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Title:
METHOD FOR PRODUCING PHOSPHORIC DIESTER OR PHOSPHORIC TRIESTER
Document Type and Number:
WIPO Patent Application WO/2021/157129
Kind Code:
A1
Abstract:
A method for producing a phosphoric diester or a phosphoric triester is provided in which the phosphoric diester or the phosphoric triester can be produced from phosphoric acid and a hydroxy compound. Phosphoric acid and a phenol, which is used in excess with respect to the phosphoric acid, are subjected to dehydrating condensation with heating and refluxing. Water released during this dehydrating condensation is adsorbed onto a dehydrating material, which is an adsorbent derived from concrete sludge, disposed somewhere in the refluxing channel, thereby producing a phosphoric diester or a phosphoric triester.

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Inventors:
KAWAGUCHI SHIN-ICHI (JP)
SASAKI TAKESHI (JP)
HAYAKAWA YASUYUKI (JP)
Application Number:
PCT/JP2020/037458
Publication Date:
August 12, 2021
Filing Date:
October 01, 2020
Export Citation:
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Assignee:
UNIV SAGA (JP)
NIPPON CONCRETE IND CO LTD (JP)
International Classes:
C07B61/00; C07F9/09
Domestic Patent References:
WO2007097100A12007-08-30
WO2018174041A12018-09-27
Foreign References:
JPS63166894A1988-07-11
JP2008201764A2008-09-04
Attorney, Agent or Firm:
KABASAWA Satoshi et al. (JP)
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