发明名称 |
PHOSPHOANHYDRITE PROCESS |
摘要 |
A wet process for producing phosphoric acid and phosphoanhydrite by acidulation of phosphate rock with a phosphoric acid/sulfuric acid mixture containing a very high recycle content of small sized anhydrite seed crystals. A strong phosphoric acid is obtained having a concentration of at least about 35% P2O5. Further, the phosphoanhydrite may be readily converted to an industrially usable gypsum product. |
申请公布号 |
DE3275536(D1) |
申请公布日期 |
1987.04.09 |
申请号 |
DE19823275536 |
申请日期 |
1982.12.14 |
申请人 |
UNITED STATES GYPSUM COMPANY |
发明人 |
GAYNOR, JOHN C.;PALMER, JAY W. |
分类号 |
C01B25/16;C01B25/223;C01B25/228;C01F1/00;C01F11/46 |
主分类号 |
C01B25/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|