Document Type and Number:
Japanese Patent JPS4425667
Kind Code:
B1
Abstract:
Electrical insulating oils are obtained from petroleum feedstocks in a process which includes the step of contacting the feedstock at above 340 DEG to 400 DEG C. in the presence of hydrogen with a sulphur resistant hydrogenation catalyst comprising 4-20% wt. non-oxide (calculated as Fe2O3) and 4-20% wt. molybdenum oxide (calculated as MoO3) on a refractory oxide support, for example alumina. The catalyst may also contain 1-12% wt. cobalt oxide (calculated as CoO). The hydrogenation is preferably carried out at 5-150 kg./cm.2 The space velocity may be 0.1-5 v./v./hr. The hydrogen may be used, either on a recycle or once-through basis, in an amount of 5-500 v./v. oil. A solvent extraction step, preferably using liquid sulphur dioxide, to reduce aromatics, may be introduced, for example after the hydrogenation. The product may subsequently be treated with a solid absorbent, for example clay, fuller's earth, or lime, said treatment being optionally preceded by treatment with concentrated sulphuric acid or oleum. Specifications 913,047, 913,048 and 917,345 are referred to.
Application Number:
JP1743762A
Publication Date:
October 29, 1969
Filing Date:
May 01, 1962
Export Citation:
International Classes:
B01J21/00; B01J23/88; C04B20/08; C10G17/06; C10G21/00; C10G45/08; C10G67/06; H01B3/22