1) The decolour efficiency of brown sugar is 41%.

2) In a pan, to gain decolour cut shallots in hot oil.

3) Ozone has antiseptic, oxidation, decolour, wait for effect except flavour, use extensively at the industry such as equipment of pharmacy, medical treatment, water treatment, chemical industry.

4) The decolour principle and the best decolour conditions are studied in this paper.

5) Activated carbon is used as decolourant in this refinery process. Three operations are completed in the vacuum unit with activated carbon beyond 170 "C to dewater, decolour and deodorize corn oil."

6) The best results can be gained with decolour sesameseed oil of 2.5% added into lard oil and sesameseed oil of 5 % into rapeseed salad oil.

7) The results show that the decolour rate is more than 99% and the cost of treatment is low.

8) The decolour reaction of HCPCF with IO ? -? 3 in acid medium is reported.

9) Studying on 10X type molecular sieve to remove mercaptan, oxalic acid to remove alkalescence nitrogen and decolour with nature active clay were conducted.