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US 8,901,335 B2Granted
Organometallic compound purification and apparatus
AssigneeDow Global Technologies LLC
InventorsCurtis D. Modtland, Chet D. Davidson
Life of this patent
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Abstract
A method of purifying crude organometallic compounds using a stripping column and a gas stream is provided. This method removes relatively more volatile impurities as compared to the organometallic compound.
Claims12
A method of continuously purifying an organometallic compound comprising:
- (a) providing a crude organometallic compound in a liquid phase;
- (b) providing a stripping column having a first portion with a first inlet and a first outlet and a second portion with a second inlet and a second outlet;
- (c) feeding the crude organometallic compound in the liquid phase to the first portion of the stripping column through the first inlet;
- (d) feeding an inert gas stream to the second portion of the stripping column through the second inlet;
- (e) directing the crude organometallic compound through the stripping column opposite to a flow of the inert gas stream;
- and (f) collecting organometallic compound in the liquid phase from the second outlet, wherein the collected organometallic compound is purified as compared to the crude organometallic compound as it enters the stripping column.
3 more elements
Dependencies are inferred from the claim text.