Preparation method and application of block polyether-beta-CD comb type demulsifying agent
A technology of block polyether and demulsifier, which is applied in the direction of chemical dehydration/demulsification, etc., to achieve the effect of easy industrial production, simple equipment and simple preparation method
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example 1
[0022] Take 5.7mmol of β-cyclodextrin and put it into a three-necked flask with a constant pressure titration funnel and a stirring paddle, then add 30ml DMSO, 2.0gNaOH, stir well for 1h to completely dissolve the cyclodextrin, and then slowly Add 8 ml of allyl bromide dropwise, and continue the constant temperature reaction for 48 hours. After the reaction, vacuum filter and wash with acetone to obtain a white powder, and obtain allyl-β-cyclodextrin.
[0023] Then use allyl-β-cyclodextrin and acrylic acid as raw materials, according to the raw material molar ratio of 1:2, in the aqueous solution at 60°C, add a mixed system of sodium bisulfite and ammonium persulfate with a mass ratio of 1:1 as an initiator , constant temperature polymerization reaction for 8 hours, after the reaction, the precipitate was washed with absolute ethanol, dried and pulverized to obtain an allyl-β-cyclodextrin / acrylic acid main chain polymer.
[0024] Finally, weigh 15g of the above-mentioned main ...
example 2
[0026] Take 5.7mmol of β-cyclodextrin in a three-neck flask with a constant pressure titration funnel and a stirring paddle, then add 30ml DMSO, 2.0gNaOH, stir well for 1h to completely dissolve the cyclodextrin, and then slowly Add 8 ml of allyl bromide dropwise, and continue the constant temperature reaction for 48 hours. After the reaction, vacuum filter and wash with acetone to obtain a white powder, and obtain allyl-β-cyclodextrin.
[0027] Then use allyl-β-cyclodextrin and acrylic acid as raw materials, according to the molar ratio of raw materials of 1:1, in the aqueous solution at 60 ° C, add a mixed system of sodium bisulfite and ammonium persulfate with a mass ratio of 1:1 as an initiator , constant temperature polymerization reaction for 8 hours, after the reaction, the precipitate was washed with absolute ethanol, dried and pulverized to obtain an allyl-β-cyclodextrin / acrylic acid main chain polymer.
[0028] Finally, weigh 15g of the above-mentioned main chain pol...
example 3
[0030] Take 5.7mmol of β-cyclodextrin in a three-neck flask with a constant pressure titration funnel and a stirring paddle, then add 30ml DMSO, 2.0gNaOH, stir well for 1h to completely dissolve the cyclodextrin, and then slowly Add 8 ml of allyl bromide dropwise, and continue the constant temperature reaction for 48 hours. After the reaction, vacuum filter and wash with acetone to obtain a white powder, and obtain allyl-β-cyclodextrin.
[0031] Then use allyl-β-cyclodextrin and acrylic acid as raw materials, according to the molar ratio of raw materials 1:0.5, in the aqueous solution at 60°C, add a mixed system of sodium bisulfite and ammonium persulfate with a mass ratio of 1:1 as an initiator , constant temperature polymerization reaction for 8 hours, after the reaction, the precipitate was washed with absolute ethanol, dried and pulverized to obtain an allyl-β-cyclodextrin / acrylic acid main chain polymer.
[0032] Finally, weigh 15g of the above-mentioned main chain polyme...
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