| 发明名称 |
METHOD FOR REDUCING HEXAVALENT CHROMIUM IN OXIDIC SOLIDS |
| 摘要 |
Process for reducing hexavalent chromium in oxidic solids, which comprises the steps:
a) mixing of the oxidic solid containing Cr(VI) with a carbon-containing compound which is liquid in the range from 20 to 100° C.,b) treatment of the mixture obtained after a) in an indirectly heated reactor at a temperature of from 700° C. to 1100° C., particularly preferably at a temperature of from 800° C. to 1000° C., under a protective atmosphere,c) cooling of the reaction product obtained after b) to at least 300° C., preferably at least 150° C., under a protective atmosphere. |
| 申请公布号 |
US2015166411(A1) |
申请公布日期 |
2015.06.18 |
| 申请号 |
US201314411618 |
申请日期 |
2013.07.05 |
| 申请人 |
LANXESS Deutschland GmbH |
发明人 |
Ortmann Rainer;Friedrich Holger;Labuschagne Chris;Van Der Merwe Dawie;Visagie Barry |
| 分类号 |
C04B14/30;C04B7/34;C08L95/00;C22B7/00 |
主分类号 |
C04B14/30 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A process for reducing hexavalent chromium in oxidic solids, the process comprising:
a) mixing of the oxidic solid containing Cr(VI) with a carbon-containing compound which is liquid in the range from 20° C. to 100° C., b) treatment of the mixture obtained after a) in an indirectly heated reactor at a temperature of from 700° C. to 1100° C. under a protective atmosphere, c) cooling of the reaction product obtained after b) to at least 300° C. under a protective atmosphere. |
| 地址 |
Cologne DE |
