oil refining

Question 1

Aim of refining

Answer 1

to remove ffa and toher objectionable substances including impurities

Question 2

characterisitics of refined oil

Answer 2

bland flavor and odor
clear appearance
stable to oxidation
suitable for frying
light colour

Question 3

crude oil component

Answer 3

95% tgc, 5% non tgc-ffa, phosphotlipids, ocidized products, metal ions, color pigments, tocopheraols

Question 4

gums in oil

Answer 4

hydratable. non-hydratable

Question 5

hydrolysis products of oils

Answer 5

diglycerides, monoglycerides, ffa, removed udring neutralisation step (chemi) or deodorization, distillation (phy)

Question 6

proteinaceuous matter, CHO, resins

Answer 6

removed during neutralisation

Question 7

colouring matter

Answer 7

removed during neutralisation and bleaching step

Question 8

odour-causong chemicals

Answer 8

removed by deodorization step

Question 9

waxes

Answer 9

removed by dewaxing step