Preparation of medicinal white oils and medicinal paraffins

US4786402A · kind A · utility

Assignee

• BASF SE

Inventors

• Thomas Anstock · Bad Dürkheim, DE
• Walter Himmel
• Matthias Schwarzmann · Schifferstadt, DE
• Heinz Dreyer · Lotte, DE
• Ulrich Lebert · Hettenleidelheim, DE
• Ansgar Eisenbeis · Georgsmarienhütte, DE

Key dates

• Filing date: Aug 6, 1987
• Grant date: Nov 22, 1988
• Expiry date: Aug 6, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G67/08
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Medicinal white oils and medicinal paraffins are prepared from petroleum fractions containing aromatics and nitrogen, oxygen and sulfur compounds, e.g. light and heavy atmospheric gas oils, vacuum gas oils and residues, which have been pretreated in a first stage by acid treatment or catalytic hydrogenation, by hydrogenation in a second stage over a nickel-containing catalyst under from 50 to 200 bar and at elevated temperatures, by a process in which the catalyst used in the second stage and present in the oxide form is reduced with a hydrogen-containing gas, passivated and then again activated with hydrogen, before the hydrogenation to medicinal white oils or paraffins is carried out.