Process for the dewaxing of hydrocarbon fractions
US4572779A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 10, 1984 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Feb 10, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2229/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for improving the fluidity of hydrocarbon fractions by dewaxing thereof. In the present process, hydrocarbon fractions are contacted with hydrogen in the presence of a specific type of catalyst, thereby lowering the pour point of the hydrocarbon fraction. The catalyst comprises a specific type of zeolite which is defined by a specific X-ray diffraction pattern and which has a predetermined range of mesitylene adsorption of not less than 1.6 wt %. The zeolite catalyst is obtained by providing an aqueous reaction mixture of SiO.sub.2, Al.sub.2 O.sub.3, an alkaline source as OH.sup.-, and a carboxyl group-containing organic compound having the following composition: ______________________________________ SiO.sub.2 /Al.sub.2 O.sub.3 20-60 H.sub.2 O/SiO.sub.2 5-100 OH.sup.- /SiO.sub.2 0.1-0.35 ______________________________________ and reacting the mixture until crystals are produced. Advantageously, the ratio of the carboxyl group-containing organic compound to aluminum oxide is about 1.0 to 100.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.