Recovery and treatment method for hazardous waste in production of aluminum alkyl

A technology for hazardous waste and production process, applied in chemical instruments and methods, purification/separation of hydrocarbons and hydrocarbons, etc., which can solve the problems of long oxidation time, long contact time between activated carbon and polymer solution, and increased product cost.

Active Publication Date: 2013-07-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN87102862A discloses a method for deactivating alkylaluminum, using triglyceride or natural oil containing triglyceride to reduce the activity of alkylaluminum catalyst in hydrocarbon carrier, according to the ratio of aluminum: triglyceride=1.1-6.1 Adding triglyceride in molar ratio, this method is realized by applying triglyceride and alkylaluminum to react mildly and insoluble with atactic polypropylene, this method only realizes the separation of polyethylene product and the separation of triethylaluminum Deactivation, does not remove triethylaluminum from hydrocarbons as solvent, and added triglycerides increase product cost
The hydrogenated polymer of this method must be fully oxidized with molecular oxygen, the oxidation time is long, and a large amount of activated carbon is required, and the contact time between activated carbon and polymer solution is long, the efficiency is low, and it is not suitable for industrial scale-up

Method used

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  • Recovery and treatment method for hazardous waste in production of aluminum alkyl
  • Recovery and treatment method for hazardous waste in production of aluminum alkyl
  • Recovery and treatment method for hazardous waste in production of aluminum alkyl

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] After replacing the 300L reactor with nitrogen, add 100L of waste solvent containing 15% (weight ratio) of alkylaluminum and 10% (weight ratio) of aluminum powder into the reactor, start stirring, and add carbon dioxide to the solvent through the bottom tube In the process, the feeding speed is controlled at 5 liters / minute. Excess carbon dioxide is vented to atmosphere through the exhaust port. When the temperature is lower than 40°C, the system pressure is maintained at normal pressure ~ 0.1MPa. The carbon dioxide flow was stopped and water was added at a controlled rate. At the same time, the reaction temperature is controlled to be 10-60° C., and the pressure in the mixing process is not higher than 0.3 MPa. Fully stir and mix, and the gas generated during the reaction is passed into the torch system. The reacted mixture solution is filtered, and the separated oil-water mixture is collected, left to stand, naturally separated, and the supernatant obtained after d...

Embodiment 2

[0017] The processing steps are the same as in Example 1, except that the content of alkylaluminum in the raw material accounts for 2%, 6%, 10%, and 14% of the solvent respectively. The factors that need to be controlled in the reaction are shown in Table 2.

[0018] Table 2 Factors to be controlled in reaction

[0019]

[0020]

Embodiment 3

[0022] The processing steps and raw materials are the same as in Example 1, except that the ratios of the amount of water added to the solvent are 50%, 100%, 200%, and 300%, respectively. The factors that need to be controlled in the reaction are shown in Table 3.

[0023] Factors to be controlled in table 3 reaction

[0024]

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PUM

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Abstract

The invention relates to a recovery and treatment method for hazardous waste in production of aluminum alkyl. The method comprises the following steps: adding a solvent containing aluminum alkyl and aluminum powder into a reaction vessel after displacement of the reaction vessel with nitrogen and starting stirring; introducing carbon dioxide for 1 to 40 min, with an introduction speed controlled to be 5 L/min; when a temperature is lower than 40 DEG C, maintaining system pressure to be in a range of normal pressure to 0.1 Mpa and stopping introduction of carbon dioxide; adding water accounting for 50 to 300% by volume of the volume of the solvent, controlling a reaction temperature to be 10 to 60 DEG C and a pressure in a reaction to be 0.01 to 0.1 Mpa and carrying out full stirring and mixing; and filtering a mixture solution obtained after the reaction, collecting a separated oil-water mixture and carrying out standing and layering to obtain supernatant liquid which is a recovered solvent. The method provided in the invention is applicable to recovery and treatment of waste solvents containing different amounts of aluminum alkyl and aluminum powder and can effectively treat a solvent containing no more than 15 wt% of aluminum alkyl and o more than 10 wt% of aluminum powder.

Description

technical field [0001] The invention relates to a method for recovering organic wastes, in particular to recovering wastes including alkylaluminum, aluminum powder metal and other components produced in the production process of alkylaluminum. Background technique [0002] In addition to being widely used as catalysts for polymer synthesis, aluminum alkyls are also catalysts for olefin oligomerization and dimerization, as well as high-energy fuels for rockets and jet engines. Hazardous level, the industrial production method of alkyl aluminum is to use metal aluminum, olefins, and hydrogen as raw materials, and it is obtained by distillation and refining after reaction. The raffinate after distillation mainly contains alkyl aluminum and partially active aluminum powder. Aluminum will spontaneously ignite when exposed to air, and it needs to be diluted with solvents such as isopentane and mineral oil until the alkyl aluminum is less than 15 (% by weight, the same below), and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/35C07C9/15C07C9/18C07C13/18C07C7/00A62D101/20
Inventor 篓阳韩运旺程光剑胡春生张敏黄集钺韩秋萍
Owner PETROCHINA CO LTD
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