CN103145582B - Concentration method of 40% methylhydrazine aqueous solution - Google Patents
Concentration method of 40% methylhydrazine aqueous solution Download PDFInfo
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- CN103145582B CN103145582B CN201310077319.XA CN201310077319A CN103145582B CN 103145582 B CN103145582 B CN 103145582B CN 201310077319 A CN201310077319 A CN 201310077319A CN 103145582 B CN103145582 B CN 103145582B
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- aqueous solution
- methyl hydrazine
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Abstract
The invention discloses a concentration method of a 40% methylhydrazine aqueous solution. The concentration method is characterized by comprising steps of water adsorption and rectification, wherein the water adsorption step serves 95% ethylene glycol as a water absorbent. The concentration method has the advantages of simple technology, convenience in operation, good concentration effect and safe and reliable whole process.
Description
Technical field
The present invention relates to a kind of methyl hydrazine aqueous solution concentration technology, specifically, relate to a kind of mass concentration and be 40% the methyl hydrazine aqueous solution and be concentrated into 98% method.
Background technology
Methyl hydrazine is the important intermediate of more synthetic high-quality agricultural chemicals, medicine, and itself and the oxygenant composition double elements liquid propellant such as nitrogen tetroxide are simultaneously widely used in the supervisory system of space shuttle, spaceship and satellite.The mass concentration of the methyl hydrazine aqueous solution on market is mostly 40% now, and its price is probably 50,000 yuans/ton, and the price of the methyl hydrazine that mass concentration is 98% reaches 400,000 yuans/ton.The concentration technology of methyl hydrazine adopts first layering to go out the methyl hydrazine mode of rectifying more more at present, and in rectifying, methyl hydrazine is subject to high temperature to be easy to blast, causes leakage, causes security incident.Therefore, need a kind of new technical scheme to solve above-mentioned technical problem.
Summary of the invention
The object of this invention is to provide a kind of mass concentration and be 40% the methyl hydrazine aqueous solution and be concentrated into 98% method, the method concentrated effect is good, safe and reliable.
The technical solution used in the present invention is:
Mass concentration is 40% methyl hydrazine aqueous solution concentration method, comprises water suction and rectification step, and the ethylene glycol that described water suction step employing mass concentration is 95% is as water-retaining agent.
Described mass concentration is that 40% the methyl hydrazine aqueous solution and the mass ratio of ethylene glycol are 1:1.
Ethylene glycol after absorption by underpressure distillation after except the reuse of anhydrating.
Advantage of the present invention is: technique is simple, easy to operate, good, the whole process safety of concentrated effect is reliable.
Embodiment
Mass concentration is 40% methyl hydrazine aqueous solution concentration method, first in the methyl hydrazine aqueous solution that is 40% toward 100g mass concentration, adding 100g mass concentration is 95% ethylene glycol, after having absorbed water, carry out rectifying, after rectifying finishes, the methyl hydrazine that is 98% for mass concentration in tower top is that 70% ethylene glycol solution removes the reuse of anhydrating after by underpressure distillation at the bottom of tower.
Claims (2)
1. the methyl hydrazine aqueous solution concentration method that mass concentration is 40%, it is characterized in that: comprise water suction and rectification step, its concrete steps are: in the methyl hydrazine aqueous solution that is first 40% toward mass concentration, adding mass concentration is 95% ethylene glycol, after having absorbed water, carry out rectifying, after rectifying finishes, the methyl hydrazine that is 98% for mass concentration in tower top is 70% ethylene glycol solution at the bottom of tower.
2. the methyl hydrazine aqueous solution concentration method that mass concentration according to claim 1 is 40%, is characterized in that: the methyl hydrazine aqueous solution that described mass concentration is 40% and the mass ratio of ethylene glycol are 1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310077319.XA CN103145582B (en) | 2013-03-12 | 2013-03-12 | Concentration method of 40% methylhydrazine aqueous solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310077319.XA CN103145582B (en) | 2013-03-12 | 2013-03-12 | Concentration method of 40% methylhydrazine aqueous solution |
Publications (2)
| Publication Number | Publication Date |
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| CN103145582A CN103145582A (en) | 2013-06-12 |
| CN103145582B true CN103145582B (en) | 2014-07-16 |
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| CN201310077319.XA Active CN103145582B (en) | 2013-03-12 | 2013-03-12 | Concentration method of 40% methylhydrazine aqueous solution |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104628593B (en) * | 2015-02-03 | 2016-07-06 | 西安近代化学研究所 | A kind of method preparing high-purity methyl hydrazine |
| CN105315172B (en) * | 2015-12-07 | 2017-06-23 | 济南大学 | A kind of new technology of separation water-methyl hydrazine azeotropic mixture |
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2013
- 2013-03-12 CN CN201310077319.XA patent/CN103145582B/en active Active
Non-Patent Citations (4)
| Title |
|---|
| 一甲基肼的合成方法及应用;王美玲等;《化工之友》;20071231(第17期);第46页 * |
| 一甲肼的合成与应用;张志强;《青海科技》;20050131(第1期);第47-48页 * |
| 张志强.一甲肼的合成与应用.《青海科技》.2005,(第1期), |
| 王美玲等.一甲基肼的合成方法及应用.《化工之友》.2007,(第17期), |
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| CN103145582A (en) | 2013-06-12 |
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