公开(公告)号：US3849339A

公开(公告)日：1974-11-19

申请号：US28891572

申请日：1972-09-14

申请人： DOW CHEMICAL CO

发明人： TURLEY R ,  CASTOR W ,  NUNNALLY K

IPC分类号： B01J23/86 ,  B01J37/00 ,  C07C5/333 ,  B01J11/22

CPC分类号： C07C5/3332 ,  B01J23/86 ,  B01J23/862 ,  B01J37/0009 ,  B01J37/0018 ,  Y10S585/906 ,  C07C15/40 ,  C07C15/46

摘要： 1. IN A PROCESS FOR PREPARING A CATALYST FOR THE DEHYDROGENATION OF ALKYL AROMATIC HYDROCARBONS TO VINYL AROMATIC HYDROCARBONS BY PREPARING A PASTE CONSISTING ESSENTIALLY OF FE2O3, CR2O3 OR AN ALKALI METAL CHROMATE OR DICHROMATE DECOMPOSIBLE TO CR2O3, AN ALKALI METAL OXIDE OR AN ALKALI METAL SALT DECOMPOSIBLE TO AN ALKALI METAL OXIDE, A BINDER AND SUFFICIENT WATER TO FORM SAID PASTE, FORMING SAID PASTE INTO PELLETS AND CALCINING SAID PELLETS INTO A FINISHED CATALYST, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS THE FE2O3 COMPONENT A MIXTURE OF HYDRATED FE2O3 AND ANHYDROUS FE2O3 WHEREIN THE HYDRATED FE2O3 IS PRESENT IN THE RANGE OF FROM ABOUT 79 PERCENT TO ABOUT 95 PERCENT OF THE TOTAL WEIGHT OF IRON OXIDES PRESENT.

公开(公告)号：US3755482A

公开(公告)日：1973-08-28

申请号：US3755482D

申请日：1972-03-24

申请人： DOW CHEMICAL CO

发明人： TURLEY R ,  NUNNALLY K ,  CASTOR W

IPC分类号： C07C5/333 ,  C07C15/10

CPC分类号： C07C5/333 ,  C07C15/46

摘要： A PROCESS FOR IMPROVING THE STYRENE YIELD IN THE CATALYTIC MULTISTAGE DEHYDROGENATION OF ETHYLBENZENE WHEREIN THE AVERAGE TEMPERATURE OF EACH STAGE IS AT LEAST 10$ C. HIGHER THAN THE PRECEDING STAGE.