Preparing process of EDDHA-Fe (ethydiaminedhephen acetic-Fe)

Abstract

The invention discloses a preparing process of EDDHA-Fe (ethydiaminedhephen acetic-Fe). The preparing process includes the steps of 1, weighing the materials by weight, dissolving phenol in water as heavy as the same, adding potassium permanganate, ethylene diamine solution, glyoxylic acid solution and sodium hydroxide solution in order at the temperature of 55 DEG C to 60 DEG C, with the sodium hydroxide solution accounting for 5 / 11 of the total quantity of the sodium hydroxide solution, and performing mixing to obtain EDDHA-Na solution; 2, heating the EDDHA-Na to 90 DEG C to 95 DEG C, adding the sodium hydroxide solution and iron oxide powder, and holding the temperature for 2h to obtain EDDHA-Fe solution, with the added sodium hydroxide solution accounting for 6 / 11 of the total quantity of the sodium hydroxide solution. The preparing method has the advantages that the cost is low, no three wastes or pollution occurs during generation, and the prepared EDDHA-Fe has the effect of improving growth and fruiting yield of crops.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilizers, and in particular relates to a preparation process of EDDHA chelated iron. Background technique [0002] As we all know, the healthy growth of plants, the increase of agricultural production, and the improvement of the quality of agricultural products are inseparable from the contribution of fertilizers. Judging from the actual situation of agricultural production in my country at this stage, the effective supplement of trace elements is particularly important, which has been gradually recognized by everyone. . Problems such as unreasonable fertilization, partial application of nitrogen fertilizer, imbalance of nitrogen, phosphorus and potassium, and serious shortage of soil organic matter have been generally paid attention to by farmers and agricultural technology departments, but the current balanced fertilization technology still stays at the balance level of nitrogen, phosphor...

AI Technical Summary

Problems solved by technology

Problems such as unreasonable fertilization, partial application of nitrogen fertilizer, imbalance of nitrogen, phosphorus and potassium, and serious shortage of soil organic matter have been generally paid attention to by farmers and agricultural technology departments, but the current balanced fertilization technology still stays at the balance level of nitrogen, phosphorus, potassium and organic matter. However, the lack of medium and trace elements is still one of the main problems hindering crop yields. The lack of scientific fertilization methods and the abuse of a large amount of sulfate have always affected the healthy development of agricultural production in our country.

[0003] The iron fertilizers currently on the market are still dominated by inorganic ferrous sulfate. The large application of ferrous sulfate is bound to be accompanied by extremely low absorption and utilization, which will cause serious damage to the soil structure and form soil compaction. A small amount of EDTA-Fe Also because of the high pH of the soil in northern my country, its absorption and utilization rate is extremely low. The sales of imported EDDHA chelated iron have increased rapidly in recent years. According to statistics, the domestic sales of imported EDDHA chelated iron are 80 million per year. It is estimated that Every year, companies such as Dutch Akzo-Robel, British Ciba, German BASF and Italian companies have successively invaded the Chinese market to carve up the huge Chinese high-end iron fertilizer market share. However, these imported EDDHA chelated iron is due to raw materials, The production process, transportation costs and other factors are limited, and the price is still relatively expensive, so that the application cost remains high and the application promotion process is relatively slow.

Images