Method for preparing dendrobium officinale nutrient fertilizer

A technology of Dendrobium candidum and nutritional fertilizer, which is applied in the direction of potassium fertilizer, magnesium fertilizer, phosphate fertilizer, etc., can solve the problems of not meeting the needs of Dendrobium candidum, polluting the environment, and low absorption rate, achieving significant environmental protection value, significant economic value, and less fertilizer input Effect

Inactive Publication Date: 2015-01-21
GUIZHOU UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the purpose of the present invention is to provide a method for preparing Dendrobium candidum nutrient fertilizer, to solve the problem that the matching of nutrient elements in the existing fertilizer does not meet the needs of Dendrobium candidum for nutrient elements, resulting in the fertilizer applied to Dendrobium candidum being covered by candidum. The absorption rate of Dendrobium is low, and some elemental compounds remain in the soil, changing the structure of the soil and polluting the environment
At the same time, it solves the waste of a large amount of ammonium dihydrogen phosphate caused by incomplete crystallization of ammonium dihydrogen phosphate in the process of preparing ammonium dihydrogen phosphate products, and the excessive crystallization of ammonium dihydrogen phosphate will bring the ammonium dihydrogen phosphate product A large number of impurities, which in turn makes the technical problem of lower purity of the ammonium dihydrogen phosphate product

Method used

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  • Method for preparing dendrobium officinale nutrient fertilizer
  • Method for preparing dendrobium officinale nutrient fertilizer
  • Method for preparing dendrobium officinale nutrient fertilizer

Examples

Experimental program
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Embodiment 1

[0039] A method for preparing Dendrobium candidum nutritional fertilizer, comprising the steps of:

[0040] (1) Preparation of intermediates: first add phosphoric acid to the synthesis tank, then raise the temperature of phosphoric acid to 90°C, then add carbonamide to the synthesis tank to make it react with phosphoric acid, after 180 minutes of reaction, cool down the temperature After crystallization at 15°C, centrifuge to obtain the intermediate, the molar ratio of phosphoric acid to carbonamide is 1.2:1;

[0041] (2) Preparation of ammonium dihydrogen phosphate: send the intermediate obtained in step (1) into the synthesis tank, mix and react with ammonia gas at a molar ratio of 1:1.1 for 60 minutes, and control the reaction temperature by controlling the addition rate of ammonia gas 25°C, and adjust the pH value to 8.5, and the stirring speed is 240r / min. After the reaction is completed, the obtained slurry is added to the cooling crystallizer to circulate crystallizatio...

Embodiment 2

[0046] A method for preparing Dendrobium candidum nutritional fertilizer, comprising the steps of:

[0047] (1) Preparation of intermediates: first add phosphoric acid to the synthesis tank, then raise the temperature of phosphoric acid to 130°C, then add carbonamide to the synthesis tank to make it react with phosphoric acid, after 200 minutes of reaction, cool down the temperature After crystallization at 30°C, centrifuge to obtain the intermediate, the molar ratio of phosphoric acid to carbonamide is 1.4:1;

[0048] (2) Preparation of ammonium dihydrogen phosphate: send the intermediate obtained in step (1) into the synthesis tank, mix and react with ammonia gas at a molar ratio of 1:1.3 for 40 minutes, and control the reaction temperature by controlling the addition rate of ammonia gas 35°C, and adjust the pH value to 9.5, and the stirring speed is 220r / min. After the reaction is completed, the obtained slurry is added to the cooling crystallizer to circulate crystallizati...

Embodiment 3

[0053] A method for preparing Dendrobium candidum nutritional fertilizer, comprising the steps of:

[0054] (1) Preparation of intermediate: first add phosphoric acid to the synthesis tank, then raise the temperature of phosphoric acid to 110°C, then add carbonamide to the synthesis tank to make it react with phosphoric acid, after 190 minutes of reaction, cool down the temperature After crystallization at 20°C, centrifuge to obtain the intermediate, the molar ratio of phosphoric acid to carbonamide is 1.3:1;

[0055] (2) Preparation of ammonium dihydrogen phosphate: send the intermediate obtained in step (1) into the synthesis tank, mix and react with ammonia gas at a molar ratio of 1:1.2 for 50 minutes, and control the reaction temperature by controlling the addition rate of ammonia gas 30°C, and adjust the pH value to 9, and the stirring speed is 200r / min. After the reaction is completed, the obtained slurry is added to the cooling crystallizer to circulate crystallization,...

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Abstract

The invention relates to the technical field of chemical industry, and discloses a method for preparing a dendrobium officinale nutrient fertilizer. The method comprises the following steps: determining the proportion of nutritive elements in the dendrobium officinale nutrient fertilizer by analyzing various nutritive elements absorbed in a growth process of dendrobium officinale, reacting phosphoric acid with carbamide to generate an intermediate, then introducing ammonia gas into the intermediate to produce ammonium dihydrogen phosphate, separating part of ammonium dihydrogen phosphate by crystallization so as to control the content of nitrogen and phosphorus in a solution to meet the proportion required by the growth of dendrobium officinale, and then adding potassium and other medium trace element compounds into the solution to prepare a fertilizer special for dendrobium officinale. According to a production method disclosed by the invention, raw materials can be fully used, produced ammonium dihydrogen phosphate is relatively good in quality, and the prepared fertilizer special for dendrobium officinale is relatively low in cost.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for preparing Dendrobium officinale nutrient fertilizer. Background technique [0002] Ammonium dihydrogen phosphate, also known as monoammonium phosphate, is a chemical agent, a white crystal that decomposes into ammonium metaphosphate when heated. Ammonium dihydrogen phosphate can be used as a fertilizer and a fire retardant for wood, paper, and fabrics, as well as pharmaceuticals and ruminant feed additives. At present, the ammonium monohydrogen phosphate metathesis method used in the preparation of ammonium dihydrogen phosphate. It feeds water, potassium chloride, and ammonium bicarbonate in proportion, then adds a specified amount of phosphoric acid, stirs fully, adjusts the pH value, heats and concentrates, cools and crystallizes, centrifuges, and dries to obtain the product. The resulting concentrated mother liquor is multi-element compound fertilizer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05B7/00
CPCC05B7/00C05D1/00C05D3/00C05D5/00C05D9/00C05D9/02
Inventor 陈肖虎郑培俊高贵龙廖吉星薛涛林玉喜曾舒崔海波王丽远唐晓宁
Owner GUIZHOU UNIV
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