Disclosed is a method for improving the stability of a catalyst in recycling HFC-23. The recycling is realized by means of a fluorine-chlorine exchange reaction with HFC-23 and a halogenated hydrocarbon. The catalyst for the fluorine-chlorine exchange reaction comprises a main body catalyst and a metal oxide, wherein the metal oxide is selected from at least one metal oxide of K, Na, Fe, Co, Cu, Ni, Zn or Ti, and has an addition amount of 0.1-5 wt %. The present invention has advantages such as a good catalyst stability, a long life, and a low content of by-product CFC-12.

Disclosed is a method for improving the stability of a catalyst in recycling HFC-23. The recycling is realized by means of a fluorine-chlorine exchange reaction with HFC-23 and a halogenated hydrocarbon. The catalyst for the fluorine-chlorine exchange reaction comprises a main body catalyst and a metal oxide, wherein the metal oxide is selected from at least one metal oxide of K, Na, Fe, Co, Cu, Ni, Zn or Ti, and has an addition amount of 0.1-5 wt %. The present invention has advantages such as a good catalyst stability, a long life, and a low content of by-product CFC-12.

Processes for the catalytic conversion of alcohols and/or ethers to olefins over zeolite catalysts are described. ZSM-48 and metal containing variants, such as Zn ZSM-48, produce high yields of olefins, particularly ethylene or C3+ olefins, between 200 and 500° C.

Processes for the catalytic conversion of alcohols and/or ethers to olefins over zeolite catalysts are described. ZSM-48 and metal containing variants, such as Zn ZSM-48, produce high yields of olefins, particularly ethylene or C3+ olefins, between 200 and 500° C.

A catalyst, methods of making, and process of dehydrogenating paraffins utilizing the catalyst. The catalyst includes at least 20 mass % Zn, a catalyst support and a catalyst stabilizer. The catalyst is further characterizable by physical properties such as activity parameter measured under specified conditions. The catalyst may also be disposed on a porous support in an attrition-resistant form and used in a fluidized bed reactor.

A method for disposing of a mixture of oxidizable catalyst material and inert support media. The method comprises introducing inert gas into an enclosure. The enclosure contains a plurality of stacked screens, the stacked screens have openings that decrease in size from a top of the stack to a bottom of the stack. The method also comprises introducing the mixture to an uppermost one of the plurality of stacked screens; moving the plurality of stacked screens to cause the oxidizable catalyst material to separate from and migrate to a location beneath the inert support media; conveying the separated inert support media to a location outside the enclosure for disposal as non-hazardous waste; and conveying the separated oxidizable catalyst material to a location outside the enclosure for at least one of reclamation, or thermal destruction.

A method for disposing of a mixture of oxidizable catalyst material and inert support media. The method comprises introducing inert gas into an enclosure. The enclosure contains a plurality of stacked screens, the stacked screens have openings that decrease in size from a top of the stack to a bottom of the stack. The method also comprises introducing the mixture to an uppermost one of the plurality of stacked screens; moving the plurality of stacked screens to cause the oxidizable catalyst material to separate from and migrate to a location beneath the inert support media; conveying the separated inert support media to a location outside the enclosure for disposal as non-hazardous waste; and conveying the separated oxidizable catalyst material to a location outside the enclosure for at least one of reclamation, or thermal destruction.

A process discharge gas polluted material removal device with a regenerating means of a polluted oxidation catalyst includes: an oxidation catalyst tower connected to a pipe circulating a process discharge gas including a combustible material, an organic material, an inorganic material, and nitrogen oxide and having a first temperature and having an oxidation catalyst embedded therein, the oxidation catalyst oxidizing and removing the combustible material; and a plasma reactor connected to the oxidation catalyst tower in front of the oxidation catalyst, generating a synthesis gas including hydrogen and having a high temperature of 300° C. or more by a plasma reaction, and supplying the synthesis gas including the hydrogen to the oxidation catalyst to regenerate the oxidation catalyst poisoned by the organic material and the inorganic material.

A process discharge gas polluted material removal device with a regenerating means of a polluted oxidation catalyst includes: an oxidation catalyst tower connected to a pipe circulating a process discharge gas including a combustible material, an organic material, an inorganic material, and nitrogen oxide and having a first temperature and having an oxidation catalyst embedded therein, the oxidation catalyst oxidizing and removing the combustible material; and a plasma reactor connected to the oxidation catalyst tower in front of the oxidation catalyst, generating a synthesis gas including hydrogen and having a high temperature of 300° C. or more by a plasma reaction, and supplying the synthesis gas including the hydrogen to the oxidation catalyst to regenerate the oxidation catalyst poisoned by the organic material and the inorganic material.

A gas replacement process and a gas replacement apparatus are employed, in the nitro compound hydrogenation reaction process. The gas replacement process at least includes a first step of subjecting a stream to be replaced to the gas replacement in presence of a first replacement gas, and then a second step of subjecting to the gas replacement in presence of the second replacement gas. Assuming the superficial velocity of the first replacement gas is V1, and the superficial velocity of the second replacement gas is V2, then V2/V1≥1.5.