Abstract: The present invention provides a method of efficiently separating solid fat from polyunsaturated fatty acid grease. The method comprises adding a certain amount of inert material to the polyunsaturated fatty acid grease, and cooling crystallization, and then filtering through a filter to obtain clarified polyunsaturated fatty acid grease. Afterwards introducing hot gas through the filter to make solid fat adsorbed on a filter cake in the filter dissolved and then recycling it through a filter plate. Inert solid substances can be applied next time. The method of the present invention can be efficiently separated saturated and low-saturated fatty acids from polyunsaturated fatty acid grease. In the process, the winterization crystallization time is short, the crystallization is complete, the crystal separation is easy. It will not cause some solid fat melted and thus re-enter the filtrate due to long separation and blowing dry in conventional process. The yield of final product is high up to 89.8%-97.8%.

Abstract: A method of efficiently separating solid fat from polyunsaturated fatty acid grease (PFAG) comprises adding a small amount of inert material to the PFAG, and cooling crystallization, and then adding a certain amount of inert material under stirring, and filtering to obtain clarified PFAG, at the same time collecting a filter cake, heating and dissolving the filter cake, and then filtering, recovering a filtrate to obtain a solid fat. The method can be efficiently separated saturated and low-saturated fatty acids from PFAG. In the process, winterization crystallization time is short, crystallization is complete, the crystal separation is easy. It will not cause some solid fat melted and thus re-enter filtrate due to long separation and blowing dry in conventional process. The yield of final product is high up to 96.3%-98.2%. After winterization, a lipid clarity of PFAG is good, and no crystal precipitation would occur at 0° C. for 5 hrs.

Abstract: The invention makes public a method for preparing xanthophyll crystals with higher content of zeaxanthin from plant oleoresin. The current methods generally are to get quite pure crystal forms of xanthophyll or zeaxanthin, and they refer to several separation steps.

Abstract: The invention makes public a preparing method for xanthophyll crystals with higher content of zeaxanthin from plant oleoresin. The current methods generally are to get quite pure crystal forms of xanthophyll or zeaxanthin, and they refer to several separation steps.