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Study on Synthesis of NPS-2 Petroleum Sulfonates

Author: ShiJingTao
Tutor: NanGuoZhi
School: China University of Petroleum
Course: Chemical Engineering and Technology
Keywords: Petroleum sulfonate Falling film reactor Orthogonal test Interfacial tension
CLC: TE39
Type: Master's thesis
Year: 2010
Downloads: 57
Quote: 0
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Abstract


As raw material to extract oil A, extract oil B, the gas phase SO3 sulfonation agent in the process of synthetic petroleum sulfonate falling film sulfonation reactor. Determination of the basic nature of the feedstock oil; improved method for the separation of the pretreatment method and product of the feedstock oil insolubles; sulfonation processes as a raw material in order to extract oil A, extracted oil B factors were investigated to determine the suitability sulfonated range of conditions; through orthogonal experiment the optimum conditions of different raw oil sulfonated; using rings Law and spinning drop method of measuring the the petroleum sulfonate product of surface tension and oil / water interfacial tension; two-phase titration Determination of the average molecular weight and effective materials; optimize the product under the conditions determined by the surface tension method to optimize the product under the conditions of the CMC; using infrared spectroscopy, elemental analysis and NMR techniques to optimize under the conditions of the product of the molecular structure characterization. Feedstock analysis showed that: the two aromatics content of the feedstock oil in more than 60%, molecular weight between 340-400, suitable as a raw material of the synthetic petroleum sulfonates. The results show that: the sulfonation process as raw material to extract oil A, the optimal conditions: oil ratio 1.3, acid hydrocarbon than 1.8, the gas concentration of 4.5%, the reaction temperature is 40 ° C, the aging temperature 40 ° C, aging time 30min; to sulfonation process raw extract oil B, optimal conditions: oil ratio 1.6, acid hydrocarbon than 2.0, the reaction temperature is 35 ℃, gas concentration of 4.5%, the aging temperature 40 ° C, aging time 30min. The product analysis results showed that: obtained under optimized conditions effective petroleum sulfonate A content was 77.28%, and the average molecular weight of 489, the CMC was 0.10%, the surface tension is 29.85 mN m-1. Under conditions without aids, petroleum sulfonate solution A (concentration of 0.125%) 40min within allows the oil / water interfacial tension is reduced to less than 10-3 mN · m-1. Obtained under the optimal conditions of petroleum sulfonate B active matter content of 73.19%, with an average molecular weight of 542, the CMC was 0.17%, and a surface tension of 32.02mN · m-1. Two petroleum sulfonate reached EOR surfactant performance. The petroleum sulfonate A surfactant is better than the petroleum sulfonates B. The analysis results showed that: 1190cm-1 in the infrared spectrum, and 1060cm-1 showed an infrared absorption peak, confirming the presence of a sulfonic acid group in the product; seen on the molecular structure characterization by means of NMR and elemental analysis: petroleum sulfonic maleate A molecule containing an average of the three aromatic rings and 2-3 branched chain in the molecule a sulfonic acid base is 1.23, mainly monosulfonate; petroleum sulfonate B molecule contains an average of four aromatic rings and containing 2-3 article branched side chains in the molecule a sulfonic acid cardinality of 1.40, which contains some double sulfonates.

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