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Catalyst based on transient metal oxides for total oxidation of volatile organic substances and process for producing thereof
Catalyst based on transient metal oxides for total oxidation of volatile organic substances and process for producing thereof
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机译：基于瞬态金属氧化物的用于挥发性有机物质完全氧化的催化剂及其生产方法
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摘要
In the present invention, there is disclosed a catalyst intended for total oxidation of volatile organic substances being present in concentrations of 100 to 10 000 mg/me3 of air wherein the oxidation is carried out at a temperature ranging from 60 to 500 degC and wherein the catalyst contains active components and a component modifying surface properties thereof. The catalyst active components are represented by oxides of transient metals being selected from the group consisting of cobalt, copper, nickel, chromium, manganese or iron or mixtures thereof and the catalyst surface property modifying component is represented by magnesium dioxide or a mixture of magnesium dioxide and aluminium oxide. Amount of the transient metal oxides as such or in a mixture ranges within 10 to 90 percent by weight and amount of the catalyst surface property modifying component ranges within 10 to 90 percent by weight. The invented catalyst is prepared so that aqueous solution of a transient metal salt or a mixture of water solutions of transient metal salts, aqueous solution of a magnesium dioxide salt and optionally aqueous solution of aluminium oxide salt are subjected to precipitation in a basic aqueous solution of an alkali metal carbonate and/or hydrogen carbonate and/or an alkali metal hydroxide at a temperature ranging from 5 to 100 degC and pH of the reacting mixture within 8 to 13. The obtained suspension is then let to ripen for a period of up to 48 hours at a temperature ranging from 5 to 180 degC, the obtained solid product is then filtered off from the suspension, washed, dried, molded and subjected to calcination at a temperature ranging from 200 to 800 degC.
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机译：在本发明中，公开了一种用于完全氧化以100至10000mg / me 3空气浓度存在的挥发性有机物质的催化剂，其中该氧化在60至500℃的温度下进行，并且其中催化剂包含活性组分及其改变其表面性质的组分。催化剂活性组分由选自钴，铜，镍，铬，锰或铁或它们的混合物的过渡金属的氧化物代表，催化剂表面改性组分由二氧化镁或二氧化镁的混合物代表和氧化铝。如此或以混合物形式的过渡金属氧化物的量在10至90重量％的范围内，并且催化剂表面改性组分的量在10至90重量％的范围内。制备本发明的催化剂，以使过渡金属盐的水溶液或过渡金属盐的水溶液，二氧化镁盐的水溶液和任选的氧化铝盐的水溶液的混合物在NaCl的碱性水溶液中沉淀。碱金属碳酸盐和/或碳酸氢盐和/或碱金属氢氧化物在5至100℃的温度范围内，反应混合物的pH在8至13范围内。然后在5-180℃的温度下搅拌48小时，然后将所得的固体产物从悬浮液中滤出，洗涤，干燥，模制并在200-800℃的温度下进行煅烧。
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