Topic
Calcium oxide
About: Calcium oxide is a research topic. Over the lifetime, 7600 publications have been published within this topic receiving 66104 citations. The topic is also known as: caustic lime & quicklime.
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TL;DR: In this article, the physicochemical properties of CaO-derived sorbents were analyzed using X-ray diffraction, N2 adsorption and scanning electron microscopy.
38 citations
Patent•
21 Aug 1981TL;DR: Strontium and barium-based catalyzed alkoxylation of all classes is carried out more rapidly and produces a more peaked reaction product when carried out in the presence of co-catalysts such as calcium oxide, calcium carbide, calcium hydroxide, magnesium metal, magnesium hydroxides, zinc oxide, and aluminum metal.
Abstract: Strontium and barium-based catalyzed alkoxylation of alcohols of all classes is carried out more rapidly and produces a more peaked reaction product when carried out in the presence of co-catalysts such as calcium oxide, calcium carbide, calcium hydroxide, magnesium metal, magnesium hydroxides, zinc oxide, and aluminum metal.
38 citations
TL;DR: In this paper, it was shown that the calcium carbonate contained in limestone can be used as a sorbent for hydrogen sulfide in high-temperature gas cleaning applications if it is prevented from undergoing calcination since calcium oxide may sinter rapidly.
Abstract: The calcium carbonate contained in limestone becomes thermodynamically capable of sorbing hydrogen sulfide from high-pressure coal gas at temperatures above 600 C, typically well below the calcination temperature. Limestone can be used more effectively as a sorbent for hydrogen sulfide in high-temperature gas-cleaning applications if it is prevented from undergoing calcination since calcium oxide may sinter rapidly. For large (millimeter) sized particles typically used in gas cleaning, sintering of uncalcined limestone was found to be insignificant in the temperature range 750--900 C. Poor conversion of the solid upon reaction with H[sub 2]S is caused by sintering of the CaS product layer, which can be seen from scanning electron microscopy photographs. Sintering of CaS is rapid in an atmosphere that contains CO[sub 2], but is slow under N[sub 2] or H[sub 2]. The kinetics of CaS sintering under CO[sub 2] was determined for the temperature range 750--900 C.
38 citations
Patent•
24 Oct 1972
TL;DR: In this paper, an aqueous drilling fluid is provided containing dolomite, magnesium sulfate, calcium sulfate and starch or a similar polymeric fluid loss material and a small amount of calcium oxide or magnesium oxide in a brine solution.
Abstract: An aqueous drilling fluid is provided containing dolomite, magnesium sulfate, calcium sulfate, starch or a similar polymeric fluid loss material and a small amount of calcium oxide or magnesium oxide in a brine solution.
38 citations
Patent•
26 Sep 1980
TL;DR: In this article, a gypsum molded product having excellent waterproof properties without impaired strength was provided by adding alkaline metal alkylsiliconates or phenylsiliconates together with calcium hydroxide or calcium oxide to gypsUM; poly(α,β-unsaturated carboxylic acid) may be used in combination with the above, if desired.
Abstract: The present invention provides a gypsum molded product having excellent waterproof properties without impaired strength by adding alkaline metal alkylsiliconates or phenylsiliconates together with calcium hydroxide or calcium oxide to gypsum; poly(α,β-unsaturated carboxylic acid) may be used in combination with the above, if desired. According to the present invention, the preparation of a gypsum molded product, particularly a gypsum from desulfurization of exhaust gas, is contemplated.
38 citations