BE732838A - - Google Patents
Info
- Publication number
- BE732838A BE732838A BE732838DA BE732838A BE 732838 A BE732838 A BE 732838A BE 732838D A BE732838D A BE 732838DA BE 732838 A BE732838 A BE 732838A
- Authority
- BE
- Belgium
- Prior art keywords
- acid
- pressure
- terephthalic acid
- temperature
- sep
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE732838 | 1969-05-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE732838A true BE732838A (ja) | 1969-10-16 |
Family
ID=3854732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE732838D BE732838A (ja) | 1969-05-09 | 1969-05-09 |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE732838A (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998024749A1 (en) * | 1996-12-06 | 1998-06-11 | Hfm International, Inc. | Method and apparatus for preparing purified terephthalic acid |
US5929274A (en) | 1995-06-07 | 1999-07-27 | Hfm International, Inc. | Method to reduce carboxybenzaldehyde isomers in terephthalic acid or isophthalic acid |
US6054610A (en) | 1995-06-07 | 2000-04-25 | Hfm International, Inc. | Method and apparatus for preparing purified terephthalic acid and isophthalic acid from mixed xylenes |
-
1969
- 1969-05-09 BE BE732838D patent/BE732838A/fr unknown
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5929274A (en) | 1995-06-07 | 1999-07-27 | Hfm International, Inc. | Method to reduce carboxybenzaldehyde isomers in terephthalic acid or isophthalic acid |
US6013835A (en) | 1995-06-07 | 2000-01-11 | Hfm International, Inc. | Method and apparatus for preparing purified terephthalic acid |
US6054610A (en) | 1995-06-07 | 2000-04-25 | Hfm International, Inc. | Method and apparatus for preparing purified terephthalic acid and isophthalic acid from mixed xylenes |
US6113866A (en) | 1995-06-07 | 2000-09-05 | Hfm International, Inc. | Apparatus for preparing purified terephthalic acid |
WO1998024749A1 (en) * | 1996-12-06 | 1998-06-11 | Hfm International, Inc. | Method and apparatus for preparing purified terephthalic acid |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3850983A (en) | Separation of terephthalic from paratoluic acid from solutions thereof in water and/or acetic acid | |
JP2672379B2 (ja) | 99.8重量%より高い純度のp―キシレンを製造する方法 | |
WO1992018454A1 (en) | Process for recovery of purified terephthalic acid | |
US2813858A (en) | Process for purifying epsilon-caprolactam | |
JP2014221791A (ja) | テレフタル酸の回収のための改善された方法 | |
FR2636343A1 (ja) | ||
BE732838A (ja) | ||
JPS62158233A (ja) | ビスフエノ−ルAのo,p’−異性体の分離方法 | |
FR2507595A1 (fr) | Processus en continu pour obtenir de l'acide terephtalique et du glycol purs en partant de polyethylene terephtalate residuel | |
JP2003519205A (ja) | 精製したテレフタル酸(pta)の回収方法 | |
JPH03216195A (ja) | アミノ酸・核酸およびその誘導体の精製方法 | |
KR100473001B1 (ko) | 2,6-디메틸나프탈렌의 제조 방법 | |
JPS582217B2 (ja) | デカンジカルボン酸−(1,10)の製法 | |
CN110872274B (zh) | 分步析晶提纯高残渣盐酸氨丙啉的方法 | |
JPH06200287A (ja) | 天然粗ワックスの精製方法 | |
US2806889A (en) | Recovery of trimethylolethane | |
US5929255A (en) | Process for coproducing fumaric acid and maleic anhydride | |
JP2004514638A (ja) | 高濃縮過酸化水素を製造するための晶出方法 | |
US270042A (en) | Office | |
CN219272164U (zh) | 一种己二酸生产废液中二元酸回收提纯系统 | |
JPS62275018A (ja) | 酸性廃液から有価金属及び酸を回収する方法 | |
JPH02207809A (ja) | 固液分離装置および固液分離方法 | |
KR20020024334A (ko) | 2,6-디메틸나프탈렌의 제조방법 | |
US4070409A (en) | Process for recovering anthracene | |
WO1997024303A1 (fr) | Procede de purification d'une substance cristalline |