Determination method of active deuterium content of lithium aluminum deuteride

Abstract

The invention discloses a determination method of the active deuterium content of lithium aluminum deuteride. The determination method comprises the following steps: assembling a constant-pressure gas volume measuring instrument by using an upper comb-shaped tube, graduated tubes, a conical flask, a constant-pressure device, a constant-pressure funnel and a lower comb-shaped tube; moving the constant-pressure device to ensure that the liquid level of the constant-pressure device the liquid levels of the graduated tubes are at the same level, wherein at the moment, the readings of the graduated tubes are V1; putting the conical flask with the lithium aluminum deuteride into an ice-water bath, and adding a mixed solution of water and a solvent in the constant-pressure funnel into the lithium aluminum deuteride in the conical flask; after a reaction of the lithium aluminum deuteride and water, moving the constant-pressure device to ensure that the liquid level of the constant-pressure device the liquid levels of the graduated tubes are at the same level, wherein at the moment, the readings of the graduated tubes are V2; deducting the readings V1 of the graduated tubes before the reaction from the readings V2 of the graduated tubes after the reaction to obtain the volume of deuterium produced during the reaction of the lithium aluminum deuteride and water, and calculating the active deuterium content of the lithium aluminum deuteride through the volume of the deuterium. By the determination method, operation is simple and convenient and a determination result is scientific and accurate.

Description

technical field [0001] The invention relates to the field of chemical testing, in particular to a method for determining the active deuterium content of lithium aluminum deuteride. Background technique [0002] Lithium aluminum deuteride, molecular formula LiAlD 4 , English name: Lithium aluminum deuteride, CAS: 14128-54-2, molecular weight 41.9, melting point 125 ℃, density 0.736. Deuterium is an isotope of hydrogen, and lithium aluminum deuteride is a special fine chemical product. With the rapid development of my country's economy, the demand for lithium aluminum deuteride is increasing day by day. LiAlD 4 Synthesis has high technical content and large profit margins. However, problems such as high temperature, flammability, and explosion are involved in the production process, and the control requirements for process parameters are very strict. Therefore, domestic research and development is in a blank stage. [0003] At present, the assay method of the purity of lith...

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Problems solved by technology

[0003] At present, the assay method of the purity of lithium aluminum hydride is to measure according to the active hydrogen content, but there is no corresponding public literature on the assay method of the purity of lithium aluminum hydride, and because the activity of deuterium is stronger than that of hydrogen, the test reaction is more violent, so a design A reasonable and easy-to-realize method for measuring the purity of lithium aluminum deuteride has practical significance

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