JPS5533421A - Method of centrifuging slurry containing crystals of terephthalic acid - Google Patents

Method of centrifuging slurry containing crystals of terephthalic acid

Info

Publication number
JPS5533421A
JPS5533421A JP10574078A JP10574078A JPS5533421A JP S5533421 A JPS5533421 A JP S5533421A JP 10574078 A JP10574078 A JP 10574078A JP 10574078 A JP10574078 A JP 10574078A JP S5533421 A JPS5533421 A JP S5533421A
Authority
JP
Japan
Prior art keywords
terephthalic acid
cake
filter
thickness
good
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
JP10574078A
Other languages
Japanese (ja)
Other versions
JPS6133015B2 (en
Inventor
Ichiro Harada
Yuji Kadowaki
Setsuo Hirai
Tetsuo Mizukami
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.)
Kuraray Yuka Co Ltd
Original Assignee
Kuraray Yuka Co Ltd
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 Kuraray Yuka Co Ltd filed Critical Kuraray Yuka Co Ltd
Priority to JP10574078A priority Critical patent/JPS5533421A/en
Publication of JPS5533421A publication Critical patent/JPS5533421A/en
Publication of JPS6133015B2 publication Critical patent/JPS6133015B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: Slurries of terephthalic acid are separated into solid and liquid components using batchwise centrfuge and the cake on the filter is scratched off and the scratching is repeated so that the remaining thickness becomes gradually thinner, thus producing terephthalic of low metal content.
CONSTITUTION: The slurries containing terephthalic acid crystals resulting from the oxidation of p-xylene in an acetic acid solvent in the presence of a heavy metal is subjected to centrifugation with a batchwise centrifuge to separate terephthalic acid. The operation of scraping off the cake of terephthalic acid on the filter is repeated and at this time the thickness of cake remining on the filter is made gradually thin, whereby the filtration is kept good. When the heal is made thin at the beginning, the thickness becomes too early thin, though filtability is good, and resultingly the number of cycle becomes few. The adequated thickness of the heal is 18W25 mm. If the cake is washed with acetic acid before scraped, the good filtration operation can be effectively kept.
COPYRIGHT: (C)1980,JPO&Japio
JP10574078A 1978-08-29 1978-08-29 Method of centrifuging slurry containing crystals of terephthalic acid Granted JPS5533421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10574078A JPS5533421A (en) 1978-08-29 1978-08-29 Method of centrifuging slurry containing crystals of terephthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10574078A JPS5533421A (en) 1978-08-29 1978-08-29 Method of centrifuging slurry containing crystals of terephthalic acid

Publications (2)

Publication Number Publication Date
JPS5533421A true JPS5533421A (en) 1980-03-08
JPS6133015B2 JPS6133015B2 (en) 1986-07-31

Family

ID=14415658

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10574078A Granted JPS5533421A (en) 1978-08-29 1978-08-29 Method of centrifuging slurry containing crystals of terephthalic acid

Country Status (1)

Country Link
JP (1) JPS5533421A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7193109B2 (en) 2003-03-06 2007-03-20 Eastman Chemical Company Process for production of a carboxylic acid/diol mixture suitable for use in polyester production
US7214760B2 (en) 2004-01-15 2007-05-08 Eastman Chemical Company Process for production of a carboxylic acid/diol mixture suitable for use in polyester production
US7276625B2 (en) 2002-10-15 2007-10-02 Eastman Chemical Company Process for production of a carboxylic acid/diol mixture suitable for use in polyester production

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7276625B2 (en) 2002-10-15 2007-10-02 Eastman Chemical Company Process for production of a carboxylic acid/diol mixture suitable for use in polyester production
US7339072B2 (en) 2002-10-15 2008-03-04 Eastman Chemical Company Process for production of a carboxylic acid/diol mixture suitable for use in polyester production
US7193109B2 (en) 2003-03-06 2007-03-20 Eastman Chemical Company Process for production of a carboxylic acid/diol mixture suitable for use in polyester production
US7226986B2 (en) 2003-03-06 2007-06-05 Eastman Chemical Company Process for production of a carboxylic acid/diol mixture suitable for use in polyester production
US7214760B2 (en) 2004-01-15 2007-05-08 Eastman Chemical Company Process for production of a carboxylic acid/diol mixture suitable for use in polyester production
US7601795B2 (en) 2004-01-15 2009-10-13 Eastman Chemical Company Process for production of a carboxylic acid/diol mixture suitable for use in polyester production

Also Published As

Publication number Publication date
JPS6133015B2 (en) 1986-07-31

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