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公开(公告)号：US3448333A
公开(公告)日：1969-06-03
申请号：US3448333D
申请日：1966-05-31
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2.发明授权
公开(公告)号：US3617216A
公开(公告)日：1971-11-02
申请号：US3617216D
申请日：1964-12-18
CPC分类号： C01G23/07 , C01B13/28 , C01B33/183 , C01P2006/60 , C01P2006/80
摘要： There are various methods for the production of white metal oxides such as titanium dioxide in which one or more gas or vapor are heated by passage through an electric arc or electric discharge device. The electrodes have been found to introduce significant impurities into the final product. It has now been found, however, that the discoloring impurities can be very substantially reduced by having at least one of the electrodes and preferably all of the electrodes constructed from a metal such as aluminum, titanium, zirconium, or the alloys thereof or from the electrically conducting nitrides or carbides thereof. Since the impurity results from the oxidation of the electrode, it is essential that the oxides be essentially white or colorless.
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公开(公告)号：US3501262A
公开(公告)日：1970-03-17
申请号：US3501262D
申请日：1967-04-10
发明人： ARKLESS KENNETH , CLEAVER DENNIS
CPC分类号： B82Y30/00 , C01B13/28 , C01B33/183 , C01G23/07 , C01G25/02 , C01P2004/62 , C01P2004/64 , C01P2006/60
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公开(公告)号：US3463610A
公开(公告)日：1969-08-26
申请号：US3463610D
申请日：1966-05-11
IPC分类号： C01B13/22 , C01B13/24 , C01B13/26 , C01B13/28 , C01B33/18 , C01G23/07 , C01G23/06 , C09C1/36
CPC分类号： B82Y30/00 , C01B13/22 , C01B13/24 , C01B13/26 , C01B13/28 , C01B33/183 , C01G23/07 , C01P2004/51 , C01P2004/62 , C01P2004/64 , C01P2006/60
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