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Oil product dechlorination method

A technology for dechlorination of oil products, applied in the field of dechlorination of oil products, can solve the problems of high price, increased difficulty, complicated equipment, etc., achieve the effect of mild process conditions, convenient operation and improved effect

Active Publication Date: 2014-09-24
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrogenation removal process is mature, but requires more complex equipment and higher operating costs; although the solid adsorbent has a high adsorption removal rate, due to the limitation of its adsorption capacity, when the chloride content is high, the adsorption The catalyst will need to be regenerated due to the rapid reduction of the adsorption capacity. Frequent regeneration will inevitably increase the difficulty of the process operation and increase the cost; the phase transfer catalyst can combine with the ions in the water phase during the reaction process, and use its own to the organic solvent. Affinity, transfer the reactants in the water phase to the organic phase, promote the reaction, effectively improve the dechlorination rate, but the price of the phase transfer catalyst is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 0.369mol NaOH and 0.08mol K 3 PO 4 Mix, stir and dissolve in 60 mL of deionized water. After the dissolution is complete, add 60 mL of waste tire pyrolysis oil, of which the total chlorine content in 60 mL of waste tire pyrolysis oil is 21.6 mmol. After mixing, pour it into a three-necked flask, heat and reflux at 100 °C for 4 h, after the reaction is completed, wait for the reaction liquid to cool, move it to a separatory funnel and let it stand for 1 h to obtain the upper layer oil sample, and measure the oil sample after dechlorination. The total chlorine content is 9.96 mmol, and the dechlorination rate is 53.85%.

Embodiment 2

[0015] 0.184mol NaOH and 0.04mol KNO 3 Mix, stir and dissolve in 30 ml of deionized water. After the dissolution is complete, add 30 mL of recovered automotive gear oil, wherein the total chlorine content in 30 mL of gear oil is 0.036 mmol. After mixing, pour it into a three-necked flask, heat and reflux at 120 °C for 4 h, after the reaction, wait for the reaction liquid to cool, move it to a separatory funnel and let it stand for 1 h to obtain an oil sample in the upper layer, and measure the concentration of the dechlorinated oil sample. The total chlorine content was 0.0049 mmol, and the dechlorination rate reached 86.26%.

Embodiment 3

[0017] 0.225mol KOH and 0.06mol NaNO 3 Mix, stir and dissolve in 45 mL of deionized water. After the dissolution is complete, add 30 mL of waste tire pyrolysis oil, of which the total chlorine content in 30 mL of waste tire pyrolysis oil is 10.8 mmol. After mixing, pour it into a three-necked flask, heat and reflux at 140 °C for 4 h, after the reaction, wait for the reaction liquid to cool, move it to a separatory funnel and let it stand for 1 h to obtain the upper layer oil sample, and measure the concentration of the dechlorinated oil sample. The total chlorine content is 2.966 mmol, and the dechlorination rate is 72.53%.

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Abstract

The invention relates to an oil product dechlorination method which comprises the following steps: adding alkaline matter and salt into deionized water to prepare an alkaline salt solution of which the concentration of the compound disclosed in the specification is 4-6.5 mol / L and the anionic concentration of salt is 1-1.5 mol / L; mixing the alkaline salt solution and the oil product according to the mole ratio of the sum of the compound disclosed in the specification and salt anions to the compound disclosed in the specification of (15.5-5000):1; and reacting under reflux for 2-4 hours, cooling, standing, and skimming to obtain the dechlorinated oil product, wherein the alkaline matter is alkali-metal hydroxide, and the salt is nitrate or phosphate of alkali metal and alkali earth metal. The method has the characteristics of mild technological conditions, favorable dechlorination effect and the like, is simple to operate, and is suitable for carrying out dechlorination pretreatment on low-chlorine-content and high-chlorine-content oil products and industrial waste oil.

Description

technical field [0001] The invention relates to a method for dechlorination of oil products, which belongs to the field of petroleum processing. Background technique [0002] In recent years, in order to increase production, many oil fields have added a variety of additives to oil extraction and processing processes to increase oil production, resulting in a substantial increase in the content of organic chlorine in crude oil and crude oil processed distillates, and the pyrolysis of waste tires to produce The fuel oil and various industrial waste oils recovered also contain a large amount of organic chlorides. [0003] The chlorides in the above-mentioned oil products will bring great harm during the processing: 1. Catalyst poisoning. During the processing of oil products, the inorganic chlorine produced by organic chlorides will cause catalyst poisoning; 2. Pipeline blockage. In the process of catalytic hydrogenation, organic chlorides will produce HCl, and substances con...

Claims

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Application Information

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IPC IPC(8): C10G19/02
Inventor 周如金汤占帅吕尚庆邱松山吴世逵
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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