摘要:
A method of regenerating an acidic catalyst is described. A silane compound is contacted with an acidic catalyst that contains conjunct polymer, which releases the conjunct polymer from the acidic catalyst. The acidic catalyst can then be re-activated with acid. The conjunct polymer can be separated from the silane compound, and the silane compound can be recycled.
摘要:
A method for removing iron, calcium and various metals from coal fire generated catalysts. With the use of urea sulfate, urea hydrochloride and/or pH lowering compound in combination with a reducing compound, and chelating compound, the cleaning redeposition problem can be solved while minimizing the environmental impact from process chemicals. The urea sulfate or urea hydrochloride along with a reducing compound will solubilize, then converts, the metals into a form that will allow the chelate compound to safely remove the metals from the Catalyst. The solubilized metals are combined with the chelate to form an inert compound that will not redeposit back onto the substrate, thereby, allowing the materials to be removed from the system safely and efficiently with shorter process times.
摘要:
A process for slurry hydrocracking catalyst recovery is described. In one embodiment, the process includes separating effluent from a slurry hydrocracking zone into a first portion comprising solvent and clarified pitch and a second portion comprising pitch and catalyst. The second portion is contacted with an acid to leach the catalyst out of the pitch forming an aqueous solution and pitch residue. The aqueous solution is contacted with an anion to form an insoluble salt which is the catalyst.
摘要:
This invention is directed to a process for removing a catalyst inhibitor from a substrate or catalytic converter containing at least one nitrogen oxide (NO x ) catalyst using a phosphoric acid composition. The process is particularly suited for removing the catalyst inhibitor, arsenic, from a fly ash-coated substrate or converter. A substantial amount of catalyst inhibitor can be removed from a fly ash-coated catalytic converter without removing a significant portion of one or more of the NO x reduction catalysts in or on the substrate.
摘要:
A method and apparatus for catalytic production of carbon nanotubes. Catalytic particles are exposed to different process conditions at successive stages wherein the catalytic particles do not come in contact with reactive (catalytic) gases until preferred process conditions have been attained, thereby controlling the quantity and form of carbon nanotubes produced. The method also contemplates methods and apparatus which recycle and reuse the gases and catalytic particulate materials, thereby maximizing cost efficiency, reducing wastes, reducing the need for additional raw materials, and producing the carbon nanotubes, especially SWNTs, in greater quantities and for lower costs.
摘要:
An aqueous epoxidation process stream containing molybdenum and sodium values is incinerated and an aqueous solution containing molybdenum and sodium is recovered, acidified and reacted with a calcium compound without first adding base to form solid CaMoO4 which is separated.
摘要:
A method of performing an oxidation reaction in liquid phase which comprises contacting a reactant in the liquid phase with a gaseous source of oxygen in the presence of a metallic oxidation reaction catalyst embedded in a polymeric matrix to provide an oxidation product of the reactant, also a method for regenerating deactivated metallic oxidation reaction catalyst which comprises treating the catalyst in oxidizing acid to remove absorbed poisons, said acid treatment resulting in at least partial oxidation of the metallic catalyst, and subjecting the acid treated catalyst to a reducing agent.