Catalyst separation process
AssigneeDow Global Technologies LLC
InventorsMrunmayi Kumbhalkar, Wu Chen, Brian Murdoch, Haifeng Shi, Lin Zhao
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Abstract
A process for separating a catalyst component from a catalyst-containing slurry by centrifugation including separating the catalyst component from the mother liquor of the catalyst-containing slurry using a stacked disc centrifuge equipped with an auto-discharging functionality. The solids discharge from the stacked disc centrifuge is enhanced by adding a washing solution to the bowl and the solids discharge chute of the stacked disc centrifuge.
Claims10
A process for separating a fine catalyst component from a catalyst-containing slurry by separating the catalyst component from the mother liquor of the catalyst-containing slurry, the process comprising:
- (a) providing a stacked disc centrifuge equipped with an auto-discharging functionality;
- (b) providing a catalyst-containing slurry comprising a mixture of:
- (i) at least one catalyst compound that is a double metal cyanide;
- and (ii) at least one liquid component;
- (c) feeding the catalyst-containing slurry to the stacked disc centrifuge of step (a);
- (d) centrifuging, for a predetermined period of time, the catalyst-containing slurry to form a cake material of catalyst solids in the centrifuge and a centrate;
- wherein the centrate is removed substantially continuously from the centrifuge during this centrifuging step (d) and the catalyst solids content in the cake material is from 10 weight percent to 40 weight percent;
- and
- (e) removing the cake material from the centrifuge after the centrifugation of step (d).
Dependencies are inferred from the claim text.