Method for recovering glycine acid-binding agent triethylamine employing triethylamine method

A technology of triethylamine method and triethylamine hydrochloride, applied in chemical instruments and methods, preparation of amino compounds, preparation of organic compounds, etc., can solve problems such as inability to produce industrial-grade calcium chloride products

Inactive Publication Date: 2014-01-22
刘长飞
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Problems solved by technology

The calcium chloride solution after recovering triethylamine is a yellow viscous liquid, which cannot produce qualified industrial grade calcium chloride products

Method used

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Embodiment Construction

[0025] The invention is further illustrated by the following non-limiting examples. Example:

[0026] Get 500 grams of triethylamine hydrochloride synthesized by triethylamine method glycine, wash and filter with 100ml water, and the triethylamine hydrochloride after washing and filtering is added to the aqueous solution of 800ml for dissolving. Add calcium hydroxide powder in batches to the aqueous solution, start the stirrer, and stop adding when the pH value of the solution reaches 11.5. After standing still for 60 minutes, the crude triethylamine separated from above was separated to obtain 310 grams of crude triethylamine. The water content of the crude triethylamine was detected to be 5.1% (W / W). The crude product triethylamine was added into a beaker added with 2 grams of calcium oxide powder, stirred for 10 minutes, and left to stand for 6 hours. The above triethylamine was separated to obtain triethylamine with a water content of 0.27% (W / W).

[0027] Isolate the r...

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Abstract

The invention provides a production technology of recovering a glycine acid-binding agent triethylamine employing a triethylamine method. An industrial calcium chloride product can be coproduced. The production technology comprises the following steps: washing a triethylamine hydrochloride crystalline solid by using an aqueous solution to remove impurities; dissolving the washed triethylamine hydrochloride crystal into water; adding calcium hydroxide or calcium oxide, adjusting the PH value to 10-12, so as to obtain a calcium chloride layered solution with a triethylamine layer; separating out a crude product triethylamine, and dewatering and standing to obtain qualified triethylamine; pumping a calcium chloride solution into an evaporation device for evaporation concentration, and recycling condensate containing triethylamine to dissolve washed triethylamine hydrochloride; adjusting the PH value of the residual calcium chloride solution to 7.5-9 with hydrochloric acid, and then feeding to an evaporator to evaporate; cooling and crystallizing, filtering and drying at about 200 DEG C, so as to obtain a calcium chloride dihydrate product; adding concentrated sulfuric acid and urea to a washing solution to process, so as to respectively obtain calcium sulfate, hydrochloric acid and a chemical fertilizer material product.

Description

technical field [0001] The invention relates to a production process for recovering acid-binding agent triethylamine from glycine by a triethylamine method, and belongs to the technical field of chemical production. Background technique [0002] Glycine is an important raw material for products such as glyphosate and glycine ethyl ester hydrochloride, and it can also be refined into food-grade glycine for use. Triethylamine method glycine is a new process for the production of glycine, the main process is as follows: Add solvent methanol and catalyst to the reactor for glycine synthesis, then add solid ammonium chloroacetate, raise the temperature to 60°C and start adding triethylamine, within one and a half hours After the addition of triethylamine, the reaction was incubated for two and a half hours until the pH value was 7.0-7.5. The glycine and triethylamine hydrochloride were separated by hot filtration, cooling and freezing respectively. When recovering triethylamine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/05C07C209/86C07C209/00C01F11/30C01F11/32C01F11/28C01F11/46C01B7/03
Inventor 刘长飞付德才李志伟王云鹤
Owner 刘长飞
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