Optimization of Sulphate Soap Washing with Acid Water and the Quality Conformance Assessment of Tall Oil with Regulatory Requirements

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UDС

658.562.012.7:676.085.2:66.021.3

DOI:

10.17238/ issn0536-1036.2018.3.149

Abstract

The key problem of industrial methods for obtaining tall oil is its significant losses with production waste. The reason is the presence of lignin in the raw material, which causes emulsification of the oil in acid water with formation of a stable emulsion. Known ways to destroy it are ineffective and involve significant energy costs. The amount of emulsion can be reduce by removing lignin from sulphate soap, usually by washing in an alkaline medium. The purpose of this work was to study the washing of sulphate soap in an acidic environment, optimizing the regime for minimum lignin content in soap, and assessing the compliance of the quality indicators of tall oil from washed soap to the requirements of Russian standards. Lignin subsidence does not prevent its separation from soap if the washing regime is selected correctly. By constructing a four-factorial fractional experiment, the optimal values of the factors influencing the separation of lignin during washing are obtained. The analysis of the quality parameters of tall oil obtained after washing has been carried out, the quality level has been estimated in relation to the specifications for crude tall oil. The acid water washing has a positive effect on the oil quality.

Authors

S.I. Tret'yakov, Candidate of Engineering Sciences, Professor
A.A. Glukhanov, Candidate of Engineering Sciences

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; e-mail: a.gluhanov@narfu.ru

Keywords

sulphate soap, lignin, washing, optimum performance, tall oil, quality index, specifications

For citation

Tret’yakov S.I., Glukhanov A.A. Optimization of Sulphate Soap Washing with Acid Water and the Quality Conformance Assessment of Tall Oil with Regulatory Require-ments. Lesnoy zhurnal [Forestry journal], 2018, no. 3, pp. 149–160. DOI: 10.17238/ issn0536-1036.2018.3.149

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Received on January 22, 2018