Patent ID: 11859132
Assignee: INDIAN OIL CORPORATION LIMITED
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A process for conversion of waste plastic pyrolysis oil into value added products, wherein the process comprises:
melting a waste plastic feedstock inside a preheating vessel, wherein the waste plastic feedstock is melted by a heavy coker gas oil (HCGO) to form a molten plastic stream;
pyrolyzing the molten plastic stream in a pyrolysis reactor in presence of nitrogen, wherein the pyrolysis reactor generates a char component from a bottom portion thereof, and a vapour component from a top portion thereof;
condensing the vapour component using a heat exchanger into a condensed stream, wherein the condensed stream is routed to a separator tower to separate gases and condensed liquid;
separating the condensed liquid in a two phase separator, wherein the condensed liquid is separated into a pyrolysis oil stream and water;
fractionating the pyrolysis oil stream through a fractionator into a heavier cut, and a lighter cut, wherein the lighter cut is fed directly to a light coker gas oil (LCGO) section of a delayed coker fractionator;
mixing a hot heavy residual feedstock, and the heavier cut of the pyrolysis oil stream to obtain a mixed stream, wherein the mixed stream is fed to the delayed coker fractionator wherein the mixed stream is further mixed with a condensed recycle to provide a resulting mixture, and pumping the resulting mixture through a coker furnace to achieve a desired coking temperature of 470° C. to 500° C.;
thermally cracking the resulting mixture inside the coker furnace, wherein the thermal cracking results in partial vaporization and mild cracking of the resulting mixture to give a two-phase mixture; and
thermally cracking the two-phase mixture inside a plurality of coke drums, wherein the heavier cut of the pyrolysis oil stream along with a heavy residue go through the thermal cracking resulting an effluent from the coke drum, coke, and a wash liquid.