CN102153103B - Preparation method and application of modified attapulgite clay - Google Patents
Preparation method and application of modified attapulgite clay Download PDFInfo
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- CN102153103B CN102153103B CN 201010583337 CN201010583337A CN102153103B CN 102153103 B CN102153103 B CN 102153103B CN 201010583337 CN201010583337 CN 201010583337 CN 201010583337 A CN201010583337 A CN 201010583337A CN 102153103 B CN102153103 B CN 102153103B
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Abstract
The invention discloses a preparation method of attapulgite high-performance pesticide carrier. The preparation method comprises the following steps: purifying attapulgite clay, drying, grinding, adding an additive, baking at a low temperature, cooling, grinding again, then adding another additive to mix evenly and prepare the pesticide carrier. The modified attapulgite obtained through a series of treatments has the original characteristics of attapulgite that the attapulgite has high absorbability and is inert to pesticide; the surface acid value of the original attapulgite can be reduced, the specific area can be increased, the water absorption rate can be reduced; the modified attapulgite can be used as pesticide carrier to replace white carbon black, thus the drug concentration can be reduced, the medical effect can be prolonged and the environmental pollutions caused by pesticide can be reduced. Therefore, the modified attapulgite has great significance in increasing the quality of the Chinese powder pesticide, reducing the dosage of the Chinese pesticide and expanding the exports of the Chinese pesticide and carrier.
Description
Technical field
The present invention relates to a kind of preparation method and application thereof of modified attapulgite clay.
Background technology
China is a large agricultural country, needs every year a large amount of agricultural chemicals guarantee the good harvest of agricultural high yield; Along with the use of a large amount of agricultural chemicals, must bring environmental pollution and environmental deterioration, the level that therefore reduces agricultural chemicals usage amount and the raising formulations of pesticide is extremely urgent.Pesticide powder and granule have many advantages---and the organic solvent of use is few, pesticide activity component availability is high, therefore the own environmentally safes of carrier that pulvis is used etc. develop that specific surface area is large, adsorptivity is strong, the high-performance farm chemical carrier of surperficial acid number low (be pKa value greatly) has very wide market prospects.
The quality and performance of powder pesticide is good and bad, and except the composition and auxiliary agent of agricultural chemicals, the performance of carrier has also played very large effect; China was less to the research of farm chemical carrier in the past, energy mainly concentrates on the auxiliary agent aspect, in the powder pesticide process of manufacture, carrier accounts for about the 50%--90% of pulvis gross weight, therefore want to produce high-quality, high performance pulvis, only make an effort at auxiliary agent and get twice the result with half the effort, because the performance of a large amount of (50%--90%) carriers of the very difficult change of the auxiliary agent of a small amount of (1-2%).The farm chemical carrier of at present domestic main use is white carbon, fine particle calcium carbonate, kaolin, diatomite and a small amount of attapulgite, bentonite etc.White carbon is because being artificial synthetic, and better as the farm chemical carrier effect, its shortcoming is that price is too high, produce white carbon and can produce a large amount of effluent brines, so formulations of pesticide factory seldom uses; Fine particle calcium carbonate, although be artificial synthetic, price is not high yet yet, and its shortcoming is that specific surface area is less, and adsorptivity is relatively poor, and the used as pesticides carrier can only Partial Replacement; Kaolin causes as the very bad usefulness of farm chemical carrier because of than the reason such as great, that hardness is large, specific surface area is little, is mainly manifested in the process equipment serious wear, can not compounding high concentration agricultural chemical etc.; Diatomite, bentonite because of reasons such as surperficial acid number are large, adsorptivity is less, are used aspect farm chemical carrier and are very limited; Although the surperficial acid number of attapulgite is larger, but its quality is softer, adsorptivity is strong, if attapulgite is carried out modification---namely add modifier its surperficial acid number is reduced, improve about pKa to 3.3, it can be used for various pesticide powders, wetting powder and granule, and makes the agricultural chemicals shelf-life prolong several times---and can keep agricultural chemicals not decompose for a long time.
The attapulgite carrier can make active component (agricultural chemicals, medicine etc.) through scientific and reasonable modification, keeps not decomposing for a long time (being to prolong the shelf-life) under low concentration; Comparing active component concentration with fine particle calcium carbonate kaolin can further reduce, and the pollution that environment is brought obviously reduces; The powder pesticide cost does not only increase, and descends on the contrary degradation.
