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1. WO1996040630 - CONTINUOUS HYDROLYSIS PROCESS FOR PREPARING 2-HYDROXY-4-METHYLTHIOBUTANOIC ACID OR SALTS THEREOF

Publication Number WO/1996/040630
Publication Date 19.12.1996
International Application No. PCT/US1996/008527
International Filing Date 04.06.1996
Chapter 2 Demand Filed 27.12.1996
IPC
A23K 1/16 2006.01
AHUMAN NECESSITIES
23FOODS OR FOODSTUFFS; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
KFEEDING-STUFFS SPECIALLY ADAPTED FOR ANIMALS; METHODS SPECIALLY ADAPTED FOR PRODUCTION THEREOF
1Animal feeding-stuffs
16supplemented with accessory food factors; Salt blocks
B01J 14/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
14Chemical processes in general for reacting liquids with liquids; Apparatus specially adapted therefor
B01J 19/18 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
18Stationary reactors having moving elements inside
B01J 19/24 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
24Stationary reactors without moving elements inside
C07C 319/20 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
319Preparation of thiols, sulfides, hydropolysulfides or polysulfides
14of sulfides
20by reactions not involving the formation of sulfide groups
C07C 323/52 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
323Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
50containing thio groups and carboxyl groups bound to the same carbon skeleton
51having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton
52the carbon skeleton being acyclic and saturated
CPC
A23K 20/105
AHUMAN NECESSITIES
23FOODS OR FOODSTUFFS; THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
KFODDER
20Accessory food factors for animal feeding-stuffs
10Organic substances
105Aliphatic or alicyclic compounds
B01J 14/00
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
14Chemical processes in general for reacting liquids with liquids; Apparatus specially adapted therefor
B01J 19/18
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
18Stationary reactors having moving elements inside
B01J 19/1837
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
18Stationary reactors having moving elements inside
1812Tubular reactors
1837Loop-type reactors
B01J 19/1862
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
18Stationary reactors having moving elements inside
1862placed in series
B01J 19/1881
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
19Chemical, physical or physico-chemical processes in general; Their relevant apparatus
18Stationary reactors having moving elements inside
1868resulting in a loop-type movement
1881externally, i.e. the mixture leaving the vessel and subsequently re-entering it
Applicants
  • NOVUS INTERNATIONAL, INC. [US]/[US]
Inventors
  • HSU, Yung, C.
  • BLACKBURN, Thomas, F.
  • PELLEGRIN, Paul, F.
  • KRANZ, Allen, H.
  • WILLOCK, James, M.
Agents
  • ROEDEL, John, K., Jr.
Priority Data
08/477,76807.06.1995US
08/647,16121.05.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CONTINUOUS HYDROLYSIS PROCESS FOR PREPARING 2-HYDROXY-4-METHYLTHIOBUTANOIC ACID OR SALTS THEREOF
(FR) PROCEDE D'HYDROLYSE EN CONTINU POUR LA PREPARATION D'ACIDE 2-HYDROXY-4-METHYLTHIOBUTANOIQUE OU DE SELS DE CET ACIDE
Abstract
(EN)
A continuous process for the preparation of 2-hydroxy-4-methylthiobutanoic acid or a salt thereof which includes introducing an aqueous mineral acid into a nitrile hydrolysis reactor including a continuous stirred tank reactor and introducing 2-hydroxy-4-methylthiobutanenitrile into the nitrile hydrolysis reactor. 2-hydroxy-4-methylthiobutanenitrile is continually hydrolyzed within the nitrile hydrolysis reactor to produce a nitrile hydrolysis reactor product stream containing 2-hydroxy-4-methylthiobutanamide. The nitrile hydrolysis reactor product stream is continuously introduced into an amide hydrolysis flow reactor. 2-hydroxy-4-methylthiobutanamide is continually hydrolyzed within the amide hydrolysis flow reactor to produce an aqueous hydrolyzate product containing 2-hydroxy-4-methylthiobutanoic acid. 2-hydroxy-4-methylthiobutanoic acid is recovered from the aqueous hydrolyzate product.
(FR)
Procédé d'hydrolyse en continu pour la préparation d'acide 2-hydroxy-4-méthylthiobutanoïque ou d'un sel de cet acide, qui consiste à introduire un acide minéral aqueux dans un réacteur d'hydrolyse de nitrile, équipé d'un réservoir agité en permanence, et à introduire du thiobutanénitrile hydroxy-2 méthyl-4 dans le réacteur d'hydrolyse en nitrile. Ledit thiobutanénitrile est hydrolysé continuellement dans le réacteur d'hydrolyse de nitrile afin d'obtenir un courant de produits de réacteur d'hydrolyse de nitrile renfermant un thiobutanamide hydroxy-2 méthyl-4. Ledit courant est introduit en continu dans un réacteur de courant d'hydrolyse d'amide. Le thiobutanamide hydroxy-2 méthyl-4 est hydrolysé en continu dans le réacteur de courant d'hydrolyse d'amide pour obtenir un hydrolysat aqueux contenant l'acide 2-hydroxy-4-méthylthiobutanoïque. Cet acide est récupéré à partir de l'hydrolysat aqueux.
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