Beta zeolite, method for producing same, and catalyst

Patent metadata

Field	Value
Publication number	US-11142464-B2
Application number	US-201816758200-A
Country	US
Kind code	B2
Filing date	Oct 25, 2018
Priority date	Oct 25, 2017
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

Provided is a beta zeolite also having exceptional catalytic activity as a catalyst other than an olefin epoxidation catalyst. This beta zeolite is synthesized without using an organic structure-directing agent and has titanium in the structural skeleton thereof, the Ti content being 0.10 mmol/g or higher. This beta zeolite preferably has an Si/Ti molar ratio of 20-200. Also, the Si/Al molar ratio is preferably 100 or higher.

First claim

The invention claimed is:

1. A beta zeolite comprising a titanium-containing structural skeleton and having a Ti content of 0.10 mmol/g or more, the beta zeolite being synthesized without using any organic structure-directing agent,
wherein the beta zeolite has a nitrogen adsorption isotherm at −196° C. that shows a nitrogen absorption of 100 to 175 cm 3 (STP)/g at a relative pressure P/P 0 of 0.4 and shows a nitrogen absorption of 160 to 220 cm 3 (STP)/g at a relative pressure P/P 0 of 0.9, in which P and P 0 are respectively the equilibrium pressure and the saturated vapor pressure at a temperature of −196° C.

2. The beta zeolite according to claim 1 , which has a Si/Ti molar ratio of 20 or more and 200 or less.

3. The beta zeolite according to claim 1 , which has a Si/Al molar ratio of 100 or more.

4. An oxidation catalyst comprising the beta zeolite according to claim 1 and being for use in oxidation of phenols.

5. An olefin epoxidation catalyst comprising the beta zeolite according to claim 1 .

6. A method for producing the beta zeolite according to claim 1 , comprising:
performing ion exchange on a raw material beta zeolite synthesized without using any organic structure-directing agent to form an ammonium-type beta zeolite;
then exposing the ammonium-type beta zeolite to water vapor; performing an acid treatment on the beta zeolite after the exposure; and then introducing Ti into the beta zeolite after the acid treatment.

7. The method for producing the beta zeolite according to claim 6 , wherein the Ti is introduced by treating the beta zeolite with a gaseous form of titanium chloride after the acid treatment.

8. The method for producing the beta zeolite according to claim 6 , wherein the acid treatment is performed to increase a Si/Al molar ratio of the beta zeolite to 300 or more after the exposure to water vapor.

9. A method for oxidation of phenol, comprising oxidizing the phenol using the oxidation catalyst according to claim 4 with an alcohol.

Assignees

• Mitsui Mining & Smelting Co Ltd
• Nat Univ Corp Yokohama Nat Univ

Inventors

• Kubota Yoshihiro
• Inagaki Satoshi
• Ikehara Yuya
• TAKEYAMA Mei
• Yamazaki Yasuo

Classifications

• C07C39/08

  Dihydroxy benzenes; Alkylated derivatives thereof · CPC title

• B01J29/7057

  Zeolite Beta · CPC title

• C07D301/12

  with hydrogen peroxide or inorganic peroxides or peracids · CPC title

• B01J2229/16

  to increase the Si/Al ratio; Dealumination · CPC title

• B01J2229/20

  to introduce other elements in the catalyst composition comprising the molecular sieve, but not specially in or on the molecular sieve itself · CPC title