CN101070168B - Method for producing sodium nitrate - Google Patents

Method for producing sodium nitrate Download PDF

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Publication number
CN101070168B
CN101070168B CN 200710035217 CN200710035217A CN101070168B CN 101070168 B CN101070168 B CN 101070168B CN 200710035217 CN200710035217 CN 200710035217 CN 200710035217 A CN200710035217 A CN 200710035217A CN 101070168 B CN101070168 B CN 101070168B
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China
Prior art keywords
sodiumnitrate
sodium
mother liquid
salt
evaporation
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CN 200710035217
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Chinese (zh)
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CN101070168A (en
Inventor
彭赛军
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中国中轻国际工程有限公司
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Abstract

The invention offers a kind of method of producing sodium nitrate which belongs to technique field of inorganic chemical industry. This method uses the following raw material and steps to make sodium nitrate: 1. vaporize and dispose bittern solution and sodium nitrate vaporization mother liquor with certain volumetric ratio to get sodium nitrate mixture in the form of plasm; 2.separate solid and liquid, get salt-mixture of sodium sulfate and sodium chloride or sodium sulfate or sodium chloride and vaporization mother liquor to make salt; 3. vaporize and dispose vaporization mother liquor to make salt and get vaporization mother liquor to make salt in the form of plasm; 4. Separate solid and liquid, get vaporization mother liquor which continues to circulate and join in working procedure of salt preparation at high temperature using evaporation in step 1 and finished product of sodium nitrate. Utilizing ratio of raw material in this invention is high, quality of products is also high, with low energy consumption and production cost and it has no discharge of the three wastes.

Description

A kind of method of production SODIUMNITRATE

Technical field

The invention belongs to technical field of inorganic chemical industry, relating in particular to a kind of is the method for raw material production SODIUMNITRATE with bittern.

Background technology

The method of known production SODIUMNITRATE refers generally to NaNO 3(SODIUMNITRATE)-NaCl (sodium-chlor)-Na 2SO 4(sodium sulfate)-H 2O (water) system bittern is the method for raw material production SODIUMNITRATE.This method can be divided into two kinds, a kind of is mother liquor thermosol sodium nitre-cold crystallization SODIUMNITRATE method, another kind is that evaporation separates sal prunella-mother liquor cold crystallization SODIUMNITRATE method, wherein to exist mother liquor thermosol sodium nitre concentration low excessively for mother liquor thermosol sodium nitre-cold crystallization SODIUMNITRATE method, the problem that cold analysis mother liquor temperature is also low excessively, so just need to increase a large amount of steam and be used for heating up, make power consumption excessive; Sal prunella---mother liquor cold crystallization SODIUMNITRATE method exists the too high problem of steam consumption and evaporate separation, and the sal prunella mixing salt that it produced is contaminate environment also.Therefore, above-mentioned two kinds of methods all are unwell to NaNO 3-NaCl-Na 2SO 4-H 2The bittern of O system is as the raw material production SODIUMNITRATE.

Summary of the invention

The technical problem to be solved in the present invention is at the defective that prior art exists, to propose a kind of method of production SODIUMNITRATE, the operational path adaptation NaNO of this method 3-NaCl-Na 2SO 4-H 2The sodium sulfate of O system bittern and the variation of sodium chloride content, thereby can cut down the consumption of energy and reduce production cost, also do not influence environment protection simultaneously.

Technical solution of the present invention is that a kind of method of production SODIUMNITRATE, this method adopt following raw material and processing step to produce SODIUMNITRATE:

1, takes the NaNO of 0.5~1.5: 1.5~2.5 volumetric ratios successively 3-NaCl-Na 2SO 4-H 2O system aqueous salt brine or NaNO 3-NaCl-H 2O system aqueous salt brine or NaNO 3-Na 2SO 4-H 2O system aqueous salt brine and SODIUMNITRATE mother liquid evaporation carry out the mixture that conventional evaporation process gets pulpous state SODIUMNITRATE, sodium-chlor and/or sodium sulfate, 80 ℃-100 ℃ of vaporization temperatures;

