MX9709477A - Proceso continuo de hidrolisis para preparar acido 2-hidroxi-4-metiltiobutanoico o sales del mismo. - Google Patents

Proceso continuo de hidrolisis para preparar acido 2-hidroxi-4-metiltiobutanoico o sales del mismo.

Info

Publication number
MX9709477A
MX9709477A MX9709477A MX9709477A MX9709477A MX 9709477 A MX9709477 A MX 9709477A MX 9709477 A MX9709477 A MX 9709477A MX 9709477 A MX9709477 A MX 9709477A MX 9709477 A MX9709477 A MX 9709477A
Authority
MX
Mexico
Prior art keywords
hydroxy
reactor
methylthiobutanoic acid
salts
nitrile hydrolysis
Prior art date
Application number
MX9709477A
Other languages
English (en)
Inventor
Yung C Hsu
Thomas F Blackburn
Paul F Pellegrin
Allen H Kranz
James M Willock
Original Assignee
Novus Int Inc
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
Priority claimed from US08/647,161 external-priority patent/US5856567A/en
Application filed by Novus Int Inc filed Critical Novus Int Inc
Publication of MX9709477A publication Critical patent/MX9709477A/es

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18Stationary reactors having moving elements inside
    • B01J19/1812Tubular reactors
    • B01J19/1837Loop-type reactors
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K20/00Accessory food factors for animal feeding-stuffs
    • A23K20/10Organic substances
    • A23K20/105Aliphatic or alicyclic compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J14/00Chemical processes in general for reacting liquids with liquids; Apparatus specially adapted therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18Stationary reactors having moving elements inside
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18Stationary reactors having moving elements inside
    • B01J19/1862Stationary reactors having moving elements inside placed in series
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18Stationary reactors having moving elements inside
    • B01J19/1868Stationary reactors having moving elements inside resulting in a loop-type movement
    • B01J19/1881Stationary reactors having moving elements inside resulting in a loop-type movement externally, i.e. the mixture leaving the vessel and subsequently re-entering it
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24Stationary reactors without moving elements inside
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24Stationary reactors without moving elements inside
    • B01J19/2415Tubular reactors
    • B01J19/243Tubular reactors spirally, concentrically or zigzag wound
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24Stationary reactors without moving elements inside
    • B01J19/2415Tubular reactors
    • B01J19/2435Loop-type reactors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24Stationary reactors without moving elements inside
    • B01J19/245Stationary reactors without moving elements inside placed in series
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24Stationary reactors without moving elements inside
    • B01J19/2455Stationary reactors without moving elements inside provoking a loop type movement of the reactants
    • B01J19/2465Stationary reactors without moving elements inside provoking a loop type movement of the reactants externally, i.e. the mixture leaving the vessel and subsequently re-entering it
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C319/00Preparation of thiols, sulfides, hydropolysulfides or polysulfides
    • C07C319/14Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides
    • C07C319/20Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides by reactions not involving the formation of sulfide groups
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00002Chemical plants
    • B01J2219/00004Scale aspects
    • B01J2219/00011Laboratory-scale plants
    • B01J2219/00013Miniplants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00002Chemical plants
    • B01J2219/00027Process aspects
    • B01J2219/00033Continuous processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00051Controlling the temperature
    • B01J2219/00054Controlling or regulating the heat exchange system
    • B01J2219/00056Controlling or regulating the heat exchange system involving measured parameters
    • B01J2219/00058Temperature measurement
    • B01J2219/00063Temperature measurement of the reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00051Controlling the temperature
    • B01J2219/00074Controlling the temperature by indirect heating or cooling employing heat exchange fluids
    • B01J2219/00087Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
    • B01J2219/00094Jackets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00051Controlling the temperature
    • B01J2219/00074Controlling the temperature by indirect heating or cooling employing heat exchange fluids
    • B01J2219/00087Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
    • B01J2219/00099Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor the reactor being immersed in the heat exchange medium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00051Controlling the temperature
    • B01J2219/00074Controlling the temperature by indirect heating or cooling employing heat exchange fluids
    • B01J2219/00087Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
    • B01J2219/00103Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor in a heat exchanger separate from the reactor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00051Controlling the temperature
    • B01J2219/00074Controlling the temperature by indirect heating or cooling employing heat exchange fluids
    • B01J2219/00105Controlling the temperature by indirect heating or cooling employing heat exchange fluids part or all of the reactants being heated or cooled outside the reactor while recycling
    • B01J2219/0011Controlling the temperature by indirect heating or cooling employing heat exchange fluids part or all of the reactants being heated or cooled outside the reactor while recycling involving reactant liquids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049Controlling or regulating processes
    • B01J2219/00164Controlling or regulating processes controlling the flow
    • B01J2219/00166Controlling or regulating processes controlling the flow controlling the residence time inside the reactor vessel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/18Details relating to the spatial orientation of the reactor
    • B01J2219/185Details relating to the spatial orientation of the reactor vertical

