BR0317930A - Process for the production of high purity terephthalic acid - Google Patents

Process for the production of high purity terephthalic acid

Info

Publication number
BR0317930A
BR0317930A BR0317930-3A BR0317930A BR0317930A BR 0317930 A BR0317930 A BR 0317930A BR 0317930 A BR0317930 A BR 0317930A BR 0317930 A BR0317930 A BR 0317930A
Authority
BR
Brazil
Prior art keywords
amount
terephthalic acid
high purity
production
4cba
Prior art date
Application number
BR0317930-3A
Other languages
Portuguese (pt)
Inventor
Motoki Numata
Takayuki Isogai
Tomohiko Ogata
Original Assignee
Mitsubishi Chem 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
Application filed by Mitsubishi Chem Corp filed Critical Mitsubishi Chem Corp
Publication of BR0317930A publication Critical patent/BR0317930A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42Separation; Purification; Stabilisation; Use of additives
    • C07C51/487Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

"PROCESSO PARA A PRODUçãO DE áCIDO TEREFTáLICO DE ALTA PUREZA". A vida de um catalisador de redução usado em uma etapa de redução em que se reduz 4CBA com hidrogênio em ácido p-tolúico é prolongada. o processo para produção de ácido tereftálico de alta pureza se caracteriza pelo fato de que, na etapa de redução, a razão da quantidade de hidrogênio alimentada ao reator de hidrogenação para a quantidade de 4CBA na solução alimentada ao reator, hidrogênio/4CBA, é de 2 a 10 (por moles) , e de que a razão da quantidade de ácido tereftálico bruto a ser tratada na etapa de redução para a quantidade de catalisador de redução presente no reator de hidrogenação, ¢quantidade de ácido tereftálico tratada (t/h) ! / ¢quantidade de catalisador de redução (t) ! , é de 400 a 5.000 (1/h)."PROCESS FOR THE PRODUCTION OF HIGH PURITY TERETAPHIC ACID". The life of a reduction catalyst used in a reduction step in which 4CBA with hydrogen in p-toluic acid is reduced is extended. The process for producing high purity terephthalic acid is characterized by the fact that, in the reduction step, the ratio of the amount of hydrogen fed to the hydrogenation reactor to the amount of 4CBA in the reactor-fed solution, hydrogen / 4CBA, is 2 to 10 (per mol), and the ratio of the amount of crude terephthalic acid to be treated in the reduction step to the amount of reduction catalyst present in the hydrogenation reactor, ¢ amount of treated terephthalic acid (t / h) ! / ¢ amount of reduction catalyst (t)! is from 400 to 5,000 (1 / hr).

BR0317930-3A 2003-01-07 2003-12-22 Process for the production of high purity terephthalic acid BR0317930A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003001060 2003-01-07
PCT/JP2003/016464 WO2004060847A1 (en) 2003-01-07 2003-12-22 Process for producing high-purity terephthalic acid

Publications (1)

Publication Number Publication Date
BR0317930A true BR0317930A (en) 2005-11-29

Family

ID=32708796

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0317930-3A BR0317930A (en) 2003-01-07 2003-12-22 Process for the production of high purity terephthalic acid

Country Status (4)

Country Link
CN (2) CN1982283A (en)
AU (1) AU2003289482A1 (en)
BR (1) BR0317930A (en)
WO (1) WO2004060847A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101531588B (en) * 2008-03-13 2016-02-24 周向进 The manufacture method of a kind of new pure terephthalic acid
CN101704742B (en) * 2009-11-20 2013-06-26 华东理工大学 Reactor for producing aromatic carboxylic acid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9102393D0 (en) * 1991-02-05 1991-03-20 Ici Plc Production of terephthalic acid

Also Published As

Publication number Publication date
CN1982283A (en) 2007-06-20
AU2003289482A1 (en) 2004-07-29
CN1692093A (en) 2005-11-02
CN1323999C (en) 2007-07-04
WO2004060847A1 (en) 2004-07-22

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: INDEFIRO O PEDIDO DE ACORDO COM O(S) ARTIGO(S) 8O E 13 DA LPI.

B09B Patent application refused [chapter 9.2 patent gazette]

Free format text: MANTIDO O INDEFERIMENTO UMA VEZ QUE NAO FOI APRESENTADO RECURSO DENTRO DO PRAZO LEGAL.