Method for purifying supply flows containing aromates by means of zeolites
Processes suitable for purifying aromatic-containing feed streams, and processes using such purified streams are described, wherein the purification processes comprise: (a) providing a process feedstream comprising an aromatic component; and (b) bringing the process feedstream into contact with a first zeolite and a second zeolite; wherein the first zeolite has a mean pore size of 0.3 to 0.5 nm, and wherein the second zeolite has a mean pore size of 0.6 to 0.8 nm.
1. A process comprising:
(a) providing a process feedstream comprising an aromatic component; and
(b) bringing the process feedstream into contact with a first zeolite and a second zeolite;
wherein the first zeolite has a mean pore size of 0.3 to 0.5 nm, and wherein the second zeolite has a mean pore size of 0.6 to 0.8 nm.
2. The process according to claim 1 , wherein the aromatic component comprises benzene.
3. The process according to claim 1 , wherein the first zeolite is present in an amount of 30 to 70% by weight, and wherein the second zeolite is present in an amount of 30 to 70% by weight, based on a combined total weight of the first zeolite and the second zeolite.
4. The process according to claim 2 , wherein the first zeolite is present in an amount of 30 to 70% by weight, and wherein the second zeolite is present in an amount of 30 to 70% by weight, based on a combined total weight of the first zeolite and the second zeolite.
5. The process according to claim 1 , wherein the first zeolite has a mean pore size of 0.38 to 0.42 nm.
6. The process according to claim 1 , wherein the second zeolite has a mean pore size of 0.68 to 0.72 nm.
7. The process according to claim 1 , wherein the first zeolite has a mean pore size of 0.38 to 0.42 nm, and wherein the second zeolite has a mean pore size of 0.68 to 0.72 nm.
8. The process according to claim 2 , wherein the first zeolite has a mean pore size of 0.38 to 0.42 nm, and wherein the second zeolite has a mean pore size of 0.68 to 0.72 nm.
9. The process according to claim 3 , wherein the first zeolite has a mean pore size of 0.38 to 0.42 nm, and wherein the second zeolite has a mean pore size of 0.68 to 0.72 nm.
10. The process according to claim 1 , wherein the first zeolite and the second zeolite each independently comprise a neutral zeolite.
11. The process according to claim 2 , wherein the first zeolite and the second zeolite each independently comprise a neutral zeolite.
12. The process according to claim 3 , wherein the first zeolite and the second zeolite each independently comprise a neutral zeolite.
13. The process according to claim 7 , wherein the first zeolite and the second zeolite each independently comprise a neutral zeolite.
14. The process according to claim 1 , wherein the first zeolite and the second zeolite are present in a fixed bed.
15. The process according to claim 1 , wherein the process feedstream is contacted with the first zeolite and the second zeolite at a temperature of 50 to 200° C. and a pressure of 1 to 50 bar.
16. The process according to claim 2 , wherein the process feedstream is contacted with the first zeolite and the second zeolite at a temperature of 50 to 200° C. and a pressure of 1 to 50 bar.
17. The process according to claim 3 , wherein the process feedstream is contacted with the first zeolite and the second zeolite at a temperature of 50 to 200° C. and a pressure of 1 to 50 bar.
18. The process according to claim 7 , wherein the process feedstream is contacted with the first zeolite and the second zeolite at a temperature of 50 to 200° C. and a pressure of 1 to 50 bar.
19. A process comprising:
(a) providing a process feedstream comprising benzene; and
(b) bringing the process feedstream into contact with a fixed bed comprising a first neutral zeolite and a second neutral zeolite, at a temperature of 50 to 200° C. and a pressure of 1 to 50 bar;
wherein the first neutral zeolite has a mean pore size of 0.38 to 0.42 nm and is present in an amount of 30 to 70% by weight, and wherein the second neutral zeolite has a mean pore size of 0.68 to 0.72 nm and is present in an amount of 30 to 70% by weight, based on a combined total weight of the first neutral zeolite and the second neutral zeolite.
20. A process comprising:
(a) providing a feedstream comprising an aromatic component;
(b) bringing the feedstream into contact with a first zeolite and a second zeolite, wherein the first zeolite has a mean pore size of 0.3 to 0.5 nm, and wherein the second zeolite has a mean pore size of 0.6 to 0.8 nm, to form a pretreated feedstream; and
(c) reacting the pretreated feedstream with an olefin in the presence of a catalyst.