Epoxidation methods and catalyst are described herein. The epoxidation catalysts generally include a metal component including silver and a support material including kaolinite, wherein the epoxidation catalyst includes less than 55 wt. % metal component.

Epoxidation methods and catalyst are described herein. The epoxidation catalysts generally include a metal component including silver and a support material including kaolinite, wherein the epoxidation catalyst includes less than 55 wt. % metal component.

The invention relates to enzymatic methods for epoxidation of a non-cyclic aliphatic alkene, or a terpene.

The invention relates to enzymatic methods for epoxidation of a non-cyclic aliphatic alkene, or a terpene.

This invention is directed to novel mixed transition metal iron (II/III) catalysts for the extraction of oxygen from CO.sub.2 and the selective reaction with organic compounds.

This invention is directed to novel mixed transition metal iron (II/III) catalysts for the extraction of oxygen from CO.sub.2 and the selective reaction with organic compounds.

A process for preparing a silver-containing catalyst for the selective oxidation of ethylene to ethylene oxide including the steps of: (a) providing a multimodal support, (b) preparing an impregnation solution comprising a silver component, (c) impregnating, at least once, the multimodal support of step (a) with the silver-containing impregnation solution of step (b) to form an impregnated support; (d) subjecting the impregnated multimodal support from step (c) to a removal means, such as a centrifuge, at least once, for a time sufficient to remove impregnated silver impregnation solution from the multimodal support and to control the amount of silver in the pores of the multimodal support by selectively removing impregnated silver impregnation solution from a set of larger pores in the multimodal support; (e) roasting, at least once, the multimodal support after the step (d); (f) optionally, repeating the impregnation step (c), (g) optionally, repeating the centrifugation step (d), and (h) optionally, repeating the calcination step (e).

A process for preparing a silver-containing catalyst for the selective oxidation of ethylene to ethylene oxide including the steps of: (a) providing a multimodal support, (b) preparing an impregnation solution comprising a silver component, (c) impregnating, at least once, the multimodal support of step (a) with the silver-containing impregnation solution of step (b) to form an impregnated support; (d) subjecting the impregnated multimodal support from step (c) to a removal means, such as a centrifuge, at least once, for a time sufficient to remove impregnated silver impregnation solution from the multimodal support and to control the amount of silver in the pores of the multimodal support by selectively removing impregnated silver impregnation solution from a set of larger pores in the multimodal support; (e) roasting, at least once, the multimodal support after the step (d); (f) optionally, repeating the impregnation step (c), (g) optionally, repeating the centrifugation step (d), and (h) optionally, repeating the calcination step (e).

A dry fire protection sprinkler in which, when a ratio of a pressure P1 of a pressurized fluid in a flexible tube to a pressure P3 of the fluid in a fluid supply line is less than a predetermined ratio of at least 3 to 1, a differential pressure controller sends a signal to a control valve to open, in order to allow the pressurized fluid in a pressurized fluid source at a pressure of P2 to enter the flexible tube, and, when the ratio of the pressure P1 of the pressurized fluid in the flexible tube to the pressure P3 of the fluid in the fluid supply line equals the predetermined ratio, the differential pressure controller sends a signal to the control valve to close.

A dry fire protection sprinkler in which, when a ratio of a pressure P1 of a pressurized fluid in a flexible tube to a pressure P3 of the fluid in a fluid supply line is less than a predetermined ratio of at least 3 to 1, a differential pressure controller sends a signal to a control valve to open, in order to allow the pressurized fluid in a pressurized fluid source at a pressure of P2 to enter the flexible tube, and, when the ratio of the pressure P1 of the pressurized fluid in the flexible tube to the pressure P3 of the fluid in the fluid supply line equals the predetermined ratio, the differential pressure controller sends a signal to the control valve to close.