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Technology for producing cyanuric acid-containing ammonium chloride from cyanurate-containing water

A technology of ammonium urate chloride and urate brine, applied in the fields of ammonium chloride, ammonium halide, organic chemistry, etc., can solve problems such as restrictions on the use of cyanuric acid, and achieve the effects of high added value of products, reasonable comprehensive utilization, and low energy consumption

Inactive Publication Date: 2019-04-12
CHINA LIGHT IND INT ENG CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, new market and environmental concerns have been created due to restrictions on the use of cyanuric acid in salt
Therefore, the application of the above-mentioned cyanurate-containing water process in actual production has limitations

Method used

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  • Technology for producing cyanuric acid-containing ammonium chloride from cyanurate-containing water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: take 100m 3 Water containing cyanurate (NaCl 90g / l, C 3 h 3 N 3 o 3 1g / l) is the raw material evaporated (temperature 100°C) and concentrated to obtain 25m 3 Salt saturated solution (NaCl 360g / l, C 3 h 3 N 3 o 3 4g / l); 25m 3 Salt saturated solution (NaCl 360g / l, C 3 h 3 N 3 o 3 4g / l), circulating ammonium mother liquor (NaCl 200g / l, C 3 h 3 N 3 o 3 8g / l, NH 4 Cl 270g / l) and 12.10 tons of ammonium bicarbonate (NH 4 HCO 3 ) after the metathesis reaction (reaction temperature 25°C) was separated to obtain 13.03 tons of sodium bicarbonate (NaHCO 3 ) and containing cyanuric acid (C 3 h 3 N 3 o 3 ), ammonium chloride (NH 4 Cl), sodium chloride (NaCl), ammonium bicarbonate (NH 4 HCO 3 ), ammonium carbonate ((NH 4 ) 2 CO 3 ) heavy alkali mother liquor (NaCl 70g / l, C 3 h 3 N 3 o 3 3g / l, NH 4 Cl 190g / l, NH 4 HCO 3 105g / l); Preheat the heavy alkali mother liquor to high temperature (temperature 100°C) to remove ammonium bicar...

Embodiment 2

[0027] Embodiment 2: take 100m 3 Water containing cyanurate (NaCl 100g / l, C 3 h 3 N 3 o 3 1g / l) is the raw material evaporated (temperature 100°C) and concentrated to obtain 33.3m 3 Salt saturated solution (NaCl 300g / l, C 3 h 3 N 3 o 33g / l); 33.3m 3 Salt saturated solution (NaCl300g / l, C 3 h 3 N 3 o 3 3g / l), circulating ammonium production mother liquor (NaCl 200g / l, C 3 h 3 N 3 o 3 8g / l, NH 4 Cl 270g / l) and 13.44 tons of ammonium bicarbonate (NH 4 HCO 3 ) after the metathesis reaction (reaction temperature 25°C) was separated to obtain 14.48 tons of sodium bicarbonate (NaHCO 3 ) and containing cyanuric acid (C 3 h 3 N 3 o 3 ), ammonium chloride (NH 4 Cl), sodium chloride (NaCl), ammonium bicarbonate (NH 4 HCO 3 ), ammonium carbonate ((NH 4 ) 2 CO 3 ) heavy alkali mother liquor (NaCl 70g / l, C 3 h 3 N 3 o 3 3g / l, NH4Cl 190g / l, NH 4 HCO 3 105g / l); Preheat the heavy alkali mother liquor to high temperature (temperature 100°C) to remove ammo...

Embodiment 3

[0028] Embodiment 3: take 100m 3 Water containing cyanurate (NaCl 80g / l, C 3 h 3 N 3 o 3 2g / l) is the raw material evaporated (temperature 100 ℃) and concentrated to obtain 25m 3 Salt saturated solution (NaCl 320g / l, C 3 h 3 N 3 o 3 8g / l); 25m 3 Salt saturated solution (NaCl 320g / l, C 3 h 3 N 3 o 3 8g / l), circulating ammonium production mother liquor (NaCl 200g / l, C 3 h 3 N 3 o 3 8g / l, NH 4 Cl 270g / l) and 10.76 tons of ammonium bicarbonate (NH 4 HCO 3 ) after the metathesis reaction (reaction temperature 25°C) was separated to obtain 11.58 tons of sodium bicarbonate (NaHCO 3 ) and containing cyanuric acid (C 3 h 3 N 3 o 3 ), ammonium chloride (NH 4 Cl), sodium chloride (NaCl), ammonium bicarbonate (NH 4 HCO 3 ), ammonium carbonate ((NH 4 ) 2 CO 3 ) heavy alkali mother liquor (NaCl 70g / l, C 3 h 3 N 3 o 3 8g / l, NH 4 Cl 190g / l, NH 4 HCO 3 105g / l); Preheat the heavy alkali mother liquor to high temperature (temperature 100°C) to remove amm...

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Abstract

A technology for producing cyanuric acid-containing ammonium chloride from cyanurate-containing water comprises the following steps: (1) conducting evaporating concentration on cyanurate-containing water as a raw material to obtain a salt saturation liquid, wherein the evaporating temperature is 40 to 130 DEG C; (2) conducting a metathesis reaction on the salt saturation liquid, an ammonium production mother liquor and ammonium bicarbonate at a reaction temperature of 20 to 50 DEG C, and then conducting separation to obtain sodium bicarbonate, and a heavy alkali mother liquor containing cyanuric acid, ammonium chloride, sodium chloride, ammonium bicarbonate and ammonium carbonate; (3), pre-heating the heavy alkali mother liquor at 80 to 150 DEG C for high-temperature removal of ammonium bicarbonate and ammonium carbonate, so as to obtain an ammonia-removed mother liquor containing cyanuric acid, ammonium chloride and sodium chloride; (4) evaporating the ammonia-removed mother liquor at5 to 130 DEG C, and conducting separation to obtain the cyanuric acid-containing ammonium chloride and an ammonium production mother liquor, wherein the ammonium production mother liquor is recycledto the metathesis reaction step in the step (2), and the cyanuric acid-containing ammonium chloride is directly used as a raw material for production of cyanuric acid and derivatives.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical industry, in particular to a process for producing ammonium chloride containing cyanurate from water containing cyanurate. Background technique [0002] The known production process of cyanurate-containing water: cyanurate-containing water will be produced during the production of cyanuric acid and its derivatives from purchased ammonium chloride and uric acid. At present, due to environmental protection restrictions, cyanurate-containing water must not be discharged, so Generally take evaporation to get cyanurate. However, the restricted use of cyanuric acid in salt has created new market and environmental concerns. Therefore, the application of the above-mentioned cyanurate-containing water process in actual production has limitations. Contents of the invention [0003] The purpose of the present invention is to provide a process for producing ammonium chloride containing cyanurat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/32C01C1/16
CPCC01C1/164C07D251/32
Inventor 彭赛军胡开宝田旭峰周恒杨骅朱晓峰葛小兵阙勇刘思伟刘大伟
Owner CHINA LIGHT IND INT ENG CO LTD
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