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Alan P Cohen

Stephen R Dunne

Albert S Behan

Michael J McKeon

Maryellen Lavin

Jack E Hurst

John D Sherman

Mark T Staniulis

Philip Connolly

Thomas J Dangieri

Medhat K Tannous

Vladislav Ivanov Kanazirev

Robert C Williams, Iii

Thomas R Cannan

Richard J Hinchey

Rustam H Sethna

Peter Rumfola, Iii

Nanette Greenlay

MaryEllen Lavin

The invention comprises a temperature swing adsorption system for providing dry air to an air brake system. More particularly, there is provided a desiccant wheel upstream of the air compressor to dry air prior to its compression.

Brake air drying using low pressure desiccant wheel

A method is provided for production of low dust adsorbents and catalysts. A thin layer of metal oxide derived from a colloidal solution of the oxide is deposited on the adsorbent or catalyst particle, which greatly improves the physical properties of the particle with regards to attrition and dust formation while retaining the adsorbent and catalytic properties of the particle. The method is applicable to a variety of porous refractory oxides. For example, treatment with colloidal silica improves greatly the physical stability of alumina adsorbents.

Low dust adsorbents and catalysts and method for preparation

Difluoromethane (R-32) is of current interest as a partial replacement for chlorodifluoromethane (R-22) refrigerant heretofore widely used in vapor compression refrigeration systems. R-32 has, however, proved to be more reactive than is desirable with the zeolite A adsorbent-desiccant compositions used in such systems to prevent corrosion and freeze-up problems. The potassium cation form of a zeolite A molecular sieve&mdash;with at least 60 percent of the sodium cations replaced with potassium ions, agglomerated with a clay binder, and pore-reduced to essentially exclude the adsorption of R-32 having essentially no reactivity with difluoromethane, and having a surface ratio of silicon to aluminum of less than about 1.7 mol/mol as determined by X-ray photoelectron spectroscopy&mdash;has been found to be an effective desiccant for refrigerants comprising difluoromethane.

Desiccant for drying CH2F2 refrigerant utilizing zeolite

Process for drying CH2F2 refrigerant utilizing zeolite

Difluoromethane (R-32) is of current interest as a partial replacement for chlorodifluoromethane (R-22) refrigerant heretofore widely used in vapor compression refrigeration systems. R-32 has, however, proved to be more reactive than is desirable with the zeolite A adsorbent-desiccant compositions used in such systems to prevent corrosion and freeze-up problems. The potassium cation form of a zeolite A molecular sieve--with at least 60 per cent of the sodium cations replaced with potassium ions, agglomerated with a clay binder and pore-reduced to essentially exclude the adsorption of R-32, and having essentially no reactivity with difluoromethane--has been found to be an effective desiccant for refrigerants comprising difluoromethane.

Process for drying CH.sub.2 F.sub.2 refrigerant utilizing zeolite

Novel, hollow, low-density agglomerates for use in sealed insulating glass windows to adsorb water vapor, and optionally organic materials, present in the cavity between the two glazings. These agglomerates provide sufficient but not excessive amounts of zeolitic and other adsorbents when used to fill all portions of the spacer tube located at the peripheral sides of the double glazed unit, thereby greatly facilitating the filling of such spacer tubes and the fabrication of the overall unit.

Adsorbent for use in double glazed windows

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.

Recovery and purification of refrigerants

Novel, hollow, low-density agglomerates for use in sealed insulating glass windows to adsorb water vapor, and optionally organic materials, present in the cavity between the two adsorbents when used to fill all portions of the spacer tube located at the peripheral sides of the double glazed unit, thereby greatly facilitating the filling of such spacer robes and the fabrication of the overall unit.

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.

Muffler device for internal combustion engines

Process for recovery and purification of refrigerants with solid sorbents

Difluoromethane (R32) is of current interest as a partial replacement for chlorodifluoromethane (R22) refrigerant heretofore widely used in vapor compression refrigeration systems. R32 has, however, proved to be more reactive than is desirable with the zeolite A adsorbent-desiccant compositions used in such systems to prevent corrosion and freeze-up problems. The sodium cation form of a zeolite having the crystal structure of zeolite B is found to be an effective adsorbent for that purpose and to be significantly less reactive with the R32.

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.

Method of coating aluminum substrates with solid adsorbent

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.

An exercise machine is particularly adapted for use by handicapped persons or other physically limited persons. The exercise machine includes a plurality of exercise mechanisms operable from a single station so that the handicapped person does not have to move between different stations. The plurality of exercise mechanisms are operatively connected to a single brake mechanism to that each exercise mechanism can be independently manipulated. One of the exercise mechanisms includes an overhead bar assembly which is operable as a bench press or as an overhead press.

Exercise machine for handicapped or disabled persons

Molecular sieve agglomerates that can have improved physical and chemical properties are prepared by methods which comprise contacting the agglomerates with an alkali metal silicate solution. Molecular sieve agglomerates which comprise binders such as kaolin can additionally be contacted with an alkali hydroxide solution to convert the kaolin to Zeolite A prior to contacting the agglomerates with the alkali metal silicate solution to further improve properties. The molecular sieve agglomerates prepared according to the present invention are suitable for use as refrigerant desiccants.

Growing community of inventors

New Fairfield, CT, United States of America

Alan P Cohen