Assertion: impure methionine | /r/HasProperty | obtained step
Facets:
value: by acid hydrolysis of methionine nitrile
type: MANNER
Source sentences:
text: In a process for purifying impure methionine obtained by acid hydrolysis of methionine nitrile the steps which comprise heating an aqueous solution of the said methionine with charcoal at a temperature of about to C., washing the resultant charcoal with water, and thereafter removing the said impurities from the charcoal by extraction with dilute sodium hydroxide, whereby the adsorbed methionine remains in the charcoal, washing the resultant charcoal with dilute sulfuric acid, and reusing the charcoal for purifying another batch of the said impure methionine.