自由基溶液聚合制备阳离子聚丙烯酸酯油包油乳液破乳剂,Journal of Applied Polymer Science

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自由基溶液聚合制备阳离子聚丙烯酸酯油包油乳液破乳剂
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2023-01-04 , DOI: 10.1002/app.53590
Sisi Yuan ₁ , Yongjun Wang ₂ , Xiujun Wang _{3,

4} , Donghua Liao ₁ , Ming Duan ₁ , Shenwen Fang ₁

Affiliation

环氧乙烷和环氧丙烷在高温高压下开环聚合制备的嵌段聚醚破乳剂是目前应用最广泛的原油包水乳状液破乳剂。具有较高的合成风险和成本。因此，开发非嵌段聚醚破乳剂越来越受到人们的关注。本文采用丙烯酸酯与阳离子单体的自由基聚合反应合成了一种新型破乳剂。结果发现，在二丙二醇甲醚和水的混合溶剂中合成的丙烯酸甲酯（MA）与苄基二甲基[2-[（1-氧代烯丙基）氧基]乙基]氯化铵（DBC）的共聚物PMA-co-PDBC具有一个好的表现。当PMA-co-PDBC的用量为200 mg/L时，含水量为50%的原油包水乳液在80℃条件下4 h脱水率可达80%。结构和界面性质分析表明，PMA-co-PDBC具有类似于嵌段聚醚的微嵌段结构，可有效降低W/O界面膜的强度，实现破乳。虽然PMA-co-PDBC的破乳性能不如嵌段聚醚，但其制备安全性和成本要好得多。该研究成果可为原油破乳剂的开发提供新的选择。虽然PMA-co-PDBC的破乳性能不如嵌段聚醚，但其制备安全性和成本要好得多。该研究成果可为原油破乳剂的开发提供新的选择。虽然PMA-co-PDBC的破乳性能不如嵌段聚醚，但其制备安全性和成本要好得多。该研究成果可为原油破乳剂的开发提供新的选择。

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Preparation of cationic polyacrylate W/O crude oil emulsion demulsifier by free-radical solution polymerization

The block polyether demulsifier prepared by ring-opening polymerization of ethylene oxide and propylene oxide under high temperature and high pressure is the most widely used demulsifier for water in crude oil emulsion. It has the high synthesis risk and cost. Therefore, the development of non-block polyether demulsifier has attracted more and more attention. In this article, a new type of demulsifier was sythesized by radical polymerization of acrylate and cationic monomer. It was found that the copolymer PMA-co-PDBC of methyl acrylate (MA) and benzyldimethyl [2-[(1-oxoallyl)oxy] ethyl] ammonium chloride (DBC) synthesized in the mixed solvent of dipropylene glycol methyl ether and water had a good performance. When dosage of PMA-co-PDBC was 200 mg/L, the dehydration rate of water in crude oil emulsion with 50% water content can reach 80% at 80°C within 4 h. Structural and interface properties analysis presented that PMA-co-PDBC had a microblock structure similar with block polyether and it can effectively reduce the strength of W/O interfacial film to realize the demulsification. Although the demulsification performance of PMA-co-PDBC was not better than block polyether, its preparation safety and cost are much better. The results of this article can provide a new option for the development of crude oil demulsifier.

更新日期：2023-01-04

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