Abstract: Layered adsorbent-substrate composites are prepared by methods comprising heating the surface of an aluminum substrate, contacting the surface of the substrate with a slurry containing the adsorbent and a binder, and heating the coatings to form hardened surfaces which can have excellent adsorption and mechanical properties and have a variety of uses such as adsorbents in automobile mufflers.

Abstract: A desiccant cooling apparatus and process using a solid adsorbent and refrigerant wherein the solid adsorbent is selected from the group consisting of zeolite Y-85, a low cerium rare earth exchanged Y-84 and a rare earth exchanged LZ-210, and the adsorbent is bonded directly to the heat exchange tubes within the device by a novel slip coating process resulted in significant improvements in thermal efficiency and overall performance.

Abstract: A process and apparatus for the recovery and purification of a contaminated refrigerant withdrawn from a refrigeration or refrigerant recovery system which employs a compressor and an adsorbent selective for the adsorption of halogenated hydrocarbons. The adsorbent is selected from the group consisting of silicalite, faujasites, steamed and rare earth exchanged zeolite Y, mordenite, ZSM-5 and mixtures thereof, and more particularly the group consisting of a low cerium rare earth exchanged zeolite Y-84, a low cerium rare earth exchanged zeolite LZ-210, Breck Structure Six, ECR-32, and mixtures thereof. A significant increase in the capacity of these adsorbents over conventional adsorbents combined with the use of novel process steps to recover, purify and return a purified refrigerant to the refrigeration system result in significant cost savings at reduced risk of release of halogenated hydrocarbons to the environment.

Abstract: Layered adsorbent-substrate tubes are prepared by a method comprising heating the surface of an aluminum substrate, contacting the surface of the substrate with a slurry containing the adsorbent and a binder, and heating the coatings to form hardened surfaces which can have excellent adsorption and mechanical properties in devices for cooling or heating by adsorption of refrigerating fluid on a solid adsorbent.

Abstract: Layered adsorbent-substrate tubes are prepared by a method comprising heating the surface of an aluminum substrate, contacting the surface of the substrate with a slurry containing the adsorbent and a binder, and heating the coatings to form hardened surfaces which can have excellent adsorption and mechanical properties in devices for cooling or heating by adsorption of refrigerating fluid on a solid adsorbent.

Abstract: Layered adsorbent-substrate composites are prepared by methods comprising heating the surface of an aluminum substrate, contacting the surface of the substrate with a slurry containing the adsorbent and a binder, and heating the coatings to form hardened surfaces which can have excellent adsorption and mechanical properties and have a variety of uses such as adsorbents in automobile mufflers and a desiccants in multiple pane windows.

Abstract: Layered adsorbent-substrate composites are prepared by methods comprising heating the surface of an aluminum substrate, contacting the surface of the substrate with a slurry containing the adsorbent and a binder, and heating the coatings to form hardened surfaces which can have excellent adsorption and mechanical properties and have a variety of uses such as adsorbents in automobile mufflers and as desiccants in multiple pane windows.

Abstract: This invention relates to a process for treating an exhaust gas stream from an engine, especially during cold start. The process involves a molecular sieve bed over which the cold exhaust is flowed before flowing over a catalyst bed. Pollutants such as hydrocarbons are adsorbed on the molecular sieve bed. When the molecular sieve bed reaches a temperature of about 150.degree. C., the pollutants are desorbed from the adsorbent bed and converted by the catalyst to innocuous compounds. The molecular sieves used in the process are those that selectively adsorbs pollutants, e.g., hydrocarbons versus water, and are hydrothermally stable.

Abstract: This invention relates to a process for treating an engine exhaust gas stream. The process involves first flowing the engine exhaust stream, which is relatively cool, over an adsorbent zone which comprises an adsorbent bed, i.e., a molecular sieve bed, capable of preferentially adsorbing pollutants such as hydrocarbons. This provides a first exhaust stream which is flowed over a primary castalyst which converts the pollutants to innocuous compounds and then discharging the resultant treated exhaust stream to the atmosphere. When the adsorbent bed reaches a temperature of about 150.degree. C., the entire engine exhaust stream is completely diverted over the primary catalyst. When the inlet temperature to the primary catalyst has reached about 350.degree. C., a minor portion of the engine exhaust stream is diverted over the adsorbent bed to desorb the pollutants adsorbed on the bed and carry them over the primary catalyst where they are converted to innocuous components.

Abstract: The internal corrosion of metal mufflers used in conjunction with internal combustion engines is substantially retarded by maintaining in the external void space thereof an adsorbent mass of a combination of crystalline zeolites having the crystal structure of chabazite and the crystal structure of faujasite. These adsorbent compositions exhibit a synergistic effect on corrosion retardation. Novel muffler devices per se are also disclosed.

Abstract: A non-catalytic method for extending the life of the metal parts of an automobile muffler which comprises placing an adsorbent mass, preferably of crystalline zeolitic molecular sieve, in the internal space thereof, in sufficient amount to prevent condensation of water vapor from the engine exhaust gases on the walls thereof after engine shutdown. This procedure significantly inhibits corrosion of the metal parts.