UA26192C2 - Спосіб одержаhhя очищеhої терефталевої кислоти - Google Patents

Спосіб одержаhhя очищеhої терефталевої кислоти

Info

Publication number
UA26192C2
UA26192C2 UA93003982A UA93003982A UA26192C2 UA 26192 C2 UA26192 C2 UA 26192C2 UA 93003982 A UA93003982 A UA 93003982A UA 93003982 A UA93003982 A UA 93003982A UA 26192 C2 UA26192 C2 UA 26192C2
Authority
UA
Ukraine
Prior art keywords
terephthalic acid
acid
present
purified
purificating
Prior art date
Application number
UA93003982A
Other languages
English (en)
Russian (ru)
Inventor
Джин Дебра Стрейч
Джин Діане Гразіано
Джин Диане Гразиано
Сандра К. Шиллер
Роджер Джон Грімм
Роджер Джон Гримм
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
Publication of UA26192C2 publication Critical patent/UA26192C2/uk

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02—Phosphorus compounds
    • C07F9/28—Phosphorus compounds with one or more P—C bonds
    • C07F9/46—Phosphinous acids [R2POH], [R2P(= O)H]: Thiophosphinous acids including[R2PSH]; [R2P(=S)H]; Aminophosphines [R2PNH2]; Derivatives thereof
    • 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)
  • Life Sciences & Earth Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

Спосіб ожержання очищеної терефталевої кислоти, що містить п-толуілову кислоту, присутню при концентрації, рівній або менше 200 частин на мільйон по вазі, включає обробку терефталевої кислоти, заздалегідь очищеної контактом водного розчину терефталевої кислоти з воднем. Вказану обробку проводять шляхом введення у фільтруючу комірку або послідовність фільтруючих комірок, що знаходяться в зоні фільтрування, при температурі, принаймні, від 38 до 205°C і тиску системи від атмосферного до 1620 кПа, водного шламу. Шлам містить очищену терефталеву кислоту, присутню у вигляді кристалів, і п-толуїлову кислоту, присутню у вигляді водного розчину і в кристалізованій формі спільно з кристалами очищеної терефталевої кислоти.
UA93003982A 1991-04-12 1992-04-09 Спосіб одержаhhя очищеhої терефталевої кислоти UA26192C2 (uk)

Applications Claiming Priority (2)

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

Publications (1)

Publication Number Publication Date
UA26192C2 true UA26192C2 (uk) 1999-07-19

Family

ID=24751228

Family Applications (1)

Application Number Title Priority Date Filing Date
UA93003982A UA26192C2 (uk) 1991-04-12 1992-04-09 Спосіб одержаhhя очищеhої терефталевої кислоти

Country Status (16)

