Methods for low temperature production of 1-butene

Patent metadata

Field	Value
Publication number	US-11319263-B1
Application number	US-202117190908-A
Country	US
Kind code	B1
Filing date	Mar 3, 2021
Priority date	Mar 3, 2021
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

Methods of producing 1-butene from a 2-butene-containing feedstock include feeding a hydrocarbon feed comprising 2-butene to a reactor, the reactor containing an isomerization catalyst and contacting the hydrocarbon feed with the isomerization catalyst in the reactor at a temperature from 150° C. to 350° C. to produce an isomerization reaction effluent comprising 1-butene. Further, the isomerization catalyst comprises a MCM-48 catalyst with WO3 incorporated into a silica framework of the MCM-48 catalyst.

First claim

What is claimed is:

1. A method of producing 1-butene from a 2-butene-containing feedstock, the method comprising:
feeding a hydrocarbon feed comprising 2-butene to a reactor, the reactor containing an isomerization catalyst; and
contacting the hydrocarbon feed with the isomerization catalyst in the reactor at a temperature from 150° C. to 350° C. to produce an isomerization reaction effluent comprising 1-butene,
wherein the isomerization catalyst comprises a MCM-48 catalyst with WO 3 incorporated into a silica framework of the MCM-48 catalyst, where the average pore width in accordance with BJH Adsorption of the isomerization catalyst is 6 Å to 18 Å.

2. The method of claim 1 where the reactor is operated at 200 to 300° C. to produce the isomerization reaction effluent comprising 1-butene.

3. The method of claim 1 where the BET surface area of the isomerization catalyst is 550 m 2 /g to 1000 m 2 /g.

4. The method of claim 1 where at least 10% by weight of the 2-butene in the hydrocarbon feed is converted to 1-butene in the isomerization reaction effluent.

5. The method of claim 1 where at least 20% by weight of cis-2-butene in the hydrocarbon feed is converted to isomers of the cis-2-butene in the isomerization reaction effluent.

6. The method of claim 1 where at least 35% by weight of cis-2-butene in the hydrocarbon feed is converted to isomers of the cis-2-butene in the isomerization reaction effluent.

7. The method of claim 1 where less than 2% by weight of the hydrocarbon feed is converted to C 1 -C 3 hydrocarbons in the isomerization reaction effluent.

8. The method of claim 1 where the isomerization catalyst comprises 8 to 12 wt. % of the WO 3 .

9. The method of claim 1 where the WO 3 is incorporated into the silica framework of the MCM-48 catalyst by an incipient wetness impregnation method.

10. The method of claim 9 where the incipient wetness impregnation method comprises:
adding ammonium metatungstate hydrate dissolved in water to the MCM-48 catalyst in a controlled manner to form an isomerization catalyst precursor;
drying the isomerization catalyst precursor; and
calcining the isomerization catalyst precursor which has been dried at 450° C. to 650° C. for at least 1 hour.

11. The method of claim 10 where calcining the isomerization catalyst precursor which has been dried comprises an initial period at 150° C. to 350° C. followed by an increase to 450° C. to 650° C. at a ramp rate of 1° C. per minute.

12. The method of claim 1 where the 2-butene in the hydrocarbon feed is provided to the isomerization catalyst in the reactor at a weight hourly space velocity of from 1 h −1 to 10 h −1 .

13. The method of claim 1 where the 2-butene in the hydrocarbon feed is provided to the isomerization catalyst in the reactor at a weight hourly space velocity of from 1 h −1 to 3.5 h −1 .

14. The method of claim 1 where the reactor is free of MgO based catalyst.

15. The method of claim 1 where the reactor is free of a second isomerization catalyst.

Assignees

• Saudi Arabian Oil Co

Inventors

• Alghannam Afnan
• Khokhar Munir D
• Shaikh Sohel K

Classifications

• B01J37/0201

  Impregnation · CPC title

• B01J6/001

  Calcining · CPC title

• B01J23/30 Primary

  Tungsten · CPC title

• B01J29/0308

  Mesoporous materials not having base exchange properties, e.g. Si-MCM-41 · CPC title

• C07C2529/78

  containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium · CPC title