CN103766346B - Containing the water-dispersible granules and preparation method thereof of paraquat dichloride - Google Patents
Containing the water-dispersible granules and preparation method thereof of paraquat dichloride Download PDFInfo
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Abstract
The invention provides a kind of water-dispersible granules containing paraquat dichloride and preparation method thereof.The composition of this granule comprises paraquat dichloride, moisture, humectant, and one or more are selected from the interpolation auxiliary agent of surfactant, adhesive, anticaking agent, emetic, pigment and insoluble filler.Owing to there is a certain amount of moisture in water-dispersible granules of the present invention, avoid when granula processing uses and produce dust, greatly improve processing and safety in utilization.Its preparation method is uniformly mixed into fused solution or pasty material when high-temperature fusion is liquid with other component after paraquat mother liquor quantitatively dewaters, and then carries out molten atomizing cooling granulation or cooling granulation of whitewashing.
Description
Technical field
The present invention relates to pesticide field, in particular to a kind of water-dispersible granules containing paraquat dichloride and preparation method thereof.
Background technology
Paraquat is a kind of quick-acting contact killing type nonselective herbicide, effectively can kill the plant containing chloroplast, various 1 year or perennial weed can be prevented and kill off, be widely used in preventing and kill off the weeds in fruit tree, mulberry tree, plantation and forest belt, also can be used for the weeds of preventing and kill off arable land ridge, roadside, pave floor with bricks, stones etc. slope, to wide row long-term cropping, directed spraying management of weeds can be taked, weeding also extensive use before seedling when no-tillage field crop is changed crops.Its chemical name is 1-1-dimethyl-4-4-bipyridine cation salt, and its structural formula is as follows:
Paraquat has broad weed-killing spectrum, permeability is strong, onset speed fast, root is not hindered in weeding, meet native passivation, cost performance advantages of higher, and its formulation general is at present liquid preparation.Although paraquat has above-mentioned remarkable advantage, whether people are entangled with regard to continuing to use paraquat liquor for a long time, and reason is that paraquat has very strong oral toxicity and toxicity on inhalation to people and animals, and without effective antipoison.In recent years, along with the sharply expansion of paraquat aqua application surface sum scope, China gets more and more because taking the Impulsive suicide poisoning of paraquat aqua, causes showing great attention to of society.
Paraquat liquid preparation easily causes user to eat by mistake and is convenient to impulsion felo-de-se and conveniently takes, it is the leading factor causing this phenomenon, if paraquat is made solid pharmaceutical preparation, and tightly packed, impulsion felo-de-se is made to be difficult to conveniently take in the non-reason gap of extreme, after impulsion moment, most felo-de-se can abandon suicide automatically, then to wrongly take and Suicide poisoning risk of getting excited will reduce greatly, thus reach continuation performance paraquat weeding advantage, greatly reduce production and application and environmental risk simultaneously, reduce the object of carrying cost.Therefore, the exploitation of paraquat solid dosage forms process technology becomes imperative.
Chinese patent application 99119405.5 discloses paraquat solid pharmaceutical preparation and preparation method thereof.This paraquat solid pharmaceutical preparation contains the former medicine of paraquat dichloride powder, surfactant, incremental agent and the composition in nauseant, stink agent, thickener, pigment and antifreezing agent more than any one.Its preparation method is: by paraquat dichloride liquid pressure-reducing distillation dehydration, heat up oven dry again, after pulverizing in proportion with surfactant, incremental agent and in nauseant, stink agent, thickener, pigment and antifreezing agent more than one compositions arbitrary be hybridly prepared into solid or semi-solid paraquat preparation; Or after paraquat dichloride liquid pressure-reducing is dehydrated into thick concentrate with adsorbent, be ground into powder after be hybridly prepared into solid or semi-solid paraquat preparation with more than one compositions arbitrary in surfactant, incremental agent and nauseant, stink agent, thickener, pigment and antifreezing agent in proportion again.
Need drying containing the pressed powder of paraquat in this preparation method, solids mix, the processing process such as pulverizing, production process easily produces the respirable dust containing paraquat, be difficult to avoid dust to spread in environment, thus strengthen practitioner's inhalation poisoning risk and environmental pollution damage, there is huge career safety & health disaster; And do not add desiccant in the product prepared of the method, cause this product that water-soluble bag cannot be used to pack, easily flour dust overflow occurs when causing product to use, user of service directly contacts equivalent risk with product, there is user of service's inhalation poisoning and the poisoning huge potential safety hazard of skin contact.Therefore this technique is difficult to realize in commercial application.
