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Synthesis technology of tetrasodium iminodisuccinate

A technology of tetrasodium iminodisuccinate and synthesis process, applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry and other directions, can solve problems such as environmental pollution, achieve simple equipment, safe and convenient operation, and rich product types Effect

Active Publication Date: 2017-06-13
济宁无内新材料技术研发中心(有限合伙)
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Problems solved by technology

Replace the air with nitrogen, some ammonia will be discharged together with the air, causing environmental pollution

Method used

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  • Synthesis technology of tetrasodium iminodisuccinate
  • Synthesis technology of tetrasodium iminodisuccinate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The fumaric acid that adopts in this implementation is food grade, and ammonium bicarbonate, water, alkali are industrial grade.

[0034] The fertilizer synergistic chelating agent-tetrasodium iminodisuccinate was prepared by the following process.

[0035] (1) In the 5 square enamel kettle, add 1587kg water successively, 1032kg fumaric acid, 352kg ammonium bicarbonate, stir;

[0036] (2) heat preservation at 50° C., and stir at 22 rpm for 10 h to obtain an iminodisuccinic acid solution;

[0037] (3) Add 32% (mass concentration) of liquid caustic soda 2225kg in the iminodisuccinic acid solution, obtain the tetrasodium iminodisuccinate solution of 5000kg30% (mass concentration). The finally obtained solid tetrasodium iminodisuccinate with a purity of 98% after removing water contains 1% unreacted fumaric acid and 1% malic acid.

[0038] The product that this embodiment obtains is carried out 1 H-NMR (D 2 O), the results please see the accompanying drawings figure 1 ...

Embodiment 2

[0040] (1) In the 5 square enamel kettle, add 1587kg water successively, 1032kg fumaric acid, 352kg ammonium bicarbonate;

[0041] (2) Stirring at a rate of 40 rpm for 7 hours at 60° C. under heat preservation to obtain an iminodisuccinic acid solution.

[0042] (3) Add 32% (mass concentration) of liquid caustic soda 2225kg in the iminodisuccinic acid solution, obtain the tetrasodium iminodisuccinate solution of 5000kg30% (mass concentration). The finally obtained solid tetrasodium iminodisuccinate after removing water has a purity of 95%, contains 1% unreacted fumaric acid and 4% malic acid.

[0043] The difference between this embodiment and Example 1 is: 1) In step a, the reaction temperature is increased by 60°C, the corresponding reaction rate is accelerated, and the reaction time is shortened to 6h; when the reaction temperature is increased, although the reaction rate is increased, the corresponding The side reaction also increases, and correspondingly in step b, produ...

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Abstract

The invention discloses a synthesis technology of a chelating agent-tetrasodium iminodisuccinate. The tetrasodium iminodisuccinate is obtained through atmospheric production of fumaric acid, ammonium bicarbonate and sodium hydroxide as raw materials. The preparation method is simple, convenient, low in cost and stable in effect; the obtained etrasodium iminodisuccinate is good in quality and high in purity, does not contain toxic substances such as fumaric acid, can be directly mixed with various fertilizers and is used as a fertilizer enhancing chelating agent.

Description

technical field [0001] The invention relates to the technical field of chelating agent preparation, in particular to a synthesis process of tetrasodium iminodisuccinate. Background technique [0002] With the development of reform and opening up, agriculture has achieved continuous high yields for many years under the extensive use of various chemical fertilizers (urea, compound fertilizers, etc.), ensuring the stability of grain production. However, with the successive years of high yields in agriculture, various nutrients in the soil have been consumed in large quantities, resulting in the degradation of soil fertility, especially the lack of trace metal nutrients, which has seriously threatened food security. [0003] The Ministry of Agriculture pointed out in the "Action Plan for Zero Growth in Fertilizer Use by 2020" that the current imbalance in fertilization structure is manifested in heavy macronutrient fertilizers and light and medium trace element fertilizers. [...

Claims

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Application Information

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IPC IPC(8): C07C227/06C07C229/24
CPCC07C227/06C07C229/24
Inventor 常领山张杰纯
Owner 济宁无内新材料技术研发中心(有限合伙)
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