Preparation method of pesticide effervescent tablet

An effervescent tablet and pesticide technology, which is applied in the field of preparation of effervescent pesticide tablets, can solve the problems of poor surface ductility of crops, low suspension rate of pesticides, and affecting the utilization rate of pesticides, etc. Conducive to environmental protection and easy operation

Active Publication Date: 2011-04-06
JIANGSU SEVENCONTINENT GREEN CHEM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the pesticide effervescent tablet requires the use of organic solvents, the preparation process is cumbersome, and after the pesticide effervescent tablet disintegrates, the suspension rate of the pestic

Method used

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  • Preparation method of pesticide effervescent tablet
  • Preparation method of pesticide effervescent tablet

Examples

Experimental program
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Effect test

Embodiment 1

[0020] The present embodiment provides a kind of preparation method of 25% tebuconazole effervescent tablet (25% represents the mass percentage composition of tebuconazole in the effervescent tablet), comprises the steps:

[0021] (1) Mix 14 parts by weight of clay with 25 parts by weight of tebuconazole, freeze and pulverize at -20°C to the nanometer level, pass through a 1200-mesh standard sieve to obtain 39 parts by weight of the nanocarrier tebuconazole;

[0022] (2), 39 parts by weight of nano-carrier tebuconazole and 15 parts of dry fumaric acid, 26 parts of sodium bicarbonate, 5 parts of sodium alkylnaphthalene formaldehyde sulfonate, 4 parts of sodium tripolyphosphate, 2 parts of sodium lauryl sulfate Parts, 3 parts of trisiloxane polyether, 1 part of crospovidone, 5 parts of magnesium stearate premixed, coarsely crushed, remixed, pulverized by a jet mill, and the pulverized material was added to the cone mixer Mixed, 100% of the mixed material passed through a 300-mes...

Embodiment 2

[0025] The present embodiment provides a kind of preparation method of 16% tebuconazole effervescent tablet, comprises the steps:

[0026] (1) 8 parts by weight of kaolin and 16 parts by weight of tebuconazole were mixed, frozen and pulverized at -20°C to the nanometer level, and 24 parts by weight of the nano-carrier tebuconazole was obtained through a 1200-mesh standard sieve;

[0027] (2), with 24 weight parts of nano-carrier tebuconazoles of step (1) gained and 25 weight parts of dry tartaric acid, 25 weight parts of sodium bicarbonate, 5 weight parts of low-substituted hydroxypropyl cellulose, sodium lignosulfonate 6 parts by weight, 4 parts by weight of sodium tripolyphosphate, 5 parts by weight of sodium alkylnaphthalene sulfonate, 6 parts by weight of talcum powder premixed, coarsely crushed, remixed, pulverized by a jet mill, and the pulverized material is added to the conical Mix in the mixer, make 100% of the mixture pass through a 300-mesh standard sieve to obtain ...

Embodiment 3

[0030] The present embodiment provides a kind of preparation method of 50% tebuconazole effervescent tablet, and it comprises the steps:

[0031] (1), 3 parts of cornstarch and 50 parts by weight of tebuconazole were frozen and pulverized at -20°C to the nanometer level, and 53 parts by weight of the nano-carrier tebuconazole was obtained through a 1200-mesh standard sieve;

[0032] (2), with 53 weight parts of nano-carrier tebuconazole of step (1) gained and dry fumaric acid 19 weight parts, sodium carbonate 15 weight parts, alkylphenol polyoxyethylene ether formaldehyde condensate sodium sulfate 3 weight Parts, 1 part by weight of alkyl aryl polyoxyethylene ether, 4 parts by weight of sodium tripolyphosphate, 5 parts by weight of sodium lauryl sulfate premixed, coarsely pulverized, remixed, pulverized by a jet mill, and the pulverized material was added Mix in the conical mixer, make 100% of the mixed material pass through a 300-mesh standard sieve to obtain dry powder;

[...

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Abstract

The invention relates to a preparation method of a pesticide effervescent tablet, comprising the following steps of: (1) with one or the combination of more of bentonite, diatomite, white carbon black, maize starch, white clay, kaolin, superfine silica gel powder and aluminum-magnesium silicate as a carrier, mixing the mixture with pesticide raw materials, freezing at -10DEG C and crushing to obtain the nano carrier pesticide; (2) premixing the nano carrier pesticide with the dried acid source substances, a carbon dioxide source, a caking agent, a wetting dispersant, a disintegrating agent and a lubricating agent, roughly crushing and mixing, crushing by a jet pulverizer and then adding the crushed materials in a conical mixer blender and mixing to allow the materials to completely pass through a standard sieve with over 300 meshes to obtain dry powder; and (3) pressing the dry powder into a tablet with the preset size by using a tablet compression machine in the environment that the temperature is 15-25DEG C and the humidity is below 40 percent, i.e. obtaining the pesticide effervescent tablet. The method is simple, low in cost and environmentally-friendly; and the pesticide effect and the utilization rate of the pesticide of the pesticide effervescent tablet are superior to those of the conventional aqueous emulsion.

Description

technical field [0001] The invention belongs to the field of pesticide processing, in particular to a method for preparing a pesticide effervescent tablet. Background technique [0002] At present, commonly used pesticide formulations include emulsifiable concentrate, suspension concentrate, wettable powder, powder, granule, water, poison bait, mother liquor, mother powder, etc. Most of the pesticide varieties are sold in the market in these dosage forms. Among these pesticide formulations, pesticide emulsifiable concentrates contain organic solvents, are flammable, and are not environmentally friendly. Fire prevention and leakage prevention must be strictly required during production and transportation. After the suspension is used, there are many residues in the packaging container, the container is difficult to handle, and it is easy to stratify, agglomerate, and easily deteriorate during storage. Wettable powders and water-dispersible granules occupy a large volume and...

Claims

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Application Information

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IPC IPC(8): A01N25/34A01N43/653A01P3/00
CPCA01N25/34
Inventor 陶亚春胡荣祁鸣蔡军义
Owner JIANGSU SEVENCONTINENT GREEN CHEM CO LTD
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