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1. WO1996040609 - PRODUCTION OF LEVULINIC ACID FROM CARBOHYDRATE-CONTAINING MATERIALS

Publication Number WO/1996/040609
Publication Date 19.12.1996
International Application No. PCT/US1996/007231
International Filing Date 17.05.1996
Chapter 2 Demand Filed 07.01.1997
IPC
C07C 51/00 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides, or anhydrides
C07D 307/50 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
307Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
02not condensed with other rings
34having two or three double bonds between ring members or between ring members and non-ring members
38with substituted hydrocarbon radicals attached to ring carbon atoms
40Radicals substituted by oxygen atoms
46Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom
48Furfural
50Preparation from natural products
CPC
C07C 51/00
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides or anhydrides
C07D 307/50
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
DHETEROCYCLIC COMPOUNDS
307Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
02not condensed with other rings
34having two or three double bonds between ring members or between ring members and non-ring members
38with substituted hydrocarbon radicals attached to ring carbon atoms
40Radicals substituted by oxygen atoms
46Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom
48Furfural
50Preparation from natural products
Applicants
  • BIOFINE INCORPORATED [US]/[US]
Inventors
  • FITZPATRICK, Stephen, W.
Agents
  • NABINGER, Robert, C.
Priority Data
08/475,63007.06.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PRODUCTION OF LEVULINIC ACID FROM CARBOHYDRATE-CONTAINING MATERIALS
(FR) PRODUCTION EN CONTINU D'ACIDE LEVULINIQUE A PARTIR DE MATERIAUX CONTENANT DES HYDRATES DE CARBONE
Abstract
(EN)
A continuous process for producing levulinic acid from carbohydrate-containing materials in high yields is described. According to the process, a carbohydrate-containing material is supplied continuously to a first reactor and hydrolyzed at between 210 °C and 230 °C for between 13 seconds and 25 seconds in the presence of between 1 % and 5 % by weight mineral acid. The hydrolysis produces hydroxymethylfurfural, which is removed continuously from the first reactor and supplied continuously to a second reactor. In the second reactor, the hydroxymethylfurfural is hydrolyzed further at between 195 °C and 215 °C for between 15 minutes and 30 minutes to produce levulinic acid, which is continuously removed from the second reactor. The levulinic acid preferably is produced in at least 60 %, and more preferably at least 70 %, of the theoretical yield based on the hexose content of the carbohydrate-containing material.
(FR)
L'invention porte sur un procédé à haut rendement de production en continu d'acide lévulinique à partir de matériaux contenant des hydrates de carbone, selon lequel un matériau contenant des hydrates de carbone alimentant en continu un premier réacteur est hydrolysé à une température comprise entre 210 °C et 230 °C pendant 13 à 25 secondes en présence de 1 à 5 % en poids d'un acide minéral. L'hydrolyse donne un hydroxyméthylfurfural qui est extrait en continu du premier réacteur pour alimenter en continu à un second réacteur où il subit une deuxième hydrolyse à une température comprise entre 195 °C et 215 °C pendant 15 à 30 minutes, ce qui donne l'acide lévulinique qui est extrait en continu du deuxième réacteur. Ledit acide est produit à raison de 60 % et mieux de 70 % du rendement théorique calculé sur la base de la teneur en hexose du matériau contenant les hydrates de carbone.
Also published as
NO19975727
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