KR880012519A - 고품질 테레프탈산의 제조방법 - Google Patents

고품질 테레프탈산의 제조방법 Download PDF

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Publication number
KR880012519A
KR880012519A KR1019880004638A KR880004638A KR880012519A KR 880012519 A KR880012519 A KR 880012519A KR 1019880004638 A KR1019880004638 A KR 1019880004638A KR 880004638 A KR880004638 A KR 880004638A KR 880012519 A KR880012519 A KR 880012519A
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South Korea
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oxidation
terephthalic acid
post
oxidation reaction
temperature
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KR1019880004638A
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English (en)
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아끼오 다마루
요시아끼 이즈미사와
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시바다 마쓰시로오
미쓰비시가세이고오교가부시끼가이샤
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Application filed by 시바다 마쓰시로오, 미쓰비시가세이고오교가부시끼가이샤 filed Critical 시바다 마쓰시로오
Publication of KR880012519A publication Critical patent/KR880012519A/ko

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
    • C07C63/14—Monocyclic dicarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
    • C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
    • C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

내용 없음

Description

고품질 테레프탈산의 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 실시예에서 사용한 반응기의 유통도이다. 제2도는 실시예1에서 얻은 고온 후산화전의 페테프탈산 결정의 분광 반사율을 나타내는 그래프이다. 제3도는 실시예1에서 얻은 테레프탈산 결정의 분광 반사율을 나타내는 그래프이다.

Claims (21)

  1. p-크실렌을 아세트산 용매중에서 최소한 중금속 및 브롬으로 이루어진 촉매 의 존재하에 180~230℃의 온도에서 산소분자를 이용하여 산화시켜 최소한 95중량%의 p-크실렌을 테레프탈산으로 전환시키고, 임의로, 생성된 반응 혼합물을 제1산화 반응의 온도보다 낮은 온도에서 산소분자를 이용하여 저온 후산화시켜 하기에 정의한 분광 반사율이 70%이상이고 하기에 정의한 반사율 비율(400/500)이 0.92이상인 테레프탈산 입자를 함유하는 슬러리를 수득하고 ; 슬러리를 235~290℃의 온도에서 산소분자를 이용하여 고온 후산화시킨 후에 결정화하고;생성된 테레프탈산의 제조방법.
    분광분사율=백색광 조명법에 따라 측정한 파장500nm에서의 분광 분사율
  2. 제1항에 있어서, 회수된 고품질 테레프탈산이 70%이상의 분광분사율 및 0.96이상의 반사율 비율(400/500)을 가짐을 특징으로 하는 방법.
  3. 제1항에 있어서, 고온 후산화시킨 슬러리중의 테레프탈산 입자가 0.97이상의 반사율 비율(450/500)을 갖는 방법.
  4. 제1항에 있어서, 고온 후산화시킨 슬러리중의 테레프탈산 입자가 80%이상의 분광 반사율 및 0.93~0.98의 반사율 비율(400/500)을 갖는 방법.
  5. 제1항 또는 2항에 있어서, 회수된 테레프탈산이 0.985이상의 반사율 비율(450/500)을 갖는 방법.
  6. 제1항 또는 4항에 있어서, 회수한 테레프탈산이 80%이상의 분광 반사율 및 0.965~1.005의 반사율비율(400/500)을 갖는 방법.
  7. 제1항에 있어서, 촉매가 필수적으로 코발트, 망간 및 브롬으로 이루어진 삼원 촉매인 방법.
  8. 제1항에 있어서, 제1산화반응의 압력이 10~30Kg/cm2의 범위인 방법.
  9. 제1항에 있어서, 제1산화반응의 시간이 40~150분의 범위인 방법.
  10. 제1항에 있어서, 제1산화반응에서 배출된 기체중의 산소농도가 1.5~8부피%의 범위인 방법.
  11. 제1항에 있어서, 제1산화반응의 액산중의 물의 농도가 5~15중량%의 범위인 방법.
  12. 제1항에 있어서, 제1산화반응 중의 산소 분자 공급량이 p-크실렌 공급량의 3~100배몰인 방법.
  13. 제1항에 있어서, 저온 후산화를 제1산화반응 후에 수행하는 방법.
  14. 제1항 또는 13항에 있어서, 저온 후산화의 온도가 제1산화반응의 온도보다 2~30℃낮은 방법.
  15. 제1항 또는 13항에 있어서, 저온 후산화의 반응시간이 5~90분의 범위인 방법.
  16. 제1항 또는 13항에 있어서, 저온 후산화에 이용되는 산소분자의 공급량이 제1산화반응의 공급량의 1/10~1/1000인 방법.
  17. 제1항에 있어서, 고온 후산화의 온도가 240~280℃인 방법
  18. 제1항에 있어서, 고온 후산화의 압력이 30~100Kg/cm2인 방법.
  19. 제1항에 있어서, 고온 후산화에서 배출된 기체중의 산소 농도가 0.5부피% 이하인 방법.
  20. 제1항 또는 19항에 있어서, 고온 후산화반응에서 이용된 산소 분자의 공급량이 슬러리중의 테레프탈산의 양의 0.003~0.3몰배 범위인 방법.
  21. 제1항에 있어서, 결정화 도중에, 산소분자를 배출기체중의 산소농도가 2~8부피%로 되는 양으로 160~230℃ 구역의 슬러리에 공급하는 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019880004638A 1987-04-24 1988-04-23 고품질 테레프탈산의 제조방법 KR880012519A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62101373A JP2504461B2 (ja) 1987-04-24 1987-04-24 高品質テレフタル酸の製法
JP62-101373 1987-04-24

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KR880012519A true KR880012519A (ko) 1988-11-28

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US (1) US4877900A (ko)
JP (1) JP2504461B2 (ko)
KR (1) KR880012519A (ko)
GB (1) GB2204581B (ko)

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RU2435754C2 (ru) 2005-03-21 2011-12-10 Бп Корпорейшн Норт Америка Инк. Способ возврата энергии в процессе производства ароматических карбоновых кислот
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JP2504461B2 (ja) 1996-06-05
GB2204581A (en) 1988-11-16
GB8807731D0 (en) 1988-05-05
JPS63267744A (ja) 1988-11-04
GB2204581B (en) 1991-02-06
US4877900A (en) 1989-10-31

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