Thermal circulation technology of utilizing sodium sulfate solution or carrier to cogenerate sodium carbonate and ammonium sulfate

A technology of sodium sulfate solution and ammonium sulfate, applied in ammonium sulfate and carbonate preparations, etc., can solve the problems of high raw material cost, large circulation volume of ammonium precipitation mother liquor, and high power consumption of cold precipitation salt precipitation crystallization ammonium chloride , to achieve the effect of reducing energy consumption and cost, and high added value

Active Publication Date: 2015-02-18
CHINA LIGHT IND INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0037] Combined method of soda ash (cold combined soda method) needs to use solid sodium chloride as raw material, the cost of raw material is high, the power consumption of cold analysis, salting and crystallizati

Method used

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  • Thermal circulation technology of utilizing sodium sulfate solution or carrier to cogenerate sodium carbonate and ammonium sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Take 100 tons of Na 2 SO 4 (contains Na 2 SO 4 100%) and ammonia (NH 3 ), carbon dioxide (CO 2 ) obtained 111.3 tons of ammonium bicarbonate (containing NH 4 HCO 3 100%) solution is raw material, and 50.0 tons of sodium sulfate (Na 2 SO 4 ) after the metathesis reaction (reaction temperature 25°C) was separated to obtain 118.2 tons of sodium bicarbonate (NaHCO 3 ) and 400m containing ammonium bicarbonate, ammonium sulfate, sodium sulfate and ammonium carbonate 3 Soda making mother liquor (Na 2 SO 4 125g / L, (NH 4 ) 2 SO 4 232.5g / L, NH 4 HCO 3 +(NH 4 ) 2 CO 3 95g / L), 400m 3 High temperature deamination of soda mother liquor (temperature 100°C) to obtain 380m 3 Deamination mother liquor (Na 2 SO 4 131.6g / L, (NH 4 ) 2 SO 4 244.7g / L), 380m 3 Deamination mother liquor and 532m 3 Ammonium making mother liquor (Na 2 SO 4 68g / L, (NH 4 ) 2 SO 4 442g / L) mixed with high-temperature evaporation (temperature 130°C) to obtain 50.0 tons of sodium sulfate...

Embodiment 2

[0072] Take 100 tons of Na 2 SO 4 (contains Na 2 SO 4 100%) and ammonia (NH 3 ), carbon dioxide (CO 2 ) obtained 111.3 tons of ammonium bicarbonate (containing NH 4 HCO 3 100%) solution is raw material, and 48.0 tons of sodium sulfate (Na 2 SO 4 ) after the metathesis reaction (reaction temperature 20°C) was separated to obtain 118.2 tons of sodium bicarbonate (NaHCO 3 ) and 400m containing ammonium bicarbonate, ammonium sulfate, sodium sulfate and ammonium carbonate 3 Soda making mother liquor (Na 2 SO 4 120g / L, (NH 4 ) 2 SO 4 225g / L, NH 4 HCO 3 +(NH 4 ) 2 CO 3 90g / L), 400m 3 High temperature deamination of soda mother liquor (temperature 110°C) to obtain 383.6m 3 Deamination mother liquor (Na 2 SO 4 125.1g / L, (NH 4 )2 SO 4 234.6g / L), 383.6m 3 Deamination mother liquor and 510.6m 3 Ammonium making mother liquor (Na 2 SO 4 68g / L, (NH 4 ) 2 SO 4 442g / L) mixed with high-temperature evaporation (temperature 130°C) to obtain 48.0 tons of sodium sulfa...

Embodiment 3

[0074] Take 100 tons of Na 2 SO 4 (contains Na 2 SO 4 100%) and ammonia (NH 3 ), carbon dioxide (CO 2 ) obtained 111.3 tons of ammonium bicarbonate (containing NH 4 HCO 3 100%) solution is raw material, and 52.0 tons of sodium sulfate (Na 2 SO 4 ) after the metathesis reaction (reaction temperature 30°C) was separated to obtain 118.2 tons of sodium bicarbonate (NaHCO 3 ) and 400m containing ammonium bicarbonate, ammonium sulfate, sodium sulfate and ammonium carbonate 3 Soda making mother liquor (Na 2 SO 4 130g / L, (NH 4 ) 2 SO 4 235g / L, NH 4 HCO 3 +(NH 4 ) 2 CO 3 100g / L), 400m 3 High temperature deamination of soda mother liquor (temperature 105°C) to obtain 381.8m 3 Deamination mother liquor (Na 2 SO 4 125.1g / L, (NH 4 ) 2 SO 4 234.6g / L), 381.8m 3 Deamination mother liquor and 553.2m 3 Ammonium making mother liquor (Na 2 SO 4 68g / L, (NH 4 ) 2 SO 4 442g / L) mixed with high-temperature evaporation (temperature 130°C) to obtain 52.0 tons of sodium su...

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Abstract

The invention provides a thermal circulation technology of utilizing sodium sulfate solution or a carrier to cogenerate sodium carbonate and ammonium sulfate. The thermal circulation technology comprises the following steps: regarding an ammonium hydrogen carbonate solution prepared from sodium sulfate, ammonia and carbon dioxide as a raw material to be conducted with a replacement reaction, then carrying out separation to obtain sodium hydrogen carbonate (which can be calcined to obtain a pure alkali product) and an alkali preparing mother solution containing ammonium sulfate, sodium sulfate, ammonium hydrogen carbonate and ammonium carbonate; preheating the alkali preparing mother solution to a high temperature to remove ammonium hydrogen carbonate and ammonium carbonate, and then obtaining the deaminized mother solution containing ammonium sulfate and sodium sulfate; evaporating the deaminized mother solution at a high temperature to obtain sodium sulfate and a niter preparing mother solution; evaporating the niter preparing mother solution at a low temperature to obtain ammonium sulfate and an ammonium preparing mother solution; circulating the sodium sulfate to the replacement reaction working procedure; circulating the ammonium preparing mother solution to the deaminized mother solution high-temperature evaporation working procedure. The main products and byproducts prepared by thermal circulation technology disclosed by the invention are high in quality and added value; the thermal circulation technology is well-adapted in raw materials, low in sodium sulfate theoretical use ratio, production cost and energy consumption, closed circulating, free of three-waste discharge, and capable of saving energy and reducing emission.

Description

technical field [0001] The invention belongs to the field of inorganic chemical industry, in particular to a thermal cycle process for co-producing soda ash and ammonium sulfate from sodium sulfate solution or a carrier. Background technique [0002] Sodium Sulfate (Na 2 SO 4 ) is the ionized and generated salt of sulfate and sodium. Sodium sulfate is soluble in water and its aqueous solution is neutral. Soluble in glycerin but not in ethanol. Exposure to air easily absorbs water to form sodium sulfate decahydrate. At 241°C, sodium sulfate will transform into hexagonal crystals. Anhydrous sodium sulfate with high purity and fine particles is called yuanming powder, and sodium sulfate decahydrate is commonly known as mirabilite. [0003] Sodium sulfate widely exists in nature in the form of Glauber's salt, and is a widely used industrial raw material. The main uses are: [0004] 1. In the chemical industry, it is used to manufacture sodium sulfide sodium silicate water...

Claims

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Application Information

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IPC IPC(8): C01D7/16C01C1/24
Inventor 彭赛军彭志成
Owner CHINA LIGHT IND INT ENG CO LTD
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