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Preparation method and system of ammonium adipate

An ammonium adipate and preparation system technology, which is applied in the production field of chemical products, can solve the problems of poor application of aluminum foil, uneven particles and high impurity content, and achieves the effects of being conducive to separation, uniform particles and high purity

Active Publication Date: 2018-05-04
NINGXIANG XINYANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the traditional preparation method of ammonium adipate, the obtained ammonium adipate is crystalline powder, and the preparation process mainly uses oven drying, which is easy to agglomerate during drying and use; and the impurity content is high, the purity is low, and the particles are uneven. Can not be well applied in the production of aluminum foil

Method used

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  • Preparation method and system of ammonium adipate
  • Preparation method and system of ammonium adipate
  • Preparation method and system of ammonium adipate

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Such as figure 2 As shown, the invention provides a kind of ammonium adipate preparation system, comprising:

[0052] Reactor 1, centrifuge 2, vibrating fluidized bed dryer 3, screen 4, packaging machine 5 connected in sequence;

[0053] The reaction kettle 4 is provided with a stirring device, a heating device, a water cooling device, a sampling port, an adipic acid feed port, an ammonia gas inlet, and a discharge port;

[0054] The ammonia gas inlet is provided with an ammonia flow rate control valve.

Embodiment 2

[0056] Such as figure 1 As shown, the present embodiment adopts the ammonium adipate preparation system provided in Example 1 to provide a method for preparing ammonium adipate, which is as follows:

[0057] S1. Inject 30% of the volume of purified water into the reaction kettle, and start stirring; the contents of chloride and iron salt in the above purified water are all less than 1 mg / kg;

[0058] S2. Seal the reaction kettle, turn on the vacuum to suck in adipic acid solids with a purity greater than 99%, then open the steam valve to heat the reaction kettle to 50° C., close the steam valve, continue stirring, and stir the adipic acid evenly;

[0059] S3, open the ammonia gas valve, feed the gasified ammonia gas into the reaction kettle, control the speed of ammonia gas flow, and ensure that the ammonia gas will not overflow; control the opening of the ammonia gas valve to 1 / 3; adipic acid: ammonia gas The molar ratio is 1:2;

[0060] S4, turn on the cooling water, add c...

Embodiment 3

[0068] The difference between this embodiment and embodiment 2 is:

[0069] S1. Inject 40% of the volume of purified water into the reactor;

[0070] S2, making the reaction kettle warm up to 60°C;

[0071] S3. Control the opening of the ammonia valve to 1 / 2; the molar ratio of adipic acid:ammonia is 1:1.8;

[0072] S5, stop passing ammonia, continue to react for 1.5h;

[0073] S6. When the temperature in the tank drops to 55-60°C, stop stirring, and after standing for 5 hours, restart stirring;

[0074] S8. The crystals are directly dried in a vibrating fluidized bed dryer. First, they are blown by hot air at 90°C, and then by natural wind after dehumidification. The total drying time is 3 minutes.

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Abstract

The invention relates to a preparation method and a preparation system of ammonium adipate. The preparation method comprises the following steps: enabling adipic acid in a reaction kettle to react with gasified ammonia gas; controlling the reaction temperature at 60-70 DEG C; monitoring whether the pH value of a solution reaches a reaction endpoint, opening a lid at a tank hole of the reaction kettle, carrying out sampling for reaction, stopping the introduction of ammonia, continuing to react for 1-1.5 hours, and introducing cooling water for cooling; after the temperature is decreased to bebelow 40 DEG C, carrying out sampling, starting discharging while detecting that the content of crystals is 50% or above, and carrying out solid-liquid separation by virtue of a centrifugal machine; and directly introducing the crystals into a vibrated fluidized bed drying machine, drying, and sieving by virtue of a screen, so as to obtain a finished product. The invention further provides a preparation method for preparing ammonium adipate by virtue of the preparation method. The ammonium adipate product prepared by virtue of the preparation method is white powder or a transparent crystal andhas low toxicity; and the product has good dissolving property in glycol and water, can be used as formation and middle-low-voltage electrolyte solute in the production processes of low-pressure aluminum foils and solid-state capacitors, and a water solution can be used as an electrifying agent for middle-high-pressure aluminum foils.

Description

technical field [0001] The invention belongs to the technical field of production of chemical products, and in particular relates to a preparation method and a preparation system of ammonium adipate. Background technique [0002] Ammonium adipate, its English name is ammonium adipate, its molecular formula is C 6 h 16 N 2 o 4 , with a molecular weight of 180.20, it is an organic raw material. Appearance is white crystalline powder, easy to agglomerate due to moisture; easily soluble in water and alcohol, pH 6.5-7.5, slightly acidic; stored in a sealed and dry place; CAS No.: 19090-60-9; E-C No.: 242-809- 3. [0003] Ammonium adipate is mainly used as the formation of low-voltage aluminum foil and solid capacitors and the solute of medium and low voltage electrolytes. The aqueous solution can also be used as a feeder for medium and high voltage aluminum foils, which can be used in capacitor production. Ammonium adipate is used as a working fluid in the production of ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C55/14C07C51/41C07C51/43
CPCC07C51/412C07C51/43C07C55/14
Inventor 石志勇
Owner NINGXIANG XINYANG CHEM
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