Title:
Solid phosphoric acid catalyst and method for producing trioxane using it
Document Type and Number:
Japanese Patent JP6332913
Kind Code:
B2
Abstract:
Provided is a solid phosphoric acid catalyst which, when gas-phase synthesizing trioxane from formaldehyde, obtains trioxane at a high yield and at a high selection rate by markedly suppressing side reactions, and which 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 5mmol per 1g of solid phosphoric acid catalyst when calculated as acid quantity determined by NH 3 -TPD measurement. The average specific surface area of the solid phosphoric acid catalyst preferably does not exceed 20m 2 /g, the carrier is preferably selected from porous silica, aluminum hydrosilicate, or diatomaceous earth, and the SPO is preferably a dehydrated composite compound of the aforementioned carrier and a phosphoric acid selected from orthophosphoric acid, pyrophosphoric acid or polyphosphoric acid, or a precursor thereof.
Inventors:
Hiroaki Nakao
Yutaka Kubota
New
Yutaka Kubota
New
Application Number:
JP2013101541A
Publication Date:
May 30, 2018
Filing Date:
May 13, 2013
Export Citation:
Assignee:
Polyplastics Co., Ltd.
Clariant Catalyst Co., Ltd.
Clariant Catalyst Co., Ltd.
International Classes:
B01J29/85; B01J27/182; B01J35/10; B01J37/08; C07D323/06
Domestic Patent References:
| JP2014024754A | ||||
| JP44030735B1 | ||||
| JP41017453B1 | ||||
| JP47029110B1 | ||||
| JP47020082A | ||||
| JP2001199907A | ||||
| JP2005230622A | ||||
| JP9501646A |
Foreign References:
| CA771679A1 |
Attorney, Agent or Firm:
Masayuki Masabayashi
Hayashi Ichiyoshi
Hayashi Ichiyoshi
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