Concave-convex clay rod is through simple pulverize (or abrasive dust), directly unsatisfactory as farm chemical carrier, main cause is that attapulgite has very strong adsorbed water ability (general about 15%), contain stronger surperficial acid number (pKa＜1.8), these characteristics cause attapulgite to be subject to a lot of restrictions when using as farm chemical carrier, less such as spendable pesticide species, the storage period of agricultural chemicals is shorter; At present domesticly be to select high-quality attapulgite raw ore to dry (or oven dry), pulverizing, abrasive dust, grading system gets attapulgite farm chemical carrier (powder) as the process technology of farm chemical carrier to attapulgite; The producer that also has, broken selected attapulgite breeze, add appropriate amount of acid (inorganic acid or organic acid), reduce attapulgite system pH value by 8 to 6, drying, abrasive dust, grading system get the attapulgite farm chemical carrier again; Attapulgite through a series of like this processings, constant or the rising of its surface acidity, stability to agricultural chemicals (active component), not what improvement, improve the stability of agricultural chemicals by the method that adds other auxiliary agent, this must cause the production cost of powder agricultural chemicals to increase, and effect is also not obvious.
Summary of the invention
The invention discloses a kind of preparation method of modified attapulgite clay, Concave-convex clay rod through modification is keeping under the prerequisite of the strong adsorptivity of attapulgite substantially, attapulgite's surface acid number and strong absorptive energy have been reduced, the difficult problems such as the limitation, storage period of the pesticide species of attapulgite used as pesticides carrier be short have been solved, fully shown recessed own characteristic---high adsorption, high surface, not only improved drug effect but also can avoid poisoning.
The present invention adopts following technical scheme for achieving the above object:
A kind of preparation method of modified attapulgite clay may further comprise the steps:
(1) opal in the Concave-convex clay rod raw ore, the Black Warrior, the impurity such as marble are removed in purification;
(2) Concave-convex clay rod after drying will be purified carries out drying, requires moisture less than 5%;
(3) dried Concave-convex clay rod is pulverized in pulverizing;
(4) spray auxiliary agent 1 auxiliary agent 1 soluble in water is sprayed onto on the Concave-convex clay rod particle after sieving, stir, make auxiliary agent fully be coated on the surface of Concave-convex clay rod particle;
(5) Concave-convex clay rod after low temperature cures step (4) stirred is put into baking oven and is carried out low temperature and cure, and temperature is controlled at 35-45 ℃, and constant temperature 3-4 hour, cooling crush;
(6) add auxiliary agent 2 auxiliary agent 2 is joined in the Concave-convex clay rod after step (5) is pulverized, stir, get final product.
Described auxiliary agent 1 is selected from a kind of in neopelex, stearic acid, the polyvinyl alcohol, and auxiliary agent 1 is (0.2-2) with the weight ratio of Concave-convex clay rod: 100; Described auxiliary agent 2 is selected from, a kind of in calgon and the sodium pyrophosphate, and auxiliary agent 2 is (0.1-0.3) with the weight ratio of Concave-convex clay rod: 100.
The preparation method of described modified attapulgite clay is characterized in that: when described step (3) was pulverized, the attapulgite after the pulverizing was divided into two kinds of particle level and fine powder levels, and described particle level granularity is: the 8-40 order; Fine powder level granularity requirements: 325 orders, 95% passes through.
The application of described modified attapulgite clay is characterized in that: the Concave-convex clay rod after the modification can be used as farm chemical carrier.
Compared with kaolin with farm chemical carrier white carbon commonly used by the attapulgite modified attapulgite farm chemical carrier that makes and to have following advantage:
1, the adsorptivity of the low attapulgite modified farm chemical carrier of production cost is near white carbon, but production cost only is 1/3 of white carbon;
2, the attapulgite modified farm chemical carrier of good stability and white carbon, kaolin is compared, and is better to the stability of agricultural chemicals;
3, hardness is little, and the strong attapulgite modified farm chemical carrier hardness of adsorptivity is little, and adsorptivity is more suitable for by force formulation (as pulverizing and dispersion);
4, has excellent agglomeration preventing performance;
5, the function modified attapulgite of long-acting slow-release has the long-acting slow-release function because fabulous nano aperture is arranged as a kind of farm chemical carrier, can reduce drug concentration, prolongs drug effect, reduces agricultural chemicals to the pollution of environment.
6, attapulgite modified suspending agent and the thickener that also can be used as a kind of environment-friendly type of liquid pesticidal especially produced the rare high-quality auxiliary agent of ecological agricultural chemical.
Table 1 be attapulgite modified Performance Ratio for several farm chemical carriers commonly used
Description of drawings
Fig. 1 is process chart of the present invention.