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Animal Husbandry (AREA)
  • Zoology (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

La presente invencion describe un proceso continuo para la preparacion deácido 2-hidroxi-4-metiltiobutanoico o una sal del mismo, que incluye introducir un ácido mineral acuoso en un reactor de hidrolisis de nitrilo, que incluye un reactor de tanque agitado continuo, e introducir 2-hidroxi-4-metiltiobutanonitrilo en el reactor de hidrolisis de nitrilo. El 2-hidroxi-4-metiltiobutanonitrilo se hidroliza continuamente dentro del reactor de hidrolisis de nitrilo, para producir una corriente de producto del reactor de hidrolisis de nitrilo que contiene 2-hidroxi-4-metiltiobutanamida. La corriente de producto del reactor de hidrolisisde nitrilo se introduce continuamente en el reactor de flujo de hidrolisis de amida. La 2-hidroxi-4-metiltiobutanamida se hidroliza continuamente dentro del reactor de flujo de hidrolisis de amida, para producir un producto hidrolizado acuoso que contiene ácido 2-hidroxi-4-metiltiobutanoico. El ácido 2-hidroxi-4-metiltiobutanoico se recupera del producto hidrolizado acuoso.
MX9709477A 1995-06-07 1996-06-04 Proceso continuo de hidrolisis para preparar acido 2-hidroxi-4-metiltiobutanoico o sales del mismo. MX9709477A (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US47776895A 1995-06-07 1995-06-07
US08/647,161 US5856567A (en) 1995-06-07 1996-05-21 Continuous hydrolysis process for preparing 2-hydroxy-4-methylthiobutanioc acid or salts thereof
PCT/US1996/008527 WO1996040630A1 (en) 1995-06-07 1996-06-04 Continuous hydrolysis process for preparing 2-hydroxy-4-methylthiobutanoic acid or salts thereof

Publications (1)

Publication Number Publication Date
MX9709477A true MX9709477A (es) 1998-02-28

Family

ID=27045673

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9709477A MX9709477A (es) 1995-06-07 1996-06-04 Proceso continuo de hidrolisis para preparar acido 2-hidroxi-4-metiltiobutanoico o sales del mismo.

Country Status (14)

