Assertion: ethylene glycol | /r/HasProperty | contaminated with acetals of ethylene glycol
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Source sentences:
text: 4. irocess for purifying ethylene glycol contaminated with impurities including acetals of ethylene glycol which can be hydrolized to products capable of being separated from the ethylene glycol by azeotropic distillation with water, which comprises diluting the contaminated ethylene glycol with water, acidifying the aqueous ethylene glycol solution with a mineral acid which is substantially non-volatile at distillation temperatures up to the boiling point of ethylene glycol selected from the group consisting of sulphuric acid, phosphoric acid, and hydrochloric acid, and then substantially dehydrating the acidified aqueous ethylene glycol solution, neutralizing the dehydrated ethylene glycol and distilling the neutralized ethylene glycol.