摘要:
The present invention relates generally to a method for processing carbon dioxide gas (“CO2”). The method includes introducing a solution which includes a cation and a hydroxide and/or oxide to the CO2 to form a cation-containing carbonate salt; reacting the cation-containing carbonate salt with an acidic solution including a rare earth element to form a substantially solid, ionic rare earth element-containing carbonate salt material, the rare earth, cation-containing carbonate being substantially stable in the acidic solution such as to resist substantial formation of compounds selected from the group consisting of oxide, hydroxide and mixtures thereof; separating the rare earth element-containing carbonate salt material from the acidic solution; and reducing the rare earth element-containing carbonate salt material to a carbon-containing compound selected from the group consisting of carbon monoxide gas, elemental carbon and mixtures thereof.
摘要:
A biocompatible coating is formed on an aluminum sheet surface by reacting a surface portion with an aqueous solution containing calcium hydroxide and a more soluble calcium salt to form a hydrocalumite first coating. The first coating is then reacted with a water-soluble phosphate to form a biocompatible coating comprising hydroxyapatite. The hydroxyapatite coating may be reacted with a water-soluble fluoride or fluorophosphate to form a fluorapatite coating.
摘要:
A composite and a process for forming it are provided, said process comprising providing a substrate bearing crystalline and preferably single crystal filaments as growths on the substrate and forming a solid matrix encompassing the filaments. The composites are useful for aircraft, boat and auto skins and structural members.
摘要:
A process for preparing a stabilized high cristobalite from a gel comprising ultramicroscopic particles of SiO.sub.2, Na.sub.2 O, and Al.sub.2 O.sub.3 where the ratio of moles of Na.sub.2 O to Al.sub.2 O.sub.3 is from about 0.95 to about 1.1, and the molar ratio of SiO.sub.2 to Al.sub.2 O.sub.3 is between about 10 and about 40. After the gel is formed, it is heated at 800-1400.degree. C. for a time sufficient to form stabilized high cristobalite.
摘要翻译:一种从包含SiO 2,Na 2 O和Al 2 O 3的超微粒子的凝胶制备稳定的高方英石的方法,其中Na 2 O与Al 2 O 3的摩尔比为约0.95至约1.1,并且SiO 2与Al 2 O 3的摩尔比为约10 约40℃。凝胶形成后,将其在800-1400℃下加热足以形成稳定的高方英石的时间。
摘要:
Maleic anhydride is produced by passing a C.sub.4 to C.sub.12 hydrocarbon stream together with molecular oxygen over a fixed bed containing a vanadium molybdate catalyst promoted with a novel cobalt tantalate having the formulaCoTa.sub.b O.sub.xwherein b is a number from about 1.0 to about 4.0 and x is a number from about 3.5 to about 11.0. The catalyst is prepared by calcining a slurry containing cobalt oxide and tantalum oxide, or their precursors, in at a temperature range from about 525.degree. to about 1200.degree. C. for about 1 to about 40 hours to obtain a cobalt tantalate, which is then slurried with a mixture of oxides of vanadium and molybdenum, or their precursors, dried, and then calcined at a temperature from about 300.degree. to about 650.degree. C. for about 0.5 to about 24 hours. A support can be used for the catalyst.
摘要:
The application generally relates to a process for generating hydrogen, oxygen or both from water. More particularly, the application generally relates to a lanthanide-mediated electrochemical and/or photoelectrochemical process for generating hydrogen, oxygen or both from water.
摘要:
A method of making a pillared hydrotalcite and an associated products. The pillared hydrotalcite is made by calcining a hydrotalcite having the formula A.sub.w B.sub.x (OH).sub.y [C].sub.z .multidot.nH.sub.2 O, wherein A represents a divalent metal cation, B represents a trivalent metal cation, C represents a mono- to tetravalent anion and w, x, y, z and n satisfy the following:0
摘要:
Disclosed is a crystalline compound and a method of making the compound. The composition is expressed in terms of molar ratios by the formula [Al.sub.2 (OH).sub.6 ].multidot.X[Li.sub.2 C.sub.2 O.sub.4 ] where X is in the range of 0.1 to 1. The method comprises the steps of adding Al(OH).sub.3 to an aqueous solution containing lithium oxalate to provide a mixture; and reacting said mixture to form said new compositions.
摘要翻译:公开了一种结晶化合物及其制备方法。 该组合物以摩尔比表示,通过式[Al 2(OH)6] x X [Li 2 C 2 O 4],其中X在0.1至1的范围内。该方法包括以下步骤:向水溶液中加入Al(OH)3 含有草酸锂以提供混合物; 并使所述混合物反应以形成所述新组合物。
摘要:
Maleic anhydride is produced by passing a C.sub.4 to C.sub.12 hydrocarbon stream together with molecular oxygen over a fixed bed containing a vanadium molybdate catalyst promoted with a novel cobalt niobate having the formulaCoNb.sub.a O.sub.xwherein a is a number from about 1.0 to about 4.0 and x is a number from about 3.5 to about 11.0. The catalyst is prepared by calcining a slurry containing cobalt oxide and niobium oxide, or their precursors, in at a temperature range from about 400.degree. to about 1200.degree. C. for about 1 to about 40 hours to obtain a cobalt niobate, which is then slurried with a mixture of oxides of vanadium and molybdenum, or their precursors, dried, and then calcined at a temperature from about 300.degree. to about 650.degree. C. for about 0.5 to about 24 hours. A support cam can be used for the catalyst.