Synthesis of high-purity mepiquat chloride serving as plant growth regulator with one-step method
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A technology for plant growth regulators and dibenzylamines, which is applied in the directions of plant growth regulators, plant growth regulators, biocides, etc., can solve the problems of low purity of dibenzylamines, and achieves high purity, simple process operation and economical cost. low effect
Inactive Publication Date: 2012-07-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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[0007] Aiming at the current one-step synthesis of metropic amine, the problem of low purity of metropic amine, the present invention proposes a synthesis process for one-step synthesis of high-p...
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Embodiment 1
[0017] Get 0.85kg hexahydropyridine and dissolve in 9.26kg ethanol, add 1.38kg K 2 CO 3 , after stirring at room temperature for 0.5h, add 1.06kg of methyl chloride (5% excess), react at room temperature for 6h; filter the reaction system to obtain KHCO 3 And benzederine ethanol system, KHCO 3 K is obtained by calcination 2 CO 3 , K 2 CO 3 Recycling; 1.47kg of high-purity benzyl amine is obtained by removing ethanol from the ethanol system of benzedral amine, and ethanol can be recycled.
Embodiment 2
[0019] Get 0.85kg hexahydropyridine and dissolve in 9.26kg ethanol, add 1.38kg K 2 CO 3 , after stirring at room temperature for 0.5h, add chloromethane 111kg (excess 10%), react at room temperature for 4.5h; filter the reaction system to obtain KHCO 3 And benzederine ethanol system, KHCO 3 K is obtained by calcination 2 CO 3 , K 2 CO 3 Recycling; 1.48kg of high-purity benzyl amine is obtained by removing ethanol from the ethanol system of benzedral amine, and ethanol can be recycled.
Embodiment 3
[0021] Get 0.85kg hexahydropyridine and dissolve in 9.26kg ethanol, add 1.38kg K 2 CO 3 , after stirring at room temperature for 0.5h, add 1.21kg of methyl chloride (over 20%), react at room temperature for 3h; filter the reaction system to obtain KHCO 3 And benzederine ethanol system, KHCO 3 K is obtained by calcination 2 CO 3 , K 2 CO 3 Recycling; 1.48kg of high-purity benzyl amine is obtained by removing ethanol from the ethanol system of benzedral amine, and ethanol can be recycled.
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Abstract
The invention relates to a synthesis method of mepiquat chloride serving as a plant growth regulator, in particular to a method for synthesizing high-purity mepiquat chloride serving as a plant growth regulator with a one-step method. A process of the method comprises the following steps of: (1) dissolving a certain amount of hexahydropyridine into ethanol, and adding a certain amount of K2CO3; (2) adding methyl chloride into a system, wherein the weight ratio of the methyl chloride to the hexahydropyridine is 2:1-2.2:1; (3) filtering the system reacted in the step (2) to obtain KHCO3 and a mepiquat chloride system respectively, calcining the KHCO3 to obtain K2HCO3, and recycling the K2HCO3; and (4) removing ethanol from the mepiquat chloride system by evaporating to obtain high-purity mepiquat chloride, wherein the ethanol can be recycled. According to the method, high-purity mepiquat chloride can be synthesized with the one-step method, and the used K2CO3 and ethanol can be recycled. The process is easy to operate, is economical, has low cost and high mepiquat chloride purity, and can hopefully become a novel process for synthesizing high-purity mepiquat chloride serving as the plant growth regulator with the one-step method.
Description
technical field [0001] The invention relates to a method for synthesizing a plant growth regulator, especially, the invention relates to a method for synthesizing a high-purity plant growth regulator, a metramine, in one step. Background technique [0002] Mepiquat is a new type of plant growth regulator, which has a good systemic conduction effect on plants. It can promote the reproductive growth of plants, inhibit the crazy growth of stems and leaves, control side branches, shape the ideal plant shape, increase the number and vitality of the root system, increase the weight of the fruit, and improve the quality. Widely used in cotton, wheat, rice, peanuts, corn, potatoes, grapes, vegetables, beans, flowers and other crops. Metramine is a systemic drug with high efficiency, low toxicity and no harm. According to the dosage and different growth stages of plants, spraying mepipebylamine can regulate plant growth, make plants firm and lodging resistant, improve color and inc...
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