Back to results
US 2019/0337869 A1Published application
System and method for production of chemical feedstock from crude oil
AssigneesUop LLC, Sabic Global Technologies B.V.
InventorsSelman Ziya Erisken, Heinrich Manfred Schrod
Life of this patent
Estimating the term…
Abstract
The present disclosure provides a system and method for converting crude oil to light hydrocarbon products useful as a chemical feedstock. The system may also include a conversion system, such as a steam cracking unit, that converts the chemical feedstock from the feed preparation system to useful hydrocarbon chemicals. Exemplary hydrocarbon chemicals produced by the conversion system include light olefins, such as ethylene, propylene, and/or butadiene.
Claims18
A system for converting a crude oil feedstock to a chemical feedstock for a steam cracker unit, the system comprising:
- a distillation unit that separates the crude oil feedstock into at least:
- a hydrocarbon gas fraction;
- a naphtha fraction;
- a middle distillate fraction;
- and
- a residue fraction;
- a first isomerization unit having a first input that receives the hydrocarbon gas fraction from the distillation unit and a first output, the first isomerization unit establishing equilibrium by converting a branched butane in the first input to a normal butane in the first output;
- a naphtha hydrotreating unit that receives the naphtha fraction from the distillation unit, the naphtha hydrotreating unit saturating the naphtha fraction;
- a middle distillate hydrotreating unit that receives the middle distillate fraction from the distillation unit, the middle distillate hydrotreating unit saturating the middle distillate fraction;
- a residue hydrotreating unit that receives the residue fraction from the distillation unit, the residue hydrotreating unit saturating the residue fraction;
- a cracking unit that receives the saturated residue fraction from the residue hydrotreating unit, the cracking unit converting the saturated residue fraction into at least:
- an unsaturated gas fraction;
- a light hydrocarbon fraction rich in olefins and aromatics;
- a light cycle oil fraction rich in rich in multi-ring aromatics;
- and
- a heavy waste fraction;
- a butene processing unit that receives the unsaturated gas fraction from the cracking unit, the butene processing unit producing at least an iso-butane rich fraction;
- a second isomerization unit having a second input that receives the light hydrocarbon fraction from the cracking unit and a second output, the second isomerization unit establishing equilibrium by converting a branched pentane and a branched hexane in the second input to a normal pentane and a normal hexane in the second output;
- and
- an aromatic saturation unit that receives the light cycle oil fraction from the cracking unit, the aromatic saturation unit saturating the light cycle oil fraction and producing a naphthene-rich fraction;
- and
- wherein the chemical feedstock to the steam cracker unit includes at least:
- the first output from the first isomerization unit;
- the saturated naphtha fraction from the naphtha hydrotreating unit;
- the saturated middle distillate fraction from the middle distillate hydrotreating unit;
- the second output from the second isomerization unit;
- and
- the naphthene-rich fraction from the aromatic saturation unit.
25 more elements
A method for converting a crude oil feedstock to a chemical feedstock for a steam cracker unit, the method comprising the steps of:
- separating the crude oil feedstock into at least:
- a hydrocarbon gas fraction;
- a naphtha fraction;
- a middle distillate fraction;
- and
- a residue fraction;
- converting a branched butane in the hydrocarbon gas fraction to a normal butane in a first isomerization unit by establishing equilibrium in the first isomerization unit;
- saturating the naphtha fraction in a naphtha hydrotreating unit;
- saturating the middle distillate fraction in a middle distillate hydrotreating unit;
- saturating the residue fraction in a residue hydrotreating unit;
- converting the saturated residue fraction in a cracking unit into at least:
- an unsaturated gas fraction;
- a light hydrocarbon fraction rich in olefins and aromatics;
- a light cycle oil fraction rich in rich in multi-ring aromatics;
- and
- a heavy waste fraction;
- converting the unsaturated gas fraction into at least an iso-butane rich fraction in a butene processing unit;
- converting a branched pentane and a branched hexane in the light hydrocarbon fraction to a normal pentane and a normal hexane in a second isomerization unit by establishing equilibrium in the second isomerization unit;
- saturating the light cycle oil fraction in an aromatic saturation unit to produce a naphthene-rich fraction;
- and
- directing the chemical feedstock to the steam cracker unit, wherein the chemical feedstock includes at least:
- the normal butane from the first isomerization unit;
- the saturated naphtha fraction from the naphtha hydrotreating unit;
- the saturated middle distillate fraction from the middle distillate hydrotreating unit;
- the normal pentane and the normal hexane from the second isomerization unit;
- and
- the naphthene-rich fraction from the aromatic saturation unit.
24 more elements
Dependencies are inferred from the claim text.