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Class Information
Number: 549/490
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen as the only ring hetero atoms (class 540, subclass 1) > Oxygen containing hetero ring (e.g., dioxirane, etc.) > The hetero ring is five-membered > Having -c(=x)-, wherein x is chalcogen, bonded directly to the hetero ring > Purification or recovery of furfural
Description: Processes wherein furfural is separated from impurities or from the reaction medium.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7271210 |
Stabilized ester compositions and their use in film-forming compositions |
Sep. 18, 2007 |
| 7173142 |
Gaseous acid catalysis |
Feb. 6, 2007 |
| 6955743 |
Method for producing furfural, acetic acid and formic acid from spent pulp-cooking liquor |
Oct. 18, 2005 |
| 6603026 |
Heterocyclic compounds produced from biomass |
Aug. 5, 2003 |
| 6441237 |
Substituted 3-phenoxy- and 3-phenylalkyloxy-2-phenyl-propylamines |
Aug. 27, 2002 |
| 6441202 |
Heterocyclic compounds extracted by a hydrocarbon |
Aug. 27, 2002 |
| 6420188 |
Screening assay for the identification of inhibitors for macrophage migration inhibitory factor |
Jul. 16, 2002 |
| 6384249 |
Compounds and methods for stabilization of furfural compositions |
May. 7, 2002 |
| 5788812 |
Method of recovering furfural from organic pulping liquor |
Aug. 4, 1998 |
| 5608105 |
Production of levulinic acid from carbohydrate-containing materials |
Mar. 4, 1997 |
| 5453519 |
Process for inhibiting oxidation and polymerization of furfural and its derivatives |
Sep. 26, 1995 |
| 5332842 |
Process for inhibiting oxidation and polymerization of furfural and its derivatives |
Jul. 26, 1994 |
| 5011611 |
Method of separation of furfural from diluted aqueous solutions |
Apr. 30, 1991 |
| 4971657 |
Combined process for thermally and chemically treating lignocellulose-containing biomass and for producing furfural and cellulose-containing fiber masses |
Nov. 20, 1990 |
| 4916242 |
Combined process for thermally and chemically treating lignocellulose-containing biomass and for producing furfural |
Apr. 10, 1990 |
| 4897497 |
Lignocellulose degradation to furfural and levulinic acid |
Jan. 30, 1990 |
| 4433155 |
Inhibitors for furfurals |
Feb. 21, 1984 |
| 4401514 |
Method for the recovery of furfural, acetic acid and formic acid |
Aug. 30, 1983 |
| 4088660 |
Method for the separation and recovery of furfural and organic volatile acids, such as acetic acid and formic acid, from the process of preparation of furfural |
May. 9, 1978 |
| 4016180 |
Chemical concentration by adsorption |
Apr. 5, 1977 |
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