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

Families Citing this family (111)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9104776D0 (en) * 1991-03-07 1991-04-17 Ici Plc Process for the production of terephthalic acid
GB9310070D0 (en) * 1992-05-29 1993-06-30 Ici Plc Process for the production of purified terephthalic acid
GB9302333D0 (en) * 1993-02-05 1993-03-24 Ici Plc Filtration process
JPH06327915A (ja) * 1993-05-24 1994-11-29 Mitsui Petrochem Ind Ltd スラリーから結晶を回収する方法及び装置
US6013835A (en) * 1995-06-07 2000-01-11 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
US5767311A (en) * 1995-06-07 1998-06-16 Glitsch International, Inc. Method and apparatus for preparing purified terephtalic acid
US6034269A (en) * 1998-08-03 2000-03-07 E. I. Du Pont De Nemours And Company Process for producing pure carboxylic acids
IT1311976B1 (it) 1999-03-25 2002-03-22 Franco Codignola Procedimento per la produzione di acidi aromatici.
MXPA01012034A (es) * 1999-05-24 2002-05-06 Baker Hughes Inc Dispositivo de filtracion de presion y metodo que emplea una camara de despresurizacion y transporte de material.
US6639104B2 (en) * 1999-12-10 2003-10-28 Inca International S.P.A. Process for the recovery of purified terephthalic acid (PTA)
BR0016947A (pt) * 1999-12-29 2002-09-10 Inca Internat S P A Processo para recuperar ácido tereftálico (tpa) purificado
US6655531B1 (en) 2000-05-23 2003-12-02 Baker Hughes Incorporated Pressure filtration device
IT1319169B1 (it) 2000-07-14 2003-09-26 Eurotecnica Dev & Licensing Sr Procedimento per la purificazione di acidi carbossilici aromatici.
EP1402942B8 (en) * 2001-05-15 2010-04-14 Mitsubishi Chemical Corporation Process for producing a compound
US6689903B2 (en) * 2001-06-04 2004-02-10 Eastman Chemical Company Crystallization method for production of purified aromatic dicarboxylic acids
US7196215B2 (en) * 2001-06-04 2007-03-27 Eastman Chemical Company Process for the production of purified terephthalic acid
US7485747B2 (en) * 2001-06-04 2009-02-03 Eastman Chemical Company Two stage oxidation process for the production of aromatic dicarboxylic acids
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
AU2003280809A1 (en) * 2002-11-14 2004-06-03 Mitsubishi Chemical Corporation Process for producing terephthalic acid
US7161027B2 (en) * 2002-12-09 2007-01-09 Eastman Chemical Company Process for the oxidative purification of terephthalic acid
US7074954B2 (en) * 2002-12-09 2006-07-11 Eastman Chemical Company Process for the oxidative purification of terephthalic acid
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
US20040215036A1 (en) * 2003-04-25 2004-10-28 Robert Lin Method for heating a crude carboxylic acid slurry in a post oxidation zone by the addition of steam
US7381386B2 (en) 2003-06-05 2008-06-03 Eastman Chemical Company Extraction process for removal of impurities from mother liquor in the synthesis of carboxylic acid
US7282151B2 (en) * 2003-06-05 2007-10-16 Eastman Chemical Company Process for removal of impurities from mother liquor in the synthesis of carboxylic acid using pressure filtration
US7494641B2 (en) 2003-06-05 2009-02-24 Eastman Chemical Company Extraction process for removal of impurities from an oxidizer purge stream in the synthesis of carboxylic acid
US7351396B2 (en) 2003-06-05 2008-04-01 Eastman Chemical Company Extraction process for removal of impurities from an aqueous mixture
US7452522B2 (en) 2003-06-05 2008-11-18 Eastman Chemical Company Extraction process for removal of impurities from an oxidizer purge stream in the synthesis of carboxylic acid
US7410632B2 (en) 2003-06-05 2008-08-12 Eastman Chemical Company Extraction process for removal of impurities from mother liquor in the synthesis of carboxylic acid
US7546747B2 (en) * 2004-01-15 2009-06-16 Eastman Chemical Company Process for production of a dried carboxylic acid cake 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
US20050283022A1 (en) * 2004-06-18 2005-12-22 Sheppard Ronald B Filtrate preparation process for terephthalic acid filtrate treatment
CN1264802C (zh) * 2004-07-08 2006-07-19 艾博特(厦门)设备工程有限公司 一种制备纯度达到99.98%以上的纯对苯二甲酸的方法
US7582793B2 (en) 2004-09-02 2009-09-01 Eastman Chemical Company Optimized liquid-phase oxidation
US7568361B2 (en) 2004-09-02 2009-08-04 Eastman Chemical Company Optimized liquid-phase oxidation
US7683210B2 (en) 2004-09-02 2010-03-23 Eastman Chemical Company Optimized liquid-phase oxidation
US7504535B2 (en) 2004-09-02 2009-03-17 Eastman Chemical Company Optimized liquid-phase oxidation
US7381836B2 (en) 2004-09-02 2008-06-03 Eastman Chemical Company Optimized liquid-phase oxidation
