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公开(公告)号：US4013755A
公开(公告)日：1977-03-22
申请号：US628877
申请日：1975-11-05
申请人： Raoul Weiler , Joel Leuridan , Jozef Renier
发明人： Raoul Weiler , Joel Leuridan , Jozef Renier
CPC分类号： B01D36/00 , C22B34/1259
摘要： In the production of a solid-free solution of titanyl sulfate by digesting ilmenite or titanium slag with sulfuric acid, and filtering the resulting solid-containing solution of titanyl sulfate to separate the solids, the improvement which comprises filtering the solution under a pressure of about 1 to 16 bars to form a filter cake of a thickness of about 10 to 35 mm. The filter cake is washed with about 0.1 to 0.5 m.sup.3 of water per m.sup.3 of filtrate, the wash water is passed through the filter cake at a flow rate of about 0.1 to 1.2 m/h under a pressure of about 1 to 16 bars, and the filter cake is then squeezed to a solid content of about 50 to 70% by weight.
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公开(公告)号：US3981978A
公开(公告)日：1976-09-21
申请号：US577492
申请日：1975-05-14
申请人： Raoul Weiler , Henri Uwents
发明人： Raoul Weiler , Henri Uwents
IPC分类号： C01G23/04 , C01G23/047 , C09C1/36 , C01G23/06 , C01G23/08
CPC分类号： C01G23/0475
摘要： In the recovery of titanium dioxide by subjecting an aqueous titanium dioxide hydrate suspension to at least one stage of filtering and washing to form a washed filter cake, adjusting the composition and calcining the adjusted and washed filter cake, the improvement which comprises filtering the aqueous titanium dioxide hydrate suspension under a pressure of about 1 bar to 16 bars to form a homogeneous substantially crack-free filter cake of a thickness of about 10 to 25 mm. Advantageously a membrane filter is employed, and washing is effected under a pressure of 1 to 16 bars and a liquid flow rate of 0.1 to 1 m/h to produce a filter cake having a solids content of at least 45 % by weight.
摘要翻译： 在二氧化钛水溶液的回收中，将二氧化钛水合物悬浮液进行至少一个过滤和洗涤阶段以形成洗涤过的滤饼，调节组合物并煅烧经过调节和洗涤的滤饼，其改进包括过滤钛水溶液 二氧化碳水合物悬浮液在约1巴至16巴的压力下形成厚度为约10至25mm的均匀的基本上无裂纹的滤饼。 有利地，使用膜过滤器，并且在1至16巴的压力和0.1至1m / h的液体流速下进行洗涤以产生固体含量为至少45重量％的滤饼。
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