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Production of 45% Lime-Sulfur Mixture with Slaked Lime and Its Technology

A technology of lime sulfur mixture and slaked lime, which is applied in the direction of biocide, biocide, plant growth regulator, etc., can solve the problems of difficult separation of insoluble matter and feed liquid, failure of reaction kettle to realize reaction, and inability to add materials to react, etc. Achieve the effect of uniform material, shortened reaction time, and guaranteed quality

Active Publication Date: 2020-03-20
宜宾北方川安化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their reaction conditions are harsh, and the reaction temperature to be achieved is 180°C, and the pressure is less than 1 MPa. The reaction can not be realized by commonly used reactors; and some existing technologies have a reaction pressure of 0.07 MPa to 0.08 MPa. The added materials are fully reacted in the reactor, and the main defects of the prior art are as follows:
[0006] 1) The material becomes slurry during the reaction process, and it is difficult to separate the insoluble matter from the feed liquid, which is not conducive to the formation of crystals (the water in this reaction is not only the reaction solvent, but also an indispensable part of the product composition);
[0007] 2) When the temperature is much higher than normal temperature, if it is directly packed into bags, the heat released by it will cause great harm to the operator;
[0008] 3) During the filling process, when the temperature is low, it will quickly condense and agglomerate. For small-sized packaging, countless formers (or molds) are needed to fix the product into a certain shape. After solidification, it needs to be removed from the mold. Type it out, the procedure is complicated;
[0009] 4) The product is not a crystal in the true sense, but a paste (or solid) with high insoluble content;

Method used

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  • Production of 45% Lime-Sulfur Mixture with Slaked Lime and Its Technology
  • Production of 45% Lime-Sulfur Mixture with Slaked Lime and Its Technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Feeding with slaked lime (5000l kettle):

[0036] Weigh raw materials in proportion, 725Kg of slaked lime, 850 Kg of sulfur, 1300 Kg of water, 3.6 Kg of catalytic promoter, the mass percent of sulfur must be greater than or equal to 99%, the mass percent of slaked lime must be greater than or equal to 90%, and the particle size is above 180 mesh , the catalytic promoter is ferrosilicon, its mass percentage is 80%, and the particle size passes through a 100-mesh sieve.

[0037] The process includes the following steps: first add water in proportion, then put slaked lime into the reactor under stirring, then add sulfur, and finally add catalytic promoter; set the reaction temperature to 137°C, The total reaction time until the end of the reaction is 55 minutes, and the reaction generates calcium polysulfide compound. At the end of the reaction, air pressure is used to separate the solid and liquid through the plate frame, and the clear liquid that meets the product qualit...

Embodiment 2

[0039] Feeding with slaked lime (5000l kettle):

[0040] Weigh raw materials in proportion, i.e. 720Kg of slaked lime, 850 Kg of sulfur, 1250 Kg of water, 3.5 Kg of catalyst promoter, the mass percent of sulfur is greater than or equal to 99%, the mass percent of slaked lime is greater than or equal to 90%, and the particle size is 180 mesh Above, the catalytic promoter is ferrosilicon, its mass percentage is 80%, and the particle size passes through a 100-mesh sieve.

[0041] The process includes the following steps: first add water in proportion, then put slaked lime into the reactor under stirring, then add sulfur, and finally add catalytic promoter; set the reaction temperature to 135°C, The total reaction time until the end of the reaction is 50 min, and the reaction generates calcium polysulfide compound. At the end of the reaction, air pressure is used to separate the solid and liquid through the plate frame, and the clear liquid that meets the product quality standard ...

Embodiment 3

[0043] Feeding with slaked lime (100l kettle):

[0044] Take each raw material in proportion, namely slaked lime 22Kg, sulfur 25 Kg, water 43Kg, catalytic promoter 0.14 Kg,

[0045] The mass percent of sulfur is greater than or equal to 99%, the mass percent of slaked lime is greater than or equal to 90%, the particle size is above 180 mesh, and the catalytic promoter is ferrosilicon, the mass percent is 80%, and the particle size passes through a 100 mesh sieve.

[0046] The process includes the following steps: first add water in proportion, then put slaked lime into the reactor under stirring, then put in sulfur, and finally add catalytic promoter; set the reaction temperature to 145°C, The total reaction time until the end of the reaction is 70 minutes, and the reaction generates calcium polysulfide compound. At the end of the reaction, air pressure is used to separate the solid and liquid through the plate frame, and the clear liquid that meets the product quality standard ...

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PUM

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Abstract

Belonging to the field of inorganic pesticide synthesis, the invention specifically relates to 45% lime sulphur produced by substitution of quick lime with slaked lime and a process thereof. The process includes: putting 1 part of slaked lime, (1.10-1.22) parts of sulfur, and (1.70-1.80) parts of water into a reaction kettle, carrying out reaction under the circumstances of a proper amount of a catalyst, appropriate temperature and pressure to generate a calcium polysulfide compound, and then conducting pressure filtration and freezing crystallization, thus obtaining the product. The product quality is stable and is easily controllable, the main material consumption is lower than that of quick lime production. And pilot scale production indicates that the process can meet the demands of mass production.

Description

technical field [0001] The invention belongs to the field of inorganic pesticide synthesis, and specifically relates to the production of 45% lime-sulfur mixture by replacing quicklime with slaked lime and a process thereof. Background technique [0002] Lime sulfur mixture is a fungicide used in agriculture made from quicklime, sulfur and water. Lime sulfur mixture can kill germs, pests and insect eggs by penetrating and eroding the body wall of germs and pests. It is an inorganic sulfur preparation that can kill bacteria, insects and mites, and can prevent powdery mildew, rust and brown rot. disease, brown spot, scab, spider mites, scale insects and other pests and diseases. It mainly protects and prevents diseases, and is moderately toxic to humans and animals. Among the many fungicides, lime sulfur is widely used by fruit farmers because of its advantages of convenient material acquisition, low price, good effect, and inhibitory effect on various germs. However, due t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/06A01N59/02A01P1/00A01P3/00A01P7/00A01P7/02A01P7/04
CPCA01N59/02A01N59/06A01N2300/00Y02A50/30
Inventor 崔全合黄建科马明刚袁磊李琼芳王剑锋
Owner 宜宾北方川安化工有限公司