Disclosed is a process for purification of a mixture of carotenoids from palm oil concentrate to produce a crystalline mixture of a null-carotene, null-carotene, null-carotene, and null,null-carotene as well as a product enriched in geometrical isomers of a null-carotene (9-cis-nullcarotene, 13-cis-null-carotene) and null-carotene as well as null,null-carotene and null-carotene.