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公开(公告)号:US3749792A
公开(公告)日:1973-07-31
申请号:US3749792D
申请日:1971-07-16
发明人: CROMWELL T , SPRAGUE R
摘要: BORIC OXIDE IS PRODUCED BY HEATING BORIC ACID CONTAINING UP TO ABOUT 6% ALKALI METAL CHLORIDE OR SULFATE AND FROM ABOUT 1 TO 25% FREE WATER TO A TEMPERATURE OF AT LEAST ABOUT 900*C. PREFERABLY A TEMPERATURE OF 950* TO 1100*C. IS EMPLOYED.
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公开(公告)号:US3692479A
公开(公告)日:1972-09-19
申请号:US3692479D
申请日:1968-09-10
申请人: GEOFFREY W MEADOWS , YATES PAUL C
发明人: MEADOWS GEOFFREY W , YATES PAUL C
CPC分类号: C04B35/5626 , B82Y30/00 , C01B32/949 , C01B33/06 , C01B35/04 , C01P2002/60 , C01P2004/50 , C01P2004/61 , C01P2004/62 , C01P2004/64 , C01P2006/12 , C01P2006/80 , C04B35/5607 , C04B35/5611 , C04B35/5622 , C04B35/563 , C04B35/565 , C04B35/58014 , C04B35/58064 , C04B35/58071 , C04B35/58078 , C04B35/58092
摘要: BINARY CRABIDWS, BORIDES AND SILICIDES, SUCH AS TUNGSTEN CARBIDE, HAVING AN AVERAGE PARICLE SIZE OF LESS THAN A MICRON, ARE PREPARED BY REACTING A PAIR OF SUITABLE REACTANTS SUCH AS TUNGSTIC OXIDE AND CALCIUM CARBIDE, IN A MOLTEN METAL HALIDE BATH SUCH AS SODIUM CHLORIDE, AT A TEMPERATURE OF BETWEEN 200 AND 1200*C. IN THE PRESENCE OF AN ALKALI METAL OR ALKALINE EARTH METAL REDUCING AGENT. THE BINARY COMPOUNDS THUS PRODUCED ARE PARTICULARLY USEFUL IN PREPARING HARD, DENSE REFRACTORY MATERIALS.
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公开(公告)号:US3659708A
公开(公告)日:1972-05-02
申请号:US3659708D
申请日:1968-11-04
申请人: FREEPORT SULPHUR CO
发明人: MORRIS HORTON H , OLIVIER JAMES P , ROSS SYDNEY
CPC分类号: B03B1/00
摘要: A process for beneficiating a dispersed kaolin clay mass by removing from a dispersed clay mass the contaminant which causes the formation of a thin, dull layer of yellow or brownish-yellow material, commonly referred to as ''''scum,'''' on surfaces of dried material containing the dispersed clay. The process comprises raising the pH of an aqueous dispersion of the clay to at least 12 and at that pH separating the insoluble clay from the solubilized discoloring contaminant.
摘要翻译: 通过从分散的粘土质量中除去导致在干燥材料的表面上形成通常称为“浮渣”的薄而沉闷的黄色或棕黄色材料层的污染物的方法,该方法包括 分散的粘土。 该方法包括将粘土的水性分散体的pH提高至至少12,并将该不溶性粘土与溶解的变色污染物分离。
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公开(公告)号:US3475500A
公开(公告)日:1969-10-28
申请号:US3475500D
申请日:1966-05-31
发明人: RUSSELL JOSEPH LEE
CPC分类号: C07C29/52 , C01B35/00 , C07C2601/14 , C07C35/08
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公开(公告)号:US3466147A
公开(公告)日:1969-09-09
申请号:US3466147D
申请日:1966-08-15
发明人: NIES NELSON P , SPRAGUE ROBERT W
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公开(公告)号:US3464810A
公开(公告)日:1969-09-02
申请号:US3464810D
申请日:1965-10-22
发明人: YOUNG JOHN T , JACOBS PAUL F
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公开(公告)号:US3447898A
公开(公告)日:1969-06-03
申请号:US3447898D
申请日:1966-06-20
发明人: CHEMLA MARIUS , ALFORT MAISONS , DIRIAN GREGOIRE , PERIE MICHELE
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公开(公告)号:US3424563A
公开(公告)日:1969-01-28
申请号:US3424563D
申请日:1966-02-03
申请人: DOW CHEMICAL CO
发明人: GRINSTEAD ROBERT R
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公开(公告)号:US2866687A
公开(公告)日:1958-12-30
申请号:US55458955
申请日:1955-12-21
申请人: CALLERY CHEMICAL CO
发明人: SNYDER PAUL E
IPC分类号: C01B35/00
CPC分类号: C01B35/00
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