The present invention relates to a method for fractionating a crude mixture comprising at least one oil and at least one wax, which comprises the following method steps: (a) carrying out a pre-fractionation stage as a layer crystallization (i) with a crude mixture comprising at least one oil and at least one wax or (ii) with a crude solvent mixture obtained by adding prior to the pre-fractionation stage at most 100% by weight of solvent relative to the weight of the crude mixture, to prepare a first fraction containing low waxy oil and a second fraction containing low oily wax, (b) carrying out a first crystallization stage including (b1) a first suspension crystallization sub-stage with the first fraction containing low waxy oil to prepare a third fraction containing dewaxed oil and a fourth fraction and (b2) after the first suspension crystallization sub-stage, a second suspension crystallization sub-stage with a mixture of the fourth fraction obtained in method step (b1) and the second fraction containing low oily wax obtained in the pre-fractionation stage of method step (a) to prepare a fifth fraction containing slack wax and a sixth fraction.

The present invention relates to a process for the conversion of a low molecular weight polymeric byproduct obtained during production of high density polyethylene (HDPE), commonly known as low polymer wax (LPW) or polymer mud, into different products like different grades of paraffin wax, microcrystalline wax, lube and grease base stocks by a process comprising of thermal treatment in an inert atmosphere in the presence of organic peroxides or hydroperoxides and metal oxides. The end product depends upon the suitable selection of various process parameters like type of peroxides or hydroperoxides, metal oxides, temperature and duration of reaction.

The present invention relates to a process for the conversion of a low molecular weight polymeric byproduct obtained during production of high density polyethylene (HDPE), commonly known as low polymer wax (LPW) or polymer mud, into different products like different grades of paraffin wax, microcrystalline wax, lube and grease base stocks by a process comprising of thermal treatment in an inert atmosphere in the presence of organic peroxides or hydroperoxides and metal oxides. The end product depends upon the suitable selection of various process parameters like type of peroxides or hydroperoxides, metal oxides, temperature and duration of reaction.