Modified chabazite adsorbent compositions, methods of making and using them

Patent metadata

Field	Value
Publication number	US-9925514-B2
Application number	US-201615049610-A
Country	US
Kind code	B2
Filing date	Feb 22, 2016
Priority date	Feb 22, 2016
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

An adsorbent having a composition comprising at least 90% chabazite where the chabazite is a single phase chabazite having an Si/Al ratio of 1.2 to 1.8, the chabazite includes a mixture of at least two types of cations, and each of the at least two types of cations are in a molar ratio relative to Al of at least 0.05.

First claim

What is claimed is:

1. An adsorbent comprising:
a composition comprising at least 90% chabazite; wherein
the chabazite is a single phase chabazite having an Si/Al ratio of 1.2 to 1.8;
the chabazite includes a mixture of at least two types of cations; and
each of the at least two types of cations are in a molar ratio relative to Al of at least 0.12.

2. The adsorbent in accordance with claim 1 , wherein the at least two types of cations are selected from Li, Na, Ag, K, Ca, Mg, Zn, Cu, Ba, and Sr ions.

3. The adsorbent in accordance with claim 2 , wherein the mixture of the at least two types of cations comprise K and Na ions.

4. The adsorbent in accordance with claim 3 , wherein the K and Na cations are in a molar ratio of 0.14 to 1.25 K:Na.

5. The adsorbent in accordance with claim 3 , wherein the mixed cation chabazite is aK,NaCHA, wherein a represents the number of potassium cations, and a is from 2 to 7.

6. The adsorbent in accordance with claim 3 , wherein the mixed cation chabazite is K a Na (b-a) CHA, where b represents the total number of cations per unit of CHA and is from 12.9 to 16, and a represents the number of potassium cations and is from 2 to 7.

7. The adsorbent composition of claim 3 , wherein the mixed cation chabazite is; 2K,NaCHA; 3K,NaCHA; 4K,NaCHA; or 6K,NaCHA.

8. The adsorbent in accordance with claim 1 , wherein the chabazite has a Si/Al ratio from 1.35 to 1.6.

9. The adsorbent in accordance with claim 3 , wherein the chabazite is selected from 3K,NaCHA (1.6); 4K,NaCHA (1.6); 6K,NaCHA (1.6); and 2K,NaCHA (1.4).

10. The adsorbent in accordance with claim 4 , wherein the K and Na cations are in a molar ratio of 0.3 to 0.75 K:Na.

11. The adsorbent in accordance with claim 2 , wherein the mixture of the at least two types of cations comprise K and Li ions.

12. The adsorbent in accordance with claim 1 , wherein each of the at least two types of cations are in a molar ratio relative to Al of at least 0.18.

13. The adsorbent in accordance with claim 1 , wherein each of the at least two types of cations are in a molar ratio relative to Al of at least 0.24.

Assignees

• Air Prod & Chem

Inventors

• Coe Charles Gardner
• Bongo Christopher Robert
• Ochs Geoffrey John
• Bonanno Marissa Ann
• Lau Garret Chi-Ho
• Casteel Jr William Jack
• Zhao Qiao
• Whitley Roger Dean
• Sorensen Erin Marie

Classifications

• B01J20/04

  comprising compounds of alkali metals, alkaline earth metals or magnesium · CPC title

• B01J20/18 Primary

  Synthetic zeolitic molecular sieves · CPC title

• C01B39/46

  Other types characterised by their X-ray diffraction pattern and their defined composition {(C01B39/023, C01B39/026, C01B39/06 take precedence)} · CPC title

• B01J20/186

  Chemical treatments in view of modifying the properties of the sieve, e.g. increasing the stability or the activity, also decreasing the activity · CPC title

• B01D53/04

  with stationary adsorbents {(B01D53/025 takes precedence)} · CPC title