Methods of producing isomerization catalysts

Patent metadata

Field	Value
Publication number	US-11517892-B2
Application number	US-201916701793-A
Country	US
Kind code	B2
Filing date	Dec 3, 2019
Priority date	Dec 3, 2019
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

Methods of producing an isomerization catalyst include preparing a catalyst precursor solution, hydrothermally treating the catalyst precursor solution to produce a magnesium oxide precipitant, and calcining the magnesium oxide precipitant to produce the isomerization catalyst. The catalyst precursor solution includes at least a magnesium precursor, a hydrolyzing agent, and polyethylene glycol. Methods of producing propene from a butene-containing feedstock with the isomerization catalyst and a metathesis catalyst are also disclosed.

First claim

What is claimed is:

1. A method of producing an isomerization catalyst, the method comprising:
preparing a catalyst precursor solution comprising at least a magnesium precursor, a hydrolyzing agent, and polyethylene glycol, where the molar ratio of the magnesium precursor to polyethylene glycol in the catalyst precursor solution is from 1:0.01 to 1:0.1;
hydrothermally treating the catalyst precursor solution to produce a magnesium oxide precipitant; and
calcining the magnesium oxide precipitant to produce the isomerization catalyst.

2. The method of claim 1 , where the molar ratio of the magnesium precursor to the hydrolyzing agent in the catalyst precursor solution is from 1:10 to 1:1.

3. The method of claim 1 , further comprising adjusting the pH of the catalyst precursor solution.

4. The method of claim 3 , where the pH of the catalyst precursor solution is adjusted to a pH of from 3 to 7.

5. The method of claim 3 , where the pH of the catalyst precursor solution is adjusted to a pH of from 8 to 12.

6. The method of claim 1 , where hydrothermally treating the catalyst precursor solution comprises heating the catalyst precursor solution to a temperature of from 100° C. to 140° C. for a duration of from 48 hours to 96 hours.

7. The method of claim 1 , where the surface area of the isomerization catalyst is from 125 m 2 /g to 225 m 2 /g.

Assignees

• Saudi Arabian Oil Co

Inventors

• Alghannam Afnan
• Shaikh Sohel K
• Khokhar Munir D
• Alshafei Faisal H

Classifications

• B01J23/30

  Tungsten · CPC title

• C07C5/2512

  with metal oxides · CPC title

• B01J23/02 Primary

  of the alkali- or alkaline earth metals or beryllium · CPC title

• B01J37/10

  in the presence of water, e.g. steam · CPC title

• C07C2521/10

  Magnesium; Oxides or hydroxides thereof · CPC title