A method for continuously preparing azo dye in micro-reactors
A micro-reactor, azo dye technology, applied in the direction of azo dyes, monoazo dyes, chemical instruments and methods, etc., can solve the problem that the diazotization reaction temperature is difficult to control, the yield of diazonium salts is not high, and the reaction cycle To avoid decomposition and other side reactions, shorten the residence time, and shorten the reaction period
Active Publication Date: 2017-12-19
深圳智微通科技有限公司
11 Cites 17 Cited by
AI-Extracted Technical Summary
Problems solved by technology
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreAbstract
The invention discloses a method for continuously preparing azo dye in micro-reactors in the field of dye synthesis. The azo dye is prepared by firstly subjecting a sodium nitrite solution, an aromatic primary amine and an inorganic acid to a diazotization reaction at room temperature in a first micro-reactor to generate an aromatic primary amine diazonium salt; and then subjecting the aromatic primary amine diazonium salt and a coupling component to a coupling reaction in a second micro-reactor to generate the azo dye. Continuous preparation of the azo dye is achieved by utilizing the micro-reactors, a process is simple, a reaction period is short, and a reaction process can be easily monitored and controlled. Addition of an excessive amount of the sodium nitrite and the coupling agent to increase the reaction speed is not required so that raw materials are saved and the method is environmentally friendly. Reaction liquid in the micro-reactors achieves high-speed collision mixing, a uniform reaction environment is formed immediately, the reaction efficiency is high, and the yield and quality of a reaction product are greatly improved.
Application Domain
Technology Topic
Image
Examples
- Experimental program(11)
Example Embodiment
Example Embodiment
Example Embodiment
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more PUM


Description & Claims & Application Information
We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more Similar technology patents
Preparation method for aromatic nitrile compound
InactiveCN103664433AImprove reaction efficiencyLower reaction costCarbamic acid derivatives preparationCarboxylic acid nitrile preparationIonPalladium
Owner:PEKING UNIV
Kieselguhr-based ferric carbon ceramsite packing and preparation method thereof
InactiveCN105967284AImprove reaction efficiencyEasy to operateWater/sewage treatmentStarch solutionAmmonium sulfate
Owner:SHAANXI UNIV OF SCI & TECH
Preparation method of doxylamine succinate
ActiveCN103524403AImprove reaction efficiencyHigh yieldCarboxylic acid salt preparationSodium amideMagnesium
Owner:JIANGSU LEEWAY BIOLOGICAL TECH
Technology for preparing vitamin D3
InactiveCN102850248ANo pollution in the processImprove reaction efficiencyOrganic chemistrySolventToxicity
Owner:ZHEJIANG GARDEN BIOCHEM HIGH TECH
Solid-liquid reaction device with grinding function
InactiveCN109092229AImprove reaction efficiencyPrevent materials from stickingChemical/physical/physico-chemical stationary reactorsDrive motorRaw material
Owner:伍超群
Classification and recommendation of technical efficacy words
- Short stay
- Improve reaction efficiency
High-strength cast Mg alloy containing rare-earth and preparing process thereof
Owner:SHANGHAI JIAO TONG UNIV
Advanced biorefinery process
Owner:RA ENERGY CORP
Train unmanned turning-back method based on CBTC (communication based train control) system
Owner:TRAFFIC CONTROL TECH CO LTD
Subsurface flow wetland device for enhanced nitrogen removal of low-pollution water
InactiveCN103739081AImprove removal performanceShort stayTreatment with aerobic and anaerobic processesSustainable biological treatmentPollutantEnvironmental Engineering technology
Owner:SHANGHAI JIAO TONG UNIV
Printing and dyeing wastewater autotrophic denitrification denitriding device and method
ActiveCN105621608AFast startupShort stayTreatment with anaerobic digestion processesWaste water treatment from textile industryPyriteElectron donor
Owner:UNIV OF SCI & TECH BEIJING +2