Removal of aromatic impurities from an alkene stream using an acid catalyst

Patent metadata

Field	Value
Publication number	US-10144685-B2
Application number	US-201515116858-A
Country	US
Kind code	B2
Filing date	Feb 5, 2015
Priority date	Feb 7, 2014
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A process for the preparation of a chemical composition comprising an aromatic compound a in a concentration B by weight, based on the total weight of the chemical composition, including: providing the following reaction components: a chemical composition comprising the following: the aromatic compound a in a concentration A by weight based on the total weight of the chemical composition, and an olefin in an amount of about 50 to about 99.99 wt. %, based on the total weight of the chemical composition, and an acidic solid; reacting the components to obtain the chemical composition comprising the aromatic compound a in a concentration B by weight based on the total weight of the chemical composition; wherein the concentration B is less than the concentration A.

First claim

The invention claimed is:

1. A process for the preparation of a chemical composition comprising an aromatic compound α in a concentration B by weight, based on the total weight of the chemical composition, comprising:
a. providing the following reaction components:
i. a chemical composition comprising the following:
a) The aromatic compound α in a concentration A by weight based on the total weight of the chemical composition, and
b) An olefin in an amount of about 50 to about 99.99 wt. %, based on the total weight of the chemical composition, wherein the olefin is a C4-C10 olefin, and

ii. an acidic solid; and

b. reacting the components to obtain the chemical composition comprising the aromatic compound α in a concentration B by weight based on the total weight of the chemical composition;
wherein the concentration B is less than the concentration A;
wherein there is a greater than 96% reduction of benzene impurities by weight in the chemical composition.

2. The process according to claim 1 , wherein the olefin b) is an α-olefin.

3. The process according to claim 1 , wherein the concentration A is in an amount of about 2 ppm to about 10 wt. % based on the total weight of the chemical composition i.

4. The process according to claim 1 , wherein the ratio of concentration A:concentration B is about 1:0 to about 1:0.1.

5. The process according to claim 1 , wherein the aromatic compound α is benzene.

6. The process according to claim 1 , wherein a further olefin is present as a component of a), wherein the further olefin is different to the olefin b).

7. The process according to claim 1 , wherein the acidic solid is selected from a zeolite, a sulphated zirconia, an ion exchange resin, a porous solid impregnated with an acid, or a combination thereof.

8. The process according to claim 1 , wherein the acidic solid is a zeolite selected from analcime, chabazite, clinoptilolite, heulandite, natrolite, phillipsite, stilbite, or a combination thereof.

9. The process according to claim 1 , wherein the acidic solid is a sulphated zirconia, wherein the sulphated zirconia has a content of sulphate groups of about 1 mol/kg to about 10 mol/kg.

10. The process according to claim 1 , wherein the acidic solid is an ion exchange resin.

11. The process according to claim 1 , wherein the acidic solid is a porous solid impregnated with an acid.

12. The process according to claim 11 , wherein the acid comprises a Lewis acid, wherein the Lewis acid has the general formula
M a X b R c
wherein:
X is a halogen,
R is an alkyl group or hydrogen,
a is 1 or 2,
b is an integer of 0 to 3*a,
c is an integer equal to a*3−b, and

M is Al or B.

13. The process according to claim 11 , wherein the acid comprises an acidic ionic liquid, a protic compound, a Bronsted acid, or a combination comprising at least one of the foregoing.

14. The process according to claim 1 , wherein the acidic solid is present in step b. in a concentration of about 0.1 to about 50 wt. %, based on the total weight of the reaction components.

15. The process according to claim 1 , wherein the acidic solid is present in step b. in a concentration of about 1 to about 20 wt. %, based on the total weight of the reaction components.

16. The process according to claim 1 , wherein the reaction b. is carried out at a temperature of about 0 to about 250° C.

17. A process for the preparation of a downstream product comprising:
i. preparation of an alkene by a process according to claim 1 ; and
ii. reaction of the alkene to form the downstream product.

18. The process according to claim 17 , wherein the downstream product is a polymer.

19. The process according to claim 17 , wherein the downstream product is converted into a shaped body.

Assignees

• Saudi Basic Ind Corp

Inventors

• Schmidt Roland
• Azam Shahid

Classifications

• C10G17/02

  with acids or acid-containing liquids, e.g. acid sludge · CPC title

• C10G29/205 Primary

  by reaction with hydrocarbons added to the hydrocarbon oil · CPC title

• C10G2300/201

  Impurities · CPC title

• C07C7/171 Primary

  Sulfuric acid or oleum · CPC title

• C08F210/14

  Monomers containing five or more carbon atoms · CPC title