Country Link
US (2) US6268531B1 (es)
EP (1) EP0832062B1 (es)
JP (1) JPH11508876A (es)
CN (1) CN1094925C (es)
AR (1) AR002353A1 (es)
AU (1) AU724680B2 (es)
BR (1) BR9609182A (es)
DE (1) DE69615183T2 (es)
ES (1) ES2164244T3 (es)
MX (1) MX9709477A (es)
PL (1) PL323743A1 (es)
PT (1) PT832062E (es)
RU (1) RU2179550C2 (es)
WO (1) WO1996040630A1 (es)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5856567A (en) * 1995-06-07 1999-01-05 Novus International, Inc. Continuous hydrolysis process for preparing 2-hydroxy-4-methylthiobutanioc acid or salts thereof
JP3804210B2 (ja) * 1997-03-04 2006-08-02 住友化学株式会社 2−ヒドロキシ−4−メチルチオブタン酸の製造方法
FR2780968B1 (fr) 1998-07-10 2000-08-18 Rhone Poulenc Nutrition Animal Procede de preparation de l'acide hydroxymethylthiobutyrique
US6649794B2 (en) 2000-02-18 2003-11-18 Sumitomo Chemical Company, Limited Method for producing 2-Hydroxy-4-Methylthiobutanoic Acid
JP4517474B2 (ja) * 2000-07-25 2010-08-04 住友化学株式会社 2−ヒドロキシ−4−メチルチオブタン酸の製造方法
JP4517520B2 (ja) * 2001-02-27 2010-08-04 住友化学株式会社 2−ヒドロキシ−4−メチルチオブタン酸の製造方法
US20030089664A1 (en) * 2001-11-02 2003-05-15 Phillips Michael W. Membrane adsorber device
AU2002324369A1 (en) * 2002-09-20 2004-04-08 Avantium International B.V. Method and apparatus for performing chemical experiments
JP4696496B2 (ja) 2004-08-18 2011-06-08 住友化学株式会社 2−ヒドロキシ−4−メチルチオ酪酸の製造方法
DE102004041250A1 (de) * 2004-08-26 2006-03-02 Degussa Ag Herstellung von 2-Hydroxy-4-Methylthiobuttersäure
CN101287805B (zh) * 2005-09-06 2011-11-02 诺华丝国际股份有限公司 海洋防污涂料组合物
EP2484438A1 (en) * 2005-09-12 2012-08-08 Celanese International Corporation Loop reactor for emulsion polymerisation
RU2540618C2 (ru) * 2009-06-04 2015-02-10 ВОЛТЕЙКС, ЭлЭлСи. Устройство и способ для получения трисилиламина
CN102633699B (zh) * 2012-04-28 2013-03-06 重庆紫光天化蛋氨酸有限责任公司 Dl-甲硫氨酸的制备方法
CN108863857B (zh) * 2018-06-29 2024-04-30 浙江龙盛化工研究有限公司 对乙酰氨基苯磺酰氯降温析晶的连续稀释装置及方法
FR3115537B1 (fr) 2020-10-23 2023-01-06 Adisseo France Sas Procédé de fabrication catalytique d’un analogue de la méthionine
FR3120367B1 (fr) 2021-03-04 2024-02-16 Adisseo France Sas Procédé de préparation du 2-hydroxy-4-méthylthiobutyronitrile ou de son équivalent sélénié et applications

