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Synthesis method of isopropylhydrazine

A technology of isopropylhydrazine and synthesis method, which is applied in the field of synthesis of isopropylhydrazine, can solve the problems of high production cost, environmental pollution, long process route, etc., achieve less waste discharge, less risk of reaction, and lower production cost low effect

Inactive Publication Date: 2018-05-18
重庆丽澄环保科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis method has a long process route, high risk of hydrogenation process, high process conditions, complex process, yield less than 80%, and high production cost; in addition, because the by-product sodium carbonate contains a large amount of organic impurities, recycling and The cost of environmental protection treatment is relatively high, and it is easy to cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Put 450g of isopropanol, 260.4g of hydrazine hydrate with a content of 96% and 38g of sodium tripolyphosphate into the reactor, start stirring, heat up to 80°C, close the reactor, continue to heat up to 120°C, and keep it warm for 7 hours After the reaction, the temperature of the reactor was lowered to 80° C., and then the upper organic phase in the reactor was transferred to a rectification kettle for rectification, and the temperature was collected at 106 to 108° C. to obtain 345.3 g of isopropylhydrazine.

Embodiment 2

[0013] Put 525g of isopropanol, 255.1g of hydrazine hydrate with a content of 98% and 25g of sodium tripolyphosphate into the reaction kettle, start stirring, close the reaction kettle when heating to 80°C, continue to heat up to 110°C, and keep warm for 6 hours After the reaction, the temperature of the reactor was lowered to 80° C., and then the upper organic phase in the reactor was transferred to a rectification kettle for rectification, and the temperature was collected at 106 to 108° C. to obtain 339.2 g of isopropylhydrazine.

Embodiment 3

[0015] Put 600g of isopropanol, 252.5g of hydrazine hydrate with a content of 99% and 50g of sodium tripolyphosphate into the reactor, start stirring, heat up to 80°C, close the reactor, continue to heat up to 130°C, and keep it warm for 8 hours After the reaction, the temperature of the reactor was lowered to 80°C, and then the upper organic phase in the reactor was transferred to a rectification kettle for rectification, and the temperature was collected at 106-108°C to obtain 352.6 g of isopropylhydrazine.

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Abstract

The invention provides a synthesis method of isopropylhydrazine. The synthesis method comprises the following steps: under protection of inert gas, carrying out alkylation reaction on isopropyl alcohol and hydrazine hydrate under the action of a catalyst and at a certain temperature, generating the isopropylhydrazine, separating an organic phase containing the isopropylhydrazine from a water phaseafter the reaction is finished, and then distilling the organic phase to obtain a finished product of the isopropylhydrazine; the catalyst used in reaction is sodium tripolyphosphate. Compared with the prior art, the synthesis method provided by the invention has the beneficial effects that the isopropyl alcohol and the hydrazine hydrate are adopted as raw materials to synthesize the isopropylhydrazine by a one-step method, the reaction steps are fewer, the aftertreatment is simple, the reaction dangerousness is low, the yield is high, the production cost is low, and the emission of wastes isless, so that the synthesis method is a green and environmental-friendly type production process.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a synthesis method of isopropylhydrazine. Background technique [0002] Isopropylhydrazine is a widely used pharmaceutical intermediate and organic synthesis intermediate with excellent biological and chemical activity. Isopropylhydrazine itself is also a commonly used anti-tuberculosis drug and antidepressant, and it is also the starting material of the highly effective insecticide Mileol. [0003] According to literature reports, isopropylhydrazine can be prepared by reacting isopropane bromide with a large amount of excess hydrazine hydrate, and after treatment, use a large amount of continuous extraction with ether. However, due to the high solubility of the product in hydrazine hydrate, the extraction is difficult, the post-treatment time is long, and the yield is low, it is not suitable for large-scale production. And another kind of method for prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C241/02C07C243/14
CPCC07C241/02C07C243/14
Inventor 不公告发明人
Owner 重庆丽澄环保科技有限公司
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