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Title:
METHOD FOR PRODUCING COMPOUND
Document Type and Number:
WIPO Patent Application WO/2022/054841
Kind Code:
A1
Abstract:
The present invention provides a method capable of adequately reducing impurities and obtaining excellent separation efficiency thereof, even in a slurry having low purity of the mother liquor that includes crystals having poor solid-liquid separability. The present invention is a method for producing a compound, wherein the method for producing a compound includes a step for supplying a slurry that includes crystals of a compound to a hydraulic cleaning column, a step for extracting a circulating slurry that includes crystals from the hydraulic cleaning column and melting the crystals included in the extracted circulating slurry, and a step for returning a portion of the circulating liquid that includes the melted liquid obtained in the melting step to the hydraulic cleaning column, and an amount of the circulating liquid returned in the return step corresponding to more than 30 mass% relative to 100 mass% of the melted liquid serves as a cleaning liquid for cleaning the crystals.

Inventors:
WADA HIROKI (JP)
MUKAE MASASHI (JP)
TAKEMOTO YASUTAKA (JP)
SAKAI TOYOFUMI (JP)
Application Number:
PCT/JP2021/033037
Publication Date:
March 17, 2022
Filing Date:
September 08, 2021
Export Citation:
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Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
C07C51/25; C07C57/05
Domestic Patent References:
WO2018216699A12018-11-29
WO2010032665A12010-03-25
Foreign References:
JP2011514311A2011-05-06
JP2010059107A2010-03-18
JPH11123302A1999-05-11
JP2006069959A2006-03-16
JP2002001017A2002-01-08
JP2009530103A2009-08-27
JP2007182437A2007-07-19
JP2003530376A2003-10-14
JP2005509010A2005-04-07
JP2005509009A2005-04-07
EP1469926A12004-10-27
Other References:
VERDOES ET AL.: "High purity products by crystallisation", SPECIALITY CHEMICALS MAGAZINE, September 2009 (2009-09-01), pages 32 - 35
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (JP)
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