Journal
CARBOHYDRATE POLYMERS
Volume 241, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.116309
Keywords
Alkylated; Carboxymethyl chitosan; (ACMC); Methoxy polyethylene glycol; (MPEG); Surface tension; Demulsification efficiency
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Funding
- National Natural Science Foundation of China [51304147]
- Key Laboratory of Green Chemical Process of Ministry of Education in Wuhan Institute of Technology [201715]
- Scientific Research Foundation of Wuhan Institute of Technology [K201434]
- Fundamental Research Funds for the Central Universities of South-Central University for Nationalities [CZQ19016]
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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 H-1 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.
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