Chelated fertilizer and preparation method thereof

A chelate and trace element technology, applied in the field of agriculture, can solve the problem of unsatisfactory chelate fertilizer, and achieve the effect of simple and controllable preparation method, excellent performance, stable and long-lasting release

Active Publication Date: 2016-02-03
SHENYANG RES INST OF CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims to overcome the unsatisfactory technical problems of chelated fertilizers in the prior art in actual use, and provides a more ideal chelated f

Method used

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  • Chelated fertilizer and preparation method thereof
  • Chelated fertilizer and preparation method thereof
  • Chelated fertilizer and preparation method thereof

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preparation example Construction

[0028] The present invention also provides the preparation method of the above-mentioned chelated fertilizer at the same time, which comprises mixing the trace element chelate of diethylenetriaminepentamethylenephosphonic acid and the trace element chelate of iminodisuccinic acid, and the mixing method is not limited in the present invention , various mixing methods can be used.

[0029] Specifically, in some embodiments, the preparation method of the trace element chelate of diethylenetriaminepentamethylenephosphonic acid can be as follows: contacting diethylenetriaminepentamethylenephosphonic acid with an alkali until the pH value is 6-7, Then contact with trace element inorganic salt to prepare trace element chelate of diethylene triamine pentamethylene phosphonic acid.

[0030] In some embodiments, preferably, the base is potassium hydroxide. The metal element chelate fertilizer containing three nutritional elements N, P and K can be prepared with more comprehensive nutri...

Embodiment 1

[0043] (1) Preparation of DETPMP trace element chelate:

[0044] Weigh 160g DETPMP (50wt%) into the reaction flask, add 208g water, stir evenly, neutralize the reaction with 225g of 50wt% potassium hydroxide aqueous solution, adjust the pH value of the solution to 6-7, heat up to 50°C, slowly drop Add 50wt% zinc sulfate heptahydrate aqueous solution, observe the solution reaction situation, when the solution becomes turbid, when a white precipitate is generated, stop dripping the zinc sulfate solution, record the quality of the zinc sulfate aqueous solution added as 200g, keep stirring and react for 30min, and prepare The DETPMP chelated zinc is obtained, and the effective chelated zinc content is 12.5 wt%.

[0045] (2) Preparation of IDHA trace element chelate:

[0046] In the reaction kettle, slowly add 54.4g of IDHA sodium into 28.7g of 50wt% zinc sulfate heptahydrate aqueous solution, after completely dissolving, adjust the pH value to 5.0-5.5 with dilute sulfuric acid an...

Embodiment 2

[0051] Adopt the method identical with embodiment 1 to prepare chelate fertilizer, difference is (2) prepare IDHA trace element chelate compound, adopt respectively 15.1g20wt% manganese sulfate inorganic salt aqueous solution and 16.0g20wt% copper sulfate inorganic salt in two reactors The aqueous solution is to prepare IDHA chelate manganese and IDHA chelate copper respectively, and mix the IDHA chelate manganese, IDHA chelate copper and DETPMP chelate zinc at a mass ratio of 1:1:1. Finally, a multi-trace element amino acid chelate fertilizer with a total zinc content of 0.1 wt%, a total manganese content of 0.1 wt% and a total copper content of 0.1 wt% is obtained.

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Abstract

The invention relates to the field of agriculture, and in particular relates to a chelated fertilizer and a preparation method thereof. The chelated fertilizer provided by the invention comprises diethylene triamine pentamethylene phosphonic acid chelated mineral element and iminodisuccinic acid chelated mineral element which can be used for realizing the full chelation of free trace metal elements, and solves the problem of seedling burnt caused by too fast releasing the nutritional ingredients of the chelated fertilizer, and the two cooperate with each other, so that the releasing of trace elements can be stable and lasting, the supply of the nutrients is more balanced, and the aims of increasing the benefit and yield are realized.

Description

technical field [0001] The invention relates to the field of agriculture, in particular to a chelate fertilizer and a preparation method thereof. Background technique [0002] With the increase of agricultural output, the application of chemical fertilizers has been increasing. For a long time, there has been a common phenomenon in my country that attaches great importance to macronutrients and despises microelements, which leads to the low content of microelements in the soil, which cannot meet the needs of crop growth, and also affects the absorption efficiency of macronutrient fertilizers. In recent years, trace element fertilizers have received special attention, and how to promote the absorption of trace elements by crops has become an important issue in the fertilizer industry. Several main metal trace elements, such as zinc, manganese, iron, copper, etc., in the soil with a pH value greater than 6, the ionic state is easy to form insoluble hydroxide precipitates and ...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 李旭王洪庆龙惊惊王远沈丽红
Owner SHENYANG RES INST OF CHEM IND
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