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Michael B Hamoy

Chunqing Liu

Carl Liskey

Stephen R Caskey

Howie Q Tran

Nicole K Karns

David W Greer

Processes for removing arsenic compounds from a feed stream using an adsorbent in disclosed. The process includes contacting a feed stream comprising at least arsenic and sulfur compounds with an adsorbent comprising an low-crystallinity manganese oxide, at least one halide and a binder, to provide a treated effluent substantially free of the arsenic and sulfur compounds.

Enhancement of reduction resistance for manganese oxide adsorbents

The invention discloses dual layer-coated membranes and methods for making and using these membranes. The dual layer-coated membranes have a relatively porous and substantial void-containing selective asymmetric membrane support, a first coating layer comprising a hydrogel, and a second coating layer comprising a hydrophobic fluoropolymer. The membrane support has low selectivity and high permeance. The dual layer coating improves the selectivity of the membrane support and maintains the membrane performance with time. The dual layer-coated membranes are suitable for a variety of liquid, gas, and vapor separations such as water purification, non-aqueous liquid separation such as deep desulfurization of gasoline and diesel fuels, ethanol/water separations, pervaporation dehydration of aqueous/organic mixtures, fuel gas conditioning, CO/CH, He/CH, CO/N, H/CH, O/N, olefin/paraffin, iso/normal paraffins separations, and other light gas mixture separations. The dual layer-coated membranes are especially useful for natural gas liquid (NGL) recovery and COremoval from natural gas.

Dual layer-coated membranes for gas separations

Polyimide membranes are provided that provide extremely high permeability. The polyimides do not contain carbonyl or sulfonyl functional groups. These membranes are useful in separating gases including the separation of gas pairs including carbon dioxide/methane, hydrogen/methane and propylene/propane as well as other gas mixtures. The membrane selectivity can be adjusted by exposure to ultraviolet light.

High permeability polyimide membranes: gas selectivity enhancement through UV treatment

The invention is a process of making a chemically and UV treated polymer of intrinsic microporosity membrane comprising preparing a polymer of intrinsic microporosity, chemically cross-linking said polymer of intrinsic microporosity with a cross-linking compound to produce a chemically cross-linked polymer of intrinsic microporosity and then treating said chemically cross-linked polymer with UV radiation for a period of time sufficient to provide a product membrane. This product membrane is useful in the separation of C3 and higher hydrocarbons, as well as CO, from natural gas and other gas streams.

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Crystal Lake, IL, United States of America

Michael B Hamoy