CN101823738A - Method for co-production of fine calcium carbonate and sodium silicate, in preparation of light magnesium carbonate by chlor-alkali brine sludge - Google Patents
Method for co-production of fine calcium carbonate and sodium silicate, in preparation of light magnesium carbonate by chlor-alkali brine sludge Download PDFInfo
- Publication number
- CN101823738A CN101823738A CN 201010169639 CN201010169639A CN101823738A CN 101823738 A CN101823738 A CN 101823738A CN 201010169639 CN201010169639 CN 201010169639 CN 201010169639 A CN201010169639 A CN 201010169639A CN 101823738 A CN101823738 A CN 101823738A
- Authority
- CN
- China
- Prior art keywords
- salt slurry
- chlor
- filter cake
- carbonate
- calcium carbonate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a method for co-production of fine calcium carbonate and sodium silicate, in the preparation of light magnesium carbonate by chlor-alkali brine sludge. In the method, brine sludge is filter-washed through a washing filter, and calcium compounds, magnesium compounds, silicon compounds and the like in the brine sludge are then respectively converted into magnesium carbonate, calcium carbonate and sodium silicate in an effective way through carbonation, filtration, centrifugation and the like. Therefore, the method fully develops the potential value of the brine sludge, and provides an economical and effective way for comprehensive utilization of the brine sludge.
Description
Technical field
The present invention relates to the production method of magnesiumcarbonate and lime carbonate, particularly, relate to a kind of method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry.
Background technology
The chlor-alkali salt slurry is from the pulpous state discharge that is produced in the refining crude salt process, and the sedimentary discharge of gained is a sea salt mud behind the salt solution separate part sodium-chlor.The main component of salt slurry is magnesium oxide, calcium oxide, silicon-dioxide, barium sulfate and a spot of sodium-chlor and mud.Thereby potential huge utility value.Yet at present, the salt slurry of most of producers is not effectively handled and is utilized, and only is used to build dykes and dams and roadbed material after the dehydration, perhaps stacks in factory throughout the year.Near perhaps directly entering rivers,lakes and seas, thus cause serious environmental to pollute.
The complicated component that salt slurry contains brings certain difficulty to industrial utilization, but because of its potential utility value, people also constantly explore the salt slurry utilization of waste material, are converted into the method for useful Industrial products.Application number is that 200310122805.5 patent of invention discloses a kind of technology of utilizing the chlor-alkali salt slurry to produce ultra-fine barium sulfate and lime carbonate, its process characteristic is a salt material-mud elder generation net filtration after filtration, dry, calcining obtains ultra-fine barium sulfate through technological processs such as dissolving with hydrochloric acid, separation, washing, drying, comminution by gas stream again; The filtrate of filtering gained adds ammoniacal liquor and transfers pH to remove impurity such as ferrimanganic, and the clear liquid after the removal of impurities adds volatile salt and tensio-active agent, stirs, reaction obtains calcium carbonate superfine powder.The advantage of this invention is utilization of waste material, has reduced environmental pollution, and produces ultra-fine barium sulfate and the lime carbonate obtain from salt slurry, for the comprehensive utilization of salt slurry provides a new way.Yet this is invented described technology and has only utilized barium sulfate and the calcium cpd that is contained in the salt slurry, magnesium compound and silicon compound are not utilized and excavation, thereby, be not the technology of the comprehensive utilization of an ideal salt slurry.
Therefore, in order fully to extract and utilize effective constituent in the salt slurry,, be necessary to carry out new exploration and research for the comprehensive utilization of salt slurry provides cost-effective approach.
Summary of the invention
For this reason, the invention provides a kind of method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry, compounds such as the calcium that contains in the salt slurry, magnesium, silicon are effectively extracted and utilized to this method, given full play to the potential value of salt slurry, for the comprehensive utilization of salt slurry provides cost-effective approach.