Family Cites Families (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443391A (en) 1945-09-26 1948-06-15 Du Pont Methionine isolation process
US2432478A (en) 1945-09-26 1947-12-09 Du Pont Synthesis of methionine
US2432429A (en) 1945-09-26 1947-12-09 Du Pont Purification of methionine
US2542768A (en) 1945-10-24 1951-02-20 Du Pont Hydroxy-methylmercaptobutyronitrile
US2485236A (en) 1945-10-24 1949-10-18 Du Pont Preparation of methionine and precursors thereof
US2557920A (en) 1946-11-07 1951-06-19 Dow Chemical Co Method for production of amino acids
US2642459A (en) 1948-12-08 1953-06-16 Dow Chemical Co Production and purification of amino acids
US2564105A (en) 1949-08-03 1951-08-14 Du Pont Aqueous methionine nitrile sulfate
US2676190A (en) 1951-10-23 1954-04-20 Du Pont Process for the manufacture of beta-methylmercapto-propionaldehyde
US2688038A (en) 1952-10-24 1954-08-31 Du Pont Hydrolysis of methionine nitrile
US2745745A (en) 1952-10-30 1956-05-15 Monsanto Chemicals Poultry feed
US2946818A (en) 1953-10-01 1960-07-26 Monsanto Chemicals Preparation of hydroxy mercapto butyric acids and derivatives thereof
US2938053A (en) * 1955-12-29 1960-05-24 Monsanto Chemicals Amino acid analogues
CH385823A (de) * 1959-09-01 1964-12-31 Inventa Ag Verfahren zur Herstellung des Calciumsalzes der a-Oxy-y-methylthio-buttersäure
US3272860A (en) 1964-04-02 1966-09-13 Monsanto Co Preparation of methionine analogues
US3773927A (en) 1971-12-20 1973-11-20 Du Pont Preparation of an aqueous slurry of ammonium chloride and methylmercapto-hydroxybutyric acid
US3968152A (en) 1972-10-06 1976-07-06 The Lummus Company Production of aromatic carboxylic acids
GB1542488A (en) 1975-10-10 1979-03-21 Bearn Sa Prod Chim Process for preparing alpha-amino-gamma-methylmercaptobutyronitrile
US4233235A (en) 1979-02-26 1980-11-11 The Procter & Gamble Company Method for making diperoxyacids
US4311803A (en) 1979-05-01 1982-01-19 Phillips Petroleum Company Continuous solution polymerization process
US4335257A (en) 1980-09-05 1982-06-15 E. I. Du Pont De Nemours And Company Preparation of the calcium salt of alpha-hydroxy-gamma-methylmercaptobutyric acid
US4310690A (en) 1980-10-08 1982-01-12 E. I. Du Pont De Nemours And Company Preparation of the calcium salt of α-hydroxy-gamma-methylmercaptobutyric acid
JPS5782339A (en) 1980-11-13 1982-05-22 Asahi Chem Ind Co Ltd Preparation of unsaturated carboxylic acid or its ester
AU1656283A (en) * 1982-07-22 1984-01-26 Gestetner Manufacturing Ltd. Stencil
US4855495A (en) 1983-09-06 1989-08-08 Monsanto Company Enhanced 2-hydroxy-4-methylthiobutanoic acid composition and method of preparation
US4524077A (en) * 1983-11-14 1985-06-18 Monsanto Company Liquid 2-hydroxy-4-methylthiobutyric acid and process for the preparation thereof
DE3465194D1 (en) 1983-11-14 1987-09-10 Monsanto Co Process for the preparation of liquid 2-hydroxy-methylthiobutyric acid
US4579962A (en) 1984-02-24 1986-04-01 Monsanto Company Enhanced 2-hydroxy-4-methylthiobutanoic acid compositions and method of preparation
FR2565225B1 (fr) 1984-06-05 1986-10-17 Centre Nat Rech Scient Procede de synthese en continu d'un a-amino-acide par hydrolyse catalytique chimique et dispositif pour la mise en oeuvre du procede
ES2005784A6 (es) * 1988-02-22 1989-03-16 Desarrollo Tecnico Ind S A Soc Un procedimiento para preparar soluciones acuosas de acido 2-hidroxi-4-metil-tiobutirico.
US5244590A (en) 1989-10-12 1993-09-14 Exxon Chemical Patents Inc. Viscosity index improver
US5068383A (en) 1990-11-09 1991-11-26 Dow Corning Corporation Catalyzed redistribution of polyorganosiloxanes
DE4110009A1 (de) 1991-03-27 1992-10-01 Basf Ag Verfahren zur herstellung von abs-formmassen
US5420304A (en) 1992-03-19 1995-05-30 Biopak Technology, Ltd. Method to produce cyclic esters
DE4236058A1 (de) 1992-10-26 1994-04-28 Basf Ag Verfahren zur radikalischen Massepolymerisation von Vinylmonomeren
US5352837A (en) * 1993-06-08 1994-10-04 Novus International, Inc. Process for the preparation of 3-(methylthio)propanal
EP0770061B1 (de) 1994-07-11 1999-04-07 Degussa Aktiengesellschaft Verfahren zur gewinnung von 2-hydroxy-4-methylthiobuttersäure (mha), mha und dessen verwendung
DE4428608C1 (de) 1994-08-12 1996-02-29 Degussa Verfahren zur Gewinnung von 2-Hydroxy-4-methylthiobuttersäure (MHA)
US5583243A (en) 1995-05-19 1996-12-10 Zinpro Corporation Salts of alpha-hydroxy aliphatic carboxylic acids and uses thereof
FR2780968B1 (fr) 1998-07-10 2000-08-18 Rhone Poulenc Nutrition Animal Procede de preparation de l'acide hydroxymethylthiobutyrique

