Assertion: adsorbed methionine | /r/AtLocation | the charcoal
Facets:
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.
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 80 to 100 C., washing the resultant charcoal with water, and thereafter removing the said impurities from the charcoal by extraction with dilute aqueous alkali, whereby the adsorbed methionine remains in the charcoal, washing the resultant charcoal with dilute acid, and reusing the charcoal for purifying another batch of the said impure methionine.
text: In a process for purifying impure methionine obtained by acid hydrolysis of methionine nitrile, the steps which comprise subjecting an aqueous solution of the said methionine to the action of decolorizing charcoal, whereby the impurities in the said solution are adsorbed in the charcoal together with adsorbed methionine and thereafter removing the said impurities from the charcoal by extraction with dilute aqueous alkali, whereby the adsorbed methionine remains in the charcoal, washing the resultant charcoal with water and dilute acid, and reusing the charcoal for purifying another batch of the said impure methionine.