摘要:
A process for producing hydrogen gas is disclosed. In one embodiment, the process for produces hydrogen gas from biofuel reformation. The process includes the step of reacting a biofuel with a naturally occuring base.
摘要:
A calcium product contains, in dry state, at least 97% by weight of a calcium compound chosen from calcium oxide, calcium hydroxide, calcium sulphate (up to 3% by weight, preferably less) and calcium carbonate, and less than or equal to 4.2 ppm by weight of phosphorus with respect to calcium content and less than or equal to 1.4 ppm by weight of boron with respect to calcium content.
摘要:
Des glucides sont utilisés comme additif pour stabiliser la viscosité des suspensions de lait de chaux calcique, de chaux magnésienne ou leurs mélanges. Ces glucides sont choisis parmi les monosaccharides, disaccharides, oligosaccharides ou leurs dérivés.
摘要:
The present invention is related to a method of controlling particle sizes of aragonite-type precipitated calcium carbonate comprising the steps of manufacturing various-sized calcium hydroxide through the hydration reaction of CaO, which is caustic lime, while changing the solid-liquid ratio of caustic lime and the initial reaction temperature to 10 ~ 80 °G stabilizing calcium hydroxide by adding the aqueous solution of sodium hydroxide to the suspension of calcium hydroxide; supplying the aqueous solution of sodium carbonate while stirring the suspension in the above stabilizing step; and washing, filtering, and drying the above suspension of calcium carbonate.
摘要:
Disclosed is an ionic conductor comprising a metal composite oxide characterized by comprising oxygen defects and metal defects in a cryolite lattice. An electrochemical device comprising the ionic conductor is also disclosed. The metal composite oxide has an improved ion conductivity, because formation of an open space within a lattice is ensured by the defects of metal ion sites in the lattice. Therefore, the metal composite oxide is useful for an ionic conductor or an electrochemical device requiring ionic conductivity.
摘要:
A calco-magnesian suspension comprising solid matter particles having, prior to suspension, a specific surface calculated according to the BET method, which is less than or equal to 10 m /g. The invention also relates to a method for the production thereof.
摘要:
The present invention provides an electrochemical process for reducing metal contaminants in calcium carbonate by solubilizing the metal contaminate in an aqueous solution of calcium carbonate and then removing the solubilized metal contaminant by passing an electrical current through the aqueous calcium carbonate containing the solubilized metal contaminant. Calcium carbonate produced according to the process of this invention is particularly suitable for use as food or pharmaceutical additives. The calcium carbonate is also suitable for use in papermaking process as fillers, or coatings, or as additives in the production of plastics, paints and adhesive products. Other uses of high purity calcium carbonate include catalysts and catalyst supports, electrical/semiconductor applications, fluorescent lighting, and optical/laser applications.
摘要:
Dried calcium hydroxide particles having a moisture content of less than 2 wt %, a specific surface area greater than 30 m /g, a total nitrogen-desorption pore volume of at least 0.1 cm /g, a CO2 content of less than 2 %, and a nitrogen-desorption pore volume consisting of pores with a diameter of 100-400 ANGSTROM greater than 0.06 cm /g.
摘要:
Finely divided composite materials are provided comprising a first metal oxide (e.g., MgO) at least partially coated with an extremely thin layer of a second metal oxide such as Fe2O3. The composites have a high surface area and are very effective for the destructive adsorption of undesirable fluids in gaseous or liquid form, such as chlorocarbons and clorofluorocarbons. In use, a fluid stream including undesirable fluids are contacted with the composites of the invention, such as through the use of a filter containing the composite as a part of the filter media thereof.
摘要翻译:提供细分复合材料,其包括至少部分涂覆有第二金属氧化物如Fe 2 O 3的极薄层的第一金属氧化物(例如MgO)。 复合材料具有高的表面积,对于气态或液态形式的不需要的流体如氯代烃和氯氟烃的破坏性吸附是非常有效的。 在使用中,包括不期望的流体的流体流与本发明的复合材料接触,例如通过使用包含复合材料的过滤器作为其过滤介质的一部分。
摘要:
An improved lime slaker in which the lime is combined with the slaking liquor in a vertical conduit (18) which extends below the level of the liquor in the slaker vessel (10). The slaking liquor is introduced into the conduit at a high velocity tangential (26) to the interior surface of the conduit to flush the lime into the vessel. The slaker includes a vertical vent pipe (28) that extends through the bottom (14) of the vessel. In a preferred embodiment, the inlet of the vent pipe is surrounded by an entrainment separator (32). Removable covers (24, 36) permit convenient access for inspection and cleaning of the conduit and the vent pipe.