A Study on Chemical Conditioning Separation and Interface Modulation Mechanism of High Emulsified Oily Sludge
Oily sludge is a kind of solid waste generated during the process of crude oil exploitation, storage, transportation, and refining, and is one of the main pollutants in the petroleum industry. With the increasing scale of oil exploitation, the generated oily sludge is significantly increasing. Long term exposure of oily sludge to the air leads to the accumulation of heavy oil because of the volatilization of light oil, then resulting in high emulsification stability of oily sludge. This project aims to address the technical issue of high emulsification stability of oily sludge. Efficient chemical conditioning agents are developed, by synthesizing polymer chemical agents and compounding them with other additives, to reduce the emulsification stability of oily sludge. The change rules of interfacial tension between oil and water and surface tension of oil solid particles are studied through chemical conditioning.
New Industry And Energy
Technologies to improve natural resource extraction
2025.01~2026.12
Xian city, shaanxi province
At present, the demulsifiers used for oil sludge conditioning and destabilization both domestically and internationally are mainly blocked non-polyether demulsifiers and cationic macromolecular demulsifier. Blocked polyether demulsifiers are mainly polymers formed by block polymerization of propylene derivative monomers such as EO and PO under high temperature and pressure. This type of demulsifier is applied due to its unique molecular structure, where the hydrophilic and oleophilic groups in the structure act on specific emulsions for demulsification. The most widely used demulsifiers in practical application are EO/PO blocked polyether demulsifiers, such as AE, AP, phenolic 3111, AF, AR. This type of demulsifier has relatively simple synthesis conditions, good solubility, and has strong applicability under low temperature conditions. Therefore, modifying such demulsifiers is to maximize their relative molecular weight and expand their molecular structure as much as possible. Cationic macromolecular demulsifiers are mainly hyperbranched polymers synthesized through Michael addition reactions of cationic monomers and amine salts. This demulsifier has gradually become a focus of attention due to its three-dimensional network structure, good solubility, low viscosity, and a large number of terminated functional groups. At present, these series of demulsifiers widely used in practical application both domestically and internationally are mainly SP169, BP169, and BPE. The demulsification performance of this type of demulsifier is mainly improved by upgrading its dendritic structure and increasing its molecular weight. Due to its good adaptability and stability of pH value, Cationic macromolecular demulsifiers have promising research prospects in the field of demulsification applications.
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