Abstract:
THE INSTANT PRODUCT IS A REMANUFACTURED CATALYST. USED OR SPENT BISMUTH PHOSPHOMOLYBDATE CATALYST IS REFORMULATED WITH THE ADDITION OF IRON BY COMMUNUTING SAID CATALYST WITH SUFFICIENT WATER TO FORM A PASTE, ADDING AQUEOUS AMMONIUM HEPTAMOLYBDATE SOLUTION TO SAID PASTE TO FORM A SLURRY, ADDING SAID SLURRY TO A SILICA DISPERSION IN WATER ACIDIFIED WITH PHOSPHORIC ACID, ADDING AN IRON SALT IN ACIDIC SOLUTION TO SAID SLURRY AND HOMOGENEOUSLY DISPERSING IT THEREIN TO FORM A SMOOTH MIXTURE, SPRAY-DRYING SAID MIXTURE AND CALCINING THE SPRAY-DRIED PRODUCT.
Abstract:
STEAM IS USED KEEP THE QUIESCENT ZONE ABOUT 200*F. COOLER THAN THE TURBULENT ZONE OF A FLUID-BED REACTOR UTILIZED IN THE AMMOXIDATION OF MONOOLEFINS TO UNSATURATED NITRIELS. STEAM ESCAPING FROM THE QUIESCENT ZONE INTO THE TURBULEN ZONE PREVENTS FUSION OF POWDERY CATALYST IN THE PRESENCE OF OXYGEN AND THE ADHESION OF FUSED CATALYST TO INTERNALS IN THE TOP PORTION OF THE REACTOR.
Abstract:
1. A process for conversion of chemical energy directly into electrical energy which comprises the steps of supplying an aqueous solution of hydrazine to the interface between an anode and an aqueous electrolyte in a fuel cell, supplying an oxidizing agent to the interface between a cathode and an aqueous electrolyte in said fuel cell said anode and cathode being ionically connected, and electrically connecting said anode and cathode through an electrical load.
Abstract:
A continuous process for recovering highly pure acetonitrile from crude acetonitrile containing acetonitrile, water, HCN and heavy organics, said process comprising:… (1) distilling said crude acetonitrile in a first distillation zone at a first pressure at or above 1 atmosphere to remove HCN therefrom and produce a first acetonitrile/water azeotrope and a first bottoms product containing water,… (2) distilling said first azeotrope in a second distillation zone at a second pressure less than 1 atmosphere to separate said first azeotrope into a second bottoms product containing water and a second acetonitrile/water azeotrope having a greater acetonitrile concentration than said first azeotrope, and… (3) distilling said second acetonitrile/water azeotrope in a third distillation zone at a third pressure above 1 atmosphere to produce a third acetonitrile/water azeotrope containing substantially all of the water in said second azeotrope, third bottoms product comprising acetonitrile and heavy organics and a sidestream comprising said highly pure acetonitrile. … This process enables one to obtain acetonitrile in 99+% purity. It is based upon a continuous distillation process carried out in three stages at three different pressures.
Abstract:
1313191 Iron-containing bismuth phosphomolybdate catalysts STANDARD OIL CO 17 June 1970 [24 Sept 1969] 29366/70 Heading B1E Iron-containing carrier-supported bismuth phosphomolybdate catalyst is prepared by a process which comprises the sequential steps of comminuting carrier-supported bismuth phosphomolybdate material with sufficient water to form a paste, adding an aqueous solution of ammonium heptamolybdate to the paste to form a slurry, adding the slurry to a dispersion of silica in water acidified with phosphoric acid, -dispersing an iron salt in acid solution in the resulting slurry to form a homogeneous mixture, drying the mixture and calcining the resulting dried product at a temperature below the inactivation temperature of the resulting iron-containing catalyst. As exemplified, comminuting is effected by ball-milling, the iron salt used is ferric nitrate nonahydrate acidified with nitric acid, drying is effected by spray drying to form a microspheroidal product and calcining is effected at a temperature of 1260F. The carrier-supported bismuth phosphomolybdate material may be fresh, used, spent or depleted catalyst which is intended for use, or has been used, in the annoxidation of an α,#-monoolefin, for example propylene or isobutylene, to the corresponding unsaturated nitrile, for example acrylonitrile or methacrylonitrile.