For realizing large-scale industrial production and the application of paraquat solid pharmaceutical preparation product, improve the production of paraquat product, safety in utilization and environmentally friendly property, avoid generation and the diffusion of paraquat dust in production process, fundamentally thoroughly eliminate the occupational health risk of practitioner, the poisoning risk of user and risk of environmental pollution, we are studied paraquat granule and preparation technology thereof.
Summary of the invention
According to an aspect, the invention provides a kind of water-dispersible granules (hereinafter referred to as paraquat water dispersible granules) containing paraquat dichloride, it comprises paraquat dichloride, the moisture of 5-20 % by weight, the humectant of 0.1-5 % by weight of the 10-65 % by weight represented with paraquat cation content, and one or more are selected from the interpolation auxiliary agent of surfactant, adhesive, anticaking agent, emetic, pigment, stink agent and insoluble filler.
According to a specific embodiment, the invention provides a kind of paraquat water dispersible granules be made up of paraquat dichloride, surfactant, adhesive, emetic, stink agent, pigment, moisture, humectant, anticaking agent and filler, wherein the content of each component is as follows, represents with weight percentage:
The content of wherein said paraquat dichloride represents with the form of the content of paraquat cation.
According to another aspect, the invention provides a kind of method preparing described paraquat water dispersible granules, it comprises the following steps:
(1) the paraquat dichloride aqueous solution is dewatered, make its water content be 6-21 % by weight;
(2) at 90-130 DEG C, at preferred 100-120 DEG C, the paraquat dichloride aqueous solution of dehydration is selected under molten state or semisolid the interpolation auxiliary agent Homogeneous phase mixing of surfactant, emetic, pigment, stink agent, anticaking agent, adhesive and filler with humectant and one or more, to obtain molten state or semi-solid mixed material;
(3) in cooling granulation tower, described molten state or semi-solid mixed material are sprayed or whitewash cooling granulation.
According to more on the one hand, the invention provides a kind of packaging product, it comprises paraquat water dispersible granules of the present invention and desiccant particle at water soluble package.
In one embodiment, described desiccant is selected from one or more in copper sulphate, sodium sulphate, magnesium sulfate, calcium chloride, magnesium chloride, calcium sulphate.In one embodiment, the percentage by weight of desiccant and paraquat water dispersible granules is 0.5%-50%.
On the other hand, the invention provides a kind of production method of described packaging product, described method comprises paraquat water dispersible granules of the present invention and desiccant particle Homogeneous phase mixing, and is loaded in water soluble package by the particle of mixing.
In one embodiment, the particle diameter of desiccant particle and paraquat water dispersible granules is close, the moisture fully absorbing paraquat water dispersible granules to make desiccant and may overflow.
Embodiment
The invention provides a kind of paraquat water dispersible granules, it comprises the paraquat dichloride of 10-65 % by weight, the preferably 20-50 % by weight represented with paraquat cation content, the moisture of 5-20 % by weight, preferably 8-18 % by weight, more preferably 10-15 % by weight, the humectant of 0.1-5 % by weight, preferably 0.5-1.5 % by weight, and one or more are selected from the interpolation auxiliary agent of surfactant, adhesive, anticaking agent, emetic, pigment, stink agent and insoluble filler.
In the present invention, surfactant used can be anion surfactant conventional in any pesticide field, non-ionic surface active agent or amphoteric surfactant, it is such as polyoxyethylene nonylphenol ether, OPEO, polyoxyethylene laurel ether, castor oil polyoxyethylene ether, tallow ammonia APEO, oleic acid polyoxyethylene fat, Dodecyl Polyoxyethylene Ether, C12-C15 alkyl glycoside, quaternary amine glucoside, methylate polyoxyethylene fatty acid, azone, octadecyl carboxylic acid betain, hexadecyldimethyl benzyl ammonium aminocarbonyl propyl betain, lauryl imidazoline carboxybetaine, octadecyl amine oxide, lauryl sodium sulfate, dodecyl sodium sulfate, C12-C15 alkyl alcohol ethoxylates sulphate, neopelex, fatty alcohol ethylene oxide adduct sulfonate, oleoyl methyl taurine sodium salt, lignin sulfonic acid sodium salt or sylvite or calcium salt, one or more in polycarboxylate sodium or sylvite.With the total weight of paraquat water dispersible granules, the consumption of surfactant can be 1-20%, preferred 1-10%.
