Paraquat solid preparation and preparation method thereof

A technology for solid preparation and paraquat, applied in the field of solid preparation of paraquat and its preparation, can solve the problems of no registration and production of paraquat solid preparation, low feasibility of industrialization, increased possibility of inhalation, etc. Safety risks, ease of recycling, reduction of possible effects of inhalation

Active Publication Date: 2013-04-24
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology mainly adopts the method of decompression and heating and drying to remove the water content of paraquat dichloride salt solution. The process is complicated, the requirements for equipment are high, and the energy consumption is high.
In addition, this process needs to pulverize the prepared paraquat technical, which is easy to generate a large amount of paraquat dust, which increases the possibility of inhalation and poses a safety risk
Due to the complex process and low industrial feasibility, this technology is difficult to realize. This can be proved by the fact that there has been no registration and production of paraquat solid preparations in the past 10 years since the patent was published.

Method used

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  • Paraquat solid preparation and preparation method thereof
  • Paraquat solid preparation and preparation method thereof
  • Paraquat solid preparation and preparation method thereof

Examples

Experimental program
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Effect test

manufacture example 1

[0046] Production Example 1 of Technical Drug: Production of Concentrated Liquid Paraquat Formulation

[0047] Take 50g of 30% paraquat solution, add 80g of 4A molecular sieve, stir and let it stand for half an hour, filter and remove the molecular sieve to obtain 32.3g of filtrate, which is detected as 47% paraquat concentrate. Molecular sieves are reused after being dried. The filtrate was separated to obtain a paraquat crystalline wet product, and its content was detected to be 61.5%.

manufacture example 2

[0048] Production Example 2 of Active Drug: Production of Concentrated Liquid Paraquat Formulation

[0049] Take 100g of 30% paraquat solution, concentrate under reduced pressure, remove part of the water, add 10g of polymer water-absorbing resin, stir and let it stand for half an hour, filter and remove the polymer water-absorbing resin, the filtrate is 64.6g, and its content is 47 % paraquat concentrate. The polymer water-absorbent resin is reused after being dried. The filtrate was separated to obtain a paraquat crystalline wet product, and its content was detected to be 61.5%.

Embodiment 1

[0051] This example is to prepare 12% paraquat water dispersible granules

[0052] Formula: 33.3g of 30% paraquat solution, 10g of adsorbent white carbon black, 20g of starch, 7g of sodium alkylsulfonate, 1.8g of sodium lignin, 3.5g of ammonium sulfate, 0.05g of aminopropyl triazolylpyrimidinone, 4,4'-bipyridine 0.03g, make up to 100g with kaolin. Preparation: Mix white carbon black and add it to the paraquat solution and stir evenly, then add the pre-crushed filler kaolin, ammonium sulfate, emetic aminopropyl triazolyl pyrimidinone, and odorant 4,4'-bipyridine and surfactant sodium alkylsulfonic acid, sodium lignin and starch, mixed evenly, and then granulated.

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PUM

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Abstract

The invention provides a paraquat solid preparation and a preparation method thereof. The dosage form comprises paraquat salt solution, adsorbents, surfactants and fillers. The solid preparation is prepared by adsorbing the paraquat solution with the solid adsorbents, then adding the ground fillers to prepare a solid and then adding the surfactants, nauseants and other adjuvants. Further, the preparation method comprises the steps of improving the concentration of the paraquat solution and reducing the moisture via water absorbing treating agents and then preparing the solid preparation according to the above method.

Description

technical field [0001] The invention relates to a pesticide dosage form, in particular to a solid preparation of paraquat and a preparation method thereof. technical background [0002] Paraquat is a fast-acting contact non-selective herbicide that can kill plants with chloroplasts. Its active ingredients are extremely destructive to the chloroplast membrane, so that photosynthesis and chloroplast synthesis are quickly suspended. Paraquat can control various annual weeds, and has a strong killing effect on perennial weeds, but other underground stems and roots can sprout new branches, and has no effect on lignified stems and trunks. It is used to control weeds in fruit trees, mulberry trees, rubber gardens and forest belts. It can also be used to control weeds in cultivated land, field ridges, and roadsides. For wide-row crops such as corn, sugarcane, soybeans, and nurseries, directional spraying can be used to control weeds. [0003] Paraquat chemical name: 1-1-dimethyl-4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/40A01N25/08A01P13/00
CPCA01N43/40A01N25/08
Inventor 王伟周曙光钱志刚秦龙黄海燕杨旭陈根良
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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