03-04 1989-02-28 General Electric Company Method for making oxydiphthalic anhydride
EP0416602A2 (en) * 1989-09-08 1991-03-13 Bromine Compounds Ltd. Bis(4-halo-phthalic acid)quarter salts, process for their preparation and their use
GB2280183A (en) * 1993-07-20 1995-01-25 Kobe Steel Europ Ltd Production of polyetherimides
WO1998027047A1 (en) * 1996-12-19 1998-06-25 Bromine Compounds Ltd. Process for the preparation of 4,4'-oxybisphthalic dianhydride
WO2006062137A1 (en) * 2004-12-07 2006-06-15 Mitsubishi Chemical Corporation High-purity oxydiphthalic acid anhydride and process for producing the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4780544A (en) * 1986-07-02 1988-10-25 General Electric Company Method for making oxybisphthalimides
US4697023A (en) * 1986-10-03 1987-09-29 Occidental Chemical Corporation Process for the preparation of oxy-diphthalic anhydrides
US4808731A (en) * 1988-03-04 1989-02-28 General Electric Company Method for making oxydiphthalic anhydride
EP0416602A2 (en) * 1989-09-08 1991-03-13 Bromine Compounds Ltd. Bis(4-halo-phthalic acid)quarter salts, process for their preparation and their use
EP0416602B1 (en) * 1989-09-08 1995-03-29 Bromine Compounds Ltd. Bis(4-halo-phthalic acid)quarter salts, process for their preparation and their use
GB2280183A (en) * 1993-07-20 1995-01-25 Kobe Steel Europ Ltd Production of polyetherimides
WO1998027047A1 (en) * 1996-12-19 1998-06-25 Bromine Compounds Ltd. Process for the preparation of 4,4'-oxybisphthalic dianhydride
WO2006062137A1 (en) * 2004-12-07 2006-06-15 Mitsubishi Chemical Corporation High-purity oxydiphthalic acid anhydride and process for producing the same

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