Process for preparing ZSM-5, large pore mordenite and ZSM-35
US4687654A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1985 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Aug 5, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/25
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for preparing porous crystalline alumino-silicates consisting of bringing into contact, in an aqueous environment, sodium silicate with an aluminum derivative at a molar SiO.sub.2 /Al.sub.2 O.sub.3 ratio greater than or equal to 8, in the presence of one or more alkaline hydroxides at a molar Me.sup.+ /SiO.sub.2 ratio greater than 0.6, where Me.sup.+ represents the alkaline metal or metals, and in the presence of a mineralizing agent, operating at a temperature of between 20.degree. and 100.degree. C., and controlling the molar OH.sup.- /SiO.sub.2 ratio of the resultant mixture at a value of 0.01 and 0.8, the resultant mixture being crystallized at said molar OH.sup.- /SiO.sub.2 ratio in a closed environment for a period of between some hours and 40 days at a temperature of between 100.degree. and 200.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.