2 results about "Ethylamine" patented technology

The invention relates to a method for determining content of triethylamine salt. The method is processed according to the following steps of: 1) accurately weighing a sample containing triethylamine salt, evenly shaking in a separating funnel containing water, adding methyl red indicating liquid; 2) dropwise adding a sodium hydroxide solution while adding until a proper amount of solution is dropwise added after the solution becomes yellow; 3) adding an organic solvent to vibrate and deflate; 4) standing and layering, and then separating liquid and collecting extract solution; 5) accurately absorbing a part of collected extract solution, adding to a triangular flask containing a polar solvent, and then adding the methyl red indicating liquid; 6) adding standard acid liquid into the solution to perform titration operation until the solution becomes orange red from yellow; and 7) calculating the content of the triethylamine salt in the sample. By adopting the method, the content of the triethylamine salt in the sample can be rapidly detected in real time, and the method has the advantages of being simple and convenient to operate, high in accuracy, good in precision, low in analysis cost and the like.

The invention discloses a synthetic method of N-ethyl ethylenediamine. The method comprises the steps of reacting an ethylamine water solution and cyclohexylamine under the effect of a catalyst in a sealed high-pressure reaction kettle, wherein the reaction temperature is 30-100 DEG C; the reaction time is 2-12 hours; the reaction pressure is 5-30 kg; filtering a reaction liquid, and distilling at reduced pressure, so as to obtain the N-ethyl ethylenediamine. By adopting the method, the problems of environmental pollution, difficult purification of the product, high cost and the like in the traditional bromoethane method are avoided; and the byproduct obtained by reaction is fewer, easy to purify, high in yield and low in production cost.