Technical scheme of the present invention is: a kind of method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry comprises the steps:
A:, remove the acid group impurity of solubility with washing filter (1) filter wash three times of chlor-alkali salt slurry; At this moment, contain in the salt slurry with magnesium oxide, calcium oxide and silicon-dioxide are the compound of main component;
B: steps A gained salt slurry is put in first carbonizer (2), and in first carbonizer (2) in according to salt slurry contained magnesium oxide and the mass ratio 1: 1.8～2.2 of carbonic acid gas pure substance feed carbon dioxides, carry out carburizing reagent; This moment, Magnesium hydrogen carbonate or magnesiumcarbonate were produced in the reaction of magnesium oxide and carbonic acid gas and water, and the two is water soluble all; Calcium oxide and carbon dioxide reaction are produced lime carbonate, and lime carbonate is water insoluble substantially, thereby precipitates;
C: step B products therefrom is filtered through first filter (4), obtain first filter cake and first settled solution; Be main component with lime carbonate and silicon-dioxide in described first filter cake; In first settled solution based on Magnesium hydrogen carbonate or magnesiumcarbonate;
Resulting first settled solution of D: step C obtains light-weight magnesiumcarbonate product (17) through slurry tank (5) thermal degradation, dry, selection by winnowing wrapping machine (7) packing of sedimentation moisture eliminator (6);
E: first filter cake and ammonium chloride that step C obtains are put into reaction in the corrosion-resistant reactor (8) according to the mass ratio 1: 0.87～1.27 of the pure substance of lime carbonate and ammonium chloride, generate calcium chloride and ammoniacal liquor and carbon dioxide, filter through second strainer (9), get second filter cake and second clear filtrate; Based on silicon-dioxide, its mass content reaches 80% in second filter cake; In second clear filtrate based on calcium chloride and ammoniacal liquor;
F: second clear filtrate that step e obtains is knocked down second carbonizer (10), with mass concentration is that 1～5% tensio-active agent carries out surface treatment, stir speed (S.S.) is 120～220r/min, and in second carbonizer (10), feed carbon dioxide, making calcium chloride and carbonic acid gas in second clear filtrate is 1: 0.19～0.59 to carry out carbonization according to the ratio of the quality of pure substance, product filters through the 3rd strainer (12), gets the 3rd filter cake of clarifying ammonium chloride filtrate and white; The 3rd filter cake is a lime carbonate;
G: the 3rd filter cake of the white of step e gained is through washing machine (13) washing, moisture eliminator (14) drying, pulverizer (15), obtains fine calcium carbonate product (18);
H: resulting second filter cake of step e is put into revolving horizontal drum reactor (16) lining with the mass ratio 1: 1.11～1.51 of the pure substance of sodium hydroxide with sodium hydroxide according to silicon-dioxide, reaction is hydrolyzed, the sodium silicate aqueous solution of reaction solution body is water glass (19).
Measure the carburizing reagent terminal point with the first carbonization table (3) among the step B.
Measure the carburizing reagent terminal point with the second carbonization table (11) in the step F.
Used carbon dioxide is pure carbon dioxide gas or carbonic acid gas volume content greater than 20% mixed gas in step B and the step F.
Described tensio-active agent is selected from emulsifiable concentrate, tween 80 and the mixture of the two.
Method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass of the present invention with the chlor-alkali salt slurry, its chemical equation is:
MgO+2CO
2+H
2O＝Mg(HCO
3)
2
MgO+CO
2＝MgCO
3
Mg(HCO
3)
2＝MgCO
3+H
2O+CO
2
CaCO
3+2NH
4Cl+H
2O＝CaCl
2+CO
2+2NH
4OH
CaCl
2+CO
2+2NH
4OH＝CaCO
3+2NH
4Cl+H
2O
SiO
2+2NaOH＝Na
2SiO
3+H
2O
Method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry of the present invention, effectively extract and utilized compounds such as the calcium that contains in the salt slurry, magnesium, silicon, given full play to the potential value of salt slurry, for the comprehensive utilization of salt slurry provides cost-effective approach.This method is simple, processing ease, and economic benefit is higher.
