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1. 发明专利

FR1416405A 未知
公开(公告)号：FR1416405A
公开(公告)日：1965-11-05
申请号：FR986267
申请日：1964-08-26
申请人： RAFFINAGE CIE FRANCAISE
IPC分类号： B01D11/04 , C07C7/10 , C07C17/38
摘要： Paraffin hydrocarbons are separated from their chlorinated derivatives by liquid-liquid solvent extraction using a polar and non-polar solvent. Suitable polar solvents are acetonitrile, ethylene glycol monomethyl (or ethyl) ether, diethylene glycol monomethyl (or ethyl) ether, dimethylformamide, tetrahydrofurfuryl alcohol, acetonyl acetone, acetone, N-methylpyrrolidone, benzyl alcohol, phenylethyl alcohol, methyl and ethyl ethers of propylene glycol and dipropylene glycol, acetyl acetone, propionitrile, ethyl mono- or di-ethanolamine, morpholine, diethyl-formamide, monoethyl formamide, monophenyl formamide, acetic, propionic or chloracetic acid, phenol, sulphur dioxide, epichlorhydrin and dimethyl sulphone. The non-polar solvent is a C3-C8 paraffin. In one embodiment the mixture is contacted with the two solvents introduced into the opposite ends of a contacting apparatus, the mixture being introduced in the middle; the chlorinated compounds are recovered from the polar solvent extract. In another embodiment the mixture is contacted with the polar solvent in one stage and the extract is then contacted with the non-polar solvent in a second stage, the raffinate from which is recycled with feed to the first stage, if desired after evaporating some of the non-polar solvent.ALSO:Paraffin hydrocarbons are separated from their chlorinated derivatives by liquid-liquid solvent extraction using a polar and non-polar solvent. Suitable polar solvents are acetonitrile ethylene glycol monomethyl (or ethyl) ether, diethylene glycol monomethyl (or ethyl) ether, dimethylformamide, tetrahydrofurfuryl alcohol, acetonyl acetone, acetone, N-methylpyrrolidone, benzyl alcohol, phenylethyl alcohol, methyl and ethyl ethers of propylene glycol and dipropylene glycol, acetyl acetone, propionitrile, ethyl mono- or di-ethanolamine, morpholine, diethylformamide, monoethyl formamide, monophenyl formamide, acetic, propionic or chloracetic acid, phenol, sulphur dioxide, epichlorhydrin and dimethyl sulphone. The non-polar solvent is a C3-C8 paraffin. In one embodiment the mixture is contacted with the two solvents introduced into the opposite ends of a contacting apparatus, the mixture being introduced in the middle; the chlorinated compounds are recovered from the polar solvent extract. In another embodiment the mixture is contacted with the polar solvent in one stage and the extract is then contacted with the non-polar solvent in a second stage, the raffinate from which is recycled with feed to the first stage, if desired after evaporating some of the non-polar solvent.

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