Patent ID: 11884632
Assignee: ZHEJIANG HENGYI PETROCHEMICAL RESEARCH INSTITUTE CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 18:
19. The method of claim 18, wherein the solvent A is one selected from the group consisting of methyl ethyl ether, diethyl ether, n-propyl ether, isopropyl ether, n-butyl ether, isobutyl ether, ethylene glycol dimethyl ether, vinyl ether, methyl tert-butyl ether and ethyl tert-butyl ether; and
the solvent B is at least one selected from the group consisting of n-hexane, n-heptane, n-octane, n-nonane, methylhexane, isohexane, neohexane, cyclohexane, methylcyclopentane, methylcyclohexane, isoheptane, isooctane and isononane.