Synthesis of a novel copolymer of block polyether macromonomer and diallyldimethylammonium chloride and its reverse demulsification performance

Duan, Ming; He, Jie; Li, DongJu; Wang, Xiujun; Jing, Bo; Xiong, Yan; Fang, Shenwen

doi:10.1016/j.petrol.2018.12.059

Cited by 31 publications

(14 citation statements)

References 12 publications

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“…Recently, polyether demulsifier is the most commonly used and widely used crude oil demulsifier [33,34] . Polyether‐type demulsifiers have superior operability, and can synthesize demulsifiers with different HLB values by changing the ratio of ethylene oxide (EO) to propylene oxide (PO) [35] . Compared with linear demulsifiers, multi‐branched demulsifiers have better diffusion and wetting ability, and the demulsifier molecules quickly enter the oil‐water interface [36] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Research of Highly Efficient Polyether Demulsifier

2022

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Separation of oil and water has always been a top priority in the oil industry. In this study, bisphenol A phenolamine resin (BPA) was synthesized from bisphenol A, diethylenetriamine and formaldehyde. With KOH as a catalyst, the initiator, ethylene oxide (EO) and propylene oxide (PO) were polycondensed into triblock polyethers with different molecular weights, and then crosslinked to increase the molecular weight. The target product was determined by 1 HNMR and FT-IR, and the synthesis process of triblock polyether demulsifier was optimized by changing the ratio of initiator to head PO, PO to EO and head PO to tail PO. Then, the important influential factors for the demulsification such as the demulsifier concentration, standing time, temperature, pH and Hydrophile-lip-ophile balance (HLB) values were investigated. The results suggestted that the optimal synthesis ratio of BPA type triblock polyether demulsifier was as follows: initiator/PO = 1 : 109, PO/ EO = 2 : 1, head PO/ tail PO = 1 : 3. Under demulsification conditions, the dehydration temperature was 50 °C, the dosage was 75 mg ⋅ L À 1 , pH was 7.6 and HLB was 9.1, and the dehydration rate reached 92.5 % in 90 minutes. Compared with the existing demulsifier, the demulsifier has a lower demulsification temperature and higher demulsification efficiency. Therefore, it can be concluded that the polyether demulsifier has potential application for the crude oil dehydration, and the current work may be helpful to explore the demulsification development.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Research of Highly Efficient Polyether Demulsifier

2022

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“…13,14 During the produced liquid treatment process, the reverse demulsifier is added to the three-phase separator to promote the O/W emulsion separation. 15,16 A favorable reverse demulsifier can relieve the load of treatment equipment and is helpful for the treated wastewater to meet the reinjection standard easily. Up to now, there are three main types of reverse demulsifiers.…”

Section: Introductionmentioning

confidence: 99%

“…[21][22][23] (2) Nonionic block polyether, the block copolymer of ethylene oxide (EO) and propylene oxide (PO). 16,21,[24][25][26] Usually, the block polyether should be designed and screened according to the properties of different types of produced liquids. It can efficiently reduce the oil-water interfacial film strength, which is beneficial to the oil droplets coalescence and the emulsion demulsification.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a novel reverse demulsifier with the characteristics of polyacrylate and polycation and its demulsification performance

Wang

Fang

Wang

et al. 2021

J of Applied Polymer Sci

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As the development of oilfield exploitation, more and more oil in water (O/W) emulsion was produced, thus efficient reverse demulsifier becomes increasingly important. In this paper, a series of novel reverse demulsifiers (R‐PED1 ~ 4) with the characteristics of polyacrylate and polycation were prepared. The structure of the product was verified by IR specter and 1H NMR. The thermal stability was studied with TGA and the molecular weight was obtained by GPC. Field evaluation results showed that the oil content in produced liquid after R‐PED4 treatment can be reduced from 1550 to 81 mg/L at R‐PED4 dosage was 50 mg/L. Furthermore, the demulsification mechanism of R‐PED was discussed. The R‐PED has good surface/interfacial activity. It can effectively reduce the oil–water interfacial film strength and reduce the zeta potential of oil droplets, which is beneficial for the coalescence of oil droplets. Especially, the interaction force between oil droplets was measured by the optical tweezers. R‐PED4 can increase the attraction force between oil droplets. Consequently, the contact time of oil droplets during the demulsification process can be prolonged and the coalescence of oil droplets also can be effectively promoted. The novel reverse demulsifier offers a new option for the oilfield produced liquid treatment.

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“…[23][24][25][26][27][28][29][30][31] During the preparation of DMDAAC-based homopolymer and copolymer, the solution polymerization, inverse emulsion polymerization, and dispersion polymerization are the common methods. In our previous work, 32 copolymer of DMDAAC and a nonionic block polyether macromonomer (PEP-65) was prepared as a novel reverse demulsifier, which has both advantages of cationic reverse demulsifier and nonionic reverse demulsifier and has very well reverse demulsification performance. It was synthesized in mixture solution of water and propylene glycol methyl ether (PGME) and we found that its polymerization phenomenon was very special, which cannot be described by any reported polymerization method.…”

Section: Introductionmentioning

confidence: 99%

Copolymerization behavior of diallyldimethylammonium chloride‐nonionic macromonomer in water‐ether mixture solution and flotation performance of the copolymer for treating oily wastewater

Duan

Wang

et al. 2021

J of Applied Polymer Sci

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Copolymerization of cationic monomer and nonionic macromonomer in water-ether mixture solution is useful for preparing the functional polymer. Copolymer of diallyldimethylammonium chloride (DMDAAC) and a nonionic block polyether macromonomer (PEP-65) has been found that has very well reverse demulsification performance, but the polymerization phenomenon cannot be described by any reported polymerization method. In this paper, the copolymerization behavior including polymer mechanism, polymerization kinetics, and reactivity rate of DMDAAC and PEP-65 in the mixture solution of water and propylene glycol methyl ether (PGME) was studied for explaining the special copolymerization phenomenon and its flotation performance for treating oily wastewater was also investigated. The results showed that DMDAAC-PEP-65 copolymerization in water-PGME mixture solution has four stages and has both characteristics of emulsion polymerization and dispersion polymerization. In addition, the copolymer also has excellent flotation performance.

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Synthesis of a novel copolymer of block polyether macromonomer and diallyldimethylammonium chloride and its reverse demulsification performance

Cited by 31 publications

References 12 publications

Synthesis and Research of Highly Efficient Polyether Demulsifier

Synthesis and Research of Highly Efficient Polyether Demulsifier

Synthesis of a novel reverse demulsifier with the characteristics of polyacrylate and polycation and its demulsification performance

Copolymerization behavior of diallyldimethylammonium chloride‐nonionic macromonomer in water‐ether mixture solution and flotation performance of the copolymer for treating oily wastewater

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