BG98708A - Метод за получаване на диметилов естерна 4,4'- бифенилдикарбонова киселина - Google Patents

Метод за получаване на диметилов естерна 4,4'- бифенилдикарбонова киселина Download PDF

Info

Publication number
BG98708A
BG98708A BG98708A BG9870894A BG98708A BG 98708 A BG98708 A BG 98708A BG 98708 A BG98708 A BG 98708A BG 9870894 A BG9870894 A BG 9870894A BG 98708 A BG98708 A BG 98708A
Authority
BG
Bulgaria
Prior art keywords
dimethyl ester
temperature
acid dimethyl
biphenyldicarboxylic acid
distillate
Prior art date
Application number
BG98708A
Other languages
Bulgarian (bg)
English (en)
Inventor
Michael Frey
Ulrich Hkrtenstein
Rainer Schaller
Original Assignee
Hoechst Ag
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 Hoechst Ag filed Critical Hoechst Ag
Publication of BG98708A publication Critical patent/BG98708A/bg

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00—Preparation of carboxylic acid esters
    • C07C67/48—Separation; Purification; Stabilisation; Use of additives
    • C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00—Preparation of carboxylic acid esters
    • C07C67/48—Separation; Purification; Stabilisation; Use of additives
    • C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
    • C07C67/54—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S203/00—Distillation: processes, separatory
    • Y10S203/17—Saline water conversion

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
BG98708A 1993-04-16 1994-04-11 Метод за получаване на диметилов естерна 4,4'- бифенилдикарбонова киселина BG98708A (bg)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4312491A DE4312491A1 (de) 1993-04-16 1993-04-16 Gewinnung von 4,4'-Biphenyl-dicarbonsäure-dimethylester

Publications (1)

Publication Number Publication Date
BG98708A true BG98708A (bg) 1995-05-31

Family

ID=6485644

Family Applications (1)

Application Number Title Priority Date Filing Date
BG98708A BG98708A (bg) 1993-04-16 1994-04-11 Метод за получаване на диметилов естерна 4,4'- бифенилдикарбонова киселина

Country Status (9)

Country Link
US (1) US5397440A (zh)
EP (1) EP0620207B1 (zh)
JP (1) JPH072739A (zh)
CN (1) CN1104204A (zh)
BG (1) BG98708A (zh)
BR (1) BR9401488A (zh)
DE (2) DE4312491A1 (zh)
RO (1) RO112849B1 (zh)
SK (1) SK42394A3 (zh)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142858B (de) * 1961-07-19 1963-01-31 Witten Gmbh Chem Werke Verfahren zur Gewinnung von Diphenylpolycarbonsaeuremethylestern
US3227153A (en) * 1963-09-04 1966-01-04 American Mach & Foundry Solar collector
JPS522896B2 (zh) * 1973-01-18 1977-01-25
DE3430555A1 (de) * 1984-08-20 1986-02-27 Hoechst Ag, 6230 Frankfurt Verfahren zur abtrennung von dimethylisophthalat und dimethylorthophthalat aus ihrem gemisch mit dimethylterephthalat
PT96056A (pt) * 1989-12-02 1991-09-13 Hoechst Ag Processo para a purificacao de tereftalato de dimetilo
JPH04266851A (ja) * 1991-02-21 1992-09-22 Mitsui Petrochem Ind Ltd 芳香族ジカルボン酸ジフェニルエステルの精製方法

Also Published As

Publication number Publication date
DE59403696D1 (de) 1997-09-18
BR9401488A (pt) 1994-10-25
EP0620207A1 (de) 1994-10-19
SK42394A3 (en) 1995-02-08
DE4312491A1 (de) 1994-10-20
RO112849B1 (ro) 1998-01-30
CN1104204A (zh) 1995-06-28
US5397440A (en) 1995-03-14
JPH072739A (ja) 1995-01-06
EP0620207B1 (de) 1997-08-13

Similar Documents

Publication Publication Date Title
US3457280A (en) Alpha-glycolide and methods for the isolation thereof
US3236899A (en) Treatment of 2, 2, 4, 4-tetraalkyl-1, 3-cyclobutanediols
US3073868A (en) Production and purification of diphenylolalkanes
US2811548A (en) Method of purifying aromatic dicarboxylic acids
US5136052A (en) Process for the manufacture of n-phenylmaleimide
DE69208208T2 (de) Verfahren zur herstellung von gereinigtem naphthalendikarbonsäuredimethylester
US5254719A (en) Process for preparing purified dimethyl naphthalenedicarboxylate
KR800001084B1 (ko) 고순도 테레프탈산의 제조방법
US5196596A (en) Higher aldehyde separation process
US4049721A (en) Purification of crude 9,9-bis-(4-hydroxyphenyl)-fluorene
US3207795A (en) Production and purification of diphenylolalkanes
US3277153A (en) Process for the isolation of diphenyl carboxylic acid methyl esters
US7417108B2 (en) Process for production of 2,3,3′,4′-biphenyltetracarboxylic dianhydride
US4948921A (en) Process for the production and recovery of trimellitic acid
BG98708A (bg) Метод за получаване на диметилов естерна 4,4'- бифенилдикарбонова киселина
US3359281A (en) Separation and isolation of 2, 2, (2, 4'-dihydroxydiphenyl) propane and 2, 2, 4-trimethyl 4(4'-hydroxyphenyl) chroman from mixtures containing the same
US4916257A (en) Process for the purification of 2-hydroxynaphthalene-6-carboxylic acid
US2894021A (en) Process for purification of dimethyl terephtalate
US3037048A (en) Process for the purification of crude dimethyl terephthalate
CA1268779A (en) Isolation process
US2857429A (en) Process for recovering pure phthalic acids
US3004067A (en) Separation of aromatic
US5840970A (en) Process for the purification of naphthalenedicarboxylic acid
US5801269A (en) Processes for cystallizing 4, 4'-dimethyl bibenzoate (DMBB) recovered from polyester byproduct streams
US3108132A (en) Purification of dmt by filtration