阅读说明：本技术 一种氢化钠生产新工艺 (New process for producing sodium hydride ) 是由 郑志浩 杨彬 张顺利 于 2018-08-28 设计创作，主要内容包括：本发明公开了一种氢化钠生产新工艺,其包括步骤：S1、在惰性气氛中将金属钠分散在氯化钠中,形成混合反应物,加入表面活性剂；S2、过滤去除不熔性杂质并升温至150～350℃；S3、将纯度高于99.9％的氢气升温至200～350℃；S4、将金属钠熔体、氢气同时通入雾化喷头,雾化喷头设于密闭的反应器的上部,氢气通入雾化喷头的内通道和外通道,金属钠熔体通入雾化喷头的中间通道；在雾化喷头的喷口的外部空间,氢气和雾化的金属钠雾滴快速反应生成氢化钠。本发明在惰性盐氯化钠中,钠与氢气通过喷射的方式快速反应生成氢化钠,反应过程简单,易于操作,反应产物氢化钠纯度高,可达99％以上。(The invention discloses a new process for producing sodium hydride, which comprises the following steps: s1, dispersing metal sodium in sodium chloride in an inert atmosphere to form a mixed reactant, and adding a surfactant; s2, filtering to remove infusible impurities and heating to 150-350 ℃; s3, heating hydrogen with the purity higher than 99.9% to 200-350 ℃; s4, simultaneously introducing the sodium metal melt and hydrogen into an atomizing nozzle, wherein the atomizing nozzle is arranged at the upper part of the closed reactor, the hydrogen is introduced into an inner channel and an outer channel of the atomizing nozzle, and the sodium metal melt is introduced into a middle channel of the atomizing nozzle; in the outer space of the nozzle of the atomizing nozzle, hydrogen and atomized metal sodium fog drops react rapidly to generate sodium hydride. In the inert salt sodium chloride, sodium and hydrogen rapidly react to generate sodium hydride in a spraying mode, the reaction process is simple and easy to operate, and the purity of the reaction product sodium hydride is high and can reach more than 99%.)

1. A new process for producing sodium hydride is characterized by comprising the following steps:

s1, dispersing the metal sodium in the sodium chloride in an inert atmosphere to form a mixed reactant, and adding the surfactant. S2, filtering to remove infusible impurities and heating to 150-350 ℃;

s3, heating hydrogen with the purity higher than 99.9% to 200-350 ℃;

s4, simultaneously introducing the sodium metal melt and hydrogen into an atomizing nozzle, wherein the atomizing nozzle is arranged at the upper part of the closed reactor, the hydrogen is introduced into an inner channel and an outer channel of the atomizing nozzle, and the sodium metal melt is introduced into a middle channel of the atomizing nozzle; in the outer space of the nozzle of the atomizing nozzle, hydrogen and atomized metal sodium fog drops react rapidly to generate sodium hydride.

2. The novel process for producing sodium hydride according to claim 1, wherein the inert atmosphere in step S1 is nitrogen, helium, argon, or a combination thereof.

3. The method of claim 1, wherein the concentration of sodium metal in the mixed reactant of step S1 is 30-50 g/L.

Technical Field

The invention relates to a new process for producing sodium hydride.

Background

Sodium hydride, chemical formula NaH, is an inorganic salt. In organic synthesis, sodium hydride is mainly used as a strong base. Sodium hydride is insoluble in organic solvents and soluble in molten metal sodium, so almost all of the reactions associated with sodium hydride occur on solid surfaces. Sodium hydride is widely used in pharmaceutical industry, chemical industry and building material industry, for example, is used for producing ciprofloxacin, is used for preparing cement water reducing agent, is used for producing sodium borohydride and the like, and therefore the market is large. The existing preparation reaction of sodium hydride has high requirement on the concentration of sodium, and the prepared sodium hydride can be dissolved in molten metal sodium, so that a complicated process is needed for removing the metal sodium.

Disclosure of Invention

The invention aims to solve the technical problem of providing a new process for producing sodium hydride.

In order to solve the technical problems, the invention provides the following technical scheme:

a new process for producing sodium hydride, which comprises the following steps:

s1, dispersing the metal sodium in the sodium chloride in an inert atmosphere to form a mixed reactant, and adding the surfactant. S2, filtering to remove infusible impurities and heating to 150-350 ℃;

s3, heating hydrogen with the purity higher than 99.9% to 200-350 ℃;

s4, simultaneously introducing the sodium metal melt and hydrogen into an atomizing nozzle, wherein the atomizing nozzle is arranged at the upper part of the closed reactor, the hydrogen is introduced into an inner channel and an outer channel of the atomizing nozzle, and the sodium metal melt is introduced into a middle channel of the atomizing nozzle; in the outer space of the nozzle of the atomizing nozzle, hydrogen and atomized metal sodium fog drops react rapidly to generate sodium hydride.

Further, the inert atmosphere in step S1 is nitrogen, helium, argon, or a combination thereof.

Further, the concentration of the metallic sodium in the mixed reactant of the step S1 is 30-50 g/L.

The invention has the following beneficial effects:

in the inert salt sodium chloride, sodium and hydrogen rapidly react to generate sodium hydride in a spraying mode, the reaction process is simple and easy to operate, the purity of the reaction product sodium hydride is high and can reach more than 99%, the final product is sodium hydride with dispersed sodium chloride, a medium and the product do not need to be separated, the sodium hydride can be directly used for subsequent use of the sodium hydride, and the inert medium does not participate in the reaction. The invention solves the problem that sodium hydride is polluted by organic solvent in the traditional process.

Detailed Description

The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is in no way intended to limit the invention.