An electrolytic system and electrochemical dyeing process for indirect electrochemical dyeing
An electrochemical and indirect technology, applied in dyeing method, electrolytic organic material coating, textile and paper making, etc., can solve the problems of long time for dye reduction, low conduction current, poor dyeing effect, etc., and shorten the reduction time , high conduction current, and accelerated mass transfer rate
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Embodiment 1
[0030] The present embodiment provides a kind of electrochemical dyeing process, comprises the following steps:
[0031] Step a, in 0.2mol / L sodium hydroxide aqueous solution, add successively to 0.02mol / L ferrous sulfate, 0.04mol / L sodium gluconate, 0.005mol / L aluminum sulfate, 0.0095mol / L indigo and fully stir to obtain the cathode Electrolyte; the anolyte is 2mol / L sodium hydroxide aqueous solution; the aluminum electrode is used as the cathode, and the graphite electrode is used as the anode;
[0032] Step b. Add the cathode and anode electrolytes into the electrolytic cell respectively, carry out electrochemical reduction of indigo for 60 minutes under the conditions of electrolysis voltage of 15V and nitrogen protection, and put the reduction potentiometer into the dyeing solution at 25°C after the reduction is completed , after the value is stable, read the reduction potential value;
[0033] Step c, put the reduced dye solution obtained in step b into the pure white s...
Embodiment 2
[0035] The present embodiment provides a kind of electrochemical dyeing process, comprises the following steps:
[0036] Step a, in 0.15mol / L sodium hydroxide aqueous solution, add successively to 0.01mol / L ferric sulfate, 0.04mol / L sodium oxalate, 0.0025mol / L aluminum sulfate, 0.005mol / L indigo and fully stir to obtain catholyte ; The anolyte is 1mol / L sulfuric acid aqueous solution; the aluminum electrode is used as the cathode, and the copper electrode is used as the anode;
[0037] Step b. Add the cathode and anode electrolytes to the electrolytic cell respectively, and perform electrochemical reduction of indigo for 100 minutes under the condition of electrolysis voltage of 10V and nitrogen protection. After the reduction, put the reduction potentiometer into the dye solution at 25°C , after the value is stable, read the reduction potential value;
[0038] Step c, put the reduced dye solution obtained in step b into the pure white semi-bleached denim cloth moistened with...
Embodiment 3
[0040] The present embodiment provides a kind of electrochemical dyeing process, comprises the following steps:
[0041] Step a, in 0.3mol / L sodium hydroxide aqueous solution, add successively to 0.01mol / L ferrous chloride, 0.03mol / L sodium citrate, 0.0075mol / L aluminum chloride, 0.0095mol / L indigo and fully stir The catholyte is obtained; the anolyte is a 2mol / L sodium metabisulfite aqueous solution; the aluminum electrode is used as the cathode, and the aluminum electrode is used as the anode;
[0042] Step b. Add the cathode and anode electrolytes into the electrolytic cell respectively, and perform electrochemical reduction of indigo for 130 minutes under the condition of electrolysis voltage of 8V and nitrogen protection. After the reduction, put the reduction potentiometer into the dyeing solution at 25°C , after the value is stable, read the reduction potential value;
[0043] Step c, put the reduced dye solution obtained in step b into the pure white semi-bleached den...
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