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Technology for homogeneous hydrogenation pretreatment and dechlorinating of used mineral oils

A waste mineral oil, hydrodechlorination technology, applied in the field of hazardous waste resources reuse and environmental protection, can solve the problems of decompression tower blockage, blockage of pipelines, and long-term operation of the device, so as to increase the start-up time and prevent The effect of clogging

Inactive Publication Date: 2019-07-23
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the vacuum distillation part of this process, it is easy to cause the blockage of the vacuum tower, which makes the device unable to run for a long time. In addition, because the waste mineral oil contains chlorine, the chloride will seriously corrode the equipment when the waste mineral oil is recycled, and even lead to waste mineral oil recovery. The utilization device cannot operate normally, and these chlorides will generate ammonium chloride in the waste mineral oil high-pressure hydrotreating device, block the pipeline, and even enter the circulating hydrogen system, seriously affecting the normal operation of the circulating hydrogen compressor

Method used

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  • Technology for homogeneous hydrogenation pretreatment and dechlorinating of used mineral oils
  • Technology for homogeneous hydrogenation pretreatment and dechlorinating of used mineral oils
  • Technology for homogeneous hydrogenation pretreatment and dechlorinating of used mineral oils

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The waste mineral oil is mixed with the circulating hydrogen at the outlet of the circulating hydrogen compressor 14 through the feed pump 1 and enters the mixer 2, and the uniformly mixed raw material enters the raw material heat exchanger 3 to exchange heat with the hydrodechlorination reaction product, and the temperature is exchanged to 200°C and then enter the feed heating furnace 4, heat the raw materials to 320°C and then mix with the composite molecular homogeneous catalyst and enter the homogeneous hydrogenation reactor 5 for hydrogenation reaction, the reaction temperature is 320°C, the pressure is 3.0Mpa; The reaction product from the phase reactor 5 enters the hot high-pressure separator 6, and the gas phase at the top of the hot high-pressure separator 6 enters the hydrodechlorination reaction 7 and the dechlorination adsorption reactor 8 at a temperature of 320 °C and a pressure of 2.5 MPa. Hydrodechlorination and dechlorination adsorption reaction. After t...

Embodiment 2

[0019] The waste mineral oil is mixed with the circulating hydrogen at the outlet of the circulating hydrogen compressor 14 through the feed pump 1 and enters the mixer 2, and the uniformly mixed raw material enters the raw material heat exchanger 3 to exchange heat with the hydrodechlorination reaction product, and the temperature is exchanged to 260°C and then enters the feed heating furnace 4, heats the raw material to 360°C and then mixes with the composite molecular homogeneous catalyst and enters the homogeneous hydrogenation reactor 5 for hydrogenation reaction, the reaction temperature is 360°C, the pressure is 4.0Mpa; The reaction product from the phase reactor 5 enters the hot high-pressure separator 6, and the gas phase at the top of the hot high-pressure separator 6 enters the hydrodechlorination reaction 7 and the dechlorination adsorption reactor 8 at a temperature of 360 ° C and a pressure of 3.2 MPa. Hydrodechlorination and dechlorination adsorption reaction, th...

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Abstract

At present, pretreatment of used mineral oils is generally performed in the manner of filtering and reduced pressure distillation. For example, a treatment method thereof comprises the following steps: removing water and mechanical impurities from a waste lubricating oil by filtering, and then utilizing reduced pressure distillation to cut the waste lubricating oil into lubricant base oils with different fractions. However, such a technology is easy to cause blocking of a vacuum tower in the stage of reduced pressure distillation so as to result in incapability of long-term running of the device; chlorine is contained in the used mineral oil, so that the device is seriously corroded by chlorides when the used mineral oil is recycled, and a recycling device of the used mineral oil even cannot normally run; the chlorides are capable of generating ammonium chloride in a high-pressure hydrofining device of the used mineral oil, so as to block a pipeline, enter into a hydrogen recycling system and seriously influence normal running of a circulating hydrogen compressor. Through a large number of experimented researches on pretreatment of used mineral oils, the invention provides a technology for homogeneous hydrogenation pretreatment and dechlorinating of used mineral oils.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste resource reuse and environmental protection, and relates to a low-pressure homogeneous hydrogenation pretreatment and dechlorination process for waste mineral oil. Background technique [0002] Mineral oil is currently the most widely used chemical substance in the world. However, if the waste oil produced after the use of mineral oil is not properly disposed of, it will cause serious pollution to water bodies and soil, endanger the growth of animals and plants and the living environment of human beings. Listed as high-risk waste for priority management. However, less than 10% of the waste lubricating oil deteriorates, and fuel oil and lubricating oil base oil for industrial power can be produced. Therefore, the comprehensive utilization of waste mineral oil is of great significance for alleviating the shortage of resources in our country, solving the bottleneck problem of oil products in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/1007
Inventor 陈松王康县许发有李学兵李广慈王忠吴孟德
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI