The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2023
Filed:
Sep. 21, 2020
China Petroleum & Chemical Corporation, Beijing, CN;
Sinopec Catalyst Co., Ltd., Beijing, CN;
Xiping Yin, Beijing, CN;
Ye Li, Beijing, CN;
Songyuan Gu, Beijing, CN;
Zhijian Liu, Beijing, CN;
Tao Wang, Beijing, CN;
Jin'ai Gao, Shandong, CN;
Yuhua Chen, Shandong, CN;
Yan Zhou, Shandong, CN;
Ling Yang, Shandong, CN;
Zhiwei Yuan, Beijing, CN;
Hongliang Yi, Beijing, CN;
Tao An, Shandong, CN;
Fuzu Liu, Shandong, CN;
Zhimin Zhang, Shandong, CN;
Shupeng Xu, Shandong, CN;
China Petroleum & Chemical Corporation, Beijing, CN;
Sinopec Catalyst Co., Ltd., Beijing, CN;
Abstract
Apparatus and methods are related to treating waste water containing ammonium salts, which contains NH, SO, Cl, and Na. In such a method, the pH value of the waste water to be treated is adjusted to a specific range in advance; sodium sulfate crystal and relatively concentrated ammonia are obtained by first evaporation, and then sodium chloride crystal and relatively dilute ammonia is obtained by second evaporation; alternatively, sodium chloride crystal and relatively concentrated ammonia is obtained by third evaporation, and then sodium sulfate crystal and relatively dilute ammonia are obtained by fourth evaporation. Ammonia, sodium sulfate, and sodium chloride from the waste water are recovered so that the resources in the waste water can be reused.