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Production technology and equipment for preparing ammonium sulfate through byproduct of tert-butylamine production process

A production process, ammonium sulfate technology, applied in ammonia compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of equipment corrosion, high energy consumption, difficult processing, etc., to increase the reaction time, reduce the number of pumps, The effect of improving utilization

Active Publication Date: 2014-12-17
ZIBO LUHUA HONGJIN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the distillation process, the treatment is difficult, the energy consumption is high, the equipment is severely corroded, and the processing conditions are poor; at the same time, a large amount of acidic wastewater generated during the distillation process has high COD and ammonia nitrogen content, and a large amount of odor gas

Method used

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  • Production technology and equipment for preparing ammonium sulfate through byproduct of tert-butylamine production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] As shown in the figure, an equipment for preparing ammonium sulfate by using the by-products in the production process of tert-butylamine, including ammonia neutralization cooling tower 1, solid-liquid separator 2, vacuum filtration tank 3, vacuum tank 4, heat exchanger 5, vacuum pump 6. Circulating centrifugal pump 7, first valve 8 and second valve 9.

[0026] The bottom of the ammonia neutralization cooling tower 1 communicates with the top of the solid-liquid separator 2 and the bottom of the vacuum tank 4 through pipelines, and the upper part of the ammonia neutralization cooling tower 1 communicates with the circulating centrifugal pump 7 through pipelines, and the ammonia neutralization cooling An air inlet 11 and a sulfuric acid inlet 12 are provided on the body of the tower 1. The connection between the tower body and the pipeline is the outlet or inlet, which will not be described here.

[0027] The top of the solid-liquid separator 2 is lower than the bottom ...

Embodiment 2

[0037] Different from Embodiment 1, in this embodiment, when the volume of crystals in the solid-liquid separator 2 reaches 60% of the total volume of solids and liquids, and at the same time ensure that the bottom of the observation port 21 is not exceeded, the second valve 9 is opened to displace the crystals. Put into the suction filtration in the vacuum filtration tank 3.

Embodiment 3

[0039] Different from Embodiment 1, in this embodiment, when the volume of crystals in the solid-liquid separator 2 reaches 90% of the total volume of solids and liquids, while ensuring that the bottom of the observation port 21 is not exceeded, the second valve 9 is opened to displace the crystals. Put into the suction filtration in the vacuum filtration tank 3.

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Abstract

The invention discloses production technology and production equipment for preparing ammonium sulfate through a byproduct of a tert-butylamine production process, and belongs to the technical field of preparation of chemical products. According to the production technology, a solid-liquid separator is added between an ammonia neutralizing and cooling column and a vacuum filtration tank; the ammonium sulfate solution can be cycled, so that the reaction time between ammonia and the ammonium sulfate solution is increased, and the ammonium sulfate reaches supersaturation; and the ammonium sulfate is crystallized, cooled and separated in a natural way instead of a distilled way, so that a great deal of steam can be saved. The production technology has the advantages that the air-containing mother liquor which is subjected to vacuum filtration is added to a vacuum tank and condensed by a heat exchanger, and therefore, the ammonium sulfate solution can be fully utilized, the emission of odorous gas can be reduced, and the purposes of energy conservation and environment friendliness are realized.

Description

technical field [0001] The invention belongs to the technical field of chemical product preparation, and in particular relates to a production process and equipment for preparing ammonium sulfate by using by-products in the production process of tert-butylamine. Background technique [0002] Ammonium sulfate, also known as ammonium sulfate, its theoretical molecular formula is (NH 4 ) 2 SO 4 . Ammonium sulfate is a strong acid and weak base salt that is easily soluble in water and its pure product is a colorless orthorhombic crystal. Density 1.769g / cm 3 . When heated, it decomposes and loses ammonia, and becomes an acid salt. At 513°C, it completely decomposes into ammonia and sulfuric acid. The industrial product is white or light gray-yellow granules, easily soluble in water, insoluble in ethanol, acetone and ammonia. Easy to deliquescence. It has been mainly used as a fertilizer for a long time and is suitable for various soils and crops. It can also be used in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01C1/242
Inventor 郑福国卢国强王荣军寇爱民郑鹏飞孙凤昌浦为民
Owner ZIBO LUHUA HONGJIN NEW MATERIAL CO LTD
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