支链聚醚原油破乳剂的合成与表征

Synthesis and characterization of branched polyether demulsifiers for crude oil

摘要:

以聚氧乙烯聚氧丙烯环氧基醚和聚氧乙烯聚氧丙烯甲基醚为支链，聚硅氧烷为主链，在异丙醇溶剂下，以氯铂酸为催化剂，通过硅氢加成反应，合成出聚醚聚硅氧烷类原油破乳剂。在n（环氧醚)︰n（甲基醚）=1︰1条件下，研究表明n（硅氢键)︰n（双键）=1︰1.15，反应温度105℃，反应时间5h，催化剂30ug/g和溶剂用量40%（占原料总质量）时，转化率达到92.62%，并通过FTIR和1H NMR对产物的分子结构进行了表征，谱图分析证明合成了预期产物。表面张力仪测定了其临界角束浓度为0.7g/L, 最低表面张力24.2 mN/m。该破乳剂在破乳温度70℃，用量为100mg/L条件下，对延长石油永平原油的脱水率达到88.42%，具有较好的破乳性能。

Abstract:

With polyoxyethylene polyoxypropylene epoxy ether and polyoxyethylene polyoxypropylene ether as the branched chains,polysiloxane as the based chain,under the isopropyl alcohol solvent,using chloroplatinic acid as the catalyst,through silicon hydrogen addition reaction, synthesized the polyether polysiloxane crude oil demulsifier.Fixed n (epoxy ether) : n (methyl ether) = 1:1, the research shows that n (Si—H) : n (C=C) = 1:1.15, temperature 105 ℃, the reaction time of 5 h, 30 ug/g catalyst and solvent dosage 40% overall (raw material), the conversion rate reached 92.62%, and by FTIR and 1H NMR had been used to characterize the structure of the product, spectra analysis shows that expected product was synthesized. Its critical Angle beam is determined by the surface tensiometer 0.7 g/L, minimum surface tension of 24.2 mN/m. The Demulsifier in demulsification temperature 70 ℃, the amount of 100mg/L, to Yanchang Yongping crude oil dehydration rate reached 88.42%, has good demulsification performance.