New Potential Demulsifiers Obtained by Processing Gossypol Resin

Abstract

Water contained in crude oil, forms so-called water-in-oil emulsions, the presence of which negatively affects the transportation and processing of oil. Demulsifiers are the special mixtures that are used to remove water from emulsions. The present paper is devoted to obtaining the demulsifiers by catalytic acid esterification of fatty acids mixture extracted from gossypol resin with isopropanol. Fourteen mixtures, containing mainly fatty acids and their ethers, were obtained and tested for demulsifying performance by using the bottle test. The relationship of the following values with the demulsibility of final mixtures was determined: the conditions of fatty acids esterification, the content of fatty acids in the demulsifier, the relative solubility number of the demulsifier, the toluene/water dynamic interfacial tension. The following conditions of fatty acids mixture esterification provided 64.8% of water removal at the dosage of 20 ppm of demulsifier: 385 K; 4 h; H2SO4/fatty acids mixture ratio 2.5 wt.%.

Preparation and Examination of a Composite Demulsifier for Paraffin Base Oil

“…The composition of the vacuum distillate of fatty acids established by gas-liquid chromatography included free fatty acids: saturated (palmitic 18.0, stearic 2.1, myristic 1.4, arachidic 0.5 %); unsaturated (linoleic 30.2, linolenic 24.6, oleic 18.7 %). After washing with water at 60 °C, this composition was chosen for producing PEG esters in an RKU RVD-2-150 highpressure reactor by using technology developed in M. Auezov South Kazakhstan University [26].…”

Obtaining High‐Paraffin‐Content Oil Depressants

“…When preparing the depressor action composition for highparaffin oils, cotton soap stock FA were selected as initial compounds; they were prepared according to the method described in [17,18], including FA in a mixture (mainly C16-C18) from 70 % to 75 %, with an average molecular weight of 276 g mol -1 . A mixture of FA with an acid number of 200-210 mg KOH includes lauric, myristic, palmitic, stearic, oleic, and linoleic acids.…”

“…Technical gossypol was prepared from cotton soap stock, a production waste during the refining of cotton oil, by sulfuric acid neutralization according to the technology described in [17].…”

“…Earlier, fatty acids (FA) were prepared from tars of FA distillation by alkaline saponification, neutralization with sulfuric acid, and subsequent gasoline extraction; however, they contained a number of impurities that reduced the quality of the final product and led to its relatively high cost [17,18].…”

Formulation of Composite Materials Containing Tengiz Sulfur-Oil Production Waste

“…Polymeric sulfur allows reducing the amount of sulfur during the process without decreasing the rate of vulcanization, which leads to an increase in the quality of rubber. The usage of polymer sulfur allows adjusting the elastic properties of the rubber produced [Behera and Prasad, 2020, Nadirov, 2003, Otarbaev et al, 2019.…”