In the present invention, humectant used can be humectant conventional in any pesticide field, such as be selected from polyalcohol, such as, in glycerine, propane diols, 1,3-BDO, sorbierite, polyvinyl alcohol, 2-Pyrrolidone-5-carboxylic acid sodium (PCA-Na), BSJ15 one or more.With the total weight of paraquat water dispersible granules, the consumption of humectant can be 0.1-5%, preferred 0.5-1.5%.
In the present invention, anticaking agent used can be anticaking agent conventional in any pesticide field, can be such as be selected from reactive tricalcium phosphate, paratoluenesulfonic acid sodium salt, dodecyl benzsulfamide, sulfonic chloride, diamino dicarboxylic acid sodium, potassium ferrocyanide, sodium silicoaluminate, silica one or more.With the total weight of paraquat water dispersible granules, the consumption of anticaking agent can be 0-5%, preferred 0.1-5%, more preferably 0.5-1.5%.
In the present invention, adhesive used can be adhesive conventional in any pesticide field, can be such as be selected from carbohydrate, water soluble starch, dextrin, polyvinylpyrrolidone one or more.With the total weight of paraquat water dispersible granules, the consumption of adhesive can be 0-3%, preferred 0.5-3%.
In the present invention, emetic used can be the reagent having emetic action conventional in any pesticide field, such as triazole pyrimidone etc.The consumption of emetic can be 1/400th of paraquat cation weight.
In the present invention, stink agent used can be reagent frowzy conventional in any pesticide field, such as, be pyridine or methyl-pyridyl compound.With the total weight of paraquat water dispersible granules, the consumption of stink agent can be 0-1%, preferred 0.1-1%.
In the present invention, pigment used can be the pigment that can play difference warning function conventional in any pesticide field, and such as Shi Liang is blue.With the total weight of paraquat water dispersible granules, the consumption of pigment can be 0-0.5%, preferably 0.05-0.5%.
In the present invention, filler used can be insoluble filler conventional in any pesticide field, such as, be to be selected from one or more of sepiolite, pyrophillite, talcum, phosphorus mud, calcium carbonate, conch meal etc.
Below method of the present invention is specifically described.
First, the heating paraquat dichloride aqueous solution (hereinafter referred to as paraquat mother liquor) is dewatered, and makes water content in paraquat mother liquor be 6-21%.Wherein, if carried out excessive dehydration to paraquat mother liquor, water content in paraquat mother liquor can be made to reach 6-21% by adding a certain amount of moisture.Described dehydration is undertaken by mode conventional in this area, such as decompression distillation dehydration, elevating membrane dehydration by evaporation, MVR efficient energy-saving dehydration by evaporation etc.Then be warmed up to 90-130 DEG C, preferred 100-120 DEG C, make paraquat mother liquor be molten state or semisolid.
Then, add humectant in this case in proportion and one or more are selected from the interpolation auxiliary agent of surfactant, emetic, pigment, adhesive, anticaking agent, stink agent and filler, and mix, constant temperature is controlled at 90-130 DEG C, preferred 100-120 DEG C, makes mixed material be molten state or semisolid.
Spray-cooling granulating or whitewashing cooling granulation are carried out to described molten state or semi-solid mixed material.Specifically, described molten state or semi-solid mixed material are sent in cooling granulation tower, after material spray or whitewashing disperse, use the air of-5 to 60 DEG C as refrigerant, self-assembling formation particle after air-cooled, described air refrigerant is through all sealing and circulating uses after water for cooling.Wherein material spray mode can be rotating disk type, pressure type or double-current method.
In a preferred embodiment, can after the pelletizing described stink agent be coated on particle, such as, by modes such as sprays.In another embodiment, pigment and emetic can be joined in paraquat mother liquor in advance.
Paraquat water dispersible granules of the present invention is fine and close smooth round shaped grain or ellipsoid particle.Its particle diameter is 100-1500 μm, is preferably 200-800 μm.
