RO79997B - Procedeu de oxidare a amestecurilor cu continut de paraxilen si/sau ester metilic al acidului paratoluilic - Google Patents

Procedeu de oxidare a amestecurilor cu continut de paraxilen si/sau ester metilic al acidului paratoluilic

Info

Publication number
RO79997B
RO79997B RO101387A RO10138780A RO79997B RO 79997 B RO79997 B RO 79997B RO 101387 A RO101387 A RO 101387A RO 10138780 A RO10138780 A RO 10138780A RO 79997 B RO79997 B RO 79997B
Authority
RO
Romania
Prior art keywords
catalyst
paratolloluic
paraxylene
acid
oxidizing mixtures
Prior art date
Application number
RO101387A
Other languages
English (en)
Other versions
RO79997A (ro
Inventor
Heinrich Bunger
Rudolf Cordes
Gerhart Hoffmann
Original Assignee
Dynamit Nobel Aktiengesellschaft
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 Dynamit Nobel Aktiengesellschaft filed Critical Dynamit Nobel Aktiengesellschaft
Publication of RO79997B publication Critical patent/RO79997B/ro
Publication of RO79997A publication Critical patent/RO79997A/ro

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
    • C07C67/58—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00—Preparation of carboxylic acid esters
    • C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
    • 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
    • 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
    • C07C67/56—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/584—Recycling of catalysts

Landscapes

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

Abstract

Procedeul de oxidare a amestecurilor continînd p-xilen si/sau ester metilic al acidului p-toluilic, cu oxigen sau cu cu un gaz ce contine oxigen la temperaturi si presiuni ridicate în prezenta de catalizator format din cobalt si mangan, tratarea amestecului de reactie cu metanol, separarea esterului prin distilare si prelucrarea rezidului de distilare cu punctul de fierbere ridicat, caracterizat prin aceea ca, oxidarea se realizeaza în prezenta de 73...80 ppm catalizator, iar reziduul la distilare este supus extractiei la temperatura de circa 95 degree C cu apa si/sau solutiei apoase de alcool inferior sau acizi monocarboxilici inferiori, astfel încît sa rezulte un extract în care raportul în greutate acid trimetilic plus esterul metilic al acidului trimetilic fata de catalizator este de cel mult 1,8:1, iar extractul este recirculat la faza de oxidare, eventual dupa concentrare.
RO80101387A 1979-06-12 1980-06-11 Procedeu de oxidare a amestecurilor cu continut de paraxilen si/sau ester metilic al acidului paratoluic RO79997A (ro)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2923681A DE2923681C2 (de) 1979-06-12 1979-06-12 Verfahren zur Gewinnung und Wiederverwendung von Schwermetalloxidationskatalysator aus dem Wittem-DMT-Prozeß

Publications (2)

Publication Number Publication Date
RO79997B true RO79997B (ro) 1983-01-30
RO79997A RO79997A (ro) 1983-02-01

Family

ID=6073015

Family Applications (1)

Application Number Title Priority Date Filing Date
RO80101387A RO79997A (ro) 1979-06-12 1980-06-11 Procedeu de oxidare a amestecurilor cu continut de paraxilen si/sau ester metilic al acidului paratoluic

Country Status (20)