2, the mixture of step 1 gained SODIUMNITRATE and sodium-chlor and/or sodium sulfate is carried out conventional solid-liquid separation and get sodium sulfate sodium-chlor mixing salt or sodium sulfate salt or sodium chloride salt and salt manufacturing mother liquid evaporation, the component span of gained salt manufacturing mother liquid evaporation is:

NaNO 3 220-1300g/l,

NaCl 30-290g/l,

Na 2SO 4 8-70g/l;

3, to step 2 gained salt manufacturing mother liquid evaporation carry out conventional low-temperature evaporation handle pulpous state salt manufacturing mother liquid evaporation;

4, step 3 gained pulpous state salt manufacturing mother liquid evaporation is carried out conventional solid-liquid separation and get SODIUMNITRATE mother liquid evaporation and SODIUMNITRATE finished product, 40 ℃-75 ℃ of vaporization temperatures.The component span of gained SODIUMNITRATE mother liquid evaporation is:

NaNO 3 500-800g/l,

NaCl 50-150g/l,

Na 2SO 4 10-40g/l。

Simultaneously, this SODIUMNITRATE mother liquid evaporation of gained continues the high temperature evaporation salt manufacturing operation that down circulation participates in above-mentioned steps 1.

Above-mentioned steps 2 gained sodium sulfate sodium-chlor mixing salts or sodium sulfate salt or sodium chloride salt are dissolved in the mixing condensation water that vapo(u)rization system produces, and can get sodium sulfate sodium-chlor mixing salt lysate or sodium sulfate salt lysate or sodium chloride salt lysate.

The invention has the beneficial effects as follows, by the theoretical rate of recovery of the SODIUMNITRATE of output of the present invention be 100%, the theoretical cycle rate of sodium sulfate and sodium-chlor is 100%, have significantly than the rate of recovery of known technology SODIUMNITRATE one way 20-90% and improve.The quality of product SODIUMNITRATE reaches acceptable end product standard (the contained NaNO of country's promulgation 3〉=99.3%), the technology whole process does not have the waste liquid discharge, has the high and quality product height of raw material availability, and energy consumption is low, production cost hangs down characteristics such as reaching three-waste free discharge.

Embodiment

Embodiment 1: the product of this embodiment of the invention adopts following raw material and step to make:

(1), gets NaNO 3Concentration is that 600g/l, NaCl concentration are 120g/l, Na 2SO 4Concentration is the NaNO of 30.0g/l 3-NaCl-Na 2SO 4-H 2O system aqueous salt brine 12.60m 3As raw material and NaNO 3Concentration is that 765g/l, NaCl concentration are 117g/l, Na 2SO 4Concentration is the SODIUMNITRATE mother liquid evaporation 26.49m of 15.1g/l 3Carry out conventional evaporation process after mixing preheating, get the mixture of pulpous state SODIUMNITRATE and sodium-chlor and sodium sulfate, 80 ℃ of vaporization temperatures;

(2), the mixture of step (1) gained SODIUMNITRATE and sodium-chlor and sodium sulfate is carried out conventional solid-liquid separation and get 1.89 tons of sodium sulfate sodium-chlor mixing salts and salt manufacturing mother liquid evaporation 29.31m 3, the component of gained salt manufacturing mother liquid evaporation is:

NaNO 3 927g/l,

NaCl 82.6g/l,

Na 2SO 4 13.3g/l。

(3), to step (2) gained 29.31m 3The salt manufacturing mother liquid evaporation carry out conventional low-temperature evaporation handle pulpous state salt manufacturing mother liquid evaporation;

(4), step (3) gained pulpous state salt manufacturing mother liquid evaporation is carried out conventional solid-liquid separation and get SODIUMNITRATE mother liquid evaporation 26.49m 3With 7.560 tons of SODIUMNITRATE finished products, 40 ℃ of vaporization temperatures.The component of gained SODIUMNITRATE mother liquid evaporation is:

NaNO 3 765g/l,

NaCl 117g/l,

Na 2SO 4 15.l/l。

This SODIUMNITRATE mother liquid evaporation of gained continues the high temperature evaporation salt manufacturing operation that down circulation participates in above-mentioned steps (1).

