梳状改性聚醚的合成及对原油破乳性能的研究

Synthesis and Properties of Comb-like Modified Polyester as Crude Oil Demulsifier

樊 星 马政生 严军强 陈 静 高 艳

FAN Xing MA Zheng-Sheng YAN Jun-Qiang Chen-Jing GAO Yan

以聚醚L61和顺丁烯二酸酐（MA）为原料，对甲苯磺酸为催化剂，合成了顺丁烯二酸聚醚酯（Ester-L61），通过正交实验得到适宜的合成条件为：反应温度150℃、反应时间8 h、L61与MA质量比为1.5:1、催化剂加量1.8%。将合成的Ester-L61与烯丙基聚乙二醇（XPEG-1000）在自由基引发下通过溶液聚合得到具有亲水侧链的梳状结构的改性聚醚共聚物破乳剂（DEMU-L61），确定了最佳聚合条件是Ester-L61与XPEG-1000质量比为 1:0.9、引发剂过氧化苯甲酰（BPO）为总单体量的1%、反应温度120℃、反应时间5 h。采用红外光谱和核磁共振对最佳条件下合成产物的结构分析表明合成产物为目标产物。在最佳条件下得到的产物对延长油田东部区块的4种原油样有良好的破乳效果，破乳率均在99%左右，净化油的含水量均低于0.5%。

Maleic acid polyether ester(Ester-61) was synthesized from polyether glycol(L61) and maleic anhydride(MA) with p-toluenesulfonic acid as the catalyst. The reaction conditions were studied by orthogonal experiment. The results showed that the optimum reaction conditions were as follows, the mass ratio of L61 to MA was1.5:1, the content of p-toluenesulfonic acid was 1.8%, the reaction temperature was 150℃ and the reaction time was 8 h. A novel comb-like bicomper(DEMU-L61)with hydrophilic side chains was synthesized from Ester-61 and allyl polyethylene glycol(XPEG-1000) using benzoyl peroxide(BPO) as the initiator by free radical solution copolymerization when the mass ratio of Ester-L61 to XPEG-1000 was 1:0.9, the content of BPO was 1.0%, reaction temperature was 120℃ and reaction time was5 h. IR and NMR analysis showed the synthesized product was a target product. The DEMU-L61, obtained under the optimum conditions, had a good performance in the demulsification of crude oil from Yanchang oilfield Eastern district, the demulsification rate being about 99%, the purification oil content being less than 0.5% water.