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Method for improving dissolving degree of paclobutrazol in triazole plant growth regulator

A plant growth regulator, paclobutrazol technology, applied in the direction of organic chemistry, organic chemistry, etc., can solve the problems of wasting drugs, paclobutrazol content is not up to the standard, not easy to dissolve, etc., to reduce the possibility, stable and controllable drug effect, Effect of High Solubility Values

Inactive Publication Date: 2018-10-23
王新民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Studies have found that the solubility of paclobutrazol in water at 25°C is lower than 0.01mg / ml, and it is not easy to dissolve during spraying, and part of it precipitates at the bottom of the water, which not only wastes drugs but also fails to reach the pre-designed content, resulting in the dissolved paclobutrazol The content is not up to standard

Method used

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  • Method for improving dissolving degree of paclobutrazol in triazole plant growth regulator
  • Method for improving dissolving degree of paclobutrazol in triazole plant growth regulator
  • Method for improving dissolving degree of paclobutrazol in triazole plant growth regulator

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Embodiment 1

[0027] Embodiment 1: a kind of paclobutrazol benzoic acid co-crystal, it is prepared by the following method:

[0028] (1) Formation of paclobutrazol solution: get paclobutrazol, add isopropanol, ultrasonically dissolve, obtain paclobutrazol solution; by mass, the consumption ratio of paclobutrazol and isopropanol is 1: 3;

[0029] (2) Formation of benzoic acid solution: get benzoic acid, add water, ultrasonic dispersion, obtain benzoic acid aqueous solution; By mass, the consumption ratio of benzoic acid and water is 1: 8;

[0030] (3) Formation of paclobutrazol benzoic acid co-crystal: in paclobutrazol solution, drip benzoic acid aqueous solution, stir reaction at room temperature, first separate out solid and dissolve again, filter after reacting 1.5hr and get filtrate, filtrate and ethanol are mixed to obtain mixed solution, mix The solution was evaporated at 40°C to remove the solvent to obtain the paclobutrazol benzoic acid co-crystal; the mole ratio of paclobutrazol and...

Embodiment 2

[0031] Embodiment 2: a kind of paclobutrazol benzoic acid co-crystal, it is prepared by the following method:

[0032] (1) Formation of paclobutrazol solution: get paclobutrazol, add n-propanol, and ultrasonically dissolve to obtain paclobutrazol solution; by mass, the consumption ratio of paclobutrazol and n-propanol is 1:5;

[0033] (2) Formation of benzoic acid solution: get benzoic acid, add water, ultrasonic dispersion, obtain benzoic acid aqueous solution; By mass, the consumption ratio of benzoic acid and water is 1: 10;

[0034] (3) Formation of paclobutrazol benzoic acid co-crystal: in paclobutrazol solution, drip benzoic acid aqueous solution, stir reaction at room temperature, first separate out solid and dissolve again, filter after reaction 2hr and get filtrate, filtrate and ethanol are mixed to obtain mixed solution, mixed solution The solvent was removed by rotary evaporation at 45° C. to obtain the paclobutrazol benzoic acid co-crystal; the mole ratio of paclob...

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Abstract

The invention discloses a method for improving dissolving degree of paclobutrazol in a triazole plant growth regulator. The method is characterized in that the paclobutrazol is prepared into a paclobutrazol benzoic acid eutectic crystal; the paclobutrazol benzoic acid eutectic crystal is a monoclinic crystal system, the axis length a is 6.1734 , the axis length b is 12.3459 , the axis length c is15.2132, the axis angle alpha=gamma is 90 degrees, and the axis angle beta is 100 degrees. The method has the advantage that the dissolving degree is improved.

Description

technical field [0001] The invention relates to a method for improving the solubility of paclobutrazol, a triazole plant growth regulator. Background technique [0002] The chemical name of paclobutrazol (Propiconazole) is (2RS, 3RS)-1-(4-chlorophenyl)-4,4-dimethyl-2-(1H-1,2,4-triazol-1-yl) Pent-3-ol, which is a triazole plant growth regulator and an inhibitor of endogenous gibberellin synthesis, has the functions of delaying plant growth, inhibiting stem elongation, shortening internodes, promoting plant tillering, and promoting flower bud differentiation. Increase plant stress resistance, increase yield and other effects. This product is suitable for rice, wheat, peanuts, fruit trees, tobacco, rapeseed, soybeans, flowers, lawns and other crops (plants), and the use effect is remarkable. [0003] Studies have found that the solubility of paclobutrazol in water at 25°C is lower than 0.01mg / ml, and it is not easy to dissolve when spraying, and part of it settles at the bott...

Claims

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Application Information

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IPC IPC(8): C07D249/12C07C63/06
CPCC07B2200/13C07C63/06C07D249/12
Inventor 王新民
Owner 王新民