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公开(公告)号：US4211631A
公开(公告)日：1980-07-08
申请号：US921339
申请日：1978-07-03
摘要： In a coupled coal solvent liquefaction-gasification system wherein a recycle mineral residue-containing slurry is mixed with the raw coal feed slurry for the liquefaction zone, the resulting feed slurry is under a pumpability total solids level constraint. Where a coupled system is operating under such a total solids level contraint for the feed slurry, any increase in the mineral residue recycle rate relative to the coal feed rate advantageously provides a catalytic activity and selectivity advantage in favor of liquid coal product at the expense of higher and lower boiling products. It is shown herein that this activity and selectivity effect is enhanced with decreasing liquefaction zone residence times. In accordance with the present invention, the ratio of recycle mineral residue to feed coal is enhanced by recycling a second mineral residue-containing slurry to the liquefaction zone independently of the raw coal feed slurry. The amount of solids in the second recycle slurry can be established to compensate for a progressive reduction in solids level in the process slurry due to the dissolving of feed coal so that the process slurry continues to maintain the maximum total solids constraint in spite of progressive coal solvation.
摘要翻译： 在其中将含再循环矿物残渣的浆料与用于液化区的原料进料浆料混合的联合煤溶剂液化 - 气化系统中，所得到的原料浆料处于泵送性总固体含量水平的约束条件下。 如果耦合系统在进料浆料的这种总固体含量水平对齐下运行，则相对于煤进料速率，矿物残渣循环速率的任何增加有利地提供有利于液态煤产品的催化活性和选择性优点， 高低沸点产品。 这里显示，随着液化区停留时间的减少，该活性和选择性效应得到提高。 根据本发明，再循环矿物残渣与原料煤的比率通过将第二含矿物残渣的浆料再循环到液化区而与原料进料浆料无关地得到增强。 可以建立第二再循环浆料中的固体量以补偿由于进料煤的溶解而导致的工艺浆料中固体含量的逐渐降低，使得工艺浆料继续维持最大的总固体约束， 溶剂化
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公开(公告)号：US4203823A
公开(公告)日：1980-05-20
申请号：US921338
申请日：1978-07-03
摘要： This invention relates to a combination coal liquefaction-gasification process wherein hydrocarbonaceous mineral residue-containing slurry from the liquefaction zone is recycled to the liquefaction zone and all non-recycled hydrocarbonaceous mineral residue-containing slurry is passed to a gasification zone for conversion to synthesis gas to supply hydrogen for the liquefaction zone. It has now been discovered that in this process a surprisingly high reaction selectivity in favor of the desired distillate oil product is achieved by combining low liquefaction zone residence times and relatively high rates of recycle of mineral residue-containing slurry compared to feed coal rate. Under these conditions the yield of the desired distillate oil product can be increased to an unexpectedly high level while the yields of both higher and lower boiling products are each being decreased and while hydrogen consumption is being reduced.
摘要翻译： 本发明涉及一种组合煤液化气化方法，其中来自液化区的含有含烃矿物残渣的浆料被再循环到液化区，并且所有未回收的含烃矿物残渣的浆液通入气化区转化为合成气 为液化区供应氢气。 现在已经发现，在该方法中，通过将低液化区的停留时间和相对较高的含矿物残渣的浆料的再循环速率与进料煤速率相结合，实现了有利于所需馏出油产物的惊人的高反应选择性。 在这些条件下，所需的馏出油产物的产率可以提高到出乎意料的高水平，而高沸点产物和低沸点产物的产率都降低，而氢消耗量降低。
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