MPEG grafted alkylated carboxymethyl chitosan as a high-efficiency demulsifier for O/W crude oil emulsions. (1st August 2020)

• Record Type: Journal Article
• Authors: Lyu, Renliang; Xia, Ting; Liang, Cheng; Zhang, Cheng; Li, Zeqin; Wang, Lichun; Wang, Yi; Wu, Ming; Luo, Xiaogang; Ma, Jiayu; Wang, Cunwen; Xu, Caili
• Is Part Of: Carbohydrate polymers. Volume 241(2020)
• Publication Date: 2020-08-01
• Subjects: Chitosan (Pubchem CID: 129662530) -- sodium chloroacetate (Pubchem CID: 23665759) -- 1-bromobutane (Pubchem CID: 8002) -- 1-bromohexane (Pubchem CID: 8101) -- 1-bromooctane (Pubchem CID: 8140) -- potassium hydroxide (Pubchem CID: 14797) -- isopropanol (Pubchem CID: 3776) -- acetone (Pubchem CID: 180) -- succinic anhydride (Pubchem CID: 7922) -- triethylamine (Pubchem CID: 8471); Alkylated -- Carboxymethyl chitosan -- (ACMC) -- Methoxy polyethylene glycol -- (MPEG) -- Surface tension -- Demulsification efficiency; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2020.116309
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: A series of MPEG grafted alkylated carboxymethyl chitosan as demulsifiers are presented. The results show that the demulsifiers possess good performance to deal with O/W emulsion. Increasing of concentration leads to obvious improvement of demulsification efficiency when concentration is lower than CMC. Abstract: Three kinds of novel environmentally benign and high-efficiency crude oil demulsifiers were prepared using methoxy polyethylene glycol (MPEG) to modify alkylated carboxymethyl chitosan (ACMC). Structures of the demulsifiers were confirmed using FT-IR and 1 H NMR, and the relationship between surface tension and concentration was tested. Demulsification performance was investigated using the bottle test method with oil-in-water (O/W) emulsions that were prepared in lab conditions. The demulsification efficiency was as high as 79.1 %–84.9 %, and the possible mechanism of the demulsification process is discussed. Results show that MPEG-grafted ACMC (MPEG-ACMC) has a promising application as a demulsifier for dealing with emulsified O/W crude oil.