Patent EP0125690A2 successfully refreshed from Google Patents.
EP0125690A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fractionation of polymerized fatty acids
Assignee: Union Camp Corp
•
Filing: 1984-05-15
•
Granted: —
•
Expires: 2004-05-15
Abstract
Abstract Polymeric fatty acids are fractionated by extraction with supercritical fluid solvents.
Inventors
- 👤 Charles Richard Frihart
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 09:39
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/48; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0203; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/54
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
A method of separating fatty acid monomer, dimer and trimer from polymerized fatty acid mixtures containing said monomer, dimer and trimer by using their different solubility in various supercritical fluids.
Claim 2
Independent Claim
30 words
A method of separating fatty acid monomer, dimer and trimer from polymerized fatty acid mixtures containing said monomer, dimer and trimer by using their different solubility in various supercritical fluids.
Claim 3
Dependent Claim
103 words
The method of claim 1 which comprises separating fatty acid monomer, dimer and trimer from polymerized fatty acid mixtures containing said monomer, dimer and trimer, by- (a) extracting one of the monomer, dimer and trimer from the mixture, in a first supercritical fluid solvent, leaving a first residue; (b) extracting one of the monomer, dimer and trimer not extracted in step (a) from the first residue in a second supercritical fluid solvent, leaving a second residue; and (c) extracting one of the monomer, dimer and trimer not extracted in steps (a) or (b) from the second residue in a third supercritical fluid solvent.
Claim 4
Dependent Claim
76 words
The method of claim 2 wherein the first supercritical fluid solvent is supercritical carbon dioxide at a temperature of circa 60°C. and under a pressure of 225 to 455 bar; the second supercritical fluid solvent is supercritical ethylene at a temperature of circa 70°C. and under a pressure of 140 to 350 bar; and the third supercritical fluid is supercritical propylene at a temperature of circa 107°C. and under a pressure of 140 to 350 bar.
Claim 5
Dependent Claim
72 words
The method of claim 1 which comprises separating fatty acid monomer, dimer and trimer from polymerized fatty acid mixtures containing said monomer, dimer and trimer, by extracting the monomer, dimer and trimer from the mixtures in a supercritical fluid solvent; and reducing the pressure and/or the temperature of said extract whereby one of said monomer, dimer and trimer becomes insoluble therein and separates from the other of said monomer, dimer and trimer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.