Description of drawings
Fig. 1 has showed method technical process of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry of the present invention, wherein,
(1): washing filter (2): first carbonizer (3): the first carbonization table
(4): first strainer (5): slurry tank (6): sedimentation moisture eliminator
(7): selection by winnowing wrapping machine (8): corrosion-resistant reactor (9): second strainer
(10): second carbonizer (11): the second carbonization table (12): the 3rd strainer
(13): washing machine (14): moisture eliminator (15): pulverizer
(16): revolving horizontal drum reactor (17): magnesiumcarbonate product (18): calcium carbonate product,
(19): water glass
Embodiment
Further describe and illustrate method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass of the present invention below in conjunction with specific embodiment, disclose materials such as the magnesium oxide that how to utilize method of the present invention to extract and utilize in the salt slurry to be contained, calcium oxide, silicon-dioxide with the chlor-alkali salt slurry.
Chlor-alkali salt slurry of the present invention is from the salt slurry that obtains for raw material salt manufacturing with sea salt.After testing, magnesian mass content is 19.34% in the used salt slurry of following embodiment, and the mass content of calcium oxide is 19%, and the mass content of silicon-dioxide is 21.88%.
Embodiment one
A kind of method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry, comprise the steps: washing filter (1) filter wash three times of 500kg chlor-alkali salt slurry, remove the acid group impurity of solubility, at this moment, contain in the salt slurry with magnesium oxide, calcium oxide and silicon-dioxide are the compound of main component; Then, the gained salt slurry is put in first carbonizer (2), and in first carbonizer (2), fed pure carbon dioxide gas, make magnesium oxide contained in the salt slurry and carbonic acid gas carry out carbonization at 1: 2.0 according to the mass ratio of pure substance; This moment, Magnesium hydrogen carbonate or magnesiumcarbonate were produced in the reaction of magnesium oxide and carbonic acid gas and water, and the two is water soluble all; Calcium oxide and carbon dioxide reaction are produced lime carbonate, and lime carbonate is water insoluble substantially, thereby precipitates; The carburizing reagent products therefrom being filtered through first filter (4), obtain first filter cake and first settled solution, is main component with lime carbonate and silicon-dioxide in described first filter cake, in first settled solution based on Magnesium hydrogen carbonate or magnesiumcarbonate; First settled solution obtains fine Magnesium Carbonate Light 41-45 product (17) through slurry tank (5) thermal degradation, dry, selection by winnowing wrapping machine (7) packing of sedimentation moisture eliminator (6); First filter cake and ammonium chloride are put into reaction in the corrosion-resistant reactor (8) according to the mass ratio of the pure substance of lime carbonate and ammonium chloride at 1: 1.27, generate calcium chloride and ammoniacal liquor and carbon dioxide, filter through second strainer (9), get second filter cake and second clear filtrate; Based on silicon-dioxide, its mass content reaches 80% in second filter cake; In second clear filtrate based on calcium chloride and ammoniacal liquor; Second clear filtrate is knocked down second carbonizer (10), with mass concentration is that 1% tensio-active agent emulsifiable concentrate is handled, stir speed (S.S.) is 220r/min, and the carbon dioxide containing gas volume is 25% mixed gas in second carbonizer (10), making calcium chloride and carbonic acid gas in second clear filtrate is to carry out carbonization at 1: 0.19 according to the ratio of the quality of pure substance, carbonation reaction temperature is controlled to be 10～20 ℃ of products and filters through the 3rd strainer (12), gets the 3rd filter cake of clarifying ammonium chloride filtrate and white; The 3rd filter cake is a lime carbonate; The 3rd filter cake of white is through washing machine (13) washing, moisture eliminator (14) drying, pulverizer (15), obtains fine calcium carbonate product (18); Second filter cake is put into revolving horizontal drum reactor (16) lining with the mass ratio of the pure substance of sodium hydroxide 1: 1.11 with sodium hydroxide according to silicon-dioxide, the reaction that is hydrolyzed, and the sodium silicate aqueous solution of reaction solution body is water glass (19).
