Preparation method of phosphorus-free reverse osmosis scale inhibitor
A scale inhibitor and reverse osmosis technology, applied in the field of preparation of phosphorus-free reverse osmosis scale inhibitor, can solve the problems of single function, low scale inhibition performance, uneven product performance, etc., to improve the ability, not easy to deposit, The effect of preventing fouling on the membrane surface
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Embodiment 1
[0025] The preparation method of phosphorus-free reverse osmosis scale inhibitor comprises the following steps:
[0026] S1, take a certain amount of maleic anhydride and put it into a 250mL four-necked flask equipped with a thermometer, a stirrer, and a condenser;
[0027] S2. Add a certain amount of ammonia water in proportion to start the stirrer, wherein maleic anhydride is 30%, ammonia water is 70%, and cooling water is passed at the same time, the reaction begins to emit a large amount of heat, and when the temperature is about 60 ° C, a milky white turbid liquid is obtained. Continue Stir evenly for a period of time, the suspended matter is completely dissolved, and becomes a clear and slightly yellow homogeneous solution. After adding ammonia water, the temperature rises to 90°C, then cools down to 70°C, then keeps it for 1 hour, and then raises the temperature to 90°C , at this time, the condenser tube is removed to evaporate the water molecules and excess ammonia mol...
Embodiment 2
[0033] The preparation method of phosphorus-free reverse osmosis scale inhibitor comprises the following steps:
[0034] S1, take a certain amount of maleic anhydride and put it into a 250mL four-necked flask equipped with a thermometer, a stirrer, and a condenser;
[0035] S2. Add a certain amount of ammonia water in proportion to start the stirrer, wherein maleic anhydride is 30%, ammonia water is 70%, and cooling water is passed at the same time, the reaction begins to emit a large amount of heat, and when the temperature is about 60°C, a milky white turbid liquid is obtained. Continue Stir evenly for a period of time, the suspended matter is completely dissolved, and becomes a clear and slightly yellow homogeneous solution. After adding ammonia water, the temperature rises to 90°C, then cools down to 65°C and keeps it for 1 hour, then raises the temperature to 90°C , at this time, the condenser tube is removed to evaporate the water molecules and excess ammonia molecules; ...
Embodiment 3
[0041] The preparation method of phosphorus-free reverse osmosis scale inhibitor comprises the following steps:
[0042] S1, take a certain amount of maleic anhydride and put it into a 250mL four-necked flask equipped with a thermometer, a stirrer, and a condenser;
[0043] S2. Add a certain amount of ammonia water in proportion to start the stirrer, wherein maleic anhydride is 30%, ammonia water is 70%, and cooling water is passed at the same time, the reaction begins to emit a large amount of heat, and when the temperature is about 60°C, a milky white turbid liquid is obtained. Continue Stir evenly for a period of time, the suspended matter is completely dissolved, and becomes a clear and slightly yellow homogeneous solution. After adding ammonia water, the temperature rises to 90°C, then cools down to 70°C, then keeps it for 1 hour, and then raises the temperature to 90°C , at this time, the condenser tube is removed to evaporate the water molecules and excess ammonia molec...
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