Title:
SOLID PHOSPHORIC ACID CATALYST, AND METHOD FOR PRODUCING TRIOXANE
Document Type and Number:
WIPO Patent Application WO/2014/185205
Kind Code:
A1
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 NH3-TPD measurement. The average specific surface area of the solid phosphoric acid catalyst preferably does not exceed 20m2/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, pyrrophosphoric acid or polyphosphoric acid, or a precursor thereof.
Inventors:
NAKAO HIROAKI (JP)
KUBOTA YUTAKA (JP)
CHEN XIN (JP)
KUBOTA YUTAKA (JP)
CHEN XIN (JP)
Application Number:
PCT/JP2014/060743
Publication Date:
November 20, 2014
Filing Date:
April 15, 2014
Export Citation:
Assignee:
CLARIANT CATALYSTS JAPAN KK (JP)
International Classes:
B01J27/182; B01J29/06; B01J35/10; B01J37/08; C07D323/06; C07B61/00
Domestic Patent References:
| WO2014017203A1 | 2014-01-30 |
Foreign References:
| JPS4430735B | ||||
| JP2005230622A | 2005-09-02 | |||
| JP2001011069A | 2001-01-16 | |||
| JPS4012898B1 | ||||
| JPS4430735B1 | ||||
| JPS5925387A | 1984-02-09 | |||
| JPS59134789A | 1984-08-02 | |||
| JPH072833A | 1995-01-06 | |||
| JP2001011069A | 2001-01-16 |
Other References:
W. K. BUSFIELD ET AL., J. CHEM. SCI (A, 1969, pages 2975
See also references of EP 2998023A4
See also references of EP 2998023A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
Download PDF:
Previous Patent: COMPONENT-EMBEDDED SUBSTRATE AND COMMUNICATION MODULE
Next Patent: DISCHARGE-ASSISTED LASER BEAM DRILLING METHOD
Next Patent: DISCHARGE-ASSISTED LASER BEAM DRILLING METHOD