Sulaimon, Aliyu Adebayo;Masri, Asiah Nusaibah;Jamil Sabri, Umar Abdul Aziz;Adeyemi, Bamikole Joshua published 《Predicting naphthenate precipitation and evaluating the effect of ionic liquids on its deposition》 in 2022. The article was appeared in 《Journal of Petroleum Science & Engineering》. They have made some progress in their research.Safety of 1-Ethyl-3-methyl-1H-imidazol-3-ium chloride The article mentions the following:
Naphthenic acids that are naturally carboxylic compounds contained in heavy crude oil are the main source of corrosion and blockage in a crude oil pipeline. The blockage is due to the formation of naphthenate deposits through a reaction of naphthenic acid with metal ions present in the crude oil. In the present study, model oil is used to evaluate the effect of water cut in the range of 10%-90%, brine pH in the range of 6-10, Ca2+ concentration in the range of 0.5%-2.5% and temperature in the range of 30 °C-60 °C towards naphthenate deposition with the aid of response surface methodol. NMR (NMR) and Fourier Transform IR (FTIR) were used to evaluate the structure of the naphthenic acids used. Results show that Ca2+ concentration contributes mostly to the naphthenate deposition, followed by brine pH, water cut and temperature Two math. models were developed to predict the final pH of the oil-brine system and the mass of precipitates with average relative errors (AREs) of 0.0328 and 0.0325 resp. The effects of two ionic liquids (ILs), 1-ethyl-3-methylimidazolium chloride (EMIM-Cl) and 1-butyl-3-methylimidazolium chloride (BMIM-Cl), on naphthenates precipitation, were also evaluated. Anal. showed that both ILs can reduce the amount of naphthenate deposited, with the BMIM-Cl showing better performance than the EMIM-Cl. And 1-Ethyl-3-methyl-1H-imidazol-3-ium chloride (cas: 65039-09-0) was used in the research process.
1-Ethyl-3-methyl-1H-imidazol-3-ium chloride(cas: 65039-09-0) is an imidazolium chloride ionic liquid that can be used as:a solvent as well as catalyst for the depolymerization of oak wood lignin; a solvent in the hydrolysis of hemicellulose (xylan) to xylose using Brønsted acid catalysts.Safety of 1-Ethyl-3-methyl-1H-imidazol-3-ium chloride
Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem