Defoamer for oil-gas separation
A defoamer, oil and gas technology, used in the preparation of defoamers for oil and gas separation in heavy oil oilfields, and in the field of crude oil defoamer, it can solve problems such as poor degassing effect, achieve rapid spreading and diffusion, and reduce foam interface strength. , the effect of continuous degassing effect
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example 1
[0040] Based on the synthesis of a high-efficiency crude oil-gas separation defoamer, the mass fraction is 7.19% of hydrogen-containing polydimethylsiloxane, 14.39% of allyl polyoxyethylene-polyoxypropylene ether, mass fraction of 25.61% organic solvent, 0.06% mass fraction of platinum catalyst, 1.92% mass fraction of low-molecular siloxane, 3.46% mass fraction of defoaming synergist, and 47.37% mass fraction of dispersant , the synthesis steps are as follows:
[0041] (1) First mix 56.2g of hydrogen-containing polydimethylsiloxane, 112.4g of allyl polyoxyethylene-polyoxypropylene ether, and 200g of xylene, blow in nitrogen for protection, and heat up to 100°C; add 0.5g 1% chloroplatinic acid-isopropanol solution, the temperature is controlled at 110°C, and the reaction is continued for 3 hours;
[0042] (2) Add 15 g of heptamethyltrisilane to the reaction product in step (1), control the temperature at 90° C., and continue the reaction for 1 hour;
[0043] (3) Add 17g tribu...
example 2
[0045] Based on the synthesis of a high-efficiency crude oil-gas separation defoamer, the mass fraction is 5% hydrogen-containing polydimethylsiloxane, 5% allyl polyoxyethylene-polyoxypropylene ether, mass fraction 30% organic solvent, 0.01% mass fraction of platinum catalyst, 1% mass fraction of low-molecular siloxane, 5% mass fraction of antifoam synergist, and 53.99% mass fraction of dispersant , the synthesis steps are as follows:
[0046] (1) First mix 50g of hydrogen-containing polydimethylsiloxane, 50g of allyl polyoxyethylene-polyoxypropylene ether, and 300g of toluene, blow in nitrogen for protection, and heat up to 120°C; add 0.1g of Pt- Divinyltetramethyldisiloxane complex, the temperature is controlled at 140°C, and the reaction is continued for 2 hours;
[0047] (2) Add 10 g of tetramethyldihydrodisiloxane to the reaction product in step (1), control the temperature at 100° C., and continue the reaction for 0.5 hours;
[0048] (3) Add 20 g of ethyl acetate, 30 g...
example 3
[0050]Based on the synthesis of a high-efficiency crude oil-gas separation defoamer, the mass fraction is 10% hydrogen-containing polydimethylsiloxane, 20% allyl polyoxyethylene-polyoxypropylene ether, mass fraction 20% organic solvent, 0.1% mass fraction of platinum catalyst, 5% mass fraction of low-molecular siloxane, 1% mass fraction of antifoam synergist, and 43.9% mass fraction of dispersant , the synthesis steps are as follows:
[0051] (1) First mix 100g of hydrogen-containing polydimethylsiloxane, 200g of allyl polyoxyethylene-polyoxypropylene ether, and 200g of ethylene glycol, blow in nitrogen for protection, and heat up to 110°C; then add 0.5g Pt-divinyltetramethyldisiloxane complex and 0.5 g of 1% chloroplatinic acid-isopropanol solution, temperature controlled at 125 ° C, and continued to react for 2.5 hours;
[0052] (2) Add 30.4 g of tetramethyldihydrodisiloxane and 19.6 g of heptamethyltrisilane to the reaction product in step (1), control the temperature at 1...
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