Method for removing calcium, barium, magnesium and strontium from frac flowback
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United States of America Patent
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Nov 28, 2017
Grant Date -
Sep 26, 2013
app pub date -
Mar 14, 2013
filing date -
Mar 26, 2012
priority date (Note) -
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Abstract
A method of removing barium, calcium, strontium, and magnesium from frac flowback. A sulfate reagent and carbonate reagent are mixed with the frac flowback, causing barium, calcium, strontium, and magnesium to precipitate. The precipitants are crystallized and the resulting frac flowback and crystals are separated into relatively heavy solids and a stream of relatively light solids. The stream of relatively light solids is subjected to a further separation process that produces sludge that is recycled to aid in the crystallization process and a treated effluent which is recycled to the fracking operation or collected and used in another fracking operation.
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