Method of the present invention is quantitatively dewatered in advance to paraquat mother liquor, water content is used directly to prepare paraquat granule up to the paraquat mother liquor of 6-21% as raw material, production process leading portion paraquat is stored in aqueous phase, during granulation, water-dispersible granules itself is also containing relatively large moisture, therefore, in whole procedure, substantially dust is not produced.With other production technology such as spraying dry, extruder grain or pulverizing are mediated comminution granulation and are compared, method of the present invention can ensure that control paraquat keeps a certain amount of moisture from start to finish from raw material to product, do not need extra drying steps, fundamentally eliminate the possibility that dust produces, and the whole sealing and circulating of cold wind uses in whole production process equipment, do not need air draft outside system, do not need to pulverize, dry, mediate or extruder grain operation, production whole process is run completely under air-tight state, completely eliminate the possibility contacted with direct labor with atmospheric environment, thus low consumption production is cleaned in the totally-enclosed achieving paraquat granula.And spray drying granulation technique the paraquat aqueous solution and high temperature air of having prepared auxiliary agent and filler is sprayed into granulating and drying tower simultaneously, high hot-air is utilized to dry up the moisture of paraquat solution, form dry paraquat particle, water vapour and part paraquat fine solid particle are taken out of by air medium.Because moisture latent heat is large, the air quantity needed is huge, cannot collect and recycle, and the waste heat air of entrapped moisture and a large amount of dust needs to carry out dust removal process through operations such as cyclonic separation, bag-type dust, water film dedustings, process is numerous and diverse, tail gas is difficult to qualified discharge, in cloth bag trap dust accumulation after clean difficulty, occupational health and environmental risk higher, in addition, this technique is loaded down with trivial details, and equipment investment is high, and consume energy huge height.There is the operation that pulverizing, oven dry, extruding etc. easily produce dust in extruding or pulverizing prilling, be difficult to continuous airtight operation, be difficult to avoid the dust of practitioner to contact, occupational health and environmental risk are higher equally.
Paraquat water dispersible granules of the present invention, due to containing a certain amount of moisture, therefore in accumulating and use procedure, does not produce dust, thus improves paraquat accumulating and safety in utilization.Wherein humectant avoids the water loss of product in storage process.Anticaking agent can contribute to preventing product to lump in storage process adhesion, to improve the mobility of product particle.
On the other hand, the invention provides a kind of packaging product, it comprises paraquat water dispersible granules of the present invention and desiccant particle at water soluble package.Described desiccant can be water-soluble dry agent conventional in any pesticide field, be such as be selected from copper sulphate, sodium sulphate, magnesium sulfate, calcium chloride, magnesium chloride, calcium sulphate one or more.In a preferred embodiment, the percentage by weight of desiccant and paraquat water dispersible granules is 0.5%-50%.Described desiccant can absorb the micro-moisture that paraquat water dispersible granules of the present invention may be overflowed in storage and transport process, paraquat water dispersible granules can be packed with water-soluble bag, so that direct for bagged product whole bag is dropped into sprayer and uses by consumer, avoid contacting medicament.Described water soluble package can be water-soluble bag conventional or commercially available in pesticide field, the normally water-soluble bag of PVA.
On the other hand, the invention provides a kind of production method of described packaging product, described method comprises paraquat water dispersible granules of the present invention and desiccant particle Homogeneous phase mixing, and is loaded in water soluble package by the particle of mixing.In a preferred embodiment, the particle diameter of desiccant particle and paraquat water dispersible granules is close, the moisture fully absorbing paraquat water dispersible granules to make desiccant and may overflow.
The invention provides a kind of herbicidal effect good, produce and the water-dispersible granules containing paraquat dichloride safe to use.Advantage of the present invention is:
1. granule of the present invention has excellent herbicidal effect, bin stability and safety in utilization, and avoids paraquat liquid preparation and easily wrongly take or the Suicide hidden danger taken of getting excited.
2. the preparation technology of granule of the present invention is safe and simple, and preparation process refrigerant all recycles, and runs under achieving whole process air-tight state, avoids dust and produces and leak, energy-saving and environmental protecting, produce clean, and operating cost is cheap.
Further illustrate the present invention by the following examples, but the present invention is never only limitted to following examples.Except as otherwise noted, in formula, percentage is all weight percentage.
The paraquat mother liquor that following examples use is the paraquat dichloride aqueous solution of paraquat cation content about 30.5%.
Embodiment 1: the paraquat mother liquor of previously prepared dehydration
Getting 150 kilograms, paraquat mother liquor squeezes in centrifugal scrapper thin film evaporator, regulates chuck steam pressure, opens vavuum pump and carries out dehydration by evaporation, detect the paraquat concentrate moisture that evaporator flows out.By SH-8B on-line moisture determination instrument (purchased from Shanghai Jia Shi Electronic Science and Technology Co., Ltd., following examples all adopt the method to detect moisture) when to detect moisture be 13.5%, collection material is warmed up to 110 DEG C, observation material is fused solution, be incubated for subsequent use, detecting paraquat cation content by ultraviolet spectrometry detection method (following examples all adopt the method to detect paraquat cation content) is 56.3%.
