A process for removal of mercury in a gas dehydration system comprising (a) adding a complexing agent to a recirculated glycol solvent as part of the glycol solution feed prior to or at the dehydration liquid contactor and recirculating continuously with the glycol solvent, (b) selectively reacting the complexing agent with mercury in the wet natural gas to remove the mercury from the dry natural gas product, (c) and feeding the rich glycol with the complexing agent to a regenerator and continuously regenerating.

A composition for capturing, removing, and in some cases recovering a pollutant or raw material wherein the composition includes a polymeric material, one or more metal or nonmetal materials in granular form, and preferably a small amount of a salt material.

Methods of preparing organosilica materials, which are a polymer comprising of at least one independent cyclic polyurea monomer of Formula ##STR00001##
wherein each R.sup.1 is a Z.sup.1OZ.sup.2Z.sup.3SiZ.sup.4 group, wherein each Z.sup.1 represents a hydrogen atom, a C.sub.1-C.sub.4 alkyl group, or a bond to a silicon atom of another monomer unit; each Z.sup.2 and Z.sup.3 independently represent a hydroxyl group, a C.sub.1-C.sub.4 alkyl group, a C.sub.1-C.sub.4 alkoxy group or an oxygen atom bonded to a silicon atom of another monomer unit; and each Z.sup.4 represents a C.sub.1-C.sub.8 alkylene group bonded to a nitrogen atom of the cyclic polyurea are provided herein. Methods of preparing and processes of using the organosilica materials, e.g., for gas separation, color removal, etc., are also provided herein.

Methods for coating a substrate with a coating including an adsorbent material and a binder comprising an organosilica material which is a polymer comprising independent units of Formula [Z.sup.3Z.sup.4SiCH.sub.2].sub.3 (I), wherein each Z.sup.3 represents a hydroxyl group, a C.sub.1-C.sub.4 alkoxy group or an oxygen atom bonded to a silicon atom of another unit or an active site on the substrate and each Z.sup.4 represents a hydroxyl group, a C.sub.1-C.sub.4 alkoxy group, a C.sub.1-C.sub.4 alkyl group, an oxygen atom bonded to a silicon atom of another unit or an active site on the substrate are provided. Methods of gas separation are also provided.

The present invention generally relates to a process for making a metal oxide composition for use in removing contaminants from streams. A process of the present disclosure comprises contacting a metal salt with an aqueous solvent to form a metal salt mixture and reacting the metal salt mixture and a metal powder without the addition of heat. The present invention also relates to a process for making a coated metal oxide substrate.

The invention relates to a technique for handling liquid radioactive waste from a nuclear fuel-energy cycle, and may be used in a process for processing liquid radioactive waste for maximally reducing the volume thereof and removing radionuclides by concentrating same in a solid phase. The aim is achieved by means of a method for processing liquid radioactive waste and for the recovery thereof, including waste oxidation, separating sludge, colloids and suspended particles from a liquid phase, and removing, from the liquid phase, radionuclides to be subsequently recovered using selective sorbents and filters; the method is characterized in that, prior to the stage for separating sludge, colloids and suspended particles from the liquid phase of the radioactive waste, selective sorbents in the form of powders are added and mixed into the liquid waste.

A method is described for preparing a sorbent precursor comprising the steps of: (i) forming agglomerates comprising a particulate support material, (ii) coating the agglomerates with a coating mixture powder comprising a particulate sulphidable copper compound and a particulate calcined, rehydratable alumina to form a coated agglomerate, and (iii) drying the coated agglomerate to form a dried sorbent precursor. The sorbent precursor may be sulphided and used to remove heavy metals such as mercury from fluid streams.

A method is described for preparing a sorbent comprising the steps of: (i) mixing together a particulate copper sulphide material and a particulate calcined rehydratable alumina, (ii) shaping the mixture, and (iii) drying the shaped mixture to form a dried sorbent.

A method is described for preparing a sorbent comprising the steps of: (i) forming agglomerates comprising a particulate support material, (ii) coating the agglomerates with a coating mixture powder comprising a particulate copper sulphide and a particulate calcined, rehydratable alumina to form a coated agglomerate, and (iii) drying the coated agglomerate to form a dried sorbent.

The present disclosure is directed to a desulphurization agent for removing sulphurous species from a diluent or process stream, and a use of such agent. In some examples, the agent may include a compound of manganese, pore forming particles and a compound of copper. The agent may be introduced into or mixed with the diluent or process stream to effectuate removal of sulphurous species from the diluent or process stream.