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Petroleum sulfoxide and preparation method thereof

A technology for petroleum sulfoxide and high-sulfur crude oil, which is applied in the field of chemical extraction, can solve the problems that are not conducive to improving the production efficiency of petroleum sulfoxide, high oxidation temperature, and strong volatility of benzene, so as to speed up the oxidation reaction rate, improve the production efficiency, The effect of shortening the reaction time

Inactive Publication Date: 2015-11-04
XIAN THERMAL POWER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the benzene used in this method is highly volatile and highly toxic, which seriously endangers the health of the human body.
In addition, the oxidation system of acetic acid and hydrogen peroxide requires higher oxidation temperature and longer oxidation time, which is not conducive to improving the production efficiency of petroleum sulfoxide

Method used

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  • Petroleum sulfoxide and preparation method thereof
  • Petroleum sulfoxide and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Take 800ml of crude oil in a round-bottomed flask, heat it to carry out normal pressure boiling point distillation, collect fractions at 275-325°C and 325-350°C respectively, and measure the total sulfur content in the three fractions collected by coulometric method. The volumes of the collected 275-325 and 325-350°C fractions are 226ml and 326ml respectively, and their sulfur contents are 5.27g / l, 21.04g / l, and 18.36g / l respectively. Put the collected fractions at 275~350℃ in a 1000ml four-neck flask, mix well, and at the same time add dropwise hydrogen peroxide with 1 times the sulfur content of petroleum and 1ml of MnSO with a concentration of 2%. 4 solution, the dropping speed is 1.5 drops / second, the reaction temperature is 20±2°C, and the stirring rate is 300 rpm. After the dropwise addition, the stirring reaction was continued for 1 hour, the layers were separated, and the brown liquid in the upper layer was collected to obtain crude petroleum sulfoxide. Add ben...

Embodiment 2

[0024] Put the collected fraction at 275~350°C in a 1000ml four-necked flask, mix well, and at the same time add 1.2 times the sulfur content of petroleum hydrogen peroxide and 2ml of 2% MnSO 4 solution, the dropping speed is 1.5 drops / second, the reaction temperature is 20±2°C, and the stirring rate is 300 rpm. After the dropwise addition, the stirring reaction was continued for 1 hour, the layers were separated, and the brown liquid in the upper layer was collected to obtain crude petroleum sulfoxide. Add benzenesulfonic acid to the crude product of petroleum sulfoxide at a ratio of 1:0.8, mix well, let stand to separate layers, and take the lower layer of liquid. Add cyclohexane into the above-mentioned lower layer liquid at a ratio of 1:0.8, mix evenly, let it stand for stratification, take the upper layer liquid, wash it three times with deionized water, collect the benzene extract phase and carry out vacuum distillation on it, and distill out the cyclohexane Hexane to o...

Embodiment 3

[0026] Put the collected fraction at 275~350°C in a 1000ml four-necked flask, mix well, and at the same time add 1.3 times the sulfur content of petroleum hydrogen peroxide and 3ml of 2% MnSO 4 solution, the dropping speed is 1.5 drops / second, the reaction temperature is 20±2°C, and the stirring rate is 300 rpm. After the dropwise addition, the stirring reaction was continued for 1 hour, the layers were separated, and the brown liquid in the upper layer was collected to obtain crude petroleum sulfoxide. Add benzenesulfonic acid to the crude product of petroleum sulfoxide at a ratio of 1:1.2, mix well, let stand to separate layers, and take the lower layer of liquid. Add cyclohexane to the above-mentioned lower layer liquid in a ratio of 1:1.2, mix well, let stand to separate layers, take the upper layer liquid, wash it three times with deionized water, collect the benzene extract phase and carry out vacuum distillation to it, and distill out the cyclohexane Hexane to obtain p...

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Abstract

The invention relates to a petroleum sulfoxide and a preparation method thereof. The preparation method includes: taking high-sulfur crude oil with a sulfur content of greater than 2% as the raw material, collecting fraction through true boiling point distillation cutting, taking H2O2 and MnSO4 as the oxidation system to oxidize the collected fraction at room temperature so as to obtain a petroleum sulfoxide crude product, and using benzenesulfonic acid and cyclohexane as the extraction agent for purification of the petroleum sulfoxide crude product so as to finally obtain the petroleum sulfoxide. According to the invention, H2O2 and MnSO4 are adopted as the oxidation system, wherein H2O2 serves as the oxidizing agent and MnSO4 serves as the catalyst. The oxidation system can accelerate the oxidation reaction rate of crude oil fraction, shorten the reaction time, and lower the oxidation reaction temperature so as to save energy consumption. Cyclohexane with low toxicity to human is employed as the solvent so as to reduce the harm of toxic solvent to human and environment, thus being beneficial to environmental protection. The fraction cut by true boiling point distillation has high petroleum thio-ether content, and is conducive to improving the preparation efficiency of petroleum sulfoxide.

Description

technical field [0001] The invention relates to the field of chemical extraction, specifically a petroleum sulfoxide and a preparation method thereof Background technique [0002] Petroleum sulfoxide is non-toxic, non-corrosive, and low in production cost, and is widely used in the extraction of precious and rare metals. In addition, petroleum sulfoxide has a special affinity for sulfur dioxide in coal-fired flue gas, and is also used in the removal of sulfur dioxide from coal-fired flue gas. [0003] The Soviet Union was one of the first countries to develop petroleum sulfoxide products. In 1979, the Soviet Union reported the separation of petroleum sulfoxide by multi-stage extraction with 70-90% acetic acid, with an extraction rate of 80-94%; extraction with 55-65% sulfuric acid The method of separating petroleum sulfoxide by neutralizing the extract with alkali, the extraction rate reaches 90%, but the obtained product contains a large amount of asphalt. In order to imp...

Claims

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Application Information

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IPC IPC(8): C07C315/00C07C317/00
Inventor 付康丽姚明宇钦传光蔡铭李阳程广文聂剑平
Owner XIAN THERMAL POWER RES INST CO LTD
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