公开(公告)号：US3819805A

公开(公告)日：1974-06-25

申请号：US13399671

申请日：1971-04-14

Applicant: ALLIED CHEM

Inventor： GRAVES C ,  SOPCHAK P

IPC: B03B7/00 ,  C01D7/37 ,  C01D7/12 ,  C01D7/24

CPC classification number: C01D7/37 ,  B03B7/00

Abstract: A PROCESS FOR BENEFICIATING TRONA ORE FOR PRODUCING SODA ASH, WHICH COMPRISES CRUSHING THE ORE, SEPARATING THE ORE BY OPTICAL-MECHANICAL SORTING MEANS, RECOVERING THE DESIRED TRONA ORE FRACTION AND CONVERTING SAID BENEFICIATED FRACTION TO SODA ASH BY CIRCULATION.

公开(公告)号：US3838189A

公开(公告)日：1974-09-24

申请号：US28885572

申请日：1972-09-13

Applicant: ALLIED CHEM

Inventor： SOPCHAK P ,  GUPTILL J

IPC: C01D7/00 ,  C01D7/22 ,  C01D7/30

CPC classification number: C01D7/00

Abstract: 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