Synthesis of a novel cationic asphalt emulsifier and its investigation by online FTIR spectrophotometry

Four novel environmentally friendly and highly branched crude oil demulsifiers were prepared by using different molecular weight (Mn = 350, 750, 1000, 1900 g/mol) of methoxy poly(ethylene glycol) to modify quaternized N,O‐carboxymethyl chitosan. Fourier transform infrared and 1H‐nuclear magnetic resonance were employed to confirm the structure of the demulsifiers. The surface tension of demulsifies was determined and hydrophile–lipophile balance value was calculated at the critical micelle concentration. The demulsification performance was evaluated by the bottle test method against water‐in‐oil emulsions simulated in the laboratory and it was found that the dehydration rate of four demulsifiers can come to 74.2%–80.4%, which have better demulsification performance than the commercial demulsifier JL‐1. Demulsification mechanism was discussed, and it was encouraging to find that the tiny water droplets in the emulsion coalesced to form the water phase and separated with the water from the polarization microscope. Results show that methoxy poly(ethylene glycol) grafted quaternized carboxymethyl chitosan has a promising application as a demulsifiers for dealing with W/O crude oil emulsions. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45867.

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“…The peak at 1097 cm −1 was assigned to CN stretching vibration. The characteristic peak at 896 cm −1 was attributed to the epoxy group …”

Section: Resultsmentioning

confidence: 99%

MPEG grafted quaternized carboxymethyl chitosan for demulsification of crude oil emulsions

Fan

Lyu

Gao

et al. 2017

J of Applied Polymer Sci

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“…In previous papers, we have synthesized different kinds of asphalt emulsifiers [10][11][12][13][14]. Three novel biscationic asphalt emulsifiers were synthesized by two steps reaction in this paper.…”

Section: Introductionmentioning

confidence: 99%

The Synthesis and Characterization of Novel Bis-cationic Asphalt Emulsifier

Shi

et al. 2017

MATEC Web Conf.

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Abstract. Three novel bis-cationic asphalt emulsifiers were synthesized by two steps reaction of N-tallow-1,3-diaminopropane, methyl acrylate, sodium hydroxide and chloroacetic acid. The structure of the product was confirmed by FTIR, 1 H NMR and elemental analysis. The emulsifier exhibits satisfactory emulsification. The prepared bituminous emulsion showed higher storage stability. The emulsifier belongs to medium-set and slow-set asphalt emulsifier. It can be designed to perform in a wide variety of applications including tack coat, fog seal, chip seal and slurry seal in asphalt pavement construction.

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“…In previous papers, different kinds of asphalt emulsifiers were synthesized by our research group [12,19,20,21]. A symmetrical Gemini cationic asphalt emulsifier was synthesized by two steps reaction of coconut oil acyl propyl dimethyl tertiary amine (PKO), epoxy chloropropane and hydrochloric acid in this paper.…”

Section: Introductionmentioning

confidence: 99%

The Synthesis and Characterization of a Novel Gemini Cationic Asphalt Emulsifier

Ma¹,

Shi²,

Yu³

et al. 2017

Proceedings of the 2017 5th International Conference on Machinery, Materials and Computing Technology (ICMMCT 2017)

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Abstract.A symmetrical Gemini cationic asphalt emulsifier of 1,3-bis(3'-coconut oil amide propyl-dimethyl ammonium chloride)-2-hydroxy propane was synthesized by two steps reaction of coconut oil acyl propyl dimethyl tertiary amine (PKO), epoxy chloropropane and hydrochloric acid. The structure of the product was confirmed by FTIR, 1 H NMR and elemental analysis. The optimum reaction condition was obtained by single factor analysis: reaction time 6h, reaction temperature 80℃, feedstock mole ratio of epoxy chloropropane to PKO 0.5. The reaction yield was 54.01% at the optimum reaction conditions. The critical micelle concentration (CMC) of the asphalt emulsifier is 3.65×10 -2 mol/L. The surface tension at CMC is 27.43mN/m. The emulsifier showed excellent emulsification effect for the asphalt. The prepared bituminous emulsion had higher storage stability. The emulsifier belongs to rapid-set asphalt emulsifier.

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Synthesis of a novel cationic asphalt emulsifier and its investigation by online FTIR spectrophotometry

Cited by 22 publications

References 5 publications

MPEG grafted quaternized carboxymethyl chitosan for demulsification of crude oil emulsions

MPEG grafted quaternized carboxymethyl chitosan for demulsification of crude oil emulsions

The Synthesis and Characterization of Novel Bis-cationic Asphalt Emulsifier

The Synthesis and Characterization of a Novel Gemini Cationic Asphalt Emulsifier

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