| http://www.w3.org/ns/prov#value | - This process is not so effective because an large amount of an alkali is required to neutralize the washing aqueous solution, and also because a waste from the neutralization has to be treated.SUMMARY OF THE INVENTIONThe present invention provides a process to concentrate or remove HF or other components by forming an azeotropic mixture of HF and R-30, R-31 or R-32 and optionally utilizing liquid
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