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1. 发明授权

US5540907A Process for preparing high solids content titanium dioxide suspension with a dechlorinating agent 失效
标题翻译：用脱氯剂制备高固含量二氧化钛悬浮液的方法
公开(公告)号：US5540907A
公开(公告)日：1996-07-30
申请号：US380317
申请日：1995-01-30
申请人： Siegfried Blumel , Achim Hartmann , Hans Thumm , Hans-Hermann Luginsland , Franz Rosendahl
发明人： Siegfried Blumel , Achim Hartmann , Hans Thumm , Hans-Hermann Luginsland , Franz Rosendahl
IPC分类号： C09C1/36 , D21H17/67 , D21H19/38 , C01G23/00
CPC分类号： D21H19/385 , C09C1/3623 , C09C1/3653 , D21H17/675 , C01P2006/80
摘要： In the preparation of a suspension with a high content of titanium dioxide, which has been produced according to the chloride process, a finely divided titanium dioxide is slurried, in unflocculated condition without use of a dispersing agent, dechlorinated and then filtered. The content of multivalent anions can be controlled in the slurry before the filtration through suitable dechlorinating agents, particularly hydrogen peroxide and/or sodium hydrogen sulfite, and thereby the solid content in the filter cake and the consistency of the filter cake are advantageously influenced. If, on one hand, no or only few multivalent anions are present, a thixotropic filter cake with a high solids content is obtained in a pressure filtration. The filter cake is converted into a titanium dioxide suspension with a high solids content through feeding into a titanium dioxide suspension to which a dispersing agent has been added. If, on the other hand, a rigid filter cake is desired by, for example, a vacuum filtration, a minimum quantity of multivalent anions is necessary for the formation of the rigid filter cake. The solids content is, however, lowered in comparison to the thixotropic filter pastes. Where this minimum quantity of multivalent anions is exceeded, the solids content declines further. The rigid filter cakes can be rendered flowable through the direct admixing of dispersing agent. Hydrogen peroxide is particularly preferred as a dechlorinating agent.
摘要翻译：在制备根据氯化法制备的具有高含量二氧化钛的悬浮液时，将细碎的二氧化钛在不使用分散剂的情况下在未使用分散剂的情况下浆化，脱氯，然后过滤。可以通过合适的脱氯剂，特别是过氧化氢和/或亚硫酸氢钠在过滤之前，在浆料中控制多价阴离子的含量，从而有利地影响滤饼中的固体含量和滤饼的稠度。如果一方面没有或仅存在少量多价阴离子，则在压力过滤中获得具有高固体含量的触变滤饼。通过加入已加入分散剂的二氧化钛悬浮液将滤饼转化成具有高固体含量的二氧化钛悬浮液。另一方面，如果通过例如真空过滤需要刚性滤饼，则形成刚性滤饼时需要最小量的多价阴离子。然而，与触变性过滤膏相比，固体含量降低。超过这种最小量的多价阴离子时，固体含量进一步下降。刚性过滤蛋糕可以通过分散剂的直接混合使其流动。作为脱氯剂，特别优选过氧化氢。

