Assertion: methionine | /r/HasProperty | admixed with coagulated tarry bodies
Facets:
Source sentences:
text: In a process for the preparation of methionine, the steps which comprise hydrolyzing methionine nitrile by reaction with hot dilute aqueous sulfuric acid, neutralizing the resultant reaction product to a pH of 5 to 6 by addition of ammonia, adding ammonium sulfate directly to the neutralization mixture, separating therefrom the resultant precipitate containing methionine admixed with coagulated tarry bodies, dissolving the said methionine in water, and thereafter 5 purifying the said methionine by recrystallization from water.
text: Other embodiments of the invention involve subjecting a solid mixture of crude methionine and ammonium sulfate (e. g.. a mixture of the solids, or a moist filler cake, containing methionine admixed with the coagulated tarry bodies and ammonium sulfate) to the action of a substantially saturated aqueous solution of methionine, whereby the amount of methionine in the said solid mixture increases while the solid ammonium sulfate is removed therefrom by solution in the aqueous phase.