Fluorescent marking polyether carboxylate environment-friendly corrosion/scale inhibitor
A corrosion and scale inhibitor, polyether carboxylate technology, applied in the direction of scale removal and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of rare raw materials, difficult development and application, difficult Achieve the effects of good compatibility, low production cost, simple and convenient operation
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example 1
[0019] Example 1: at N 2 Add 100g of allyl polyethylene glycol monoether to the protected reactor, add 120g of oxalic acid and 0.8g of p-toluenesulfonic acid and react at 75°C for 2.5h, adjust the reaction temperature to 85°C, and then add 80g maleic anhydride, 0.5g 8-allyloxy-1,3,6-pyrene trisulfonate sodium, 100g water, after mixing, add 10g sodium persulfate (dissolved in 50g water) dropwise, after the dropwise addition, continue After reacting at 80°C for 2 hours and cooling down to room temperature, a fluorescent-labeled polyether carboxylate-based environment-friendly corrosion and scale inhibitor (APEMYG) was prepared.
[0020] When the obtained APEMYG dosage is 8mg / L, the Ca 3 (PO 4 ) 2 Scale inhibition rate up to 99.6%, for CaCO 3 Scale inhibition rate is 92.5%, for CaSO 4 The scale inhibition rate is 97.5%, and the corrosion inhibition rate for carbon steel (conforming to the regulations of HG / T3523) can reach 93.7%.
example 2
[0021] Example 2: at N 2 Add 100g of allyl polyethylene glycol monoether, 70g of oxalic acid, 0.6g of thionyl chloride and 0.3g of N,N-dimethylformamide in the protected reactor for 3h at 60°C, and the reaction temperature After adjusting to 75°C, add 80g of acrylic acid, 4g of 8-allyloxy-1,3,6-pyrene trisulfonate sodium, 35g of water, mix well, add 10g of potassium persulfate (dissolved in 110g of water), drop After the addition, the temperature was raised to 90°C, and the reaction was continued for 5 hours. After cooling down to room temperature, a fluorescent-labeled polyether carboxylate environmentally friendly corrosion and scale inhibitor (APEMYG) was prepared.
[0022] When the obtained APEMYG dosage is 8mg / L, to Ca 3 (PO 4 ) 2 Scale inhibition rate up to 99.5%, for CaCO 3 Scale inhibition rate is 89.8%, for CaSO 4 The scale inhibition rate is 94.4%. , the corrosion inhibition rate of carbon steel (according to the regulations of HG / T3523) can reach 91.5%.
example 3
[0023] Example 3: at N 2 Add 120g of allyl polyethylene glycol monoether, 240g of glutaric acid and 1.5g of p-toluenesulfonic acid into the protected reactor, react at 100°C for 2 hours, adjust the reaction temperature to 70°C, and then add 50g of acrylic acid , 50g hydroxyethyl acrylate, 15g 8-allyloxy-1,3,6-pyrene trisulfonate sodium, 280g water, mix well and add dropwise 10g potassium persulfate (5g) and potassium persulfonate (5g) mixture (dissolved in 60g of water), after the dropwise addition, raise the temperature to 95°C, continue the reaction for 3 hours, and after cooling down to room temperature, a fluorescent-labeled polyether carboxylate-based environment-friendly corrosion and scale inhibitor (APEMYG) is prepared .
[0024] When the obtained APEMYG dosage is 8mg / L, to Ca 3 (PO4 ) 2 Scale inhibition rate up to 97.5%, for CaCO 3 Scale inhibition rate is 89.2%, for CaSO 4 The scale inhibition rate is 92.5%, and the corrosion inhibition rate for carbon steel (co...
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