Examination of optimal parameters of oxy-ethylation of fatty acids with a view to obtaining demulsifiers for deliquefaction in the system of skimming and treatment of oil
A method to obtain demulsifier from fatty acids
The present article analyses the state of the problem and presents experimental research for the choice of principal method and main parameters of the process of oxy-ethylation of fatty acids of gossypol resin with a view to obtaining demulsifiers for deliquefaction in the system of skimming and treatment of oil.
It was established that the lumped reaction of condensation of ethylene oxide with fatty acids proceeds with formation of an intermediate complex. Such a reaction may take place without a catalyst, during an acid or base (nucleophilic) catalysis.
During a base catalysis, the first stage of addition is clearly separated from subsequent ones; the first intermediate product can be obtained with the yield approaching 100%. It is only after the exhaustion of the original substance that subsequent ethylene oxide adducts are formed.
Gossypol (2,2′-bis(1,6,7-trihydroxy-3-5-isopropyl-8-aldehydonaphthalene) is a pigment found in cotton (Gossypium). It constitutes 20–40% in weight of the gland responsible for pigmentation and accounts for 0.4–1.7% of the whole kernel (1, 2). Biosynthesis of this toxic substance allows cotton to withstand pests. At the same time, gossypol’s toxicity makes the application of cotton as a food or forage crop restricted (3). Even given the modern methods of cottonseed oil refining, highly toxic gossypol resin is formed, which is then stored in buffers (4).
Gossypol has a number of characteristics that make it an extremely valuable component for the chemical industry and pharmacology. Thus, the latest research has uncovered that gossypol has antifertility, antioxidant, anticancer, antivirus, antiparasitic, and antimicrobial properties and lowers plasma cholesterol (5).It is especially valuable for its ability to fight cancers (6, 7).
Approximately 5.140 mn tons of cottonseed oil were produced in 2013-2014 (8), which provided for nearly 308, 000 tons of soapstock. Soapstock contains between 0.33 and 13% of gossypol (1), ...