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公开(公告)号:KR1019890002152B1
公开(公告)日:1989-06-21
申请号:KR1019860008245
申请日:1986-09-30
Applicant: 한국과학기술연구원
Abstract: The bleaching earth is prepd. by heat-treating kaolin (below 80 mesh, without calcination) with sulfuric acid (80-100% amts. to alumina eq. in kaolin, maintained concn. of 30-50%) under reflux temp.. Therefore, alumina content and surface area of alumina are controlled to 10-20% and 200-300 m2/g respectively.
Abstract translation: 漂白土是准备好的。 通过在回流温度下用硫酸(80-100%amts。在氧化铝当量的高岭土中,保持浓度为30-50%)将高岭土(低于80目,不经煅烧)热处理。因此,氧化铝含量和表面 氧化铝面积分别控制在10-20%和200-300 m2 / g。
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