发明名称 |
REGENERATING SPENT PICKLING LIQUOR |
摘要 |
Apparatus and method for regenerating spent pickling liquor from the acid pickling of a metal are disclosed. Acid pickling of a metal uses a first aci d and forms a spent pickling liquor (SPL). A second acid added to the spent pickling liquor, under specificlow temperatures produces a metal salt of the second acid. The me salt of the second acid is crystallized and removed from a regen first acid. In one aspect, hydrochloric acid is regenerated fropicklin g process for iron or steel, using sulfuric acid as the seacid, and ferrous sulfate heptahydrate crystals are produced. Regenerated hydrochloric acid is recycled to the acid pickling process.
|
申请公布号 |
CA2396452(A1) |
申请公布日期 |
2001.07.12 |
申请号 |
CA20012396452 |
申请日期 |
2001.01.04 |
申请人 |
UNITED STATES FILTER CORPORATION |
发明人 |
OLSEN, DOUGLAS R.;BLUMENSCHEIN, CHARLES D. |
分类号 |
C01B7/03;C01B7/07;C01G49/14;C23G1/36;(IPC1-7):C23G1/36;C23G1/08 |
主分类号 |
C01B7/03 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|