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    Carbon monoxide hydrogenation process
    2.
    发明授权
    Carbon monoxide hydrogenation process 有权
    一氧化碳氢化工艺

    公开(公告)号：US06624204B1

    公开(公告)日：2003-09-23

    申请号：US09653914

    申请日：2000-09-01

    申请人： Michel A. Daage ,  Russell John Koveal ,  David Chester Long ,  Leroy Russell Clavenna ,  Trikur Anantharaman Ramanarayaman ,  James Dirickson Mumford ,  Claude Clarence Culross

    发明人： Michel A. Daage ,  Russell John Koveal ,  David Chester Long ,  Leroy Russell Clavenna ,  Trikur Anantharaman Ramanarayaman ,  James Dirickson Mumford ,  Claude Clarence Culross

    IPC分类号： C07C2700

    CPC分类号： C10G2/33 ,  B01J25/04 ,  C07C1/045 ,  C07C1/049 ,  C07C2525/00 ,  C10G2/342 ,  Y02P20/584

    摘要： A method is disclosed for renewing the activity of a Dispersed Active Metal (DAM) catalyst during operation of a reactor wherein the hydrogenation of carbon monoxide to produce a mixture of hydrocarbons is being carried out comprising withdrawing a mixture of hydrocarbons and a portion of the DAM catalyst, reducing the hydrocarbon content thereof, heating the mixture above the melting temperature of at least one of the metals of the DAM to form a melt, removing any slag that forms on the melt, cooling the melt to form a solid, reducing the particle size thereof to form a renewed particulate DAM catalyst, which is then returned to the reactor. Wherein the DAM catalyst is a Raney catalyst, a leachable metal is added to the reduced hydrocarbon mixture or the melt under non-oxidizing conditions and, after the solid is reduced to a fine particle size, extracting the leachable metal with caustic. The activity of the DAM may be modified or enhanced during the process by the addition of promoter metals, or prior to being returned to the reactor, by slurry low temperature oxidation followed by reduction at elevated temperature, and may further be enhanced by being passivated prior to being returned to the reactor. The catalyst may be withdrawn and replaced periodically or continuously during the operation of the reactor.

    摘要翻译： 公开了一种用于在反应器操作期间更新分散活性金属（DAM）催化剂的活性的方法，其中一氧化碳的氢化以产生烃的混合物，其中包括抽出烃和一部分DAM的混合物 催化剂，降低其烃含量，将混合物加热至DAM金属中的至少一种的熔融温度以形成熔体，除去在熔体上形成的任何熔渣，冷却熔体以形成固体，还原颗粒 以形成更新的颗粒状DAM催化剂，然后将其返回反应器。 其中DAM催化剂是阮内催化剂，在非氧化条件下将还原的烃混合物或熔体中可浸出的金属加入，在将固体还原成细粒度后，用苛性碱萃取可浸出的金属。 在该过程中，DAM的活性可以通过加入助催化剂金属或在通过浆料低温氧化然后在升高的温度下还原而返回到反应器之前被修饰或增强，并且可以通过先前被钝化而进一步增强 返回反应堆。 催化剂可以在反应器的操作期间被定期或连续地取出和更换。

    Reactive heat treatment to form pearlite from an iron containing article
    3.
    发明授权
    Reactive heat treatment to form pearlite from an iron containing article 失效
    反应热处理从含铁制品形成珠光体

    公开(公告)号：US06942739B2

    公开(公告)日：2005-09-13

    申请号：US10002576

    申请日：2001-10-26

    申请人： Changmin Chun ,  Trikur Anantharaman Ramanarayanan ,  James Dirickson Mumford ,  Adnan Ozekcin

    发明人： Changmin Chun ,  Trikur Anantharaman Ramanarayanan ,  James Dirickson Mumford ,  Adnan Ozekcin

    IPC分类号： C23C8/22 ,  C23C8/80

    CPC分类号： C23C8/22 ,  C21D2211/009

    摘要： The present invention is directed to a process for producing pearlite from an iron containing article comprising the steps of, (a) heating an iron containing article comprising at least 50 wt % iron for a time and at a temperature sufficient to convert at least a portion of said iron from a ferritic structure to an austenitic structure, (b) exposing said austenitic structure, for a time sufficient and at a temperature of about 727 to about 900° C., to a carbon supersaturated environment to diffuse carbon into said austenitic structure and (c) cooling said iron containing article to form a continuous pearlite structure.

    摘要翻译： 本发明涉及一种用于从含铁制品制备珠光体的方法，包括以下步骤：（a）将包含至少50重量％的铁的含铁制品一段时间并在足以将至少一部分 的所述铁从铁素体结构转变为奥氏体结构，（b）将所述奥氏体结构暴露于碳过饱和环境中足够的时间并在约727℃至约900℃的温度下将碳扩散到所述奥氏体结构中 和（c）冷却所述含铁制品以形成连续的珠光体组织。