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US 2001/0043902 A1Published application
Catalyst system using flow-through radiation shielding and a process for producing hydrogen cyanide using the same
AssigneeRohm and Haas Company
InventorsMichael Stanley DeCourcy, Michel Gene Woody, Karen Ann Shaw, Joy Lyndon Mendoza
Life of this patent
Estimating the term…
Abstract
This invention relates to an improved catalyst system utilizing flow through radiation shielding of the reaction zone and to processes for using the catalyst system for the production of hydrogen cyanide. The process has decreased methane usage while maintaining yield of cyanide.
Claims12
A process for preparing hydrogen cyanide, comprising the steps of:
- (A) feeding reactants comprising at least one hydrocarbon, at least one nitrogen containing gas and at least one oxygen containing gas into a reactor;
- (B) pre-heating the reactants by passing the reactants through an at least partially heated radiation shield, comprising one or more pieces of a flowthrough ceramic material, into a reaction zone, the radiation shield having been at least partially heated by absorbing at least a portion of radiant energy produced in the reaction zone;
- (C) reacting the reactants at a temperature of 800° C. to 1400° C. in the presence of a platinum group metal catalyst disposed within the reaction zone to produce hydrogen cyanide;
- (D) monitoring the temperature of the reaction zone;
- and
- (E) adjusting the oxygen content of the reactants to maintain the reaction temperature within a range of 800° C. to 1400° C.
3 more elements
A catalyst system for use in a high temperature chemical process, comprising:
- (A) a reaction zone having a catalyst disposed therein;
- (B) a flow through radiation shield comprising one or more pieces of a flowthrough ceramic material disposed upstream of the reaction zone for
- (i) absorbing at least a portion of radiant energy produced in the reaction zone, and
- (ii) transferring heat formed from absorbing the radiant energy to reactants flowing therethrough into the reaction zone;
- and
- (C) one or more temperature sensing devices disposed within the reaction zone.
3 more elements
The catalyst system of claim 9, wherein the one or more pieces of ceramic foam tiles are fitted to one another at least on one side.
Dependencies are inferred from the claim text.