-
1.发明授权
公开(公告)号：US4029512A
公开(公告)日：1977-06-14
申请号：US494429
申请日：1974-08-05
申请人： Karlis L. Jaunarajs , Julie C. Yang
发明人： Karlis L. Jaunarajs , Julie C. Yang
CPC分类号： C01B25/41 , C01F11/466 , C04B14/38 , C01P2004/10 , C01P2004/54 , C01P2004/61
摘要： A process is described for the formation of fibrous insoluble calcium sulfate anhydrite, the fibers thereof having specified dimensions. A dilute aqueous suspension of gypsum and, if desired, a crystal habit modifier suitable for the formation of fibrous calcium sulfate hemihydrate, is first formed. The gypsum in this suspension is then converted to the fibrous hemihydrate by reaction in the presence of saturated steam at 120.degree. C to 155.degree. C for 0.5 to 2.5 hours, thereby forming fibrous calcium sulfate hemihydrate of the desired dimensions. The fibrous hemihydrate is thereafter calcined at 500.degree. C to 750.degree. C for 0.5 to 3.0 hours to convert the fibrous hemihydrate to fibrous insoluble calcium sulfate anhydrite having substantially the same crystalline shape and dimensions.
摘要翻译： 描述了形成纤维状不溶性硫酸钙无水石膏的方法，其纤维具有特定的尺寸。 首先形成一种稀释的石膏水悬浮液，如果需要，可以形成适用于形成纤维状硫酸钙半水合物的结晶习性调节剂。 然后将该悬浮液中的石膏通过在饱和蒸汽的存在下在120℃至155℃的反应下反应0.5至2.5小时而转化为纤维状半水合物，由此形成所需尺寸的纤维状硫酸钙半水合物。 然后将纤维状半水合物在500℃至750℃下煅烧0.5至3.0小时，以将纤维状半水合物转变成具有基本上相同结晶形状和尺寸的纤维状不溶性硫酸钙无水石膏。
-
公开(公告)号：US3977890A
公开(公告)日：1976-08-31
申请号：US494425
申请日：1974-08-05
申请人： Karlis L. Jaunarajs , Julie C. Yang
发明人： Karlis L. Jaunarajs , Julie C. Yang
CPC分类号： C04B11/02
摘要： A process is described for the formation of fibrous calcium sulfate hemihydrate, the fibers thereof having specified dimensions, wherein a dilute aqueous suspension of gypsum and, if desired, a crystal habit modifier is first formed. The gypsum in the suspension is then converted into fibrous hemihydrate by reaction in the presence of saturated steam at 120.degree. to 155.degree.C for 0.5 to 2.5 hours.
摘要翻译： 描述了形成纤维状硫酸钙半水合物的方法，其纤维具有规定的尺寸，其中首先形成石膏的稀释水性悬浮液和如果需要的话，结晶习性调节剂。 然后将悬浮液中的石膏在120-155℃的饱和蒸汽存在下反应0.5至2.5小时，将其转化为纤维状半水合物。
-
公开(公告)号：US4655842A
公开(公告)日：1987-04-07
申请号：US764910
申请日：1985-08-12
申请人： Chia-Chih Ou , Julie C. Yang
发明人： Chia-Chih Ou , Julie C. Yang
CPC分类号： C04B30/00 , C04B14/208
摘要： Stable vermiculite dispersions which are substantially free of settling and a method of preparing same are provided. The dispersions are obtained by treating the vermiculite platelets of which the dispersion is comprised with citrate anion. The citrate anion functions as a swelling agent for the vermiculite and enhances the rate and extent of swelling in an aqueous medium. The swollen vermiculite is delaminated by shearing to provide the inventive dispersions, which comprise a suspension of the delaminated platelets and citrate anion.
摘要翻译： 提供基本上没有沉降的稳定的蛭石分散体及其制备方法。 通过用柠檬酸盐阴离子处理分散体的蛭石血小板获得分散体。 柠檬酸盐阴离子用作蛭石的溶胀剂，并增加水介质中溶胀的速率和程度。 肿胀的蛭石通过剪切分层以提供本发明的分散体，其包含分层的血小板和柠檬酸盐阴离子的悬浮液。
-
4.发明授权
公开(公告)号：US5116537A
公开(公告)日：1992-05-26
申请号：US734657
申请日：1991-07-23
申请人： Julie C. Yang , Charles I. Sanders
发明人： Julie C. Yang , Charles I. Sanders
CPC分类号： D21H13/44 , C04B14/206 , C04B26/02 , D21H13/36 , F01N3/2857 , Y10S106/04
摘要： A method of decreasing the expansion temperature and improving the expansion characteristics of vermiculite ore comprising subjecting vermiculite ore containing interlamellar cations to a potassium nitrate solution for a time interval sufficient to ion-exchange interlamellar cations within said ore with potassium ions. Subsequent to this ion exchange the low temperature expandable vermiculite may be expanded by heating in an oven, or incorporated in an intumescent material and heat expanded in situ, or expanded by other heating means. An intumescent sheet is provided which may be used for mounting automotive catalytic converter monoliths comprising an unexpanded vermiculite produced by the method of the invention; an inorganic fibrous material; and a binder.
摘要翻译： 一种降低膨胀温度并提高蛭石矿石的膨胀特性的方法，其包括使含有层间阳离子的蛭石矿石至硝酸钾溶液的时间间隔足以在所述矿石内与钾离子离子交换层间阳离子。 在这种离子交换之后，低温膨胀蛭石可以通过在烘箱中加热而膨胀，或者结合在膨胀材料中并在现场进行热膨胀或通过其它加热装置膨胀。 提供膨胀片，其可用于安装包含通过本发明的方法生产的未膨胀的蛭石的汽车催化转化器整料; 无机纤维材料; 和粘合剂。
-
5.发明授权Low temperature expandable vermiculite and intumescent sheet material containing same 失效低温可膨胀的VERMICULITE和INTUMESCENT SHEET材料含有它
公开(公告)号：US5079280A
公开(公告)日：1992-01-07
申请号：US436584
申请日：1989-11-15
申请人： Julie C. Yang , Charles I. Sanders
发明人： Julie C. Yang , Charles I. Sanders
CPC分类号： F01N3/2857 , C04B14/206 , C04B26/02 , D21H13/36 , D21H13/44 , C04B2111/0081
摘要： A method of decreasing the expansion temperature and improving the expansion characteristics of vermiculite ore comprising subjecting vermiculite ore containing interlamellar cations to a potassium nitrate solution for a time interval sufficient to ion-exchange interlamellar cations within said ore with potassium ions. Subsequent to this ion exchange the low temperature expandable vermiculite may be expanded by heating in an oven, or incorporated in an intumescent material and heat expanded in situ, or expanded by other heating means. An intumescent sheet is provided which may be used for mounting automotive catalytic converter monoliths comprising an unexpanded vermiculite produced by the method of the invention; an inorganic fibrous material; and a binder.
-
-
-
-
搜索结果
5 条记录 (耗时 0.018 秒)
