Bright annealing of stainless steels
    3.
    发明授权
    Bright annealing of stainless steels 失效
    明亮退火不锈钢

    公开(公告)号:US4744837A

    公开(公告)日:1988-05-17

    申请号:US002841

    申请日:1987-01-13

    IPC分类号: C21D1/76 C21D6/00 C21D1/74

    CPC分类号: C21D6/002 C21D1/76

    摘要: A process for bright annealing of chromium containing alloys such as stainless steels in an atmosphere of nitrogen and hydrogen containing controlled additions of an inhibitor as described in U.S. Pat. No. 4,334,938 wherein at least one element provided at the surface of the article being annealed in an amount such that it is oxidized in preference to the chromium in said article, whereby nitrogen uptake is inhibited and dulling of the metal surface by formation of a film containing chromium oxide is avoided.

    摘要翻译: 在氮气和氢气气氛中对含铬合金如不锈钢进行光亮退火的方法,其含有受控添加的抑制剂,如美国专利No. 其中提供在制品表面处的至少一种元素被退火,其量使其优先于所述制品中的铬被氧化,由此通过形成膜来抑制氮吸收并使金属表面变钝 避免了含铬氧化铬。

    Selective chromatographic process using an ion-exchanged, dehydrated
chabazite adsorbent
    7.
    发明授权
    Selective chromatographic process using an ion-exchanged, dehydrated chabazite adsorbent 失效
    使用离子交换的脱水菱沸石吸附剂进行选择性色谱法

    公开(公告)号:US4747854A

    公开(公告)日:1988-05-31

    申请号:US66789

    申请日:1987-06-25

    IPC分类号: B01J20/18 B01D53/04

    CPC分类号: B01J20/186 Y10S95/902

    摘要: The present invention relates to a process for the selective adsorption and separation of one or more constituents from a gas stream in a gas chromatograph, wherein the gas stream is contacted with a dehydrated chabazite adsorbent having a residual water content of less than 1.5 wt % and having at least 50% of any exchangeable ion capacity exchanged with a polyvalent metal cation. The process of the present invention both anticipates separation of the constituents due to either a difference in the heats of adsorption of the constituents or a size exclusion effect.

    摘要翻译: 本发明涉及在气相色谱仪中从气流中选择性吸附和分离一种或多种成分的方法,其中气流与残留含水量小于1.5重量%的脱水菱沸石吸附剂接触, 具有与多价金属阳离子交换的任何可交换离子容量的至少50%。 本发明的方法既预期由于组分的吸附热差异或尺寸排阻效应导致组分的分离。

    Process for the purification of permanent gases using chabazite
adsorbents
    8.
    发明授权
    Process for the purification of permanent gases using chabazite adsorbents 失效
    使用菱沸石吸附剂净化永久性气体的方法

    公开(公告)号:US4732584A

    公开(公告)日:1988-03-22

    申请号:US53283

    申请日:1987-05-22

    IPC分类号: B01J20/18 B01D53/04

    CPC分类号: B01J20/186

    摘要: Thoroughly dehydrated, certain forms of chabazite have improved utility for purifying bulk gases. Compared to conventional molecular sieves, these chabazites have improved properties for removing low levels of gas contaminants having larger heats of adsorption than the bulk component. Also, the small pore chabazite can remove weakly interacting adsorbates from bulk gases having kinetic diameters which exceed that of the pore opening. This discovery of the intrinsic properties of polyvalent chabazites expands the range of contaminant gases which can be removed from bulk gases economically using standard adsorption processes, e.g. using these adsorbents it is possible to remove trace nitrogen from argon.

    摘要翻译: 彻底脱水,某些形式的菱沸石已经提高了净化散装气体的效用。 与常规分子筛相比,这些菱沸石具有改进的性能,用于除去具有比主体组分更大的吸附热的低含量气体污染物。 此外,小孔菱沸石可以从具有超过孔开口的动力学直径的体积气体中除去弱相互作用的吸附物质。 这种多价菱沸石的固有性质的发现扩大了可以使用标准吸附方法,例如经济地从散装气体中去除的污染气体的范围。 使用这些吸附剂可以从氩气中除去痕量的氮。

    Polyvalent ion exchanged adsorbent for air separation
    9.
    发明授权
    Polyvalent ion exchanged adsorbent for air separation 失效
    用于空气分离的多价离子交换吸附剂

    公开(公告)号:US4481018A

    公开(公告)日:1984-11-06

    申请号:US441822

    申请日:1982-11-15

    摘要: The invention relates to faujasite-containing compositions in which the original hydrogen or monovalent forms are ion exchanged to their polyvalent form and then thermally activated to promote dehydration and dehydroxylation of the faujasite while maintaining substantially the same zeolite content. The resulting compositions containing faujasites substantially in their dehydrated/dehydroxylated state have been found to have surprisingly high selectivities and capacities for the separation of air into nitrogen and oxygen.

    摘要翻译: 本发明涉及含有八面沸石的组合物,其中原始氢或一价形式被离子交换为其多价形式,然后热活化以促进八面沸石的脱水和脱羟基化,同时保持基本相同的沸石含量。 已经发现得到的含有基本上脱水/脱羟基化状态的八面沸石的组合物具有惊人的高选择性和将空气分离成氮和氧的能力。

    Process for preparing halogenated metal chelates
    10.
    发明授权
    Process for preparing halogenated metal chelates 失效
    制备卤化金属螯合物的方法

    公开(公告)号:US4150047A

    公开(公告)日:1979-04-17

    申请号:US883885

    申请日:1978-03-06

    CPC分类号: C07C49/92 C07C45/77

    摘要: This invention relates to an improved process for preparing halogenated metal chelates of beta-dicarbonyl compounds, particularly the tris-brominated acetylacetonates. The process comprises passing elemental halogen through a solution comprising the metal chelate, an inert solvent in which the metal chelate has a solubility of at least 0.5 grams per 100 grams solvent and the halogenated product has a solubility of less than 1 gram per 100 grams solvent and a halogenated Lewis acid at a temperature from about 0.degree.-60.degree. C. thereby forming a halogenated metal chelate precipitate and then recovering the precipitate.

    摘要翻译: 本发明涉及一种制备β-二羰基化合物,特别是三溴化乙酰丙酮化物的卤化金属螯合物的改进方法。 该方法包括使元素卤素通过包含金属螯合物的溶液,惰性溶剂,其中金属螯合物的溶解度至少为0.5克/ 100克溶剂,卤化产物的溶解度小于1克/ 100克溶剂 和卤代路易斯酸,在约0°-60℃的温度下,由此形成卤化金属螯合物沉淀,然后回收沉淀物。