FREMGANGSMAATE FOR AA FJERNE N-PARAFINER FRA DERES BLANDINGER MED PARAAFINSULFONSYRER.

摘要

Mixtures of C12-C18 n-paraffins with paraffinsulphonic acids having the same number of carbon atoms, water and sulphuric acid, and obtained by sulphoxidation of said paraffins with SO2 and O2 in the presence of water and UV radiation are stripped of their excess SO2 and decanted to separate most of the paraffins, and obtain a residual mixture. The residual mixture is dehydrated according to the invention until a two-phase system forms or at least until the mixture becomes turbid, and the dehydrated mixture either as such or after separating the heavier phase consisting of water and sulphuric acid is extracted with supercritical CO2, which removes with it the n-paraffins, these being reused in the sulphoxidation process.