Embodiment 2: the paraquat mother liquor of previously prepared dehydration
Getting 150 kilograms, paraquat mother liquor squeezes in centrifugal scrapper thin film evaporator, regulates chuck steam pressure, opens vavuum pump and carries out dehydration by evaporation, detect the paraquat concentrate moisture that evaporator flows out.When being 16.8% by SH-8B on-line moisture determination instrument detection moisture, collection material is warmed up to 110 DEG C, and observation material is fused solution, is incubated for subsequent use, and detecting paraquat cation content by ultraviolet spectrometry detection method is 52.9%.
Embodiment 3: the paraquat mother liquor of previously prepared dehydration
Getting 150 kilograms, paraquat mother liquor joins in 200L enamel reaction still, adds blue 0.1 kilogram of emetic triazole pyrimidone 0.114 kilogram of ， Liang successively.Reacting kettle jacketing deep fat heats, open vavuum pump and carry out vacuum distillation dehydration, the moisture of paraquat concentrate in detection reaction still, vacuum distillation is stopped when moisture is down to 13.5%, be warmed up to 110 DEG C, when observation material is fused solution, be incubated for subsequent use, detecting paraquat cation content is 56.2%.
The preparation of embodiment 4:50% paraquat water dispersible granules
Paraquat dehydration 9.1 kilograms, mother liquor prepared by Example 1, at the temperature of 110 DEG C, adds 0.4 kilogram of polyoxyethylene laurel ether successively, 0.2 kilogram of sodium lauryl sulfate, 0.05 kilogram of pyrrolidone sodium carboxylate, 0.2 kilogram of glucose, 0.02 kilogram of sodium silicoaluminate, 0.013 kilogram of triazole pyrimidone, 0.01 kilogram of picoline, 0.005 Qian Ke Liang is blue, 0.02 kilogram of calcium carbonate, stirring and evenly mixing, increases the temperature to 115 DEG C, and now material is molten state.This material is squeezed into cooling granulation tower, and control tower Inner eycle air temperature is at 20-25 DEG C, and material carries out molten atomizing cooling granulation under 0.5Mpa condition.Obtaining particle diameter is the smooth particle of the densification of 200-800 micron.Paraquat cation content 50.2% in particle after testing, moisture 11.6%.
The preparation of embodiment 5:50% paraquat water dispersible granules
Paraquat dehydration 9.1 kilograms, mother liquor prepared by Example 3, at the temperature of 110 DEG C, add 0.4 kilogram of dodecyl sodium sulfate successively, 0.1 kilogram of azone, 0.05 kilogram of polyvinyl alcohol (model 17-88), 0.2 kilogram of starch, 0.02 kilogram of sodium silicoaluminate, 0.01 kilogram of picoline, 0.02 kilogram of calcium carbonate, stirring and evenly mixing, increases the temperature to 115 DEG C, and now material is molten state.This material is squeezed into cooling granulation tower, and control tower Inner eycle air temperature is at 20-25 DEG C, and material carries out molten atomizing cooling granulation under 0.5Mpa condition.Obtaining particle diameter is the smooth particle of the densification of 200-800 micron.Paraquat cation content 50.1% in particle after testing, moisture 11.0%.
Embodiment 6: paraquat water dispersible granules production process dust detects
Production scene is prepared at the paraquat water dispersible granules of embodiment 4, configure four LD-50 micro computer dust detectors, dust total amount (TSP) changes of contents of producers' operating environment (two test points) and granulation tower inner circulating air environment in the outer atmospheric environment of continuous detection workshop, workshop, measured data is as follows:
Note: 1, the above data that detect are the statistical average detected continuously;
2, do not occur in testing process detecting data rapid fluctuation phenomenon.
Can find out by detecting data above, substantially producing without dust in production process, not to environmental effects, operation environment safety.
The preparation of embodiment 7:50% paraquat water dispersible granules
Paraquat dehydration 9.1 kilograms, mother liquor prepared by Example 1, keeps temperature 110 DEG C, adds 0.4 kilogram of dodecyl sodium sulfate successively, 0.1 kilogram of azone, 0.05 kilogram of polyvinyl alcohol (model 17-88), 0.2 kilogram of starch, 0.013 kilogram of triazole pyrimidone, 0.005 Qian Ke Liang is blue, 0.02 kilogram of talcum powder, 0.02 kilogram of sodium silicoaluminate, stirring and evenly mixing in mixing kettle, increase the temperature to 115 DEG C, now material is molten state.This material is squeezed into cooling granulation tower, and control tower Inner eycle air temperature is at 20-25 DEG C, and material carries out molten atomizing cooling granulation under 0.5Mpa condition.The water-dispersible granule obtained is proceeded to mixing kettle, sprays into 0.01 kilogram of picoline, stirring and evenly mixing, obtaining particle diameter is the smooth particle of the densification of 200-800 micron.Paraquat cation content 50.1% in particle after testing, moisture 11.7%.