US7692036B2 (en) 2004-11-29 2010-04-06 Eastman Chemical Company Optimized liquid-phase oxidation
US7371894B2 (en) 2004-09-02 2008-05-13 Eastman Chemical Company Optimized liquid-phase oxidation
US7692037B2 (en) 2004-09-02 2010-04-06 Eastman Chemical Company Optimized liquid-phase oxidation
US7897810B2 (en) 2004-09-02 2011-03-01 Eastman Chemical Company Optimized production of aromatic dicarboxylic acids
US7741515B2 (en) 2004-09-02 2010-06-22 Eastman Chemical Company Optimized liquid-phase oxidation
US20070238899A9 (en) 2004-09-02 2007-10-11 Robert Lin Optimized production of aromatic dicarboxylic acids
US7589231B2 (en) 2004-09-02 2009-09-15 Eastman Chemical Company Optimized liquid-phase oxidation
US7888530B2 (en) 2004-09-02 2011-02-15 Eastman Chemical Company Optimized production of aromatic dicarboxylic acids
US7910769B2 (en) 2004-09-02 2011-03-22 Eastman Chemical Company Optimized liquid-phase oxidation
US7572936B2 (en) 2004-09-02 2009-08-11 Eastman Chemical Company Optimized liquid-phase oxidation
US7507857B2 (en) 2004-09-02 2009-03-24 Eastman Chemical Company Optimized liquid-phase oxidation
MY144892A (en) * 2004-10-28 2011-11-30 Grupo Petrotemex Sa De Cv Process for removal of impurities from an oxidizer purge stream
US7273559B2 (en) 2004-10-28 2007-09-25 Eastman Chemical Company Process for removal of impurities from an oxidizer purge stream
US7291270B2 (en) 2004-10-28 2007-11-06 Eastman Chemical Company Process for removal of impurities from an oxidizer purge stream
US8492583B2 (en) * 2004-12-13 2013-07-23 Bp Corporation North America Inc. Process for purification of aromatic carboxylic acids
CN101146756B (zh) * 2005-03-21 2011-05-18 Bp北美公司 用于制造纯形式的芳族羧酸的方法和设备
US7919652B2 (en) * 2005-05-19 2011-04-05 Eastman Chemical Company Process to produce an enriched composition through the use of a catalyst removal zone and an enrichment zone
US7304178B2 (en) * 2005-05-19 2007-12-04 Eastman Chemical Company Enriched isophthalic acid composition
US7884231B2 (en) * 2005-05-19 2011-02-08 Eastman Chemical Company Process to produce an enriched composition
US20060264664A1 (en) * 2005-05-19 2006-11-23 Parker Kenny R Esterification of an exchange solvent enriched composition
US7557243B2 (en) * 2005-05-19 2009-07-07 Eastman Chemical Company Enriched terephthalic acid composition
US7880031B2 (en) * 2005-05-19 2011-02-01 Eastman Chemical Company Process to produce an enrichment feed
US20060264662A1 (en) * 2005-05-19 2006-11-23 Gibson Philip E Esterification of an enriched composition
US7897809B2 (en) * 2005-05-19 2011-03-01 Eastman Chemical Company Process to produce an enrichment feed
US20060264656A1 (en) * 2005-05-19 2006-11-23 Fujitsu Limited Enrichment process using compounds useful in a polyester process
US7834208B2 (en) * 2005-05-19 2010-11-16 Eastman Chemical Company Process to produce a post catalyst removal composition
US7432395B2 (en) 2005-05-19 2008-10-07 Eastman Chemical Company Enriched carboxylic acid composition
US7741516B2 (en) * 2005-05-19 2010-06-22 Eastman Chemical Company Process to enrich a carboxylic acid composition
US7884232B2 (en) 2005-06-16 2011-02-08 Eastman Chemical Company Optimized liquid-phase oxidation
US7402694B2 (en) 2005-08-11 2008-07-22 Eastman Chemical Company Process for removal of benzoic acid from an oxidizer purge stream
US7569722B2 (en) 2005-08-11 2009-08-04 Eastman Chemical Company Process for removal of benzoic acid from an oxidizer purge stream
CN100522915C (zh) * 2005-12-27 2009-08-05 艾博特(厦门)设备工程有限公司 一种用来分离粗对苯二甲酸(cta)的方法
CA2626033C (en) 2005-12-29 2013-09-03 Bp Corporation North America Inc. Ethanolysis of pet to form det and oxidation thereof
US20070155987A1 (en) * 2006-01-04 2007-07-05 O'meadhra Ruairi S Oxidative digestion with optimized agitation
US20070179312A1 (en) * 2006-02-02 2007-08-02 O'meadhra Ruairi Seosamh Process for the purification of a crude carboxylic axid slurry
US8173835B2 (en) * 2006-03-01 2012-05-08 Grupo Petrotemex, S.A. De C.V. Method and apparatus for drying carboxylic acid
US7326807B2 (en) 2006-03-01 2008-02-05 Eastman Chemical Company Polycarboxylic acid production system with enhanced heating for oxidative digestion
US20070208199A1 (en) * 2006-03-01 2007-09-06 Kenny Randolph Parker Methods and apparatus for isolating carboxylic acid
US8697906B2 (en) * 2006-03-01 2014-04-15 Grupo Petrotemex, S.A. De C.V. Methods and apparatus for producing a low-moisture carboxylic acid wet cake
US7501537B2 (en) * 2006-03-01 2009-03-10 Eastman Chemical Company Polycarboxylic acid production system employing oxidative digestion with reduced or eliminated upstream liquor exchange
