Molding of binderless zeolite, method for production thereof, and uses thereof

• US 6,521,207 B2
• Filed: 10/11/2001
• Issued: 02/18/2003
• Est. Priority Date: 06/18/1999
• Status: Expired due to Term

• Current Assignee: Nippon Shokubai Company Limited
• Original Assignee: Nippon Shokubai Company Limited
• Inventors: Oku, Tomoharu, Tsuneki, Hideaki
• Primary Examiner(s): SAMPLE, DAVID R
• Application Number:
  US09/975,472
• Publication Number:
  US 20020041845A1
• Time in Patent Office: 495 Days
• Field of Search: 423/705, 423/713, 423/716, 423/DIG.22, 423/DIG.27, 423/DIG.29, 502/61, 502/60, 502/71, 502/73, 502/77
• US Class Current: 423/705
• CPC Class Codes: B01J 2229/36 Steaming
• CPC Class Codes: B01J 29/40 of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
• CPC Class Codes: C01B 39/02 Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
• CPC Class Codes: Y10S 423/22 MFI, e.g. ZSM-5. silicalite, LZ-241
• CPC Class Codes: Y10S 423/27 Beta, e.g. NU-2
• CPC Class Codes: Y10S 423/29 MEL, e.g. ZSM-11

Abstract

A method for producing a molding of binderless zeolite by exposing to saturated steam a precursor having a tetraalkylammonium salt component, an alkali metal component, and a metal component incorporated in the crystal skeleton of zeolite supported on a molding using silica as a main component, the molding of binderless zeolite, and use of the molding as a catalyst for the production of an alkanolamine.

Claims

1. A method for the production of a molding of binderless zeolite, which comprises:

supporting on a molding of silica a raw material substance comprising a tetraalkylammonium component containing 1-5 carbon atoms in the alkyl group thereof, an alkali metal component, and, optionally a metal component to be incorporated into the crystal skeleton of zeolite to form a zeolite precursor represented by the formula (1);

2. A method according to claim 1, wherein the tetraalkylammonium is at least one member selected from the group consisting of tetra-n-propylammonium, tetrabutylammonium, and tetraethylammonium.

3. A method according to claim 1, wherein the alkali metal is at least one member selected from the group consisting of lithium, sodium and potassium.

4. A method according to claim 1, wherein the metal to be incorporated into the crystal skeleton is aluminum.

5. A method according to claim 1, wherein the metal to be incorporated into the crystal skeleton is at least one member selected from the group consisting of iron, boron, zinc, chromium, cobalt, nickel, titanium, copper, indium, and gallium.

6. A method according to claim 5, wherein the metal is at least one member selected from the group consisting of iron, boron, zinc, and gallium.

7. A method according to claim 1, wherein a temperature of the saturated steam is in the range of 80 to 260°

C.

8. A method according to claim 7, wherein the temperature is in the range of 100 to 230°

C.

9. A method according to claim 1, wherein the tetraalkylammonium component is a tetra-n-propylammonium salt and the molding of binderless zeolite is a molding of binderless zeolite of the MFI type.

10. A method according to claim 1, wherein the tetraalkylammonium component is a tetra-n-propylammonium salt and the molding of binderless zeolite is a molding of binderless zeolite of the MEL type.

11. A method according to claim 1, wherein the tetraalkylammonium component is a tetra-n-propylammonium salt and the molding of binderless zeolite is a molding of binderless zeolite of the BEA type.