Gauze catalyst based on titanium or vanadium zeolites and inert gauze fabrics for accelerating oxidation reactions

• US 6,106,797 A
• Filed: 08/26/1998
• Issued: 08/22/2000
• Est. Priority Date: 02/29/1996
• Status: Expired due to Fees

• Current Assignee: BASF AG (BASF SE)
• Original Assignee: BASF AG (BASF SE)
• Inventors: Muller, Ulrich, Schulz, Michael, Grosch, Georg Heinrich, Harder, Wolfgang, Brocker, Franz Josef, Putter, Hermann, Rieber, Norbert
• Primary Examiner(s): Dunn, Tom
• Assistant Examiner(s): Ildebrando, Christina
• Application Number:
  US09/117,293
• Time in Patent Office: 727 Days
• Field of Search: 502/60, 502/64, 502/74, 423/584, 549/531, 564/300, 564/301
• US Class Current: 423/584
• CPC Class Codes: B01J 29/04 having base-exchange properties, e.g. crystalline zeolites B01J29/005 takes precedence
• CPC Class Codes: B01J 29/89 Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium B01J29/005 takes precedence
• CPC Class Codes: B01J 35/56 Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
• CPC Class Codes: B01J 37/0246 Coatings comprising a zeolite
• CPC Class Codes: C01B 15/029 Preparation from hydrogen and oxygen
• CPC Class Codes: C01B 21/1436 by reaction in the gas phase, e.g. of nitrogen, hydrogen and oxygen
• CPC Class Codes: C01B 21/1454 of hydroxylamine salts by processes not covered by one or more of groups C01B21/1418 - C01B21/1445, e.g. by conversion of one salt into another
• CPC Class Codes: C07D 301/12 with hydrogen peroxide or inorganic peroxides or peracids

Abstract

The present invention relates to a gauze catalyst based on titanium or vanadium zeolites and inert gauze fabrics which is suitable for accelerating oxidation reactions such as epoxidation of olefins, hydrogen peroxide production or hydroxylamine synthesis.

Claims

1. A gauze catalyst comprising a titanium framework zeolite having a MPI, MEL, BEA, MTW, TON, MOR structure or an MFI/MEL mixed structure, and an inert gauze fabric.

2. A gauze catalyst as claimed in claim 1, wherein the inert gauze fabric is made of metal, plastic, aluminum oxide, glass fiber, carbon fiber and/or graphite.

3. A gauze catalyst as claimed in claim 1, wherein the titanium framework zeolite has an alkali metal content of less than 500 ppm, based on the weight of the titanium framework zeolite.

4. A gauze catalyst as claimed in claim 1, wherein the titanium framework zeolite is a titanium silicalite having a zeolite structure.

5. A gauze catalyst as claimed in claim 4, further comprising from 0.01 to 30% by weight, based on the amount of the titanium silicalite having a zeolite structure, of one or more noble metals selected from the group consisting of gold, silver, rhenium, ruthenium, rhodium, palladium, osmium, iridium and platinum.

6. A gauze catalyst as claimed in claim 1, further comprising from 0.01 to 30% by weight, based on the amount of the titanium framework zeolite, of one or more noble metals selected from the group consisting of gold, silver, rhenium, ruthenium, rhodium, palladium, osmium, iridium and platinum.

7. A process for preparing a gauze catalyst as claimed in claim 1, which comprises crystallizing a titanium framework zeolite and, optionally, a noble metal or noble metal-containing compound, onto an inert gauze fabric.

8. A process for preparing an epoxide, comprising reacting oxygen or an oxygen-generating compound with an the olefin in the presence of the gauze catalyst of claim 1.

9. The process of claim 8, wherein the olefin is propylene.

10. A process for preparing hydrogen peroxide, comprising reacting hydrogen and oxygen in the presence of the gauze catalyst of claim 1.

11. A process for preparing a hydroxylamine, comprising reacting ammonia or an amine, hydrogen and oxygen, in the presence of the gauze catalyst of claim 1.