US7816556B2 (en) * 2006-03-01 2010-10-19 Eastman Chemical Company Polycarboxylic acid production system employing enhanced multistage oxidative digestion
US7863481B2 (en) 2006-03-01 2011-01-04 Eastman Chemical Company Versatile oxidation byproduct purge process
US7462736B2 (en) * 2006-03-01 2008-12-09 Eastman Chemical Company Methods and apparatus for isolating carboxylic acid
US7772424B2 (en) * 2006-03-01 2010-08-10 Eastman Chemical Company Polycarboxylic acid production system employing enhanced evaporative concentration downstream of oxidative digestion
US7880032B2 (en) 2006-03-01 2011-02-01 Eastman Chemical Company Versatile oxidation byproduct purge process
US7863483B2 (en) * 2006-03-01 2011-01-04 Eastman Chemical Company Carboxylic acid production process
US7393973B2 (en) * 2006-03-01 2008-07-01 Eastman Chemical Company Polycarboxylic acid production system with enhanced residence time distribution for oxidative digestion
US7897808B2 (en) 2006-03-01 2011-03-01 Eastman Chemical Company Versatile oxidation byproduct purge process
US7326808B2 (en) * 2006-03-01 2008-02-05 Eastman Chemical Company Polycarboxylic acid production system employing cooled mother liquor from oxidative digestion as feed to impurity purge system
US7420082B2 (en) 2006-03-01 2008-09-02 Eastman Chemical Company Polycarboxylic acid production system employing hot liquor removal downstream of oxidative digestion
US7847121B2 (en) * 2006-03-01 2010-12-07 Eastman Chemical Company Carboxylic acid production process
US20070208194A1 (en) 2006-03-01 2007-09-06 Woodruff Thomas E Oxidation system with sidedraw secondary reactor
US7888529B2 (en) 2006-03-01 2011-02-15 Eastman Chemical Company Process to produce a post catalyst removal composition
US20070203359A1 (en) 2006-03-01 2007-08-30 Philip Edward Gibson Versatile oxidation byproduct purge process
CN101152969B (zh) * 2006-09-29 2011-01-19 中国石油化工股份有限公司石油化工科学研究院 对苯二甲酸生产废水的处理方法
KR20100019462A (ko) * 2007-05-31 2010-02-18 다우 이탈리아 에스.알.엘. 테레프탈산의 회수를 위한 개선된 방법
US8614350B2 (en) 2008-01-15 2013-12-24 Eastman Chemical Company Carboxylic acid production process employing solvent from esterification of lignocellulosic material
US8455680B2 (en) 2008-01-15 2013-06-04 Eastman Chemical Company Carboxylic acid production process employing solvent from esterification of lignocellulosic material
KR101194067B1 (ko) * 2008-01-25 2012-10-24 삼성석유화학(주) 테레프탈산 제조에서의 결정화 및 고액 분리 공정
KR100976034B1 (ko) 2009-01-06 2010-08-17 삼성석유화학(주) 고순도의 테레프탈산 회수방법
BRPI1006621A2 (pt) * 2009-04-24 2016-04-19 INVISTA Technologies S à r l "método de resfriar uma corrente de água-mãe"
US20120178964A1 (en) 2009-09-30 2012-07-12 Bp Corporation North America Inc Catalyst, Use Thereof and Process of Hydrogenating Aryl Aldehydes
CN102126945A (zh) * 2010-01-13 2011-07-20 中国石油化工股份有限公司 回收精对苯二甲酸的方法
GB201102476D0 (en) * 2011-02-11 2011-03-30 Davy Process Techn Ltd Process
DE102012007675A1 (de) * 2012-04-17 2013-10-17 BOKELA Ingenieurgesellschaft für mechanische Verfahrenstechnik mbH Verfahren und Anlage zum Herstellen von TA(Terephtalsäure)
US20140175025A1 (en) * 2012-12-21 2014-06-26 Eastman Chemical Company Generation of low-solids second mother liquor from terephthalic acid production filter
US9826757B2 (en) 2013-03-15 2017-11-28 Advance International Inc. Automated method and system for recovering protein powder meal, pure omega 3 oil and purified distilled water from animal tissue
CA2933721A1 (en) 2013-12-18 2015-06-25 Bp Corporation North America Inc. Improved process and apparatus for manufacturing aromatic carboxylic acids
CN105873655B (zh) 2013-12-31 2018-10-19 Bp北美公司 使用无干燥旋转压滤器的固体-液体分离
GB201508411D0 (en) * 2015-05-15 2015-07-01 Invista Tech Sarl Filter
GB201513933D0 (en) * 2015-08-06 2015-09-23 Invista Technologies Srl Rotary filter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497552A (en) * 1966-07-18 1970-02-24 Standard Oil Co Continuous crystallization in a plurality of cooling stages using dilutions by cooled solvent of feed to each stage
US3624145A (en) * 1969-02-17 1971-11-30 Du Pont Purification of terephthalic acid by liquid-liquid extraction
DE2714985C2 (de) * 1977-04-04 1982-05-06 Chemische Werke Hüls AG, 4370 Marl Verfahren zur Reinigung von Terephthalsäure
NO156927C (no) * 1981-08-04 1987-12-23 Mueller Drm Ag FramgangsmŸte for kontinuerlig fortykning av suspensjoner.
DE3729268A1 (de) * 1987-09-02 1989-03-16 Henkel Kgaa Verfahren und anlage zur abtrennung und reinigung von celluloseethern und anderen cellulosederivaten

