| Title: | Method for producing chromic oxide by using sludge of containing chrome | ||
| Application Number: | 200410012289 | Application Date: | 2004.05.14 |
| Publication Number: | 1696064 | Publication Date: | 2005.11.16 |
| Approval Pub. Date: | Granted Pub. Date: | ||
| International Classifi-cation: | C01G37/033,C02F11/00 | ||
| Applicant(s) Name: | Gao Zhiyuan | Address: | 050021 |
| Inventor(s) Name: | Cui Guiying | ||
| Attorney & Agent: | |||
|
|
|
||
Abstract: |
|||
| A process for preparing Cr2O3 from the Cr contained sludge includes water washing, press filtering for dewatering, drying, calcining to obtain coarse Cr2O3 product, removing the water-soluble impurities by use of hot water, centrifugal drying, baking, grinding and sieving. | |||
|
|
|||
| Time: | 8 | ||
<- Previous Patent:Carrier circulating biological tr...
| Next Patent:Washing machine ->
|
|||