RU93058257A - Способ получения очищенной терефталевой кислоты - Google Patents

Способ получения очищенной терефталевой кислоты

Info

Publication number
RU93058257A
RU93058257A RU93058257/04A RU93058257A RU93058257A RU 93058257 A RU93058257 A RU 93058257A RU 93058257/04 A RU93058257/04 A RU 93058257/04A RU 93058257 A RU93058257 A RU 93058257A RU 93058257 A RU93058257 A RU 93058257A
Authority
RU
Russia
Prior art keywords
terephthalic acid
pressure
filter cake
purified terephthalic
acid
Prior art date
Application number
RU93058257/04A
Other languages
English (en)
Other versions
RU2109007C1 (ru
Inventor
Дебра Стрейч Джин
Диане Гразиано Джин
К.Шиллер Сандра
Джон Гримм Роджер
Original Assignee
Амоко Корпорейшн
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 Амоко Корпорейшн filed Critical Амоко Корпорейшн
Priority claimed from PCT/US1992/002910 external-priority patent/WO1992018454A1/en
Publication of RU93058257A publication Critical patent/RU93058257A/ru
Application granted granted Critical
Publication of RU2109007C1 publication Critical patent/RU2109007C1/ru

Links

Claims (1)

  1. Предложен способ получения очищенной терефталевой кислоты, содержащей по весу 200 частей на миллион (ppm) или менее п-толуиловой кислоты. Фильтровальную лепешку из очищенной терефталевой кислоты получают фильтрованием при дифференциальном давлении, заданном относительно давления в системе, и температуре примерно 100 - 205oС, водного шлама из очищенной терефталевой кислоты, содержащего раствор п-толуиловой кислоты. Водный раствор п-толуиловой кислоты, оставшейся в фильтровальной лепешке из очищенной терефталевой кислоты, вытесняют из фильтровальной лепешки водой, на которую действует градиент давления, заданный относительно давления в системе, что происходит при температуре примерно 100 - 205oC. Давление равновесного испарения воды, оставшейся в фильтровальной лепешке, происходит при сбросе давления в системе до пониженной величины с соответствующей пониженной температурой. Кристаллический продукт в виде терефталевой кислоты, содержащий по весу 200 частей на миллион (ppm) или менее п-толуиловой кислоты, может быть высушен при атмосферном давлении. Очищенная терефталевая кислота является пригодной для производства сложных полиэфиров, из которых делается одежда и родственные изделия.
RU93058257A 1991-04-12 1992-04-09 Способ получения очищенной терефталевой кислоты RU2109007C1 (ru)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US68521891A 1991-04-12 1991-04-12
US685218 1991-04-12
US685,218 1991-04-12
PCT/US1992/002910 WO1992018454A1 (en) 1991-04-12 1992-04-09 Process for recovery of purified terephthalic acid

Publications (2)

Publication Number Publication Date
RU93058257A true RU93058257A (ru) 1996-07-20
RU2109007C1 RU2109007C1 (ru) 1998-04-20

Family

ID=24751228

Family Applications (1)

Application Number Title Priority Date Filing Date
RU93058257A RU2109007C1 (ru) 1991-04-12 1992-04-09 Способ получения очищенной терефталевой кислоты

Country Status (16)

Country Link
US (1) US5175355A (ru)
EP (1) EP0579715B1 (ru)
JP (1) JP3342011B2 (ru)
KR (1) KR100210181B1 (ru)
CN (1) CN1035815C (ru)
AT (1) ATE157343T1 (ru)
BR (1) BR9205884A (ru)
CA (1) CA2108268C (ru)
DE (1) DE69221858T2 (ru)
ES (1) ES2104910T3 (ru)
MX (1) MX9201703A (ru)
RU (1) RU2109007C1 (ru)
SG (1) SG80528A1 (ru)
TW (1) TW203603B (ru)
UA (1) UA26192C2 (ru)
WO (1) WO1992018454A1 (ru)

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