Method of increasing the concentration of straight chain paraffin material

Claim 1

A method for increasing a concentration of straight-chain paraffin boiling in the range of 120° to 290° C. to 30 wt. % or more by reacting a thermal-cracked oil distillate boiling in the range of 120° to 290° C. and containing aliphatic olefins and a small amount of aromatics at a temperature of 0° to 330° C. in liquid phase in the presence of an acid catalyst, said thermal-cracked oil distillate being obtained from a delayed coking process of coking a patrolic heavy residual oil at a temperature not lower than 400° C. and not exceeding 700° C.; and then recovering by distillation a distillate boiling in the range of 120° C. to 290° C. from the acid catalyzed thermal-cracked oil distillate.

Claim 2

A method for increasing a concentration of straight-chain paraffin boiling in the range of 120° to 290° C. to 30 wt. % or more by reacting a thermal-cracked oil distillate boiling in the range of 120° to 290° C. and containing aliphatic olefins and a small amount of aromatics at a temperature of 0° to 330° C. in liquid phase in the presence of an acid catalyst, said thermal-cracked oil distillate being obtained from a delayed coking process of coking a patrolic heavy residual oil at a temperature not lower than 400° C. and not exceeding 700° C.; and then recovering by distillation a distillate boiling in the range of 120° C. to 290° C. from the acid catalyzed thermal-cracked oil distillate.

Claim 5

A method for increasing a concentration of a straight-chain paraffin boiling in the range of 120° to 290° C. to 30 wt. % or more by reacting a mixture containing aliphatic olefins and aromatics at a temperature of 0° to 330° C. in liquid phase in the presence of an acid catalyst to convert the aliphatic olefins and aromatics to heavier components by alkylation and oligomerization, said mixture comprising: (A) at least 10% by weight of a thermal-cracked oil distillate boiling in the range of 120° to 290° C. and containing aliphatic olefins and a small amount of aromatics, said thermal-cracked oil distillate being obtained from a delayed coking process of coking a petrolic heavy residual oil at a temperature not lower than 400° C. and not exceeding 700° C., and (B) one or more members boiling lower than said thermal-cracked oil distillate (A) and selected from: (a) a thermally-cracked by-product oil distillate obtained by thermal cracking of petrolic light oil at a temperature of 750° to 850° C., (b) a reformate distillate obtained by catalytic reforming of a petrolic light oil boiling in the range of 50° to 250° C. and (c) aromatic hydrocarbons, thereaftar recovering a distillate boiling in the range of 120° C. to 290° C. from the treated mixture by distillation.

Claim 6

A method for increasing a concentration of a straight-chain paraffin boiling in the range of 120° to 290° C. to 30 wt. % or more by reacting a mixture containing aliphatic olefins and aromatics at a temperature of 0° to 330° C. in liquid phase in the presence of an acid catalyst to convert the aliphatic olefins and aromatics to heavier components by alkylation and oligomerization, said mixture comprising: (A) at least 10% by weight of a thermal-cracked oil distillate boiling in the range of 120° to 290° C. and containing aliphatic olefins and a small amount of aromatics, said thermal-cracked oil distillate being obtained from a delayed coking process of coking a petrolic heavy residual oil at a temperature not lower than 400° C. and not exceeding 700° C., and (B) one or more members boiling lower than said thermal-cracked oil distillate (A) and selected from: (a) a thermally-cracked by-product oil distillate obtained by thermal cracking of petrolic light oil at a temperature of 750° to 850° C., (b) a reformate distillate obtained by catalytic reforming of a petrolic light oil boiling in the range of 50° to 250° C. and (c) aromatic hydrocarbons, thereaftar recovering a distillate boiling in the range of 120° C. to 290° C. from the treated mixture by distillation.