Hydrocarbon dewaxing process using steam-activated alkali metal zeolite catalyst
US4510045A · kind A · utility
24Cited by
15References
6Claims
0Family size
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Key dates
| Filing date | Mar 16, 1984 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | Mar 16, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2229/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a hydrodewaxing process wherein wax-containing hydrocarbon feedstock is passed over a zeolite dewaxing catalyst in the presence of hydrogen under dewaxing conditions of elevated temperature and pressure, said catalyst comprising alkali metal zeolites having a silica to alumina greater than about 12, a constraint index of about 1 to 12, and an initial alpha value less than about 2; the improvement which comprises: PA1 forming a mixture of the alkali metal zeolite with alumina and steaming the mixture at a temperature of at least about 300.degree. C. for at least two hours to increase alpha value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.