Title:
LOW α-RAY BARIUM SULFATE PARTICLES, USE METHOD THEREFOR, AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/111146
Kind Code:
A1
Abstract:
The present invention provides a production method for low α-ray barium sulfate particles, said production method being characterized in that: crushed ore obtained by crushing a barite raw ore is subjected to a step (1) in which the silica content is reduced to a predetermined value in accordance with the silica content of the crushed ore and a first product is obtained by carrying out (a) elutriation treatment, (b) sieving treatment, or (c) elutriation treatment and sieving treatment; a step (2) is then carried out in which the first product obtained by the abovementioned treatment(s) is reduced using a reducing agent and barium sulfate obtained as a second product is leached into water to obtain a barium sulfate aqueous solution; and a step (3) is then carried out in which the barium sulfate aqueous solution is subjected to chemical synthesis in order to obtain low α-ray barium sulfate particles.
Inventors:
SUEDA SATORU (JP)
OGATA HIRONOBU (JP)
OGATA HIRONOBU (JP)
Application Number:
PCT/JP2016/088593
Publication Date:
June 29, 2017
Filing Date:
December 23, 2016
Export Citation:
Assignee:
SAKAI CHEMICAL INDUSTRY CO (JP)
International Classes:
C01F11/46; C01C1/02; C01C3/06; C08K3/18; C08K9/02; C08L101/00
Domestic Patent References:
| WO2014007325A1 | 2014-01-09 |
Foreign References:
| JP2009519882A | 2009-05-21 | |||
| JP2002541051A | 2002-12-03 | |||
| JP2012513365A | 2012-06-14 | |||
| JPS5360893A | 1978-05-31 | |||
| JPH1135319A | 1999-02-09 |
Attorney, Agent or Firm:
MAKINO Itsuro (JP)
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