A kind of synthetic method of dithiocarbamate type water purifying agent
A dithioamino, formate-type technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of ineffective reduction of sewage pollution and large dosage , the problem of high cost
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Embodiment 1
[0015] In the four-neck flask with thermometer, stirrer, water separator and reflux condenser, add terephthalic acid and triethylenetetramine, its mol ratio is 1:0.5, and add 50g dimethylbenzene and do water-carrying agent, The temperature was raised to 140°C and kept under reflux for 3 hours to obtain an orange viscous liquid. Distill under reduced pressure for 2 hours to remove the water-carrying agent and unreacted organic amine, and cool down to 50°C to obtain the amide. Dissolve it in 50g of ethanol-water solvent with a mass ratio of 1:1, add epichlorohydrin liquid dropwise with a separatory funnel, wherein the molar ratio of triethylenetetramine to epichlorohydrin is 1:0.5, and control the rate of addition , make the reaction temperature less than 55°C, react for 6 hours, the solution is colorless and transparent, cool down to 5°C, slowly add carbon disulfide dropwise, wherein the molar ratio of triethylenetetramine to carbon disulfide is 1:2.4, and use 50% sodium hydrox...
Embodiment 2
[0025] In the four-neck flask with thermometer, stirrer, water separator and reflux condenser, add terephthalic acid and pentaethylene hexamine, its mol ratio is 1:0.8, and add 50g dimethylbenzene to make water-carrying agent, The temperature was raised to 140°C and kept under reflux for 3 hours to obtain an orange viscous liquid. Distill under reduced pressure for 2 hours to remove the water-carrying agent and unreacted organic amine, and cool down to 50°C to obtain the amide. Dissolve it in 50g of ethanol-water solvent with a mass ratio of 1:1, add the epichlorohydrin liquid dropwise with a separatory funnel, wherein the molar ratio of pentaethylenehexamine to epichlorohydrin is 1:0.2, and control the rate of addition , make the reaction temperature less than 55°C, react for 6 hours, the solution is colorless and transparent, cool down to 5°C, slowly add carbon disulfide dropwise, wherein the molar ratio of pentaethylenehexamine to carbon disulfide is 1:4, and use 50% sodium...
Embodiment 3
[0028] In the four-neck flask with thermometer, stirrer, water trap and reflux condenser, add adipic acid and triethylenetetramine, its mol ratio is 1:0.5, and add 50g toluene to make water-carrying agent, temperature rises To 160°C, keep reflux for 3 hours to obtain orange viscous liquid. Distill under reduced pressure for 2 hours to remove the water-carrying agent and unreacted organic amine, and cool down to 50°C to obtain the amide. Dissolve it in 50g of methanol-water solvent with a mass ratio of 1:1, add the epichlorohydrin liquid dropwise with a separatory funnel, wherein the molar ratio of triethylenetetramine to epichlorohydrin is 1:0.5, and the reaction is severely released. Heat to make the reaction temperature less than 55°C, react for 4 hours, the solution is colorless and transparent, cool down to 5°C, slowly add carbon disulfide dropwise, wherein the molar ratio of triethylenetetramine to carbon disulfide is 1:2.4, and use 50% potassium hydroxide Adjust the pH ...
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