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12 United States Patent 10 Patent No. US 7,083,516 B2

12 United States Patent 10 Patent No. US 7,083,516 B2.pdf

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Jul 14, 2004 - forming solvent such as methanol, ethanol, isopropanol, dichloromethane, MTB, ethyl acetate, butyl acetate, butanol, toluene or THF. The amount of residual water is determined by Karl-Fischer (KF) titration. Then, the remaining residue is absorptively precipitated with an organic solvent, such as methanol ...
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