The preparation of embodiment 8:50% paraquat water dispersible granules
Paraquat dehydration 9.1 kilograms, mother liquor prepared by Example 1, keeps temperature 110 DEG C, adds 0.4 kilogram of polyoxyethylene nonylphenol ether successively, 0.1 kilogram of Dodecyl Glucoside, 0.05 kilogram of propane diols, 0.2 kilogram of glucose, 0.02 kilogram of paratoluenesulfonic acid sodium salt, 0.013 kilogram of triazole pyrimidone, 0.01 kilogram of picoline, 0.005 Qian Ke Liang is blue, the sepiolite of 0.02 kilogram of ultramicro grinding, stirring and evenly mixing, be incubated at 110 DEG C, now material is pasty material.This material is squeezed into cooling granulation tower, and control tower Inner eycle air temperature is at 20-25 DEG C, and material utilizes capstan to be become by material dispersion particle to carry out cooling granulation under 0.1Mpa condition.Obtaining particle diameter is the smooth particle of the densification of 200-800 micron.Paraquat cation content 50.0% in particle after testing, moisture 11.8%.
The preparation of embodiment 9,50% paraquat water dispersible granules
Paraquat dehydration 9.1 kilograms, mother liquor prepared by Example 3, keep temperature 110 DEG C, add 0.4 kilogram of polyoxyethylene nonylphenol ether successively, 0.1 kilogram of Dodecyl Glucoside, 0.05 kilogram of propane diols, 0.2 kilogram of glucose, the talcum powder of 0.02 kilogram of ultramicro grinding, 0.02 kilogram of paratoluenesulfonic acid sodium salt, stirring and evenly mixing, be incubated at 110 DEG C, now material is pasty material.This material is squeezed into cooling granulation tower, and control tower Inner eycle air temperature is at 20-25 DEG C, and material utilizes capstan to be become by material dispersion particle to carry out cooling granulation under 0.1Mpa condition.The water-dispersible granules obtained is proceeded to mixing kettle, sprays into 0.01 kilogram of picoline, obtaining particle diameter is the smooth particle of the densification of 200-800 micron.Paraquat cation content 50.1% in particle after testing, moisture 11.6%.
The preparation of embodiment 10:40% paraquat water dispersible granules
The paraquat using embodiment 1 to prepare quantitatively dewaters 7.3 kilograms, mother liquor, 0.32 kilogram of dodecyl sodium sulfate, 0.08 kilogram of azone, 0.04 kilogram of polyvinyl alcohol (model 17-88), 0.16 kilogram of starch, 0.01 kilogram of triazole pyrimidone, 0.005 Qian Ke Liang is blue, 0.02 kilogram of sodium silicoaluminate, the conch meal of 1.98 kilograms of ultramicro grinding, 0.01 kilogram of picoline, repeats preparation procedure described in embodiment 4, and obtaining particle diameter is the smooth particle of the densification of 200-800 micron.Paraquat cation content 40.1% in particle after testing, moisture 9.4%.
The preparation of embodiment 11:30% paraquat water dispersible granules
The paraquat using embodiment 2 to prepare quantitatively dewaters 5.7 kilograms, mother liquor, 0.22 kilogram of dodecyl sodium sulfate, 0.06 kilogram of azone, 0.04 kilogram of polyvinyl alcohol (model 17-88), 0.12 kilogram of starch, 0.01 kilogram of triazole pyrimidone, 0.004 Qian Ke Liang is blue, 0.02 kilogram of sodium silicoaluminate, 3.78 kilogram calcium carbonate, 0.01 kilogram of picoline, repeats preparation procedure described in embodiment 4, and obtaining particle diameter is the smooth particle of the densification of 200-800 micron.Paraquat cation content 30.1% in particle after testing, moisture 9.4%.
