GB2175897A - Process for preparing tetramethyl biphenyltetracarboxylate - Google Patents

Process for preparing tetramethyl biphenyltetracarboxylate

Info

Publication number
GB2175897A
GB2175897A GB08608582A GB8608582A GB2175897A GB 2175897 A GB2175897 A GB 2175897A GB 08608582 A GB08608582 A GB 08608582A GB 8608582 A GB8608582 A GB 8608582A GB 2175897 A GB2175897 A GB 2175897A
Authority
GB
United Kingdom
Prior art keywords
biphenyltetracarboxylate
distillate
tetramethyl
dimethyl phthalate
preparing tetramethyl
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
GB08608582A
Other versions
GB8608582D0 (en
GB2175897B (en
Inventor
Takeuchi Tsutomu
Kitai Mitsumasa
Katsuro Yoshio
Nakano Kunihiro
Hino Masumi
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
Priority claimed from JP16975984A external-priority patent/JPS6147444A/en
Priority claimed from JP59193497A external-priority patent/JPS6169746A/en
Application filed by Mitsubishi Kasei Corp filed Critical Mitsubishi Kasei Corp
Publication of GB8608582D0 publication Critical patent/GB8608582D0/en
Publication of GB2175897A publication Critical patent/GB2175897A/en
Application granted granted Critical
Publication of GB2175897B publication Critical patent/GB2175897B/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
    • C07C69/76—Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

A process for preparaing tetramethyl biphenyltetracarboxylate, which comprises subjecting dimethyl phthalate to dehydrodimerization in the presence of oxygen using a palladium-containing catalyst, distilling the reaction product, recovering a residue containing tetramethyl biphenyletracarboxylate, and re-using the distillate containing unreacted dimethyl phthalate as the starting material, wherein the distillate is purified before the re-use with an alkaline aqueous solution etc. to reduce the content of phthalic acid and/or phthalic anhydride to 1,000 ppm or less.
GB08608582A 1984-08-14 1985-08-09 Process for preparing tetramethyl biphenyltetracarboxylate Expired GB2175897B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP16975984A JPS6147444A (en) 1984-08-14 1984-08-14 Method for purifying crude dimethyl phthalate
JP59193497A JPS6169746A (en) 1984-09-14 1984-09-14 Production of tetramethyl biphenyltetracarboxylate
PCT/JP1985/000447 WO1986001200A1 (en) 1984-08-14 1985-08-09 Process for preparaing tetramethyl biphenyltetracarboxylate

Publications (3)

Publication Number Publication Date
GB8608582D0 GB8608582D0 (en) 1986-05-14
GB2175897A true GB2175897A (en) 1986-12-10
GB2175897B GB2175897B (en) 1987-12-16

Family

ID=26492997

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08608582A Expired GB2175897B (en) 1984-08-14 1985-08-09 Process for preparing tetramethyl biphenyltetracarboxylate

Country Status (3)

Country Link
DE (1) DE3590385T1 (en)
GB (1) GB2175897B (en)
WO (1) WO1986001200A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4868538A (en) * 1971-12-22 1973-09-18
DE2504156A1 (en) * 1975-02-01 1976-08-05 Dynamit Nobel Ag LOW MOLECULAR MOLECULAR TEREPHTHAL ACID AETHYLENE GLYCOLESTER, THEIR PREPARATION AND USE
DE2504258A1 (en) * 1975-02-01 1976-08-05 Dynamit Nobel Ag PROCESS AND APPARATUS FOR THE MANUFACTURING OF OLIGOMERIC ALKYLENE TEREPHTHALATES
JPS5287113A (en) * 1976-01-13 1977-07-20 Mitsubishi Gas Chem Co Inc Production of ester

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
JP A 48-68538 *
JP A 51-101945 *
JP A 51-101946 *
JP A 52-87113 *

Also Published As

Publication number Publication date
WO1986001200A1 (en) 1986-02-27
DE3590385T1 (en) 1986-08-28
GB8608582D0 (en) 1986-05-14
GB2175897B (en) 1987-12-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee