摘要:
A spent sulfuric acid catalyst from an alkylation unit is regenerated via a paired oxidation electrolysis, wherein active intermediates are generated via both anodic oxidation and cathodic reduction without adding an additional organic peroxide during the electrolysis. The organic impurities in the spent sulfuric acid catalyst are decomposed by the active intermediates, and removed therefrom via evaporation.
摘要:
A method for regenerating a spent sulfuric acid catalyst and recovering hydrocarbons from a spent sulfuric acid catalyst from alkylation of olefins and alkanes by using a hydrophobic supported liquid membrane is provided.
摘要:
A process to upgrade heavy oil and convert the heavy oil into lower boiling hydrocarbon products is provided. The process employs a catalyst slurry comprising catalyst particles with an average particle size ranging from 1 to 20 microns. In the upgrade process, spent slurry catalyst in heavy oil is generated as an effluent stream, which is subsequently recovered/separated from the heavy oil via membrane filtration. Residual hydrocarbons, i.e., heavy oil and solvent employed in the filtration for the heavy oil extraction are removed from the catalyst particles in a drying zone which employs at least two drying apparatuses to volatize residual hydrocarbons in the catalyst. Valuable metals can be recovered from catalyst particles for subsequent re-use in a catalyst synthesis unit, generating a fresh slurry catalyst.
摘要:
A process for regenerating a used acidic catalyst which has been deactivated by conjunct polymers by removing the conjunct polymers so as to increase the activity of the catalyst is disclosed. Methods for removing the conjunct polymers include hydrogenation, addition of a basic reagent and alkylation. The methods are applicable to all acidic catalysts and are described with reference to certain ionic liquid catalysts.
摘要:
This application discloses a process for decomposition of ammonium sulfates found in a stream comprising ammonium sulfate and slurry catalyst in oil. The ammonium sulfate is broken down into ammonia and hydrogen sulfide gas. These gases have many uses throughout the refinery, including the preparation of slurry hydroprocessing catalyst.
摘要:
A mixed metal oxide, which may be an orthorhombic phase material, is regenerated, selectively enriched or selectively poisoned as a catalyst to reduce catalyst aging for the production of unsaturated carboxylic acids, or unsaturated nitrites, from alkanes, or mixtures of alkanes and alkenes, by contacting said mixed metal oxide with a an oxidizing gas such as oxygen, air, steam and combinations thereof is permitted to flow through the catalyst in a regenerator at a temperature of from 300° C. to 600° C. to form said regenerated catalyst.
摘要:
The present invention relates to a biological process for regenerating metal-containing sulfide mitigation catalysts that are commonly known in the natural gas processing industry as liquid redox catalysts. The invention further relates to a sulfide mitigation process wherein mitigation and regeneration are performed in a single reactor under substantially anaerobic conditions. The present invention also relates to a self regenerating catalyst composition for the mitigation of sulfides.
摘要:
Catalysts having as their active component sulfides of vanadium, molybdenum and tungsten are contacted with ammonia or with an amine which in aqueous solution has a basic ionization constant greater than that of ammonium hydroxide to suppress deactivation of the catalysts by exposure to the atmosphere.
摘要:
Provided is an exhaust gas treatment catalyst including: a de-NOx catalyst; and a coating layer being provided on a surface of the de-NOx catalyst and containing at least one selected from the group consisting of alkali metal carbonates and alkaline earth metal carbonates.In a method for regenerating an exhaust gas treatment catalyst of the present invention, the coating layer of the de-NOx catalyst on which VOSO4 is deposited is removed with an acid, and after the removal of the coating layer, a coating layer containing at least one selected from the group consisting of alkali metal carbonates and alkaline earth metal carbonates is again provided.