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Sustained-release oxidizing agent taking calcium peroxide as matrix and ethyl cellulose as coating and preparation method thereof

A technology of ethyl cellulose and calcium peroxide, applied in chemical instruments and methods, other chemical processes, organic fertilizers, etc., can solve the problems of short oxygen release time and inability to meet the demand for oxygen, and extend the oxygen release time , solve the problem of oxygen release time, and the effect of easy operation method

Inactive Publication Date: 2016-09-07
INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the release time of calcium peroxide in the gleization paddy field is short, which cannot meet the demand for oxygen in the middle and late stages of rice growth.

Method used

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  • Sustained-release oxidizing agent taking calcium peroxide as matrix and ethyl cellulose as coating and preparation method thereof
  • Sustained-release oxidizing agent taking calcium peroxide as matrix and ethyl cellulose as coating and preparation method thereof
  • Sustained-release oxidizing agent taking calcium peroxide as matrix and ethyl cellulose as coating and preparation method thereof

Examples

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Embodiment 1

[0042] A kind of slow-release oxidant that takes calcium peroxide as substrate ethyl cellulose is coated, and it is made of the raw material (best value) of following weight part:

[0043]

[0044] A kind of preparation method that takes calcium peroxide as matrix ethyl cellulose as the slow-release oxidant of coating, its steps are:

[0045] A.60% calcium peroxide raw powder granulation:

[0046] ①Granulation: Adjust the inclination angle of the disk granulator to 60°, the speed to 30r / min, and the heating device to 40-50°C; take 1kg of calcium peroxide raw powder and divide it into 10 equal parts. Take a portion and put it in a disc, quickly use water mist to moisten it and form small particles, the size of the small particles is about 0.5mm, take it out for use, repeat the above steps 5 or 6 or 8 or 10 or 15 or 20 times, until 10 Parts of powder are all granulated.

[0047] ②Granulation: Adjust the inclination angle of the disc granulator to 60°, the speed to 30r / min, ...

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Abstract

The invention discloses a sustained-release oxidizing agent taking calcium peroxide as the matrix and ethyl cellulose as the coating and a preparation method thereof. The oxidizing agent is prepared from calcium peroxide (60%), a binding agent, attapulgite, and ethyl cellulose according to a certain ratio. The preparation method comprises the following steps: step A, evenly mixing calcium peroxide (60%), a binding agent, and attapulgite, and granulating the mixture to obtain particles with a size of 3 to 5 mm; step B, according to the weight of particles obtained in the step A, supplying enough ethyl cellulose, coating particles by ethyl cellulose, and drying to obtain the sustained-release oxidizing agent. The formula is reasonable, the method is feasible, and the operation is simple. The problem that calcium peroxide releases oxygen in gleying paddy fields in a short period is solved, the growth environment for paddy rice in gleying paddy fields is improved; after calcium peroxide is coated by ethyl cellulose, the oxygen release time is prolonged to 100 days or more, and, compared with that of calcium peroxide powder, the oxygen release time is prolonged by 58 days or more, in other words 1.4 times or more. The oxidizing agent has a great popularization and application value in the middle and lower reaches, which have many glyeing paddy fields, of Changjiang River.

Description

technical field [0001] The invention belongs to the fields of agricultural ecology, soil improvement and plant nutrition control, and more specifically relates to a slow-release oxidant with calcium peroxide as the substrate and ethyl cellulose as the coating, and also relates to a calcium peroxide-based slow-release oxidant. A method for preparing a slow-release oxidant coated with matrix ethyl cellulose, which can effectively reduce toxic reducing substances in a gleization paddy field, supply oxygen to rice, and increase soil pH in an acidic gleization paddy field. The growth environment of rice in gleization paddy fields is improved, and the slow-release oxidant prepared is suitable for improving gleization paddy fields when rice is planted in vast gleization rice fields. Background technique [0002] The gleogenic paddy field is the most common low-yielding field in southern my country, widely distributed in the plain lake area and hilly ridges, accounting for about 1 / 3...

Claims

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Application Information

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IPC IPC(8): C09K17/40C09K109/00C09K101/00
CPCC09K17/40C09K2101/00C09K2109/00
Inventor 董春华罗尊长苏以荣褚飞李万民陈香碧胡亚军洪曦
Owner INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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