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    • 9. 发明授权
    • Process for removing chlorine from gas stream
    • 从气流中除去氯的方法
    • US06409981B1
    • 2002-06-25
    • US09329412
    • 1999-06-10
    • Edmund Hugh StittFrederick Ernest Hancock
    • Edmund Hugh StittFrederick Ernest Hancock
    • B01D5368
    • B01D53/68B01D53/1425
    • A process for the scrubbing of chlorine is scrubbed from a chlorine-containing gas using an aqueous feed liquor containing an excess of alkali to give an effluent liquor containing chloride and hypochlorite ions is disclosed. The effluent liquor is recycled as part or all of the aqueous feed liquor. For at least part of the time, at least part of the effluent liquor is passed through a fixed bed of a catalyst for the decomposition of hypochlorite ions whereby hypochlorite ions are decomposed to oxygen gas and chloride ions. The resultant catalyst-treated liquor is mixed with the remainder, if any, of the effluent liquor and recycled, optionally together with added fresh alkali solution, as the aqueous feed liquor. Part of the effluent liquor is optionally discharged as a purge stream before or after passage through catalyst bed. The process may be operated in a continuous mode or in a semi-continuous mode wherein a reservoir holding the liquor to be recycled is periodically discharged, preferably through the catalyst bed, and then recharged with fresh alkali solution. Alternatively two reservoirs may be employed with one supplying the aqueous feed liquor while the other is being discharged and replenished. In the latter case, the reservoir being discharged may have its liquor discharged through the catalyst bed.
    • 使用含有过量碱的含水原料液从含氯气体中洗涤氯的洗涤方法,得到含有氯化物和次氯酸根离子的流出液。 流出液被回收作为部分或全部含水进料液。 在至少部分时间内,至少部分废液通过催化剂的固定床,以分解次氯酸根离子,从而将次氯酸根离子分解成氧气和氯离子。 将得到的催化剂处理的液体与其余的(如果有的话)的流出液混合,并且任选地与添加的新鲜碱溶液一起再循环,作为含水进料液。 在通过催化剂床之前或之后,部分流出液可任选地作为吹扫流排出。 该方法可以以连续模式或半连续模式操作,其中储存待循环液体的储存器周期性地排出,优选通过催化剂床,然后用新鲜碱溶液再充电。 或者,可以使用两个储存器,一个供应水性进料液,另一个储存器被排出并补充。 在后一种情况下,被排出的储存器可以使其液体通过催化剂床排出。
    • 10. 发明授权
    • Calcium aluminate based catalyst and use of the catalyst
    • 铝酸钙基催化剂和催化剂的使用
    • US06261465B1
    • 2001-07-17
    • US09271647
    • 1999-03-18
    • Frederick Ernest Hancock
    • Frederick Ernest Hancock
    • C02F100
    • C02F1/725B01J23/78B01J37/0009C02F2303/185
    • Shaped units suitable for use as a catalyst, e.g. for the decomposition of hypochlorite, comprise a compacted particulate mixture of at least one oxide of a Group VIII metal M selected from nickel and cobalt, a calcium aluminate cement, and alumina and/or magnesia, the shaped units having (after ignition in air at 900° C.) a content of a Group VIII metal oxide of 10 to 50% by weight (expressed as the divalent oxide, MO), a calcium oxide content of 1 to 10% by weight, an alumina content by weight that is at least four times the weight of calcium oxide, a total content of alumina plus magnesia of at least 40% by weight, a silica content of less than 1% by weight, and the shaped units having a pore volume in the range 0.2 to 0.5 ml/g and having a pore size distribution such that from 5 to 25% of the total pore volume is in the form of pores of diameter in the range 15 to 35 nm, at least 30% of the total pore volume is in the form of pores of diameter greater than 35 nm, and 10 to 20% of the total pore volume is in the form of pores of diameter greater than 1500 nm.
    • 适合用作催化剂的成形单元,例如 为了分解次氯酸盐,包含至少一种选自镍和钴的第Ⅷ族金属M的氧化物,铝酸钙水泥和氧化铝和/或氧化镁的至少一种氧化物的压实颗粒混合物,所述成形单元具有(在空气中点燃 900℃),第Ⅷ族金属氧化物的含量为10〜50重量%(二价氧化物表示为MO),氧化钙含量为1〜10重量%,氧化铝含量为 至少四倍于氧化钙的重量,氧化铝和氧化镁的总含量至少为40重量%,二氧化硅含量小于1重量%,成孔单元的孔体积为0.2-0.5毫升 / g,并且具有孔尺寸分布,使得总孔体积的5至25%是直径为15至35nm的孔的形式,总孔体积的至少30%为 直径大于35nm的孔和总孔体积的10〜20%为d孔的形式 直径大于1500nm。