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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9409159 B1

PDFFull Text
Expired
Date of Patent:
Aug. 09, 2016

Filed:

Apr. 15, 2014

Solid phosphoric acid catalyst, and method for producing trioxane

Applicant:

Clariant Catalysts (Japan) K.k., Tokyo, JP;

Inventors:

Hiroaki Nakao, Fuji, JP;

Yutaka Kubota, Fuji, JP;

Xin Chen, Toyama, JP;

Assignee:

CLARIANT CATALYSTS (JAPAN) K.K., Tokyo, JP;

Attorney:

Knobbe Martens Olson & Bear LLP

Primary Examiner:

Taofiq A Solola

Int. Cl.
CPC ...
B01J 27/182 (2006.01); C07D 323/06 (2006.01); B01J 37/08 (2006.01); B01J 21/12 (2006.01); B01J 21/16 (2006.01); B01J 27/16 (2006.01); B01J 35/02 (2006.01); B01J 35/10 (2006.01); B01J 37/02 (2006.01);
U.S. Cl.
CPC ...
B01J 27/182 (2013.01); B01J 21/12 (2013.01); B01J 21/16 (2013.01); B01J 27/16 (2013.01); B01J 35/023 (2013.01); B01J 35/1009 (2013.01); B01J 35/1014 (2013.01); B01J 37/0201 (2013.01); B01J 37/082 (2013.01); C07D 323/06 (2013.01);
Abstract

A solid phosphoric acid catalyst which, when gas-phase synthesizing trioxane from formaldehyde, results in production of trioxane at a high yield and at a high selection rate by markedly suppressing side reactions, reduces the adhesion of organic matter to the catalyst surface, and achieves a stable and long-term catalyst reaction. This solid phosphoric acid catalyst contains silicon phosphate oxide (SPO) obtained by sintering at a temperature of at least 200° C. a carrier material to which a phosphoric acid component has been added, and the total quantity of acid does not exceed 5 mmol per 1 g of solid phosphoric acid catalyst when calculated as acid quantity determined by NH-TPD measurement.

Find Patent Forward Citations

Nakao, Hiroaki. (2016). Solid phosphoric acid catalyst, and method for producing trioxane (U.S. Patent No. 9409159). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9409159

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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