Method for the production of a titanium-containing zeolite
First Claim
1. Method for the production of a titanium-containing zeolite comprisinga) combining a hydrolyzable silicon compound and a hydrolyzable titanium compound, b) adding a basic quaternary ammonium compound in an aqueous medium to the mixture from a) and hydrolysing the reaction mixture at a temperature in the range from 0°
- C. to 100°
C. to form a synthesis sol, then c) heating the synthesis sol to a temperature in the range from 150°
C. to 190°
C. and d) crystallizing the synthesis sol at this temperature. characterized in that the heating-up time in step c) is less than 240 minutes.
4 Assignments
0 Petitions
Accused Products
Abstract
The present invention concerns a method for the production of a titanium-containing zeolite by: (a) combining a hydrolyzable silicon compound and a hydrolyzable titanium compound; (b) adding a basic quaternary ammonium compound in an aqueous medium to the mixture from (a) and hydrolysing the reaction mixture at a temperature in the range from 0° C. to 100° C. to form a synthesis sol; then (c) heating the synthesis sol to a temperature in the range from 150° C. to 190° C.; and (d) crystallizing the synthesis sol at this temperature, characterized in that the heating-up time in step (c) is less than 240 min.
9 Citations
12 Claims
-
1. Method for the production of a titanium-containing zeolite comprising
a) combining a hydrolyzable silicon compound and a hydrolyzable titanium compound, b) adding a basic quaternary ammonium compound in an aqueous medium to the mixture from a) and hydrolysing the reaction mixture at a temperature in the range from 0° - C. to 100°
C. to form a synthesis sol, thenc) heating the synthesis sol to a temperature in the range from 150°
C. to 190°
C. andd) crystallizing the synthesis sol at this temperature. characterized in that the heating-up time in step c) is less than 240 minutes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- C. to 100°
-
12. Method for the epoxidation of olefins comprising reacting olefins with aqueous hydrogen peroxide in a solvent miscible with water in the presence of a titanium-containing zeolite as catalyst which is obtained by
a) combining a hydrolyzable silicon compound and a hydrolyzable titanium-containing compound b) adding a basic quaternary ammonium compound in an aqueous medium to the mixture from a) and hydrolyzing the reaction mixture at a temperature in the range of from 0° - C. to 100°
C. to obtain a synthesis sol,c) heating the synthesis sol to a temperature in the range of from 150 to 190°
C.,crystallizing the synthesis sol at 150°
C. to 190°
C., separating off the titanium-containing zeolite thereby prepared, drying and calcining said zeolite wherein heating up time in c) is less than 240 minutes.
- C. to 100°
Specification
-
- Resources
-
Current AssigneeEvonik Degussa GmbH
-
Original AssigneeDegussa AG (Rag-Stiftung)
-
InventorsHasenzahl, Steffen
-
Primary Examiner(s)SAMPLE, DAVID R
-
Application NumberUS10/220,454Publication NumberTime in Patent Office1,550 DaysField of Search423/326, 423/705, 423/DIG.22, 549/531US Class Current423/326CPC Class CodesB01J 29/89 Silicates, aluminosilicates...C01B 37/005 Silicates, i.e. so-called m...C07D 301/12 with hydrogen peroxide or i...Y10S 423/22 MFI, e.g. ZSM-5. silicalite...
