Process for the synthesis of zeolites and mesoporous solids from a homogeneous solution in a semi-open system
US5695735A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1995 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Nov 30, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/38
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention concerns a process for the synthesis of zeolites based on element(s) T and mesoporous solids based on element(s) T, T being silicon and/or aluminium, comprising the following sequence of steps: i) synthesizing a reaction medium which is a homogeneous source of element(s) T containing: PA1 a) at least one source of element(s) T selected from the group formed by aqueous basic solutions of silica or silica and alumina and alcoholic solutions of alkyl tetraorthosilicate and trialkoxyaluminium; PA1 b) optionally, at least one structuring agent; PA1 c) optionally, seeds of the desired crystalline phase; ii) heating the reaction medium to a temperature in the range 20.degree. C. to 220.degree. C. for a period in the range several minutes and several days; iii) injecting at least one chemical agent at a controlled rate to generate polycondensable species in said medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.