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US 4,684,715 AGranted
Extraction of rubber and/or resin from rubber containing plants with a monophase solvent mixture
AssigneeThe Firestone Tire & Rubber Company
InventorsEdward L. Kay, Richard Gutierrez
Life of this patent
Estimating the term…
Abstract
A process for extracting rubber and/or resin from rubber containing plants such as guayule utilizing a monophase mixture of an organic polar solvent and a hydrocarbon solvent.
Claims10
A process for extracting rubber and resin from rubber containing plants comprising the steps of:
- adding a monophase solvent to particles of the rubber containing plant, said monophase solvent comprising at least one hydrocarbon solvent, and at least one organic polar solvent, the amount of said hydrocarbon solvent ranging from about 90 to about 55 percent by weight and the amount of said organic polar solvent ranging from about 10 to about 45 percent by weight, said hydrocarbon solvent being selected from the group consisting of an alkane having from 5 to 9 carbon atoms, a cycloalkane having from 5 to 10 carbon atoms, an aromatic or an alkyl substituted aromatic compound having from 6 to 12 carbon atoms, and combinations thereof, and said polar solvent being selected from the group consisting of an alcohol having from 1 to 8 carbon atoms, an ester having from 3 to 8 carbon atoms, a ketone having from 3 to 8 carbon atoms, an ether having from 2 to 8 carbon atoms, and combinations thereof, and simultaneously extracting the rubber and the resin from said plant particles in a relatively short period of time.
Dependencies are inferred from the claim text.