A method of making a synthetic hectorite-type mineral is described, along with its resulting physical and rheological properties. The synthetic hectorite-type mineral is a 2:1 phyllosilicate essentially free of aluminum, and having a trioctahedral structure with Mg2+ and Li+ occupying octahedral sites. As a hydrogel, the synthetic hectorite-type mineral has a swell index of greater than 55 mL, and a yield point of greater than 290 Pa. The method of making uses a MgO/MgCO3 buffer system, with heating for about 2 hours at temperatures of no higher than 300 C. and pressures of no higher than 600 psi.

A process for the production of a mixed metal hydroxide material for use as a cathode active material precursor is described, wherein the process utilizes cavitation to produce high quality materials through elimination of some processing steps and ingredients. In particular, a method of producing a mixed metal hydroxide material combining a first metal, a second metal, an oxidant and a liquid to form a reaction slurry is disclosed. The method may include applying cavitation to the liquid prior to the formation of the reaction slurry and/or applying cavitation to the liquid when the liquid is part of the reaction slurry. A method of forming an active material and a mixed metal hydroxide material for use as an active material precursor is also disclosed.

A method for extracting and separating salt alkali from saline alkali soil and soil improvement is disclosed. A foundation pit, square convex edge and cylindrical partition are arranged on a saline alkali land. Nitric or phosphoric acid solution is added to obtain a saline alkali pool. A trench is set around, and/or, a cylinder is set in the center of saline alkali pool. The evaporating material is prepared from vermiculite, laid on plastic wrapping material, and/or added into the cylinder. The salt alkali is precipitated and enriched through natural evaporation. The evaporating material enriched with salt alkali is taken out to be dissolved, separated and washed to obtain saline alkali solution and vermiculite or evaporating material. The vermiculite material is returned for reuse, and the above process is repeated. Alkali solution and intercalation agent are added into saline alkali solution to react and crystallize to obtain functional materials.

A method of removing hydrogen sulfide from a subterranean geological formation includes injecting a drilling fluid suspension in the subterranean geological formation. The drilling fluid suspension has a pH of 10 or more and includes a layered triple hydroxide material, including manganese, copper, and aluminum, in an amount of 0.01 to 1.5 percent by weight of the drilling fluid suspension. The method further includes circulating the drilling fluid suspension in the subterranean geological formation and forming a water-based mud and scavenging the hydrogen sulfide from the subterranean geological formation by reacting the hydrogen sulfide with the layered triple hydroxide material in the water-based mud.

The present disclosure relates to double layered hydroxide-type compounds comprising both di- and tri-valent nickel ions, and the use of such compounds in electrodes for energy storage device in addition to a previously developed electrode using Fe.sup.2+ and Fe.sup.3+ green rusts related compounds.

Simple, material-efficient microgranulation methods are disclosed for aggregating precursor particles into larger product particles with improved properties and, in some instances, novel structures. The product particles are useful in applications requiring uniform, smooth, spherical, or rounded particles such as for electrode materials in lithium batteries and other applications.

A method of removing hydrogen sulfide from a subterranean geological formation includes injecting a drilling fluid suspension in the subterranean geological formation. The drilling fluid suspension has a pH of 10 or more and includes a layered triple hydroxide material, including manganese, cobalt, and iron, in an amount of 0.01 to 0.5 precent by weight of the drilling fluid suspension. The method further includes circulating the drilling fluid suspension in the subterranean geological formation and forming a water-based mud and scavenging the hydrogen sulfide from the subterranean geological formation by reacting the hydrogen sulfide with the layered triple hydroxide material in the water-based mud.

A hybrid functionalized lamellar comprises a layered double hydroxide and [Sn.sub.2S.sub.6].sup.4 anions intercalated with the gallery of the layered double hydroxide to form a [Sn.sub.2S.sub.6].sup.4 intercalated layered double hydroxide.

A bitransition mixed chalcogenide, nickel cobalt sulfoselenide/nickel sulfoselenide mixed chalcogenide for use as supercapacitor and method of fabrication of nickel cobalt sulfoselenide/nickel sulfoselenide material is disclosed. The nickel cobalt sulfoselenide mixed chalcogenide comprises Ni.sub.1Co.sub.1-xSSe, where nickel and cobalt are in ratios of 6:4, 4:6, 5:5, 0:10, or 10:0 forming Ni.sub.0.6Co.sub.0.4SSe, Ni.sub.0.4Co.sub.0.6SSe, Ni.sub.0.5Co.sub.0.5SSe CoSSe or NiSSe. The supercapacitor electrode formed from Ni.sub.0.6Co.sub.0.4SSe gives a specific capacitance of 464 Fg.sup.1 with a current density of 1 Ag.sup.1 and NiSSe electrode gives a specific capacitance of 1908 Fg.sup.1 with a current density of 1 Ag.sup.1. The method (100) includes providing Ni(NO.sub.3).sub.2.Math.6H.sub.2O and Co(NO.sub.3).sub.2.Math.6H.sub.2O in different ratios, adding (104) NaOH and Na.sub.2S flakes and grinding to form a mixture, adding (106) ethylene glycol and selenium powder and homogenizing the mixture, heating (108) at 180 C. and washing with ethanol and drying at about 60 C. for 36 hrs to obtain a fine powder.

The present invention relates to a method of preparing a buffer material composed of bentonite modified with a layered double hydroxide (LDH) as a buffer material used for deep geological disposal of radioactive waste, the method including a step (a) of producing a first mixture by adding a compound containing a divalent cationic material, aluminum nitrate (Al(NO.sub.3).sub.3), and bismuth nitrate (Bi(NO.sub.3).sub.3) to a reactor.