Broad-spectrum high-efficiency defoaming agent for offshore oilfield and preparation method of broad-spectrum high-efficiency defoaming agent
A high-efficiency defoamer, a technology for offshore oil fields, applied in separation methods, chemical instruments and methods, foam dispersion/prevention, etc., to achieve the effects of enhanced defoaming effect, good spreadability and diffusivity, and low surface tension
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Embodiment 1
[0044]A broad-spectrum high-efficiency defoamer for offshore oilfields of the present invention is prepared from a mass fraction of 8wt% defoaming main agent, 0.5wt% defoaming auxiliary agent, 1wt% synergist and 90.5wt% dispersant; wherein, The main antifoaming agent is 40 parts by mass of mixed polydimethylsiloxane of different molecular weights, 5 parts by mass of epoxy polydimethylsiloxane, 10 parts by mass of polydimethylsiloxane Alcohol and 0.5 parts by mass of hydrogen-containing MQ silicone resin are used as raw materials, and 0.01 parts by mass of organic tin compound is used as a catalyst to react in 44.49 parts by mass of an organic solvent.
[0045] The mixed polydimethylsiloxane with different molecular weights is composed of 40wt% polydimethylsiloxane 1#, 40wt% polydimethylsiloxane 2#, and 20wt% polydimethylsiloxane 3# .
[0046] The preparation method of above-mentioned offshore oil field broad-spectrum high-efficiency defoamer comprises the following steps:
...
Embodiment 2
[0051] A broad-spectrum high-efficiency defoamer for offshore oilfields of the present invention is prepared from a mass fraction of 10wt% defoaming main agent, 1wt% defoaming auxiliary agent, 1.2wt% synergist and 87.8wt% dispersant; wherein, The main defoaming agent is 50 parts by mass of mixed polydimethylsiloxane of different molecular weights, 8 parts by mass of epoxy polydimethylsiloxane, 5 parts by mass of polydimethylsiloxane Alcohol and 2 parts by mass of hydrogen-containing MQ silicone resin are used as raw materials, and 0.05 parts by mass of organotin compound is used as a catalyst to react in 34.95 parts by mass of an organic solvent.
[0052] The mixed polydimethylsiloxane of different molecular weights is composed of 50wt% polydimethylsiloxane 1#, 30wt% polydimethylsiloxane 2#, and 20wt% polydimethylsiloxane 3# .
[0053] The preparation method of above-mentioned offshore oil field broad-spectrum high-efficiency defoamer comprises the following steps:
[0054] ...
Embodiment 3
[0058] A broad-spectrum high-efficiency defoamer for offshore oilfields of the present invention is prepared from a mass fraction of 9wt% defoaming main agent, 0.8wt% defoaming auxiliary agent, 2wt% synergist and 88.2wt% dispersant; wherein, The main defoaming agent is 48 parts by mass of mixed polydimethylsiloxane of different molecular weights, 6.5 parts by mass of epoxy polydimethylsiloxane, 8.5 parts by mass of polydimethylsiloxane Alcohol and 1 mass part of hydrogen-containing MQ silicone resin are used as raw materials, and 0.03 mass part of organotin compound is used as a catalyst to react in 35.97 mass parts of organic solvent.
[0059] The mixed polydimethylsiloxanes with different molecular weights are composed of 50wt% polydimethylsiloxane 1#, 40wt% polydimethylsiloxane 2#, and 10wt% polydimethylsiloxane 3# .
[0060] The preparation method of above-mentioned offshore oil field broad-spectrum high-efficiency defoamer comprises the following steps:
[0061] Step 1:...
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