Production of linear alpha olefins

Patent metadata

Field	Value
Publication number	US-11548841-B2
Application number	US-202117448965-A
Country	US
Kind code	B2
Filing date	Sep 27, 2021
Priority date	Sep 28, 2020
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

The present invention provides a novel route for synthesis and production of linear alpha olefins (LAO) and central olefins from the feedstock comprising fatty acids, triglycerides and esters of fatty acids, and mixture thereof through controlled hydrogenolysis, hydrogenation and dehydration reactions simultaneously in a hydro processing reactor containing a catalyst system having dual site—a metallic site for hydrogenation/reduction reaction under hydrogen environment, and an acidic site for conversion of alcohol to olefin via E1 or E2 reaction mechanism.

First claim

What is claimed is:

1. A process for production of linear alpha olefins (LAO) and central olefins, wherein the process comprises:
a) sending a feedstock through a hydro processing reactor, comprising a catalyst system, wherein the catalyst system comprises a dual site catalyst, wherein the dual site catalyst comprises a metal site and an acidic site;
b) performing controlled hydrogenolysis, hydrogenation and dehydration reactions simultaneously of the feedstock under hydrogen environment to obtain a product mixture comprising linear alpha olefins (LAO), central olefins, paraffins, and aromatics; and
c) purifying and extracting the linear alpha olefins and the central olefins from the product mixture along with byproducts;
wherein the feedstock is a single type used cooking oil (UCO) or blends of multiple types of UCO and the feedstock comprises fatty acids, triglycerides and esters of fatty acids, naphthenic acids, and mixtures thereof.

2. The process as claimed in claim 1 , wherein the hydrogenolysis, hydrogenation, and dehydration reactions are performed at a pressure in a range of 1 to 100 bars.

3. The process as claimed in claim 1 , wherein the hydrogenolysis, hydrogenation, and dehydration reactions are performed at a weighted average catalyst bed temperature (WABT) in a range of 50° C. to 450° C.

4. The process as claimed in claim 1 , wherein the hydrogenolysis, hydrogenation, and dehydration reactions are performed at a hydrogen to hydrocarbon ratio in a range of 5 to 500 Nm 3 /m 3 .

5. The process as claimed in claim 1 , wherein the hydrogenolysis, hydrogenation, and dehydration reactions are performed at a contact time in a liquid hourly space velocity (LHSV) in a range of 0.1 to 20 h −1 .

6. The process as claimed in claim 1 , wherein the byproducts comprise saturates, aromatics and glycerol.

Assignees

• Indian Oil Corp Ltd

Inventors

• Hima Bindu Vasamsetty Naga Veera
• Sarkar Mainak
• Butley Ganesh Vitthalrao
• Kumar Ajay
• Mondal Sujit
• Karumanchi Ramesh
• Kumar Sarvesh
• Sau Madhusudan
• Kapur Gurpreet Singh
• RAMAKUMAR Sankara Sri Venkata

Classifications

• C07C7/10

  by extraction, i.e. purification or separation of liquid hydrocarbons with the aid of liquids · CPC title

• C07C7/08

  by extractive distillation · CPC title

• C10G2400/22

  Higher olefins · CPC title

• C10G2300/1007

  Used oils · CPC title

• C10G3/50 Primary

  in the presence of hydrogen, hydrogen donors or hydrogen generating compounds · CPC title