The preparation of embodiment 12:50% paraquat water dispersible granules
The paraquat using embodiment 2 to prepare quantitatively dewaters 9.45 kilograms, mother liquor, 0.3 kilogram of dodecyl sodium sulfate, 0.1 kilogram of Dodecyl Glucoside, 0.04 kilogram of polyvinyl alcohol (model 17-88), 0.02 kilogram of starch, 0.013 kilogram of triazole pyrimidone, 0.004 Qian Ke Liang is blue, 0.02 kilogram of sodium silicoaluminate, 0.01 kilogram of calcium carbonate, 0.01 kilogram of picoline, repeats preparation procedure described in embodiment 4, and obtaining particle diameter is the smooth particle of the densification of 200-800 micron.Paraquat cation content 50.1% in particle after testing, moisture 15.6%.
Embodiment 13: the preparation of the packaging product of paraquat water dispersible granules
0.5 kilogram of paraquat water dispersible granules decile ten parts prepared by Example 4, add successively 0 gram, sodium sulphate, 0.2 gram, 0.4 gram, 0.6 gram, 0.8 gram, 1.0 grams, 1.2 grams, 1.4 grams, 1.6 grams, 1.8 grams, then be respectively charged in the water-soluble bag of PVA, heat sealing.
Carry out thermodynamic stability test according to agricultural chemicals universal standard method GB-T19136-2003, result is as follows:
Above test data shows, adds the stable use that a certain amount of desiccant can ensure water-soluble bag.
Embodiment 14: the preparation of the packaging product of paraquat water dispersible granules
Example 4 prepare 0.5 kilogram of paraquat granula decile ten parts, add successively 0 gram, magnesium chloride, 0.2 gram, 0.4 gram, 0.6 gram, 0.8 gram, 1.0 grams, 1.2 grams, 1.4 grams, 1.6 grams, 1.8 grams, be then respectively charged in the water-soluble bag of PVA, heat sealing.
Carry out thermodynamic stability test according to agricultural chemicals universal standard method, result is as follows:
Above test data shows, adds the stable use that a certain amount of desiccant can ensure water-soluble bag.
Embodiment 15: the detection of paraquat water dispersible granules physicochemical property
The product collecting embodiment 7 to 12 carries out physicochemical property detection respectively, and result is as follows:
Embodiment 16: the test of pesticide effectiveness contrasts
Reagent agent: three kinds of water dispersible granules of the embodiment of the present invention 9,10,11
Contrast medicament: commercially available 200g/L paraquat aqua
Prevent and kill off object: broad leaved weed lamb's-quarters, field bindweed, Mo Luo, humulus grass, welted thistle.
Test method: according to the area of each experimental plot, accurately calculates and weighs good various medicament, be watered and be diluted to unified concentration, carry out even spraying with sprayer.
After medicine, observe quick-acting in 0-4 hour respectively after test, within after medicine 4 days, observe weeds death condition, the activity of weeding of more various medicament.
The weeds of embodiments of the invention preparation process all show symptom of chemical damage and contrast medicament indifference after medication after 45 minutes, show that granula of the present invention has excellent quick-acting.
After water dispersible granules of the present invention and commercial paraquat aqua medicine, 4 days herbicidal effects contrast as follows:
In upper table, result can be found out, paraquat water dispersible granules of the present invention is very high to weeds activity, contrasts no significant difference with the contrast paraquat aqua of identical effective content.
The foregoing is only the preferred embodiments of the invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, some improvement and modification can also be made, also should be considered as protection scope of the present invention.
Claims (20)
1. the water-dispersible granules containing paraquat dichloride, it is characterized in that, described water-dispersible granules comprise the paraquat dichloride of the 10-65 % by weight represented with paraquat cation content, the moisture of 5-20 % by weight, the humectant of 0.1-5 % by weight and one or more be selected from the interpolation auxiliary agent of surfactant, adhesive, anticaking agent, emetic, pigment, stink agent and insoluble filler.
2. the water-dispersible granules containing paraquat dichloride according to claim 1, wherein said water-dispersible granules comprises following component: the paraquat dichloride of the 10-65 % by weight represented with paraquat cation content, the moisture of 5-20 % by weight, the humectant of 0.1-5 % by weight, the surfactant of 1-20 % by weight, the adhesive of 0-3 % by weight, the anticaking agent of 0-5 % by weight, be equivalent to the emetic of 1/400th of paraquat cation weight, the pigment of 0.05-0.5 % by weight, the stink agent of 0-1 % by weight, and the insoluble filler of surplus to 100 % by weight.
3. the water-dispersible granules containing paraquat dichloride according to claim 1 and 2, wherein said moisture is 8-18 % by weight.
4. the water-dispersible granules containing paraquat dichloride according to claim 1 and 2, wherein said moisture is 10-15 % by weight.
