KGM (konjac glucomannan) blended polymer oil displacement agent and preparation method thereof
A blended polymer and oil displacement agent technology, applied in the field of KGM blended polymer oil displacement agent, to achieve the effects of improving water solubility, enhancing rigidity, and increasing viscosity
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Embodiment 1
[0053] Embodiment 1: the preparation of NCE monomer
[0054] Add 3g of 2-pyridinecarboxylic acid, 6mL of thionyl chloride and 10mL of dichloromethane in sequence in the reaction flask, and heat up to 55°C for 2-6h after the addition. Cool to room temperature, spin distill the unreacted thionyl chloride to obtain 2-pyridinecarbonyl chloride as a light red solid product, with a yield of 98-99.5%; Dilute with methyl chloride, slowly add a mixed solution of 3.5g diallylamine and 10.9g triethylamine dropwise under ice bath, and stop the reaction at 25°C for 4-6h after dropping, the reaction solution is washed with water, washed with alkali, dried and filtered 1. Light brown liquid monomer NCE was obtained after vacuum distillation. The yield was 87.8%.
Embodiment 2
[0055] Embodiment 2: the preparation of NCT monomer
[0056] Add 3g of 3-pyridinecarboxylic acid and 6mL of thionyl chloride successively into the reaction flask, and after the addition, raise the temperature to 55°C for 2-6h. Cool to room temperature, spin distill unreacted thionyl chloride to obtain white solid product 3-pyridineformyl chloride with a yield of 98-99.5%; Dilute with methane, slowly add a mixed solution of 3.5g diallylamine and 10.9g triethylamine dropwise in an ice bath, and stop the reaction at 25°C for 4-6h after dropping, the reaction solution is washed with water, washed with alkali, dried, filtered, Dark yellow liquid monomer NCT was obtained after vacuum distillation with a yield of 88.2%.
Embodiment 3
[0057] Embodiment 3: the preparation of NCI monomer
[0058] Add 3g of 4-pyridinecarboxylic acid and 6mL of thionyl chloride successively into the reaction flask, and after the addition, raise the temperature to 55°C for 2-6h. Cool to room temperature, spin distill unreacted thionyl chloride to obtain white solid product 4-pyridinecarbonyl chloride, yield 98-99.5%; Dilute with methyl chloride, slowly add a mixed solution of 3.5g diallylamine and 10.9g triethylamine dropwise under ice bath, and stop the reaction at 25°C for 4-6h after dropping, the reaction solution is washed with water, washed with alkali, dried and filtered , Obtain dark red liquid monomer NCI after decompression distillation, yield is 89.6%.
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