Country Link
US (1) US4372875A (ro)
EP (1) EP0020990B1 (ro)
JP (1) JPS5948142B2 (ro)
AR (1) AR220631A1 (ro)
AT (1) ATE9327T1 (ro)
BG (1) BG49164A3 (ro)
BR (1) BR8003618A (ro)
CA (1) CA1145739A (ro)
CS (1) CS221918B2 (ro)
DD (1) DD151115A5 (ro)
DE (2) DE2923681C2 (ro)
ES (1) ES8102086A1 (ro)
IN (1) IN153472B (ro)
MX (1) MX153999A (ro)
PL (1) PL125337B1 (ro)
RO (1) RO79997A (ro)
SU (1) SU1088662A3 (ro)
TR (1) TR21572A (ro)
YU (1) YU41363B (ro)
ZA (1) ZA803501B (ro)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2950318C2 (de) * 1979-12-14 1982-02-25 Dynamit Nobel Ag, 5210 Troisdorf Gewinnung und Wiederverwendung von Kobalt- oder Kobalt und Manganverbindungen aus dem Witten-DMT-Prozeß
DE3037054C2 (de) * 1979-12-14 1983-09-08 Dynamit Nobel Ag, 5210 Troisdorf Verfahrens zur Gewinnung und Wiederverwendung von Kobalt- oder Kobalt- und Manganverbindungen aus dem Witten-DMT-Prozeß
DE3045332C2 (de) * 1980-12-02 1982-11-25 Dynamit Nobel Ag, 5210 Troisdorf Verfahren zur Gewinnung und Wiederverwendung von Schwermetalloxidationskatalysator aus Rückständen im Witten-DMT-Prozeß
DE3112066C2 (de) * 1981-03-27 1984-03-01 Dynamit Nobel Ag, 5210 Troisdorf Verfahren zur Gewinnung von 1,2,4-Benzoltricarbonsäure
US4459365A (en) * 1981-05-29 1984-07-10 Mitsubishi Gas Chemical Company, Inc. Method of recovering a catalytic metal
JPS60477U (ja) * 1983-06-11 1985-01-05 一戸コンクリ−ト株式会社 段部付手がけ式側溝蓋
JPS60169380U (ja) * 1984-04-16 1985-11-09 ヤマウ総合開発株式会社 みぞぶた
JPH06204853A (ja) * 1993-01-07 1994-07-22 Nec Corp 論理回路
CN110818559A (zh) * 2019-11-26 2020-02-21 南通百川新材料有限公司 一种偏苯三酸酐精馏母液残渣的回收利用方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2894498A (en) * 1957-01-04 1959-07-14 Gen Motors Corp Multiple speed drive and control system
DE1568421A1 (de) * 1966-10-20 1970-03-19 Dynamit Nobel Ag Verfahren zur Gewinnung von Trimellitsaeure und/oder Trimellitsaeureanhydrid
JPS5221037Y2 (ro) * 1971-05-11 1977-05-14
DD104973A5 (ro) * 1972-09-12 1974-04-05
JPS522896B2 (ro) * 1973-01-18 1977-01-25
DE2327773A1 (de) * 1973-05-30 1974-12-19 Teijin Hercules Chem Co Ltd Verfahren zur gewinnung von dimethylterephthalat und seiner zwischenprodukte
DE2427875C3 (de) * 1974-06-10 1980-03-20 Dynamit Nobel Ag, 5210 Troisdorf Verfahren zur Gewinnung von Dimethylterephthalat und von Zwischenprodukten der Dimethylterephthalat-Herstellung
US4096340A (en) * 1975-06-03 1978-06-20 Teijin Hercules Chemical Co., Ltd. Process for the preparation of dimethyl terephthalate

Also Published As

Publication number Publication date
US4372875A (en) 1983-02-08
MX153999A (es) 1987-03-19
ATE9327T1 (de) 1984-09-15
EP0020990A3 (en) 1981-10-14
EP0020990B1 (de) 1984-09-12
IN153472B (ro) 1984-07-21
RO79997A (ro) 1983-02-01
EP0020990A2 (de) 1981-01-07
ES492320A0 (es) 1980-12-16
CA1145739A (en) 1983-05-03
AR220631A1 (es) 1980-11-14
TR21572A (tr) 1984-10-08
DD151115A5 (de) 1981-10-08
JPS562849A (en) 1981-01-13
ZA803501B (en) 1981-08-26
JPS5948142B2 (ja) 1984-11-24
ES8102086A1 (es) 1980-12-16
BR8003618A (pt) 1981-01-05
YU151780A (en) 1983-12-31
BG49164A3 (en) 1991-08-15
YU41363B (en) 1987-02-28
DE3069134D1 (en) 1984-10-18
CS221918B2 (en) 1983-04-29
DE2923681C2 (de) 1981-11-05
DE2923681B1 (de) 1980-10-23
SU1088662A3 (ru) 1984-04-23
PL125337B1 (en) 1983-04-30
PL224850A1 (ro) 1981-04-10

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