Also Published As

Publication number Publication date
MX9201703A (es) 1992-09-01
JPH06506461A (ja) 1994-07-21
CN1035815C (zh) 1997-09-10
JP3342011B2 (ja) 2002-11-05
ATE157343T1 (de) 1997-09-15
CN1066841A (zh) 1992-12-09
US5175355A (en) 1992-12-29
DE69221858D1 (de) 1997-10-02
ES2104910T3 (es) 1997-10-16
DE69221858T2 (de) 1998-04-02
RU2109007C1 (ru) 1998-04-20
EP0579715B1 (en) 1997-08-27
BR9205884A (pt) 1994-08-23
EP0579715A1 (en) 1994-01-26
KR100210181B1 (ko) 1999-07-15
SG80528A1 (en) 2001-05-22
TW203603B (uk) 1993-04-11
CA2108268A1 (en) 1992-10-13
WO1992018454A1 (en) 1992-10-29
CA2108268C (en) 2003-02-04

Similar Documents

Publication Publication Date Title
UA26192C2 (uk) Спосіб одержаhhя очищеhої терефталевої кислоти
UA7080A1 (uk) Спосіб одержання кристалічного торасеміду
ATE54124T1 (de) Abflussbehandlung.
DE59107901D1 (de) Verfahren zur herstellung gereinigter glycolipide durch membrantrennverfahren
PH23281A (en) A process for the manufacture of algenates (polyuronides) with altered physical properties
GB1484860A (en) Manufacture of boric acid
ATE16406T1 (de) Verfahren zur herstellung von isomaltulose (6-o- alpha-d-gluco-pyranosido-d-fructose) mit hilfe von immobilisierten bakterienzellen.
ATE28084T1 (de) Verfahren zur herstellung von isomaltulose (6-0- alpha-d-glucopyranosido-d-fructose) mit hilfe von immobilisierten bakterienzellen.
TW336954B (en) Process for preparing neotrehalose, and its uses
JPS5468414A (en) Production of porous hollow polypropylene fibers
JPS5791196A (en) Separation of inosine, guanosine or their mixture from cell bodies and high polymeric substances
KR910007859A (ko) 고순도 테레프탈산의 제조방법
ZA9610233B (en) Process of preparing an organic acid
CA2046128A1 (en) Method of purifying ferment-produced riboflavin
JPS5467093A (en) Purification of amino acid
ES458767A1 (es) Procedimiento para la separacion de 4 4'-diaminodifenilmeta-no.
AU3823195A (en) Process for recovering citric acid
JPS5799198A (en) Preparation of l-phenylalanine
JPS57102191A (en) Separating method of dicarboxylic acid
JPS6411A (en) Production of purified raw material for cosmetic
JPS6456891A (en) Method for purifying copper electrolytic solution
SU1244097A1 (ru) Способ очистки сточных вод производства пентаэритрита
JPS5539712A (en) Production of 6-aminopenicillanic acid by fixed enzyme method
ES2061918T3 (es) Procedimiento para la purificacion de 1,2-bis (nicotinamido) propano.
Bondi et al. Method of Purifying Caprolactam