2. 发明授权

US5393510A High solids content titanium dioxide suspension 失效
标题翻译：高固含量的二氧化钛悬浮液
公开(公告)号：US5393510A
公开(公告)日：1995-02-28
申请号：US91342
申请日：1993-07-12
申请人： Siegfried Blumel , Achim Hartmann , Hans Thumm , Hans-Hermann Luginsland , Franz Rosendahl
发明人： Siegfried Blumel , Achim Hartmann , Hans Thumm , Hans-Hermann Luginsland , Franz Rosendahl
IPC分类号： C09C1/36 , C01G23/04
CPC分类号： C09C1/3653 , C01P2006/80
摘要： A finely divided chloride process titanium dioxide prepared without the use of a dispersing agent. The slurry is dewatered via filtration, and the resulting filter cake is made flowable with an anionic dispersing agent. In order to attain a filter cake with very high solids content, the slurry should contain no, or only very few, multivalent anions. The conditions regarding the content of multivalent anions of the slurry are achieved by selection of suitable dechlorinating agents, especially hydrogen peroxide. The filter cake is thixotropic and is made flowable by the fact that it is put into the "diluted" dispersing agent, especially into a part of the titanium dioxide suspension to which the required quantity of dispersing agent has previously been added. Titanium dioxide suspensions with solids content of approximately 78% are thereby obtained and are of particular use in the paper industry.
摘要翻译：在不使用分散剂的情况下制备细分的氯化法二氧化钛。通过过滤将浆料脱水，并将所得滤饼用阴离子分散剂流动。为了获得具有非常高的固体含量的滤饼，该浆液应不含或仅含极少量的多价阴离子。关于浆料的多价阴离子含量的条件通过选择合适的脱氯剂，特别是过氧化氢来实现。滤饼是触变性的，并且可以通过将其放入“稀释”分散剂，特别是进入预先加入所需量的分散剂的二氧化钛悬浮液的一部分的事实中使其流动。因此得到固体含量约78％的二氧化钛悬浮液，并且在造纸工业中特别有用。

3. 发明授权

US5932757A Mixture of oligomers of condensed alkylalkoxysilanes 失效
标题翻译：缩合的烷基烷氧基硅烷的低聚物的混合物
公开(公告)号：US5932757A
公开(公告)日：1999-08-03
申请号：US877556
申请日：1997-06-17
申请人： Burkhard Standke , Roland Edelmann , Albert Frings , Michael Horn , Peter Jenkner , Ralf Laven , Jaroslaw Monkiewicz , Lothar Elfenthal , Hans-Hermann Luginsland
发明人： Burkhard Standke , Roland Edelmann , Albert Frings , Michael Horn , Peter Jenkner , Ralf Laven , Jaroslaw Monkiewicz , Lothar Elfenthal , Hans-Hermann Luginsland
IPC分类号： C07F7/18 , B01J2/30 , C07F7/08 , C07F7/21 , C08G77/04 , C09D183/04
CPC分类号： B01J2/30 , C07F7/0859 , C07F7/21 , C08G77/045 , C09D183/04
摘要： A mixture of oligomers of alkylalkoxysilanes condensed in the chain and/or cyclic form, said mixture of oligomers containing less than 2% by weight of free alcohols and the condensed alkoxysilanes satisfying formula I: ##STR1## wherein R is an alkyl group having 3 to 18 carbon atoms, and each R' is a member (i) selected from the group consisting of methyl, ethyl or hydrogen, or is (ii) methyl or hydrogen, or is (iii) ethyl or hydrogen, the degree of oligomerization being in the range 2.ltoreq.x.ltoreq.20 and the quotient of the molar ratio �Si/alkoxy group!.gtoreq.1; and/orsatisfying formula II: ##STR2## in which R is an alkyl group having 3 to 18 carbon atoms, and each R' is a member (i) selected from the group consisting of methyl, ethyl or hydrogen, or is (ii) methyl or hydrogen or is (iii) ethyl or hydrogen, the degree of oligomerization being x.gtoreq.3 and the quotient of the molar ratio �Si/alkoxy group!.gtoreq.1.
摘要翻译：以链和/或环状缩合的烷基烷氧基硅烷的低聚物的混合物，所述含低于2重量％游离醇的低聚物混合物和满足式I的缩合烷氧基硅烷：其中R是具有3至18个碳原子的烷基，并且每个R'是选自甲基，乙基或氢的成员（i），或（ii）甲基或氢，或（iii）乙基或氢，低聚度的范围为2 = 1的商; 和/或满足式II：其中R是具有3至18个碳原子的烷基，并且每个R'是选自甲基，乙基或氢的成员（i），或者是（ⅱ）甲基或氢或是（ⅲ）乙基或氢，低聚度为x≥3，摩尔比[Si /烷氧基]> = 1的商。

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