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公开(公告)号：US06235533B1
公开(公告)日：2001-05-22
申请号：US09040633
申请日：1998-03-18
IPC分类号： G01N3300
CPC分类号： G01N33/24 , G01N33/383
摘要： A method of determining a quantity of amorphous SiC2-containing impurities in a montmorillonite clay sample comprising the steps of: (a) analyzing the clay sample to determine the weight percent of SiO2 contained in the clay sample; (b) analyzing the clay sample for non-montmorillonite SiO2-containing crystalline components; (c) calculating the weight percent of SiO2 from step (a) that is derived from the montmorillonite and amorphous SiQ2-containing impurities by lowering the weight percent of SiO2 in step (a) based on the non-montmorillonite SiO2-containing crystalline impurities found in step (b); and (d) determining the amorphous SiO2-containing impurity portion of the SiO2 calculated in step (c) by further lowering the amount of SiO2 from step (c) until the amount of montmorillonite-derived SiO2 is consistent with one or more properties of the clay sample, the amount of further lowering being proportional to an amount of amorphous SiO2-containing impurities contained in the clay sample.
摘要翻译： 一种测定蒙脱石粘土样品中含无定形SiC 2的杂质的量的方法，包括以下步骤：（a）分析粘土样品以确定粘土样品中所含的SiO 2的重量百分比;（b）分析粘土样品 非蒙脱土SiO 2的结晶成分;（c）通过降低步骤（a）中SiO 2的重量百分比来计算源自蒙脱土和含有无定形SiQ 2的杂质的步骤（a）中SiO 2的重量百分比，基于 在步骤（b）中发现的非蒙脱石SiO 2结晶杂质; 和（d）通过进一步降低步骤（c）中的SiO 2的量直到由蒙脱石衍生的SiO 2的量与所述SiO 2的一个或多个性质一致来确定在步骤（c）中计算出的SiO 2的无定形SiO 2杂质部分 粘土样品，进一步降低的量与粘土样品中所含的无定形SiO 2杂质的量成比例。
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2.发明授权
公开(公告)号：US6050509A
公开(公告)日：2000-04-18
申请号：US40639
申请日：1998-03-18
CPC分类号： C01B33/40 , C09C1/42 , C01P2004/51 , C01P2004/53 , C01P2004/61 , C01P2006/80
摘要： A clay purification process, for removing impurities recovered with the clay, particularly a montmorillonite clay, includes the steps of separating the clay from rocks and other large non-clay impurities; dispersing the clay and smaller impurities in water, preferably at a concentration of at least about 4% by weight clay, based on the total weight of clay and water, more preferably about 6-10% by weight clay in water, to provide a clay slurry; passing the clay slurry through a series of hydrocyclones to remove the larger particles (impurities) while retaining clay particles having a size of about 100 microns or less, particularly about 80 microns or less; ion exchanging the clay to remove at least about 95% of the interlayer, multivalent (e.g., divalent and trivalent) cations in an ion exchange column, wherein the multivalent ions are replaced by monovalent cations, such as sodium, lithium and/or hydrogen; and then centrifuging the clay to remove a majority of the particles having a size in the range of about 0.5 .mu.m to about 100 .mu.m.
摘要翻译： 用于去除用粘土，特别是蒙脱土粘土回收的杂质的粘土净化方法包括将粘土与岩石和其它大的非粘土杂质分离的步骤; 基于粘土和水的总重量，更优选将粘土和较小的杂质分散在水中，优选以至少约4重量％的粘土的浓度，更优选约6-10重量％的粘土在水中，以提供粘土 泥浆; 使粘土浆通过一系列水力旋流器以除去较大的颗粒（杂质），同时保留尺寸为约100微米或更小，特别是约80微米或更小的粘土颗粒; 离子交换粘土以在离子交换柱中除去至少约95％的中间层，多价（例如二价和三价）阳离子，其中多价离子被一价阳离子如钠，锂和/或氢代替; 然后离心粘土以除去尺寸在约0.5μm至约100μm的范围内的大部分颗粒。
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3.发明授权Process for purifying clay by the hydrothermal conversion of silica impurities to a dioctahedral or trioctahedral smectite clay 失效通过将二氧化硅杂质水热转化为二八面体或三八面体蒙脱石粘土来净化粘土的方法
公开(公告)号：US6090734A
公开(公告)日：2000-07-18
申请号：US40638
申请日：1998-03-18
CPC分类号： C01B33/40
摘要： A hydrothermal reaction which dissolves the amorphous silica and the crystalline silica impurities contained in a recovered, naturally occurring montmorillonite clay, and subsequently converts the dissolved silicas into a dioctahedral and/or trioctahedil smectite clay. The dissolution of silica is accomplished by adjusting the pH of an aqueous slurry of the recovered clay to a value of about 8.5 to about 10.0, preferably about 9.0 to about 9.5, at a temperature of at least about 150.degree. C., preferably about 180.degree. C. to about 250.degree. C., more preferably about 190.degree. C. to about 235.degree. C. Dissolved silica reacts with stoichiometric amounts of aluminum and/or magnesium and/or sodium added to the slurry, while at a temperature of at least about 150.degree. C., preferably about 185.degree. C. to about 250.degree. C., and at a pressure of at least about 200 bars, to synthesize a dioctahedral smectite clay from the dissolved silica; or the dissolved silica reacts with stoichiometric amounts of lithium and/or magnesium and/or sodium added to the slurry, at the same conditions, to form a trioctahedral smectite clay.
摘要翻译： 一种水热反应，其溶解回收的天然蒙脱土粘土中所含的无定形二氧化硅和结晶二氧化硅杂质，随后将溶解的二氧化硅转化为二八面体和/或三八面体蒙皂石粘土。 二氧化硅的溶解通过在至少约150℃，优选约180℃的温度下将回收的粘土的水性浆料的pH调节至约8.5至约10.0，优选约9.0至约9.5的值来实现 约250℃，更优选约190℃至约235℃。溶解的二氧化硅与化学计量的铝和/或镁和/或钠加入到浆料中，同时在 至少约150℃，优选约185℃至约250℃，并且在至少约200巴的压力下，从溶解的二氧化硅合成二八面体蒙皂石粘土; 或者溶解的二氧化硅在相同条件下与化学计量的锂和/或镁和/或钠反应，从而形成三八面体绿土粘土。
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