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:
Oct. 07, 2025
Filed:
Dec. 11, 2020
Zhejiang Nhu Company Ltd., Zhejiang, CN;
Zhejiang Nhu Special Materials Co., Ltd., Zhejiang, CN;
Zhirong Chen, Zhejiang, CN;
Wenbin Wu, Zhejiang, CN;
Guiyang Zhou, Zhejiang, CN;
Ming Feng, Zhejiang, CN;
Xingxing Shi, Zhejiang, CN;
Tao Ma, Zhejiang, CN;
Zhichao Feng, Zhejiang, CN;
Xiongwei Zhang, Zhejiang, CN;
Qing Sun, Zhejiang, CN;
Yong Xu, Zhejiang, CN;
ZHEJIANG NHU COMPANY LTD, Zheijiang, CN;
ZHEJIANG NHU SPECIAL MATERIALS CO., LTD., Zheijiang, CN;
Abstract
Provided are a method and device for preparing adiponitrile. The method of the present disclosure comprises the steps of a first hydrocyanation reaction, an isomerization reaction and a second hydrocyanation reaction, wherein online Raman spectroscopy is used for detecting the content of a specific component in the system; and the reaction conditions are regulated based on the detection results, so as to achieve precise control of the materials in each step of the reaction system. The method of the present disclosure can reduce an amount of butadiene, thereby reducing the subsequent energy consumption needed for recycling butadiene and equipment investment after reaction; by monitoring the content of hydrocyanic acid in real time, the residue of hydrocyanic acid is reduced to a lower level, and the operation safety and the stability of a catalyst during reaction are improved; and the loss of the catalyst is reduced.