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    Dewaxing by a combination centrifuge/catalytic process including solvent deoiling
    4.
    发明授权
    Dewaxing by a combination centrifuge/catalytic process including solvent deoiling 失效
    通过组合离心机脱蜡/催化过程，包括溶剂脱油

    公开(公告)号：US4477333A

    公开(公告)日：1984-10-16

    申请号：US552701

    申请日：1983-11-17

    申请人： Mahmoud M. Hafez

    发明人： Mahmoud M. Hafez

    IPC分类号： C10G73/02 ,  C10G73/06 ,  C10G73/28

    CPC分类号： C10G73/02

    摘要： A hydrocarbon dewaxing process comprising the steps of:(a) chilling the waxy hydrocarbon feed to be dewaxed in the absence of solvent to crystallize a portion of the hard wax;(b) introducing the hydrocarbon feed to be dewaxed into a centrifuge;(c) centrifuging the solvent free hydrocarbon feed thereby generating two streams, stream (I) comprising a major portion of oil with a minor portion of entrained wax, stream (II) comprising a major portion of wax with a minor portion of entrained oil;(d) adding a dewaxing solvent to stream (II) generating a slurry A;(e) feeding slurry A to a centrifuge thereby separating slurry A into an oil-solvent stream (III) and a wax-solvent stream (IV);(f) passing the oil-solvent stream (III) to a membrane separation unit wherein the stream is separated into a recycle solvent stream and an oil-solvent stream of reduced solvent content (stream V);(g) passing oil-solvent stream (V) to an oil recovery unit wherein the stream is separated into a recycle solvent stream and an oil stream (VI);(h) passing the wax-solvent stream (IV) of step (e) to a wax recovery unit wherein the stream is separated into a recycle solvent stream and a recovered wax product stream;(i) combining wax-oil stream (I) of step (c) with oil stream (VI) of step (g) and passing the combined stream to a catalytic dewaxing unit wherein the combined waxy oil stream, in the presence of hydrogen, is contacted with a catalyst and has its wax content reduced, thereby generating a dewaxed oil product stream.

    摘要翻译： 一种烃脱蜡方法，包括以下步骤：（a）在不存在溶剂的情况下使待脱蜡的蜡质烃进料冷却以使一部分硬蜡结晶; （b）将要脱蜡的烃进料引入离心机中; （c）离心无溶剂的烃进料，从而产生两股料流，包含主要部分油的少量部分夹带蜡的料流（I），包含主要部分蜡的少量夹带油的料流（II）; （d）向产生浆料A的料流（II）中加入脱蜡溶剂; （e）将浆料A供给到离心机中，从而将浆料A分离成油溶剂流（III）和蜡 - 溶剂流（IV）; （f）使油溶剂流（III）通过膜分离单元，其中流被分离成循环溶剂流和减少溶剂含量的油溶剂流（流V）; （g）将油溶剂流（V）通入油回收单元，其中流被分离成循环溶剂流和油流（VI）; （h）将步骤（e）的蜡 - 溶剂流（IV）通入蜡回收单元，其中将物流分离成循环溶剂流和回收的蜡产物流; （i）将步骤（c）的蜡 - 油流（I）与步骤（g）的油流（VI）组合，并将合并的流送入催化脱蜡装置，其中在氢气存在下， 与催化剂接触并且其蜡含量降低，从而产生脱蜡油产品流。