5. the water-dispersible granules containing paraquat dichloride according to claim 1 and 2, wherein said paraquat cation content is 20-50 % by weight.
6. the water-dispersible granules containing paraquat dichloride according to claim 1 and 2, wherein said humectant be selected from polyalcohol, 2-Pyrrolidone-5-carboxylic acid sodium, BSJ15 one or more.
7. the water-dispersible granules containing paraquat dichloride according to claim 6, wherein said polyalcohol comprises glycerine, propane diols, 1,3-BDO, sorbierite, polyvinyl alcohol.
8. the water-dispersible granules containing paraquat dichloride according to claim 1 and 2, wherein said anticaking agent be selected from reactive tricalcium phosphate, paratoluenesulfonic acid sodium salt, dodecyl benzsulfamide, sulfonic chloride, diamino dicarboxylic acid sodium, potassium ferrocyanide, sodium silicoaluminate, silica one or more.
9. the water-dispersible granules containing paraquat dichloride according to claim 1 and 2, wherein grain diameter is 100-1500 micron.
10. the water-dispersible granules containing paraquat dichloride according to claim 1 and 2, wherein grain diameter is 200-800 micron.
11. preparations, according to the method for the water-dispersible granules containing paraquat dichloride one of claim 1-10 Suo Shu, said method comprising the steps of:
(1) the paraquat dichloride aqueous solution is dewatered, make its water content be 6-21 % by weight;
(2) at 90-130 DEG C by dehydration the paraquat dichloride aqueous solution under molten state or semisolid with humectant, and one or more are selected from the interpolation auxiliary agent Homogeneous phase mixing of surfactant, emetic, anticaking agent, pigment, stink agent, adhesive and filler, to obtain molten state or semi-solid mixed material;
(3) in cooling granulation tower, described molten state or semi-solid mixed material are sprayed or whitewash cooling granulation.
12. methods according to claim 11, wherein, in described spraying or whitewashing cooling granulation, use the air of-5 to 60 DEG C as refrigerant, refrigerant is through using except water for cooling Posterior circle.
13. methods according to claim 11 or 12, wherein, in described spraying or whitewashing cooling granulation, material material spray mode is rotating disk type, pressure type or double-current method.
14. methods according to claim 11 or 12, wherein said method also comprises and stink agent being coated on particle after granulation.
15. 1 kinds of packaging products, its water soluble package comprise according to the water-dispersible granules containing paraquat dichloride one of claim 1-10 Suo Shu or prepare according to the method one of claim 11-14 Suo Shu contain the water-dispersible granules of paraquat dichloride, and desiccant particle.
16. packaging products according to claim 15, wherein said desiccant be selected from copper sulphate, sodium sulphate, magnesium sulfate, calcium chloride, magnesium chloride, calcium sulphate one or more.
17. packaging products according to claim 15, wherein said desiccant particle is 0.5%-50% with the percentage by weight of the water-dispersible granule containing paraquat dichloride.
The method of the packaging product that one of 18. preparation claim 15-17 are described, described method comprises according to the water-dispersible granules containing paraquat dichloride one of claim 1-10 Suo Shu or water-dispersible granules and the desiccant particle Homogeneous phase mixing containing paraquat dichloride prepared according to the method one of claim 11-14 Suo Shu, and by the particle loading water soluble package that mixes.
19. methods according to claim 18, the particle of wherein said desiccant is close with the particle diameter of the water-dispersible granules containing paraquat dichloride.
20. methods according to claim 18 or 19, wherein said water soluble package is the water-soluble bag of PVA.
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| CN1764373A (en) * | 2003-02-19 | 2006-04-26 | 拜尔作物科学有限公司 | Method for producing water-dispersible granules. |
| CN102415375A (en) * | 2011-12-23 | 2012-04-18 | 吴希法 | Paraquat-containing water dispersible granules and preparation method thereof |
| CN103053527A (en) * | 2011-10-21 | 2013-04-24 | 浙江新安化工集团股份有限公司 | Paraquat solid preparation and preparation method thereof |
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| CN1764373A (en) * | 2003-02-19 | 2006-04-26 | 拜尔作物科学有限公司 | Method for producing water-dispersible granules. |
| CN103053527A (en) * | 2011-10-21 | 2013-04-24 | 浙江新安化工集团股份有限公司 | Paraquat solid preparation and preparation method thereof |
| CN102415375A (en) * | 2011-12-23 | 2012-04-18 | 吴希法 | Paraquat-containing water dispersible granules and preparation method thereof |
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