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Method for detecting content of degrading impurities in alcohol magnesium compound

A compound, magnesium alkoxide technology, applied in the detection field of degraded impurities in magnesium alkoxide, can solve the problems of low efficiency, inaccurate test results, high cost, etc., to save time, save the cost of purchasing samples, and improve the efficiency of research and development.

Inactive Publication Date: 2018-02-27
CHANGZHOU HEQUAN PHARMA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for detecting the content of degraded impurities in magnesium alkoxide compounds, which can overcome the shortcomings of inaccurate detection results, high cost, and low efficiency in the prior art

Method used

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specific Embodiment

[0029] Detect the quality of a certain batch of magnesium ethylate: take 2 samples, the quality of magnesium ethylate added in the titration cup is 0.20294g and 0.20161g respectively, and the moisture content read out from the Karl Fischer instrument software is 1.45% and 1.56% respectively. Substituting the two water content distributions into the above formula, the impurity contents in the magnesium ethoxide are respectively: 2.35% and 2.53%. Get the mean value of two parts of impurity content, obtain the impurity content (calculated as magnesium hydroxide) in this batch of magnesium ethoxide to be 2.44%.

[0030] The COA of the supplier magnesium ethoxide shows that the content of magnesium ethoxide is above 98.5%, while the measured impurity content is 2.44%, thus judging that this batch of magnesium ethoxide is unqualified.

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Abstract

The invention discloses a method for detecting degrading impurities in an alcohol magnesium compound. The method comprises the following steps of S1, adding enough methyl alcohol into a titration cupof a KF (Karl-Fischer) type titration instrument, covering an electrode, titrating a KF titration agent to a potential terminal point, and enabling water to be completely consumed; S2, continuing to add excessive glacial acetic acid into the titration cup; after the instrument is stable, precisely weighing a proper amount of alcohol magnesium compound, adding into the titration cup, and reacting;S3, after reaction is finished, titrating the KF titration agent to the potential terminal point, and enabling water to be completely consumed. Compared with the method for detecting the titrated magnesium element in the prior art, the detection method has the advantages that the content of degrading impurities in the alcohol magnesium compound can be more accurately detected; compared with the detection method using miniature test means to judge whether the raw material is qualified or not, a large amount of time is shortened, the reagent cost is reduced, and the whole research and development efficiency is improved.

Description

technical field [0001] The invention relates to the field of impurity analysis and detection of chemical reagents, in particular to a detection method for degraded impurities in magnesium alkoxide. Background technique [0002] Magnesium alcohol compound Mg(OR) 2 , where R is an alkyl group, is a class of metal alkoxide compounds, and its representative compounds include magnesium methoxide, magnesium ethoxide, magnesium isopropoxide, magnesium n-propoxide, etc. These above-mentioned magnesium alcohol compounds are widely used in inorganic synthesis, organic synthesis, directional catalytic polymerization and preparation of functional materials, etc., and are important chemical raw materials and reagents. At present, domestic literature reports on magnesium alcohol compounds mainly focus on synthesis, preparation and purification, and there are few literature reports on the determination of related impurities in magnesium alcohol compounds. However, during storage and tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/44
CPCG01N27/44
Inventor 李建强蒋竞赵初芒
Owner CHANGZHOU HEQUAN PHARMA CO LTD