公开(公告)号：US3764495A

公开(公告)日：1973-10-09

申请号：US3764495D

申请日：1971-04-21

申请人： ALLIED CHEM

发明人： GUPTILL J ,  FOLEY G

IPC分类号： C01D1/28 ,  C02F9/00 ,  C25B9/00 ,  C01D1/08 ,  B01D19/00 ,  B01D47/00

CPC分类号： C25B9/005 ,  C01D1/28 ,  C02F9/00 ,  C02F2101/20

摘要： A METHOD FOR REMOVING MERCURY FROM A MERCURY CELL CAUSTIC SODA OR CAUSTIC POTASH SOLUTION WHEREIN A VAPOR OR GAS IS PASSED THROUGH THE SOLUTION IN THE PRESENCE OF A SMALL AMOUNT OF A REDUCING AGENT. CAUSTIC SOLUTIONS ARE OBTAINED CONTAINING AS LOW A CONCENTRATION OF MERCURY AS 0.01 PART PER MILLION. SPECIAL MEANS ARE PROVIDED FOR RECOVERY OF THE MERCURY.

公开(公告)号：US3838189A

公开(公告)日：1974-09-24

申请号：US28885572

申请日：1972-09-13

申请人： ALLIED CHEM

发明人： SOPCHAK P ,  GUPTILL J

IPC分类号： C01D7/00 ,  C01D7/22 ,  C01D7/30

CPC分类号： C01D7/00

摘要： OF SHORT DURATION TO ELIMINATE CONTAINED ORGANIC MATETER WHILE MINIMIZING SOLUBLIZATION OF CONTAINED SILICA.

TWO STEP CALCINATION PROCESS FOR PREPARING SODIUM CARBIMATE FROM TRONA, COMPRISING ALOW TEMPERATURE CALCINATION TO CONVERT THE CONTAINED SESQUICARBONATE TO SODUIM CARBONATE, FOLLOWED BY A HIGH TEMPERATURE ROASTING STEP