Removal of aromatic impurities from an alkene stream using an acid catalyst, such as an acidic ionic liquid

Patent metadata

Field	Value
Publication number	US-2016355451-A1
Application number	US-201515116908-A
Country	US
Kind code	A1
Filing date	Feb 5, 2015
Priority date	Feb 7, 2014
Publication date	Dec 8, 2016
Grant date	—

Abstract

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, includes: 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, and ii. an acid; 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.

First claim

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 in an amount of about 50 to about 99.99 wt. %, based on the total weight of the chemical composition, and
ii. An acid selected from an acidic ionic liquid, a protic compound, an ammonium, an imidazolium, an anion selected from AlCl 4 − , AlBr 4 − , AlI 4 − , BF 4 − , PF 6 − , CF 3 SO 3 − , [(CF 3 SO 2 ) 2 N] − , toslyate, or a combination comprising at least one of the foregoing, or a combination comprising at least one of the foregoing; 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.

2 . The process according to claim 1 , wherein the olefin b) is an α-olefin, comprising a C 2 -C 20 olefin.

3 . (canceled)

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

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

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

7 . 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).

8 . The process according to claim 7 , wherein the further olefin is a C 2 -C 20 olefin.

9 . The process according to claim 1 , wherein the acid comprises an acidic ionic liquid or wherein the acid comprises a protic compound.

10 . (canceled)

11 . The process according to claim 1 , wherein the acid comprises an ammonium.

12 . The process according to claim 11 , wherein the ammonium has the general formula NR 4 , wherein R is hydrocarbon or hydrogen, and wherein each R can be the same as or different to the other R in the molecule.

13 . (canceled)

14 . The process according to claim 1 , wherein the acid comprises an imidazolium.

15 . The process according to claim 14 , wherein the imidazolium has the general formula

wherein R 2 is alkyl;
wherein each of R 1 , R 3 , R 4 is hydrocarbon or hydrogen; and
wherein R 1 , R 2 , R 3 , R 4 within a molecule can be the same as or different to each other.

16 . (canceled)

17 . The process according to claim 15 , wherein R 2 is butyl and R 1 , R 2 and R 3 have one of the following configurations:
a. R 1 , R 3 and R 4 are hydrogen; b. R 1 and R 3 are hydrogen and R 4 is alkyl; c. R 1 and R 4 are hydrogen and R 3 is alkyl; and d. R 4 and R 3 are hydrogen and R 1 is alkyl.

18 . The process according to claim 1 , wherein the acid comprises an anion selected from AlCl 4 − , AlBr 4 − , AlI 4 − , BF 4 − , PF 6 − , CF 3 SO 3 − , [(CF 3 SO 2 ) 2 N] − , tosylate, or a combination comprising at least one of the foregoing.

19 . The process according to claim 1 , wherein the acid 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.

20 . (canceled)

21 . The process according to claim 1 , wherein the chemical composition i. is a homogeneous liquid.

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

23 . 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.

24 . The process according to claim 23 , wherein the downstream product is a polymer.

25 . The process according to claim 23 , wherein the downstream product is a polythene or a polypropene.

26 . (canceled)

Assignees

• Saudi Basic Ind Corp

Inventors

• Schmidt Roland
• Azam Shahid

Classifications

• C07C2527/125

  Compounds comprising a halogen and scandium, yttrium, aluminium, gallium, indium or thallium · CPC title

• C10G50/00

  Production of liquid hydrocarbon mixtures from lower carbon number hydrocarbons, e.g. by oligomerisation · CPC title

• C07C2/68

  with halides · CPC title

• C10G2300/1088

  Olefins · CPC title

• C10G17/09

  with acid salts · CPC title