Process for hjydrogenation refining petroleum wax

Abstract

The petroleum wax hydrofining process is one process in single reactor with two kinds of graded and filled catalyst. Under hydrofining condition, the petroleum wax is first contacted with Mo-Ni catalyst, the refined product is then mixed with cold hydrogen and the mixture is finally contacted with W-Ni catalyst to obtain refined product with low S and N content and low fused ring arene content. The product has obviously improved stability. The said petroleum wax material includes paraffin and microcrystalline wax, and petroleum wax product of the present invention may be used in food product,medicine and cosmetics.

Description

1. Technical field [0001] The invention relates to a petroleum wax hydrofinishing method, in particular to a hydrofinishing method using a single reactor and two kinds of catalysts graded packing. Said petroleum wax in the present invention includes paraffin wax and microcrystalline wax. 2. Background technology [0002] Petroleum wax is an important chemical raw material. The petroleum wax separated from petroleum fractions must be refined to remove a small amount of sulfur nitrogen compounds and condensed ring aromatics. The petroleum wax used in food, medicine and cosmetics must be deeply Refined in order to be harmless to the human body. [0003] Petroleum wax hydrofining is a process in which petroleum wax is refined under the action of the catalyst through a fixed bed of a single catalyst in the reactor after mixing petroleum wax and hydrogen at a hydrogen partial pressure of 2 to 16 MPa and a temperature of 230 to 360 °C. . Compared with white clay refining, petrol...

AI Technical Summary

Problems solved by technology

Both of the above two inventions use a single-reactor single-catalyst hydrofining method, and their common disadvantage is that they cannot obtain the best desulfurization and denitrogenation and aromatics saturation effects at the same time, and fail to effectively improve the stability of refined products.