US 6,136,289 A · Preparation process for ferrierrite zeolite and its uses as an isomerization catalyst of linear olefin in isoolefin or as a hydrocracking and hydroisomerization paraffin catalyst

Abstract

A process of preparing a ferrierite-type zeolite, with high crystallinity rate and having a anhydrous stage composition expressed by the formula M.sub.x (AlO.sub.2).sub.x (SiO.sub.2).sub.y, M being a cation of an alkaline metal such as Na or K, or a mix of both. The process contains a gel-producing step, by addition of boric acid to an aqueous aluminum-sulfate solution mixed with a aqueous solution containing oxides of Na and/or K and of Si, without the use of a structural agent. The invention also pertains to any zeolite obtained by this process, and its uses.

Claims11

Dependent claims

Process of preparation of a ferrierite-type zeolite, with high crystallinity rate, and having an anhydrous-stage composition expressed by the formula M.sub.x (AlO.sub.2).sub.x (SiO.sub.2).sub.y, M being a cation of at least one alkali metal and the ratio y/x is between 8 and 12, said process comprising:

obtaining a gel by adding boric acid to an aqueous solution of aluminum sulfate, and mixing with an aqueous solution containing Na and/or K and Si oxides, without the use of structuring agent;
and subjecting said gel to crystallization.

Dependencies are inferred from the claim text.

Facts

Application

09/124,920Filed 30 Jul 1998

Priority

FR 97 0976831 Jul 1997

Granted

24 Oct 2000

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

C07C 5/2775
Catalytic processes: with crystalline alumino-silicates, e.g. molecular sieves
B01J 29/70
Crystalline aluminosilicate zeolites; Isomorphous compounds thereof: of types characterised by their specific structure not provided for in groups…
C01B 39/44
Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction…:…
C07C 4/06
By cracking a single hydrocarbon or a mixture of individually defined hydrocarbons or a normally gaseous hydrocarbon fraction: catalytic processes

Preparation process for ferrierrite zeolite and its uses as an isomerization catalyst of linear olefin in isoolefin or as a hydrocracking and hydroisomerization paraffin catalyst

Life of this patent

Preparation process for ferrierrite zeolite and its uses as an isomerization catalyst of linear olefin in isoolefin or as a hydrocracking and hydroisomerization paraffin catalyst

Life of this patent

Abstract

Claims11