Embodiment two
A kind of method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry, comprise the steps: washing filter (1) filter wash three times of 500kg chlor-alkali salt slurry, remove the acid group impurity of solubility, at this moment, contain in the salt slurry with magnesium oxide, calcium oxide and silicon-dioxide are the compound of main component; Then, the gained salt slurry is put in first carbonizer (2), and to feed the carbon dioxide containing gas volume in first carbonizer (2) be 25% mixed gas, makes magnesium oxide contained in the salt slurry and carbonic acid gas carry out carbonization at 1: 1.8 according to the mass ratio of pure substance; This moment, Magnesium hydrogen carbonate or magnesiumcarbonate were produced in the reaction of magnesium oxide and carbonic acid gas and water, and the two is water soluble all; Calcium oxide and carbon dioxide reaction are produced lime carbonate, and lime carbonate is water insoluble substantially, thereby precipitates; The carburizing reagent products therefrom being filtered through first filter (4), obtain first filter cake and first settled solution, is main component with lime carbonate and silicon-dioxide in described first filter cake, in first settled solution based on Magnesium hydrogen carbonate or magnesiumcarbonate; First settled solution obtains Magnesium Carbonate Light 41-45 product (17) through slurry tank (5) thermal degradation, dry, selection by winnowing wrapping machine (7) packing of sedimentation moisture eliminator (6); First filter cake and ammonium chloride are put into reaction in the corrosion-resistant reactor (8) according to the mass ratio of the pure substance of lime carbonate and ammonium chloride at 1: 1.0, generate calcium chloride and ammoniacal liquor and carbon dioxide, filter through second strainer (9), get second filter cake and second clear filtrate; Based on silicon-dioxide, its mass content reaches 80% in second filter cake; In second clear filtrate based on calcium chloride and ammoniacal liquor; Second clear filtrate is knocked down second carbonizer (10), with mass concentration is that 3% tensio-active agent is handled, stir speed (S.S.) is 180r/min, wherein containing mass concentration in the tensio-active agent and be 2% emulsifiable concentrate and mass concentration is 2% tween 80, and the carbon dioxide containing gas volume is 40% mixed gas in second carbonizer (10), making calcium chloride and carbonic acid gas in second clear filtrate is to carry out carbonization at 1: 0.30 according to the ratio of the quality of pure substance, carbonation reaction temperature is controlled to be 35～40 ℃, product filters through the 3rd strainer (12), gets the 3rd filter cake of clarifying ammonium chloride filtrate and white; The 3rd filter cake is a lime carbonate; The 3rd filter cake of white is through washing machine (13) washing, moisture eliminator (14) drying, pulverizer (15), obtains fine calcium carbonate product (18); Second filter cake is put into revolving horizontal drum reactor (16) lining with the mass ratio of the pure substance of sodium hydroxide 1: 1.35 with sodium hydroxide according to silicon-dioxide, the reaction that is hydrolyzed, and the sodium silicate aqueous solution of reaction solution body is water glass (19).
