Method for preparing high purity ammonia
AssigneeHunan HiEND Products Co., Ltd.
InventorsJianren Bao, Lingqi Zeng, Zehua Zhu
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Abstract
A method for preparing high purity ammonia is provided, which comprises the following three steps of: (1) obtaining the required feed gases (i.e., hydrogen-nitrogen gas mixture) by catalytic cracking ammonia; (2) purifying the hydrogen-nitrogen gas mixture; and (3) synthesizing high purity ammonia by using the hydrogen- nitrogen gas mixture with high purity. In the provided method, the obtained ammonia with undesired purity is fed back to an ammonia catalytic cracking unit. The whole production system is a closed system without any discharging of ammonia and thus is environment friendly. Each step of the method can reduce cost.
Claims8
An integrated three-step method for preparing high purity ammonia, comprising:
- step one, catalytic cracking ammonia to obtain a hydrogen-nitrogen gas mixture;
- step two, purifying the hydrogen-nitrogen gas mixture;
- through cryogenic or adsorption purification and
- step three, synthesizing ammonia using the purified hydrogen-nitrogen gas mixture;
- wherein the method further comprises:
- outputting synthesized ammonia with desired purity, and
- recycling synthesized ammonia with a purity less than the desired purity back to the catalytic cracking step,
- the desired purity of the synthesized ammonia is in the range of 99.999% or higher.
Dependencies are inferred from the claim text.