Embodiment
A kind of preparation method of modified attapulgite clay may further comprise the steps:
(1) opal in the Concave-convex clay rod raw ore, the Black Warrior, the impurity such as marble are removed in purification;
(2) Concave-convex clay rod after drying will be purified carries out drying, requires moisture less than 5%;
(3) dried Concave-convex clay rod is pulverized in pulverizing;
(4) spray auxiliary agent 1 auxiliary agent 1 soluble in water is sprayed onto on the Concave-convex clay rod particle after sieving, stir, make auxiliary agent fully be coated on the surface of Concave-convex clay rod particle;
(5) Concave-convex clay rod after low temperature cures step (4) stirred is put into baking oven and is carried out low temperature and cure, and temperature is controlled at 35-45 ℃, and constant temperature 3-4 hour, cooling crush;
(6) add auxiliary agent 2 auxiliary agent 2 is joined in the Concave-convex clay rod after step (5) is pulverized, stir, get final product.
When described step (3) was pulverized, the attapulgite after the pulverizing was divided into two kinds of particle level and fine powder levels, and described particle level granularity is: the 8-40 order; Fine powder level granularity requirements: 325 orders, 95% passes through.
Described auxiliary agent 1 is selected from neopelex, and the weight ratio of neopelex and Concave-convex clay rod is 0.2: 100; Described auxiliary agent 2 is sodium phosphate trimer, and auxiliary agent 2 is 0.1: 100 with the weight ratio of Concave-convex clay rod.
Concave-convex clay rod after the modification can be applicable to agricultural chemicals, medical aspect, uses as farm chemical carrier and medical carrier.
Claims (2)
1. the preparation method of a modified attapulgite clay is characterized in that may further comprise the steps:
(1) opal in the Concave-convex clay rod raw ore, the Black Warrior, marble impurity are removed in purification;
(2) Concave-convex clay rod after drying will be purified carries out drying, requires moisture less than 5%;
(3) pulverize dried Concave-convex clay rod is pulverized, during pulverizing, the Concave-convex clay rod after the pulverizing is divided into two kinds of particle level and fine powder levels, and described particle level granularity is: the 8-40 order; Fine powder level granularity requirements: 325 orders, 95% passes through;
(4) spray auxiliary agent 1 auxiliary agent 1 soluble in water is sprayed onto on the Concave-convex clay rod particle after sieving, stir, make auxiliary agent fully be coated on the surface of Concave-convex clay rod particle;
(5) Concave-convex clay rod after low temperature cures step (4) stirred is put into baking oven and is carried out low temperature and cure, and temperature is controlled at 35-45 ℃, and constant temperature 3-4 hour, cooling crush;
(6) add auxiliary agent 2 auxiliary agent 2 is joined in the Concave-convex clay rod after step (5) is pulverized, stir, get final product;
Described auxiliary agent 1 is selected from a kind of in neopelex, stearic acid, the polyvinyl alcohol, and auxiliary agent 1 is (0.2-2) with the weight ratio of Concave-convex clay rod: 100; Described auxiliary agent 2 is selected from a kind of in sodium phosphate trimer, calgon and the sodium pyrophosphate, and auxiliary agent 2 is (0.1-0.3) with the weight ratio of Concave-convex clay rod: 100.
2. the application of modified attapulgite clay as claimed in claim 1 is characterized in that: the Concave-convex clay rod after the modification is as farm chemical carrier.
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| CN 201010583337 CN102153103B (en) | 2010-12-10 | 2010-12-10 | Preparation method and application of modified attapulgite clay |
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| CN103665494B (en) * | 2013-11-15 | 2016-01-06 | 蚌埠市正园电子科技有限公司 | A kind of Composite rubber gasket material and preparation method thereof |
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| CN1109269A (en) * | 1994-03-28 | 1995-10-04 | 欧阳福民 | Sepiolite pesticide carrier |
| CN101715762A (en) * | 2009-11-24 | 2010-06-02 | 锦州硕丰农药集团有限公司 | Pesticide granule carrier using clay as adjuvant material and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6875381B2 (en) * | 2001-12-18 | 2005-04-05 | United Phosphorus, Ltd. | Process for preparation of chemically stable, dry-flow, low compact, dust free, soluble granules of phosphoroamidothioates |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1109269A (en) * | 1994-03-28 | 1995-10-04 | 欧阳福民 | Sepiolite pesticide carrier |
| CN101715762A (en) * | 2009-11-24 | 2010-06-02 | 锦州硕丰农药集团有限公司 | Pesticide granule carrier using clay as adjuvant material and production method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103665494B (en) * | 2013-11-15 | 2016-01-06 | 蚌埠市正园电子科技有限公司 | A kind of Composite rubber gasket material and preparation method thereof |
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