Process for reduction of olefinic unsaturation of pyrolysis naph

Details Process for reduction of olefinic unsaturation of pyrolysis naph Process for reduction of olefinic unsaturation of pyrolysis naph

1974-12-23

1976-04-27

Gantz, Delbert E.

Mineral oils: processes and products

Refining

Gum or gum former removal

208211, 2606839, C10G 2302, C07C 502

Patent

active

039533239

ABSTRACT:
A process is herein disclosed for decreasing olefin and diolefin unsaturation of pyrolysis naphtha (dripolene) without concomitant production of gum, heavy polymers, and/or coke; which process comprises treating pyrolysis naphtha with water at a temperature in the range of 500.degree.-700.degree.F at an elevated pressure in the range of 700-4000 psig for a residence time of from about 12 minutes to about 10 hours under conditions such that a portion of the treating water remains in the liquid phase. Treated naphtha product from said treating step, substantially reduced in olefinic and diolefinic unsaturation and essentially free of gum, heavy polymers and coke, may be hydrotreated with molecular hydrogen in the presence of a hydrogenation catalyst for further reduction of olefinic and diolefinic unsaturation and removal of sulfur compounds.

REFERENCES:
patent: 1864583 (1932-06-01), Coubrough
patent: 2238429 (1941-04-01), Brandt
patent: 2402799 (1946-06-01), Arnold et al.
patent: 3108947 (1963-10-01), Stijntjes

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