Also Published As

Publication number Publication date
US6268531B1 (en) 2001-07-31
AR002353A1 (es) 1998-03-11
US20010001105A1 (en) 2001-05-10
WO1996040630A1 (en) 1996-12-19
JPH11508876A (ja) 1999-08-03
EP0832062B1 (en) 2001-09-12
DE69615183D1 (de) 2001-10-18
PT832062E (pt) 2002-03-28
RU2179550C2 (ru) 2002-02-20
CN1094925C (zh) 2002-11-27
EP0832062A1 (en) 1998-04-01
AU5974196A (en) 1996-12-30
BR9609182A (pt) 1999-05-11
CN1189819A (zh) 1998-08-05
DE69615183T2 (de) 2002-05-29
PL323743A1 (en) 1998-04-14
US6531101B2 (en) 2003-03-11
AU724680B2 (en) 2000-09-28
ES2164244T3 (es) 2002-02-16

Similar Documents

Publication Publication Date Title
MX9709477A (es) Proceso continuo de hidrolisis para preparar acido 2-hidroxi-4-metiltiobutanoico o sales del mismo.
MY114013A (en) Continuous hydrolysis process for preparing 2-hydroxy-4 -methylthiobutanoic acid or salts thereof
JPS5713000A (en) Preparation of optical active tryptophane
GB1452591A (en) Process for producing optically active amino acid derivatives and the corresponding optically active amino acids
EP1046634A4 (en) METHOD FOR PRODUCING BETA-HALOGEN-ALPHA-AMINO-CARBONIC ACIDS, PHENYLCYSTEINE DERIVATIVES AND THEIR INTERMEDIATES
MY112939A (en) Process
ES8605581A1 (es) Procedimiento para la hidrolisis enzimatica de una amida de d-alfa-aminoacido.
ES2020889A6 (es) Procedimiento para la preparacion de formulaciones liquidas acuosas de enzimas proteoliticamente activas con suficiente estabilidad.
IE820220L (en) Amino protected asp-phe alkyl ester
JPS56110661A (en) Preparation of n-benzyloxycarbonyl-l-aspartic acid
GB1259747A (en) Process for the preparation of aliphatic tertiary amides
TW266208B (es)
AU4048701A (en) Process for preparing alkylene diamine triacetic acid
JPS57158743A (en) Preparation of alpha-amino acid amide
JPS5668649A (en) Preparation of gamma-amino-beta-hydroxybutyric acid
GB1506067A (en) Process for producing d-carbamoyl amino acids and the corresponding d-amino acids
ES2108156T3 (es) Procedimiento de hidrodesfluoracion selectiva.
GB1550993A (en) Preparation of aliphatic and heteocyclic alphaketo carboxylic acids
ES2093404T3 (es) Proceso para preparar acido 2,6-naftalenodicarboxilico purificado.
JPS5549396A (en) Preparation of 17alpha-methylsteroid
ES2112463T3 (es) N-(acilo de cadena larga)aminonitrilo y procedimiento para su fabricacion.
CN1187184A (zh) 碱金属氨基酸的制备
WO1994004478A3 (de) Verfahren und vorrichtung zur herstellung von diglycerin
GB9008405D0 (en) Phosphonylation process
JP2826745B2 (ja) トランス―4―アミノメチルシクロヘキサンカルボン酸エステルの製造法

Legal Events

Date Code Title Description
FG Grant or registration
MM Annulment or lapse due to non-payment of fees