Process for producing gasoline of high octane number, in particular lead-free gasoline
US4270929A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1979 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | Aug 31, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P30/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for producing gasoline of high octane number from C.sub.3 and C.sub.4 olefinic cuts, such as those obtained by fractional distillation of a C.sub.3 / C.sub.4 catalytic cracking cut, comprising the steps of: PA1 (a) oligomerizing propylene of the C.sub.3 cut to obtain a first gasoline fraction, PA1 (b) reacting the isobutene of the C.sub.4 cut with methanol to produce methyl tert.-butyl ether which is separated from the unreacted C.sub.4 hydrocarbons to form a second gasoline fraction, PA1 (c) alkylating said unreacted C.sub.4 hydrocarbons with isobutane in the presence of an alkylation catalyst such as hydrofluoric acid, to form a third gasoline fraction, and PA1 (d) admixing, at least partially, said first, second and third gasoline fractions, so as to obtain gasoline of high octane number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.