公开(公告)号：US20240191080A1

公开(公告)日：2024-06-13

申请号：US18546986

申请日：2021-09-02

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Shufen ZHANG ,  Lei LI ,  Bingtao TANG ,  Rongwen LV ,  Wei MA ,  Suli WU ,  Wenbin NIU ,  Benzhi JU

IPC: C09B29/00 ,  B01J19/00 ,  B01J19/18

CPC classification number: C09B29/00 ,  B01J19/0066 ,  B01J19/1812 ,  B01J2219/00195

Abstract: A method for producing water-soluble azo dyes by utilizes continuous diazotization reaction and continuous coupling reaction in a pipeline reactor. The diazo component, hydrochloric acid and sodium nitrite are simultaneously fed at the bottom of the pipeline reactor at room temperature, to perform a diazotization reaction in the pipeline and leave the diazotization reaction site in time, followed by performing the coupling reaction with the introduced coupled component. Under stirring of micro stirring blades, the materials at each flow layer are uniformly mixed and reacted, and the reaction materials flow upward under the action of a feed driving force and are discharged from the top of the continuous reactor to produce a water-soluble azo dye.