In addition, above-mentioned steps (2) gained sodium sulfate sodium-chlor mixing salt can be dissolved in the mixing condensation water that vapo(u)rization system produces and get sodium sulfate sodium-chlor mixing salt lysate.Carrier and nitric acid, barium carbonate compatibility that this lysate can be used as SODIUMNITRATE in the dissolving sodium nitre generate the mine use of nitrate of baryta solution input.

Embodiment 2: the product of this embodiment of the invention adopts following raw material and step to make:

(1), gets NaNO 3Concentration is that 600g/l, NaCl concentration are the NaNO of 120g/l 3-NaCl-H 2O system aqueous salt brine 12.60m 3As raw material and NaNO 3Concentration is that 765g/l, NaCl concentration are the SODIUMNITRATE mother liquid evaporation 26.49m of 117g/l 3Carry out conventional evaporation process after mixing preheating, get the mixture of pulpous state SODIUMNITRATE and sodium-chlor, 90 ℃ of vaporization temperatures;

(2), the mixture of step (1) gained SODIUMNITRATE and sodium-chlor is carried out conventional solid-liquid separation and get 1.89 tons of sodium chloride salts and salt manufacturing mother liquid evaporation 29.31m 3, the component of gained salt manufacturing mother liquid evaporation is:

NaNO 3 927g/l,

NaCl 82.6g/l。

(3), to step (2) gained 29.31m 3The salt manufacturing mother liquid evaporation carry out conventional low-temperature evaporation handle pulpous state salt manufacturing mother liquid evaporation;

(4), step (3) gained pulpous state salt manufacturing mother liquid evaporation is carried out conventional solid-liquid separation and get SODIUMNITRATE mother liquid evaporation 26.49m 3With 7.560 tons of SODIUMNITRATE finished products, 60 ℃ of vaporization temperatures.The component of gained SODIUMNITRATE mother liquid evaporation is:

NaNO 3 765g/l,

NaCl 117g/l。

This SODIUMNITRATE mother liquid evaporation of gained continues the high temperature evaporation salt manufacturing operation that down circulation participates in above-mentioned steps (1).

Embodiment 3: the product of this embodiment of the invention adopts following raw material and step to make:

(1), gets NaNO 3Concentration is 600g/l, Na 2SO 4Concentration is the NaNO of 30.0g/l 3-Na 2SO 4-H 2O system aqueous salt brine 12.60m 3As raw material and NaNO 3Concentration is 765g/l, Na 2SO 4Concentration is the SODIUMNITRATE mother liquid evaporation 26.49m of 15.1g/l 3Carry out conventional evaporation process after mixing preheating, get the mixture of pulpous state SODIUMNITRATE and sodium sulfate, 100 ℃ of vaporization temperatures;

(2), the mixture of step (1) gained SODIUMNITRATE and sodium sulfate is carried out conventional solid-liquid separation and get 1.89 tons of sodium sulfate salts and salt manufacturing mother liquid evaporation 29.31m 3, the component of gained salt manufacturing mother liquid evaporation is:

NaNO 3 927g/l,

Na 2SO 4 13.3g/l。

(3), to step (2) gained 29.31m 3The salt manufacturing mother liquid evaporation carry out conventional low-temperature evaporation handle pulpous state salt manufacturing mother liquid evaporation;

(4), step (3) gained pulpous state salt manufacturing mother liquid evaporation is carried out conventional solid-liquid separation and get SODIUMNITRATE mother liquid evaporation 26.49m 3With 7.560 tons of SODIUMNITRATE finished products, 75 ℃ of vaporization temperatures.The component of gained SODIUMNITRATE mother liquid evaporation is:

NaNO 3 765g/l,

Na 2SO 4 15.l/l。

This SODIUMNITRATE mother liquid evaporation of gained continues the high temperature evaporation salt manufacturing operation that down circulation participates in above-mentioned steps (1).

