

Extracţia - Concept şi Utilizări
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
lung ana daniela
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20 questions
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1.
FLASHCARD QUESTION
Front
Ce este extracţia?
Back
Extracţia este operaţia unitara de separare a componentelor dintr-un amestec omogen lichid sau solid, pe baza diferenţei de solubilitate a acestora într-un solvent selectiv.
2.
FLASHCARD QUESTION
Front
Care sunt cele două tipuri de extracţie lichidă?
Back
1. Extracţie lichid-lichid (pentru amestecuri lichide) 2. Extracţie lichid-solid (pentru faze solide).
3.
FLASHCARD QUESTION
Front
Când se utilizează extracţia?
Back
Se utilizează când soluţia iniţială formează un amestec azeotrop sau când componenţii au puncte de fierbere apropiate.
4.
FLASHCARD QUESTION
Front
Care sunt utilizările extracţiei în industria farmaceutică?
Back
1. Recuperarea şi purificarea unui component din soluţie. 2. Îndepărtarea impurităţilor din soluţia care conţine componentul valoros.
5.
FLASHCARD QUESTION
Front
Ce procese de extracţie sunt utilizate în industria chimică?
Back
1. Rafinarea uleiurilor minerale. 2. Îndepărtarea mercaptanilor din produsele petroliere. 3. Separarea fracţiunilor de acizi graşi.
6.
FLASHCARD QUESTION
Front
Ce este faza de extract în extracţia lichid-lichid?
Back
Faza bogată în solvent, care conţine aproape toată cantitatea de component B.
7.
FLASHCARD QUESTION
Front
Ce este faza de rafinat în extracţia lichid-lichid?
Back
Faza săracă în solvent, care conţine aproape toată cantitatea de component A.
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