Method of preparation of a combined ZSM-5-ferrierite aluminosilicate
US4797266A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1986 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Aug 7, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/23
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of preparation of a combined ZSM-5 and ferrierite aluminosilicate is disclosed utilizing a crystallization admixture comprising sodium silicate, a compound of aluminum, sodium oxide, water and a combination of amines comprising piperidine and an aliphatic amine selected from the group of n-butylamine and tetrapropylammonium hydroxide. The latter chosen amine is directive for a ZSM-5 aluminosilicate while the former is directive for a ferrierite aluminosilicate. Examination by Scanning Electron Microscope (SEM) demonstrates a different catalyst morphology than a catalyst synthesized using silica gel and pyridine. The resultant catalyst is useful in the dewaxing of lubricating oils, especially those oils not necessarily treatable by a unitary ferrierite or a unitary ZSM-5 catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.