A process for stabilization of an unstable raw hydrocarbonaceous product

Abstract

A first aspect of the invention relates to a process for production of a stabilized hydrocarbon product from solid feedstock, said method comprising the steps of, providing a solid feedstock for thermal decomposition, directing said solid feedstock for thermal decomposition to a thermal decomposition process to provide a fluid product of thermal decomposition and a solid phase, directing as raw feedstock at least an amount of said fluid product of thermal decomposition and an amount of hydrogen to contact a material catalytically active in hydrogenation of conjugated diolefinic carbon-carbon bonds under active conditions for hydrogenation of conjugated diolefinic carbon-carbon bonds, characterized in the ratio between hydrogen and raw feedstock is from 1 Nm 3 /m 3 to 100 Nm 3 /m 3 . This has the associated benefit of such a process requiring only a low amount of hydrogen, while still providing a stabilized hydrocarbon product for transport.

1 . A process for production of a stabilized hydrocarbonaceous product from solid feedstock, said method comprising the steps of
 (a) providing a solid feedstock for thermal decomposition   (b) directing said solid feedstock for thermal decomposition to a thermal decomposition process to provide a fluid product of thermal decomposition and a solid phase,   (c) directing to a catalytic process as raw liquid feedstock at least an amount of said fluid product of thermal decomposition and an amount of hydrogen to contact a material catalytically active in hydrogenation of conjugated diolefinic carbon-carbon bonds under active conditions for hydrogenation of conjugated diolefinic carbon-carbon bonds to provide said stabilized hydrocarbonaceous product, wherein said catalytic process may have several catalytically distinct steps, and where raw liquid feedstock and hydrogen are added together or independently in one or more positions,   (d) and withdrawing said stabilized hydrocarbonaceous product for transport or storage optionally after removal of an aqueous phase or other impurities,   wherein ratio of the total amount of added hydrogen to the amount of raw liquid feedstock is from 1 Nm 3 /m 3  to 100 Nm 3 /m 3 .   
     
     
         2 . A process according to  claim 1  wherein the ratio of the total amount of added hydrogen to the amount of raw liquid feedstock is from 1,2, 5 or 10 Nm 3 /m 3  50 Nm 3 /m 3 . 
     
     
         3 . A process according to  claim 1 , wherein the solid feedstock comprises at least 50% waste polymer. 
     
     
         4 . A process according to  claim 1 , further involving separating said fluid product of thermal decomposition in at least a polar liquid phase and a non-polar liquid phase. 
     
     
         5 . A process according to  claim 1 , wherein the active hydrogenation conditions involving a pressure being from 0.5 MPa to 35 MPa. 
     
     
         6 . A process according to  claim 1 , wherein the active hydrogenation conditions involving an inlet temperature from 80 to 210° C. 
     
     
         7 . A process according to  claim 1 , wherein said material catalytically active in hydrogenation comprising at least one of Ni, Co, Mo, W and Pd. 
     
     
         8 . A process according to  claim 1 , wherein said hydrogen being provided at least in part by reaction of an amount of said fluid product of thermal decomposition, optionally employing electrical heating. 
     
     
         9 . A process according to  claim 1 , wherein said hydrogen being produced at least in part by electrolysis optionally employing electricity produced from excess process heat or from a renewable energy source, such as solar energy, wind energy or wave energy. 
     
     
         10 . A process according to  claim 1 , wherein the thermal decomposition product prior to contacting the material catalytically active in hydrotreatment is cooled to at a temperature between 20° C. and 230° C. 
     
     
         11 . A process according to  claim 1 , in which the amount of solid feedstock is at least 10 ton/day and less than 2000 ton/day. 
     
     
         12 . A process according to  claim 1 , in which the stabilized hydrocarbon product is transferred to a means of transportation such as a tank or a pipeline and transported to an upgrade facility for upgrading into a hydrocarbon product. 
     
     
         13 . A process plant for carrying out a process according to  claim 1 .