Temperature-resistant type barium strontium sulfate anti-scaling agent for oil field and preparation method thereof
A technology of anti-scaling agent and barium sulfate, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., to achieve good anti-scaling effect
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Embodiment 1
[0027] The mass ratio of maleic anhydride, acrylic acid, methacrylic acid, 2-acrylamido-2-methylpropanesulfonic acid and ammonium persulfate is 30:50:5:14:1.
[0028] The preparation method comprises the following steps:
[0029] (1) Add maleic anhydride, ammonium persulfate and deionized water into a sealed constant temperature stirring device, heat and stir until they are completely dissolved.
[0030] (2) Raise the temperature to 90° C., add dropwise the mixture of acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, and functional monomer methacrylic acid at a rate of 20 mL / L.
[0031] (3) After the dropwise addition, the mixture was continuously stirred for 5 h at a temperature of 90° C., cooled and concentrated, and then the supernatant liquid was removed to obtain the obtained product.
[0032] The anti-scaling rate was tested according to the anti-scaling rate test method at 50° C., and the anti-scaling rate was 84%.
Embodiment 2
[0034] The mass ratio of maleic anhydride, acrylic acid, methacrylic acid, 2-acrylamido-2-methylpropanesulfonic acid and ammonium persulfate is 30:52.5:5:12.5:1.5.
[0035] The preparation method comprises the following steps:
[0036] (1) Add maleic anhydride, ammonium persulfate and deionized water into a sealed constant temperature stirring device, heat and stir until they are completely dissolved.
[0037] (2) Raise the temperature to 80° C., and add the mixture of acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid and functional monomer methacrylic acid dropwise at a rate of 50 mL / L.
[0038] (3) After the dropwise addition, the mixture was continuously stirred for 1 h at a temperature of 80° C., cooled and concentrated, and then the supernatant liquid was removed to obtain the obtained product.
[0039] The anti-scaling rate was tested according to the anti-scaling rate test method at 50° C., and the anti-scaling rate was 85%.
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