NaCl-Na2SO4-H2O system and process for producing NaHCO3, NH4Cl and NaCl from NH4HCO3

A nacl-na2so4-h2o, production process technology, applied in the directions of alkali metal chlorides, ammonium halides, carbonate preparations, etc., can solve the problems of waste of resources, environmental pollution, application, etc., and achieve no three-waste emissions and raw material adaptability. Strong and low energy consumption

Inactive Publication Date: 2010-09-22
CHINA LIGHT IND INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Known as sodium chloride-sodium sulfate-water (NaCl-Na 2 SO 4 -H 2 O) system and ammonium bicarbonate (NH 4 HCO 3 ) to produce sodium bicarbonate) NaHCO 3 Process method, with NaCl-Na 2 SO 4 -H 2 O system Glauber's salt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: take 105.30m 3 NaCl-Na 2 SO 4 -H 2 O system Glauber's salt brine (NaCl 295g / l, Na 2 SO 4 18.27g / l) and 31.05 tons of ammonium bicarbonate (including NH 4 HCO 3 99.2%) as raw materials for metathesis reaction (reaction temperature 40°C) to separate and obtain 32.62 tons of sodium bicarbonate product and 116.38 m of soda-making mother liquor containing ammonium chloride, sodium sulfate and sodium chloride 3 (NaCl 71g / l, NaCl 2 SO 4 18.27g / l, NH 4 Cl 179g / l), high temperature (temperature 130°C) evaporation and separation of soda-making mother liquor to obtain 10.39 tons of mixed salt of sodium chloride and sodium sulfate and 75.09 tons of salt-making nitrate mother liquor 3 / h (NaCl 90g / l, NaCl 2 SO 4 19g / l, NH 4 Cl 437g / l), the salt-making nitric acid mother liquor was evaporated and separated at low temperature (temperature 50°C) to obtain 20.83 tons of ammonium chloride and 43.73m of ammonium-making mother liquor 3 / h (NaCl 133g / l, NaCl 2...

Embodiment 2

[0020] Embodiment 2: take 102.07m 3 NaCl-Na 2 SO 4 -H 2 O system Glauber's salt brine (NaCl 290g / l, Na 2 SO 4 20g / l) and 27.95 tons of ammonium bicarbonate (including NH 4 HCO 3 99.2%) as raw material for metathesis reaction (reaction temperature 45°C) to separate and obtain 29.36 tons of sodium bicarbonate product and 116.38 m of soda-making mother liquor containing ammonium chloride, sodium sulfate and sodium chloride 3 (NaCl 78g / l, NaCl 2 SO 4 20g / l, NH 4 Cl 161g / l), high temperature (temperature 130°C) evaporation and separation of soda-making mother liquor to obtain 11.41 tons of mixed salt of sodium chloride and sodium sulfate and 67.58m of salt-making nitrate mother liquor 3 / h(NaCl90g / l, NaCl 2 SO 4 19g / l, NH 4 Cl 437g / l), the salt-making nitric acid mother liquor was evaporated and separated at low temperature (temperature 50°C) to obtain 18.75 tons of ammonium chloride and 39.36m of ammonium-making mother liquor 3 / h (NaCl 133g / l, NaCl 2 SO 4 37g / ...

Embodiment 3

[0022] Embodiment 3: take 100.10m 3 NaCl-Na 2 SO 4 -H 2 O system Glauber's salt brine (NaCl 285g / l, Na 2 SO 4 30g / l) and 34.16 tons of ammonium bicarbonate (including NH 4 HCO 3 99.2%) as raw materials for metathesis reaction (reaction temperature 40°C) to separate and obtain 35.88 tons of sodium bicarbonate product and 116.38 m of soda-making mother liquor containing ammonium chloride, sodium sulfate and sodium chloride 3 (NaCl 70g / l, NaCl 2 SO 4 30g / l, NH 4 Cl 160g / l), high temperature (temperature 130°C) evaporation separation of soda-making mother liquor to obtain 11.64 tons of mixed salt of sodium chloride and sodium sulfate and 82.60m of salt-making nitrate mother liquor 3 / h(NaCl90g / l, NaCl 2 SO 4 19g / l, NH 4 Cl 437g / l), the salt-making nitric acid mother liquor was evaporated and separated at low temperature (temperature 50°C) to obtain 18.62 tons of ammonium chloride and 48.10m of ammonium-making mother liquor 3 / h (NaCl 133g / l, NaCl 2 SO 4 37g / l, NH...

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PUM

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Abstract

The invention provides a NaCl-Na2SO4-H2O system and a process for producing NaHCO3, NH4Cl and NaCl from NH4HCO3, comprising the following steps of: (1) carrying out double decomposition reaction on materials of mirabilite bittern and ammonium hydrogen carbonate and then separating to obtain an ammonium hydrogen carbonate product and an alkali-making mother solution containing ammonium chloride, sodium sulfate and sodium chloride, wherein the mirabilite bittern contains sodium chloride and sodium sulfate; (2) evaporating the alkali-making mother solution at high temperature and separating to obtain a mixed salt of sodium chloride and sodium sulfate and a mother solution of making sodium chloride and sodium sulfate; (3) distilling the mother solution of making sodium chloride and sodium sulfate at low temperature and separating to obtain ammonium chloride and an ammonium-making mother solution; (4) mixing the ammonium-making mother solution and the alkali-making mother solution, circulating, evaporating and separating the mixed salt of sodium chloride and sodium sulfate; (5) dissolving the mixed salt of sodium chloride and sodium sulfate in the mirabilite bittern containing sodium chloride and sodium sulfate, separating to obtain a sodium chloride mother solution and a washing mother solution and then introducing the washing mother solution to an integrated utilization system. The invention has the advantages of high quality of major product, strong material applicability, low cost, low energy consumption, no discharge of three wastes, and the like.

Description

technical field [0001] The invention relates to the field of inorganic chemical industry, in particular to a NaCl-Na 2 SO 4 -H 2 O system and NH 4 HCO 3 Production of NaHCO 3 , NH 4 Cl and NaCl process. Background technique [0002] Known as sodium chloride-sodium sulfate-water (NaCl-Na 2 SO 4 -H 2 O) system and ammonium bicarbonate (NH 4 HCO 3 ) to produce sodium bicarbonate) NaHCO 3 Process method, with NaCl-Na 2 SO 4 -H 2 O system Glauber's salt brine and NH 4 HCO 3 Production of NaHCO 3 , wherein, the discharge system of the soda-making mother liquor wastes resources and forms new environmental pollution problems. Therefore, this process cannot be applied in actual production. Contents of the invention [0003] The purpose of the present invention is to propose a new NaCl-Na 2 SO 4 -H 2 O system and NH 4 HCO 3 Production of NaHCO 3 , NH 4 Cl and NaCl process routes can greatly reduce energy consumption and cost, and solve the problem of environ...

Claims

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Application Information

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IPC IPC(8): C01D7/02C01D3/04C01C1/16
Inventor 彭赛军彭志成
Owner CHINA LIGHT IND INT ENG CO LTD
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