公开(公告)号：US4995984A

公开(公告)日：1991-02-26

申请号：US408289

申请日：1989-09-18

Applicant: Aaron Barkatt

Inventor： Aaron Barkatt

IPC: G21F9/12 ,  B01D15/08 ,  B01J20/22 ,  B01J20/28 ,  B01J45/00 ,  C02F1/28 ,  C22B7/00 ,  C22B15/00 ,  G21F9/16

CPC classification number: B01J20/20 ,  B01D15/00 ,  B01J20/28097 ,  B01J20/3242 ,  B01J20/3244 ,  B01J20/3255 ,  B01J45/00 ,  C02F1/283 ,  C02F1/288

Abstract: Compositions comprising carbon-based supports and containing heteropolycyclic compounds such as bipyridyl, phenanthroline or derivatives thereof are used in separation of dissolved late transition metals such as Fe, Co, Ni and Cu from solutions, in particular when such solutions contain high concentrations of other dissolved metals such as Zr, Hf, La, Al and Ba. Such compositions are also used to separate late transition metals such as Pt group metals from each other.

公开(公告)号：US4648975A

公开(公告)日：1987-03-10

申请号：US833263

申请日：1986-02-27

Applicant: Aaron Barkatt ,  Pedro B. Macedo

Inventor： Aaron Barkatt ,  Pedro B. Macedo

IPC: B01J20/283 ,  B01J20/32 ,  B01D15/08

CPC classification number: B01J20/283 ,  B01J20/0229 ,  B01J20/0248 ,  B01J20/103 ,  B01J20/28004 ,  B01J20/286 ,  B01J20/3085 ,  B01J20/3092 ,  B01J20/3204 ,  B01J20/3236 ,  B01J20/3246 ,  C03C1/002 ,  C03C11/005 ,  C03C23/0095 ,  B01J2220/54 ,  B01J2220/56 ,  B01J2220/58

Abstract: Silica-based chromatographic and reactive materials are disclosed with surfaces modified to contain or to be coated with oxides, hydrous oxides, hydroxides, carbonates or silicates of aluminum, iron, or other suitable metals such as zirconium or titanium. The materials exhibit good resistance to dissolution and resulting loss of activity or clogging. This good resistance is particularly evident even in the high pH region (above 8-9) and in the high temperature region (above 35.degree. C.) where the dissolution rates and solubilities of aluminosilicates and of trivalent iron oxides are much smaller than those of silica.

Abstract translation: 公开了基于二氧化硅的色谱和反应性材料，其表面经修饰以含有氧化物，含水氧化物，氢氧化物，碳酸盐或铝，铁或其它合适的金属如锆或钛的硅酸盐。 该材料表现出良好的耐溶解性，导致活性或堵塞的损失。 即使在高pH区域（高于8-9）和高温区域（高于35℃）），这种良好的电阻也是特别明显的，其中铝硅酸盐和三价铁氧化物的溶解速率和溶解度远小于 二氧化硅。