	US 11,833,468 B2
	Ammonia separation method and zeolite
Manabu Tanaka, Tokyo (JP); Takeshi Matsuo, Tokyo (JP); and Takayuki Aoshima, Tokyo (JP)
Assigned to Mitsubishi Chemical Corporation, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Jun. 2, 2022, as Appl. No. 17/830,375.
Application 17/830,375 is a continuation of application No. 17/153,961, filed on Jan. 21, 2021, granted, now 11,628,395.
Application 17/153,961 is a continuation of application No. 16/713,360, filed on Dec. 13, 2019, granted, now 10,946,333, issued on Mar. 16, 2021.
Application 16/713,360 is a continuation of application No. PCT/JP2018/023042, filed on Jun. 15, 2018.
Claims priority of application No. 2017-117862 (JP), filed on Jun. 15, 2017; application No. 2017-239295 (JP), filed on Dec. 14, 2017; application No. 2018-007414 (JP), filed on Jan. 19, 2018; application No. 2018-007415 (JP), filed on Jan. 19, 2018; and application No. 2018-007416 (JP), filed on Jan. 19, 2018.
Prior Publication US 2022/0288529 A1, Sep. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 53/22 (2006.01); B01D 69/02 (2006.01); B01D 69/10 (2006.01); B01D 71/02 (2006.01)

CPC B01D 53/228 (2013.01) [B01D 69/02 (2013.01); B01D 69/10 (2013.01); B01D 71/028 (2013.01); B01D 2257/406 (2013.01); B01D 2325/22 (2013.01)]

11 Claims

1. A method for separating ammonia from a mixed gas comprising ammonia gas, hydrogen gas, and nitrogen gas, the method comprising:

contacting the mixed gas with a zeolite membrane thereby allowing the ammonia gas to selectively permeate the zeolite membrane and separate from the mixed gas,

wherein a concentration of the ammonia gas in the mixed gas is 1.0% by volume or more relative to a total volume of the mixed gas, and

the zeolite membrane has an SiO₂/Al₂O₃molar ratio of from 6 to 500.