Silicon-containing environment-protective agent adsorbing radioactive metal isotopes and toxic heavy metals and a pharmaceutical composition containing same
US5264225A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 20, 1990 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Dec 20, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C1/08
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to an environment-protective agent consisting of silicon-containing minerals for adsorbing radiactive metal isotopes and toxic heavy metals, which comprises as silicon-containing minerals with a particle size of 0.001 to 0.5 mm; a natural diatomaceous earth and at least two natural zeolite minerals of the general formula EQU M.sub.x O.Al.sub.2 O.sub.3.YSiO.sub.2.7H.sub.2 O wherein PA0 M stands for sodium, potassium or calcium; PA0 x is a number between 1 and 2 inclusive of both extreme values; PA0 Y is 3 or 10; and PA0 Z is 6 or 7 treated by dilute acid, washed to neutral, dried to a constant weight at a temperature up to 115.degree.0 C. and then heat-treated at 150.degree. to 350.degree. C., preferably at 250.degree. C., where the amount of each mineral ingredient independently of each other is at least 0.1% by weight up to 99.8% by weight calculated to the total weight of the agent. The invention further relates to pharmaceutical compositions and animal foods containing the above agent according to the invention as active ingredient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.