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1 (dimethylamino) ethyl, 3-hydroxy-imidazoline hydrochloride and preparation method thereof

A technology of hydroxyimidazolinone hydrochloride and hydroxybenzyl imidazolinone, which is applied in the field of chemistry and can solve problems such as failure to meet environmental protection standards

Inactive Publication Date: 2010-08-18
聂世保
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Electroplating wastewater contains a small amount of heavy metal ions such as chromium, nickel, cadmium, etc. At present, quicklime is usually used to treat electroplating wastewater. After quicklime treatment, it also contains a small amount of heavy metal ions, about 170 mg / L. Now the country proposes more stringent regulations Environmental protection standards, that is, heavy metal ions per liter of water do not exceed 40 mg (<40 mg / L), so the electroplating wastewater is treated only with quicklime and cannot meet the national environmental protection standards, so how to solve this technical problem?

Method used

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  • 1 (dimethylamino) ethyl, 3-hydroxy-imidazoline hydrochloride and preparation method thereof
  • 1 (dimethylamino) ethyl, 3-hydroxy-imidazoline hydrochloride and preparation method thereof
  • 1 (dimethylamino) ethyl, 3-hydroxy-imidazoline hydrochloride and preparation method thereof

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Embodiment 1

[0018] 1 (dimethylamino) ethyl, the preparation method of 3 hydroxyl imidazolinone hydrochloride is:

[0019] (1) After mixing 88g of dimethylaminoethylamine and 217.3g of p-nitrophenol chloroformate, drop into a 500ml spherical bottle, add 70ml of a mass concentration of 20% sodium carbonate solution, and react at 25°C After 4 hours, add 65ml of toluene, transfer it to a separatory funnel, and let it stand for 10 minutes at 10°C to separate the upper oil layer. After mixing the upper oil layer with 124g of benzyl hydroxylamine, add 85ml of it with a mass concentration of 20 % sodium carbonate solution, placed in a 500ml spherical bottle, reacted for 2 hours at 45°C, cooled to 20°C, added a 15% sodium hydroxide solution to adjust the pH value, adjusted to pH=11, and then Stand still for half an hour at 0°C, then separate the upper oil layer, transfer the separated upper oil layer into a vacuum film rotary evaporator, vacuum degree 0.09Mpa, and distill at a temperature of 50°C ...

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Abstract

The invention relates to 1 (dimethylamino) ethyl, 3-hydroxy-imidazolone hydrochloride and a preparation method thereof for effectively solving the problem that electroplating wastewater treatment can not reach the state environmental protection standard. The preparation method of the 1 (dimethylamino) ethyl, 3-hydroxy-imidazolone hydrochloride comprises the steps of: mixing dimethylamino ethylamine and p-Nitrophenyl chloroformate, and then adding a sodium carbonate solution for reaction; mixing an oil layer at the top and benzyl hydroxylamine, and then adding the sodium carbonate solution for reaction; adjusting pH value, standing and distilling to obtain dimethylamino ethyl benzyl hydroxyl urea; putting in a steel kettle together with dichloroethane and the sodium carbonate solution for reaction; adding a sodium hydroxide solution to obtain 1-dimethylamino-ethyl, 3-acrinyl-imidazolone; then adding a hydrogenation kettle for removing benzyl; adding in petroleum ether for separating out 1 (dimethylamino) ethyl, 3-hydroxy-imidazolone; dissolving in water; adding hydrochloric acid for adjusting pH value; and distilling to obtain 1 (dimethylamino) ethyl, 3-hydroxy-imidazolone hydrochloride. The invention is mainly used for the electroplating wastewater treatment.

Description

1. Technical field [0001] The invention relates to the field of chemistry, in particular to 1 (dimethylamino) ethyl, 3-hydroxy imidazolinone hydrochloride and a preparation method thereof. 2. Background technology [0002] Electroplating wastewater contains a small amount of heavy metal ions such as chromium, nickel, cadmium, etc. At present, quicklime is usually used to treat electroplating wastewater. After quicklime treatment, it also contains a small amount of heavy metal ions, about 170 mg / L. Now the country proposes more stringent regulations Environmental protection standards, that is, heavy metal ions per liter of water do not exceed 40 mg (<40 mg / L), so the electroplating wastewater can only be treated with quicklime and cannot meet the national environmental protection standards, so how to solve this technical problem. 3. Contents of the invention [0003] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D233/34C02F1/62
Inventor 聂世保
Owner 聂世保
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