摘要:
Porous substrates containing seeds of hydrous crystalline alumina are contacted with an aqueous solution of alkaline aluminate, thereby causing additional crystalline hydrous alumina to grow on the seeds within the pores of the substrate.
摘要:
Macroporous ion exchange resins having increased apparent density are provided by incorporating into said resins a weighting agent which is of greater apparent density than the resin itself. Such weighted resins exhibit reduced bed expansion when used with upflow streams, with relatively dense liquids, and with relatively viscous liquids.
摘要:
The present invention is a composition comprising pellets, each of said pellets consisting essentially of an integral mass of polycrystalline material of randomly disposed crystals of hydrated alumina infused with an amount of LiX to produce LiX/Al(OH)3 having up to a mol fraction of 0.33 of LiX in the so-produced LiX/Al(OH)3, wherein LiX is at least one compound selected from the group consisting of Li hydroxide, Li halide, Li nitrate, Li sulfate, and Li bicarbonate. The present invention further includes methods of preparing the composition and methods of recovery lithium values from brine using the composition.
摘要:
Useful compositions are prepared by incorporating into organic materials, crystalline lithium aluminates which conform substantially to the empirical formula(LiA.sub.x).sub.y.2Al(OH).sub.3.nH.sub.2 Owhere A represents one or more anions and/or negative-valence radicals,where x represents a quantity of A ions and/or radicals sufficient to substantially satisfy the valence requirements of the Li,where y is a numerical value sufficient to maintain the crystalline structure,and where n represents the number of waters of hydration, if any.
摘要:
Useful compositions are prepared by incorporating into organic materials, crystalline lithium aluminates which conform substantially to the empirical formula(LiA.sub.x).sub.y.2Al(OH).sub.3.nH.sub.2 Owhere A represents one or more anions and/or negative-valence radicals,where x represents a quantity of A ions and/or radicals sufficient to substantially satisfy the valence requirements of the Li,where y is a numerical value sufficient to maintain the crystalline structure,and where n represents the number of waters of hydration, if any.
摘要:
Useful compositions are prepared by incorporating into organic materials, crystalline lithium aluminates which conform substantially to the empirical formula(LiA.sub.x).sub.y.2Al(OH).sub.3.nH.sub.2 Owhere A represents one or more anions and/or negative-valence radicals,where x represents a quantity of A ions and/or radicals sufficient to substantially satisfy the valence requirements of the Li,where y is a numerical value sufficient to maintain the crystalline structure,and where n represents the number of waters of hydration, if any.
摘要:
Pellets of a polycrystalline hydrated alumina, especially Gibbsite, are infused with LiOH to obtain loadings up to 0.33 mol fraction of LiOH in the LiOH/Al(OH).sub.3. The so-prepared material is useful for mixing with a LiX-containing brine solution, producing an interaction of the LiOH infused in the alumina pellets with the X ion (where X represents an acid salt moiety, especially halide) of the LiX-containing brine. The LiX interaction product is efficiently removed from the alumina pellets by water washing, leaving rejuvenated LiOH which can be used in yet another cycling of LiX formation/water removal. A plurality of loading and unloading cycles are achieved, yielding an appreciable amount of the lithium values derived from the brine.
摘要:
Morphologically altered pellets of a polycrystalline hydrated alumina, intercalated with LiX (where LiX is a lithium salt, preferably LiCl), is prepared by contacting the polycrystalline structure with LiX solution carried in NaCl brine, the LiX creating lithium-specific sites of intercalation in the crystalline structure, and the material is used in a LiX absorption process involving unloading LiX from the pellets, and then passing a LiX-containing brine through the pellets to capture more LiX in the Li-depleted active sites, and repeating the unloading and loading of the LiX a plurality of cycles. The unloaded LiX is collected as crude product which can be concentrated by evaporation and removing precipitated NaCl.
摘要:
Apparatus, process and article for treating an aqueous solution containing a chemical contaminant. The process includes contacting an aqueous solution containing a chemical contaminant with an aggregate composition comprising an insoluble rare earth-containing compound to form a solution depleted of chemical contaminants. The insoluble rare earth-containing compound can include one or more of cerium, lanthanum, or praseodymium. A suitable insoluble cerium-containing compound can be derived from a cerium carbonate, cerium oxalate and/or a cerium salt. The aggregate composition can include more than 10.01% by weight of the insoluble rare earth-containing compound, and in a particular embodiment consists essentially of one or more cerium oxides, and optionally a binder and/or flow aid. Although intended for a variety of fluid treatment applications, such applications specifically include removing or detoxifying chemical contaminants in water.
摘要:
A non-linear shaped charge perforator for use in perforating an oil and gas formation into which a wellbore has been drilled comprises a monolithic, axisymmetric metal case in which is disposed a main explosive charge between the front of the case, which is closed with a concave metal liner, and the closed back end of the case. The main explosive charge contains multiple initiation points, preferably two initiation points located about 180° apart on the outside surface of the charge, so that when the perforator is detonated the main charge is initiated such that the metal liner is collapsed into a non-circular jet, preferably a fan-shaped jet, that pierces the casing of the wellbore and forms non-circular perforations, preferably slot-shaped perforations, in the surrounding formation.