Manufacturing hydrocarbons

Patent metadata

Field	Value
Publication number	US-10858599-B2
Application number	US-201916541553-A
Country	US
Kind code	B2
Filing date	Aug 15, 2019
Priority date	Aug 22, 2018
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

Systems and a method for manufacturing a base stock from a hydrocarbon stream are provided. An example method includes cracking the hydrocarbon stream to form a raw hydrocarbon stream, separating an ethylene stream from the raw hydrocarbon stream and oligomerizing the ethylene stream to form a raw oligomer stream. A light olefinic stream is distilled from the raw oligomer stream and linear alpha olefins are recovered from the light olefinic stream. A heavy olefinic stream is distilled from the raw oligomer stream. The heavy olefinic stream is hydro-processed to form a hydro-processed stream. The hydro-processed stream is distilled to form the base stock.

First claim

The invention claimed is:

1. A method for manufacturing a base stock from a hydrocarbon stream, comprising:
cracking the hydrocarbon stream to form a raw hydrocarbon stream;
separating an ethylene stream from the raw hydrocarbon stream;
oligomerizing the ethylene stream to form a raw oligomer stream;
distilling a light olefinic stream, an intermediate olefinic stream, and a heavy olefinic stream from the raw oligomer stream;
recovering the light olefinic stream;
subjecting the heavy olefinic stream to hydrodemetallation to form a first hydro-processes stream;
alkylating the intermediate olefinic stream to form an alkylated stream;
distilling the alkylated stream to form a lights stream and a heavies stream;
subjecting the first hydro-processed and the heavies stream to hydrocracking and/or hydroisomerization to form a second hydro-processed stream;
recycling the lights stream to the intermediate olefinic stream and;
distilling the second hydro-processed stream to form the base stock.

2. The method of claim 1 , wherein said oligomerizing the ethylene stream comprises contacting the ethylene stream with a homogenous catalyst comprising an iron (II) pyridine-bis-imine comprising a structure of:

wherein Rn comprises one, two, or three substituents; and wherein the substituents comprise CH 3 , F, or both.

3. The method of claim 1 , comprising:
separating an unreacted ethylene stream from the raw oligomer stream; and
recycling the unreacted ethylene stream to the ethylene stream.

4. The method of claim 1 , wherein said distilling the second hydro-processed stream comprises separating a distillate stream, a naphtha stream, or both from the second hydro-processed stream.

5. The method of claim 1 , wherein said distilling the second hydro-processed stream comprises forming a heavy neutral oil stock stream, a medium neutral oil stock stream, or a light neutral oil stock stream, or any combinations thereof.

Assignees

• Exxonmobil Res & Eng Co

Inventors

• Ho Suzzy C
• Cao Guang
• Ide Matthew S
• Luo Shifang
• Gunther William R
• Canich Jo Ann M

Classifications

• C10G67/02 Primary

  plural serial stages only · CPC title

• C10G50/02

  of hydrocarbon oils for lubricating purposes · CPC title

• C10G2400/20

  C2-C4 olefins · CPC title

• C10G2400/10

  Lubricating oil · CPC title

• C10G7/00 Primary

  Distillation of hydrocarbon oils · CPC title