Claims (1)

1. method of producing SODIUMNITRATE, this method adopts following raw material and processing step to produce SODIUMNITRATE:
(1), takes the NaNO of 0.5~1.5: 1.5~2.5 volumetric ratios successively 3-NaCl-Na 2SO 4-H 2O system aqueous salt brine or NaNO 3-NaCl-H 2O system aqueous salt brine and SODIUMNITRATE mother liquid evaporation carry out conventional evaporation process, the mixture of pulpous state SODIUMNITRATE, sodium-chlor and sodium sulfate, the perhaps mixture of SODIUMNITRATE and sodium-chlor, 80 ℃-100 ℃ of vaporization temperatures;
(2), to the mixture of step (1) gained SODIUMNITRATE, sodium-chlor and sodium sulfate, perhaps the mixture of SODIUMNITRATE and sodium-chlor carries out conventional solid-liquid separation and gets sodium sulfate and sodium-chlor mixing salt or sodium chloride salt and salt manufacturing mother liquid evaporation, and the component span of gained salt manufacturing mother liquid evaporation is:
NaNO 3 220-1300g/l,
NaCl 30-290g/l,
Na 2SO 4 8-70g/l;
(3), to step (2) gained salt manufacturing mother liquid evaporation carry out conventional low-temperature evaporation handle pulpous state salt manufacturing mother liquid evaporation, 40 ℃-75 ℃ of vaporization temperatures;
(4), step (3) gained pulpous state salt manufacturing mother liquid evaporation carried out conventional solid-liquid separation get SODIUMNITRATE mother liquid evaporation and SODIUMNITRATE finished product, the component span of gained SODIUMNITRATE mother liquid evaporation is:
NaNO 3 500-800g/l,
NaCl 50-150g/l,
Na 2SO 4 10-40g/l;
This SODIUMNITRATE mother liquid evaporation of gained continues the conventional evaporation process that down circulation participates in above-mentioned steps (1).
CN 200710035217 2007-06-26 2007-06-26 Method for producing sodium nitrate CN101070168B (en)

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Application Number Priority Date Filing Date Title
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CN101070168B true CN101070168B (en) 2011-04-27

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102259897A (en) * 2010-05-31 2011-11-30 中国中轻国际工程有限公司 Continuous leaching process of nitratine
CN103041612B (en) * 2012-12-29 2014-06-25 化工部长沙设计研究院 Method for controlling sodium nitrate quality in vacuum cooling crystallization technology
CN105036222B (en) * 2015-08-19 2017-06-30 石家庄工大化工设备有限公司 A kind of recovery and treatment method of high-salt wastewater
CN107096249A (en) * 2016-02-22 2017-08-29 麦王环境技术股份有限公司 The high strong brine sub-prime crystallization complexes of Treated sewage reusing and handling process
CN106082282A (en) * 2016-06-06 2016-11-09 北京浦仁美华节能环保科技有限公司 The process for separating and purifying of sodium nitrate, sodium chloride and sodium sulphate in a kind of industry mixed salt waste water
CN106430253B (en) * 2016-09-05 2019-10-25 新疆硝石钾肥有限公司 Balanced recycle mother liquor method of purification based on evaporation salt making system
CN107934997B (en) * 2017-12-18 2019-11-22 中核二七二铀业有限责任公司 A method of sodium nitrate is produced using nuclear leve zirconium dioxide production waste discharge

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1257834A (en) * 1998-12-20 2000-06-28 内蒙古伊克昭化工研究设计院 Process and equipment for preparing bittern mirabilite and separating anhydrous sodium sulfide
CN1944256A (en) * 2006-10-25 2007-04-11 中国中轻国际工程有限公司 Process for producing sodium sulfate and sodium chloride in Na2SO4-NaCl-H2O system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1257834A (en) * 1998-12-20 2000-06-28 内蒙古伊克昭化工研究设计院 Process and equipment for preparing bittern mirabilite and separating anhydrous sodium sulfide
CN1944256A (en) * 2006-10-25 2007-04-11 中国中轻国际工程有限公司 Process for producing sodium sulfate and sodium chloride in Na2SO4-NaCl-H2O system

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