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Recovery processing method for production waste of organosilane coupling agent containing beta-qae-gamma-aminopropyl group

A silane coupling agent, recycling technology, applied in the direction of silicon organic compounds, etc., can solve the problems of ineffective processing of production waste, increase the production cost of enterprises, affect health and other problems, achieve low production cost, save waste disposal fees, The effect of cheap raw materials

Inactive Publication Date: 2004-08-18
严晓东 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] (1) Provide free feed to local fish farmers as fish feed. However, these organic production wastes may contain harmful substances. After long-term consumption of fish, these harmful substances may also accumulate in their bodies, which may affect the consumption of such fish. (2) Some manufacturers purchase quicklime for neutralization treatment, and then landfill the waste after neutralization treatment. Using this method not only requires a certain treatment cost, but it is calculated that every organic waste treated It costs about 300-350 yuan, and landfill waste will cause secondary pollution to the environment; (3) Some manufacturers send the organic production waste to the recycling station designated by the local environmental protection department for centralized treatment, but this is generally To pay a certain fee to the recycling station, it costs about 300 yuan per ton, plus the freight, so it costs about 400 yuan per ton, which greatly increases the production cost of the enterprise.
As can be seen from the above, the above treatment methods have many shortcomings, and cannot effectively deal with the production of organic silane coupling agents containing β-aminoethyl γ-aminopropyl groups. scrap

Method used

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  • Recovery processing method for production waste of organosilane coupling agent containing beta-qae-gamma-aminopropyl group
  • Recovery processing method for production waste of organosilane coupling agent containing beta-qae-gamma-aminopropyl group
  • Recovery processing method for production waste of organosilane coupling agent containing beta-qae-gamma-aminopropyl group

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this embodiment, the concentration of ethylenediamine hydrochloride and ethylenediamine in the production waste used is about 70%.

[0035] Take 100 grams of the above-mentioned production waste, put it into a flask, add 60 grams of NaOH, and then carry out heating and distillation, and keep the temperature at about 100 ° C. At this time, the ethylenediamine hydrochloride and hydrogen in the production waste The ethylenediamine generated by the reaction of sodium oxide will be vaporized and volatilized. Therefore, ethylenediamine can be recovered by condensing and recovering the evaporated gas during distillation; when the recovery of ethylenediamine is completed, a total of Ethylenediamine 64.2 grams. Then, cool the reaction mixture in the flask to below 80°C, generally to normal temperature, and add water to the flask to adjust the pH value of the reaction mixture, and adjust the pH value of the reaction mixture to about 7.0; the flask Stand still for about 30 min...

Embodiment 2

[0038] In this embodiment, the concentration of ethylenediamine hydrochloride and ethylenediamine in the production waste used is about 60%.

[0039] Take 100 grams of the above-mentioned production waste, put it into a flask, add 45 grams of CaO, and then carry out heating and distillation, and keep the temperature at about 115 ° C. At this time, the ethylenediamine hydrochloride and CaO in the production waste The ethylenediamine produced by the reaction will be vaporized and volatilized. Therefore, ethylenediamine can be recovered by condensing and recovering the evaporated gas during distillation; Amine 56.2 g. Then, cool the reaction mixture in the flask to below 90°C, generally to normal temperature, and add water to the flask to adjust the pH value of the reaction mixture, and adjust the pH value of the reaction mixture to about 8.0; the flask Let it stand for about 30 minutes until the reaction mixture is separated into layers. At this time, the corresponding organosi...

Embodiment 3

[0042] In this embodiment, the concentration of ethylenediamine hydrochloride and ethylenediamine in the production waste used is about 70%.

[0043] Take 100 grams of the above-mentioned production waste, put it into a flask, add 60 grams of NaOH, and then carry out heating and distillation, and keep the temperature at about 130 ° C. At this time, the ethylenediamine hydrochloride and hydrogen in the production waste The ethylenediamine generated by the reaction of sodium oxide will be vaporized and volatilized. Therefore, ethylenediamine can be recovered by condensing and recovering the evaporated gas during distillation; when the recovery of ethylenediamine is completed, a total of Ethylenediamine 64.2 grams. Then, cool the reaction mixture in the flask to below 70°C, generally to normal temperature, and add water to the flask to adjust the pH value of the reaction mixture, and adjust the pH value of the reaction mixture to about 9.0; the flask Stand still for about 30 min...

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Abstract

The recovering treatment process of waste from organosilicon coupling agent production and containing beta-azyloxy-gamma-aminopropyl radical includes heating distillation and condensating recovery of the waste added with strong alkaline matter in some reactor to recover ethylenediamine; and subsequent cooling of the reaction mixture while adding water to regulate pH value for effective laminating separation to separate organosilicon coupling agent in the upper layer of the reaction mixture. The present invention has the advantages of less investment in apparatus, simple technological process, simple operation and elimination of secondary pollution.

Description

technical field [0001] The invention belongs to the field of organic chemical industry, and in particular relates to a method for recycling production waste produced during the production of organosilane coupling agents containing β-aminoethyl-γ-aminopropyl groups. Background technique [0002] The structural formula of organosilane coupling agent is RSiX 3 , due to the difference between the R group and the X group, it can be divided into many different varieties. Among them, the R group is a hydrocarbon group, an aromatic group, or a composite group with an amine group, and X is a methoxy group. One of a group, or a methoxy group and an alkyl group, or an ethoxy group, or an ethoxy group and an alkyl group. In the family of organosilane coupling agents, there is a class of organosilane coupling agents containing β-aminoethyl-γ-aminopropyl groups, whose structural formula is: NH 2 -CH 2 -CH 2 -NH-CH 2 -CH 2 -CH 2 -, [0003] Such as: (1) The chemical name is: N-β-am...

Claims

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Application Information

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IPC IPC(8): C07F7/20
Inventor 刘建国严晓东刘震
Owner 严晓东