Embodiment three
A kind of method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry, comprise the steps: washing filter (1) filter wash three times of 500kg chlor-alkali salt slurry, remove the acid group impurity of solubility, at this moment, contain in the salt slurry with magnesium oxide, calcium oxide and silicon-dioxide are the compound of main component; Then, the gained salt slurry is put in first carbonizer (2), and the carbon dioxide containing gas volume is 40% mixed gas in first carbonizer (2), makes magnesium oxide contained in the salt slurry and carbonic acid gas carry out carbonization at 1: 2.2 according to the mass ratio of pure substance; This moment, Magnesium hydrogen carbonate or magnesiumcarbonate were produced in the reaction of magnesium oxide and carbonic acid gas and water, and the two is water soluble all; Calcium oxide and carbon dioxide reaction are produced lime carbonate, and lime carbonate is water insoluble substantially, thereby precipitates; The carburizing reagent products therefrom being filtered through first filter (4), obtain first filter cake and first settled solution, is main component with lime carbonate and silicon-dioxide in described first filter cake, in first settled solution based on Magnesium hydrogen carbonate or magnesiumcarbonate; First settled solution obtains Magnesium Carbonate Light 41-45 product (17) through slurry tank (5) thermal degradation, dry, selection by winnowing wrapping machine (7) packing of sedimentation moisture eliminator (6); First filter cake and ammonium chloride are put into reaction in the corrosion-resistant reactor (8) according to the mass ratio of the pure substance of lime carbonate and ammonium chloride at 1: 0.87, generate calcium chloride and ammoniacal liquor and carbon dioxide, filter through second strainer (9), get second filter cake and second clear filtrate; Based on silicon-dioxide, its mass content reaches 80% in second filter cake; In second clear filtrate based on calcium chloride and ammoniacal liquor; Second clear filtrate is knocked down second carbonizer (10), with mass concentration is that 5% tensio-active agent tween 80 is handled, stir speed (S.S.) is 120r/min, and to feed the carbon dioxide containing gas volume in second carbonizer (10) be 35% mixed gas, making calcium chloride and carbonic acid gas in second clear filtrate is to carry out carbonization at 1: 0.59 according to the ratio of the quality of pure substance, carbonation reaction temperature is controlled to be 10～15 ℃ of products and filters through the 3rd strainer (12), gets the 3rd filter cake of clarifying ammonium chloride filtrate and white; The 3rd filter cake is a lime carbonate; The 3rd filter cake of white is through washing machine (13) washing, moisture eliminator (14) drying, pulverizer (15), obtains fine calcium carbonate product (18); Second filter cake is put into revolving horizontal drum reactor (16) lining with the mass ratio of the pure substance of sodium hydroxide 1: 1.51 with sodium hydroxide according to silicon-dioxide, the reaction that is hydrolyzed, and the sodium silicate aqueous solution of reaction solution body is water glass (19).
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting the scope of the present invention, so all equivalences of being done with described feature of claim of the present invention and principle change or modify, all should be included within the claim scope of the present invention.
Claims (4)
1. a method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry is characterized in that, comprises the steps:
A: with washing filter (1) filter wash three times of chlor-alkali salt slurry;
B: steps A gained salt slurry is put in first carbonizer (2), and in first carbonizer (2) in according to salt slurry contained magnesium oxide and the mass ratio 1: 1.8～2.2 of carbonic acid gas pure substance feed carbon dioxides, carry out carburizing reagent;
C: step B products therefrom is filtered through first filter (4), obtain first filter cake and first settled solution;
Resulting first settled solution of D: step C obtains Magnesium Carbonate Light 41-45 product (17) through slurry tank (5) thermal degradation, dry, selection by winnowing wrapping machine (7) packing of sedimentation moisture eliminator (6);
E: first filter cake and ammonium chloride that step C obtains are put into reaction in the corrosion-resistant reactor (8) according to the mass ratio 1: 0.87～1.27 of the pure substance of lime carbonate and ammonium chloride, generate calcium chloride and reaction product such as ammoniacal liquor and carbon dioxide, reaction product is filtered through second strainer (9), gets second filter cake and second clear filtrate;
F: second clear filtrate that step e obtains is knocked down second carbonizer (10), with mass concentration is that 1～5% tensio-active agent carries out surface treatment, stir speed (S.S.) is 120～220r/min, and in second carbonizer (10), feed carbon dioxide, making calcium chloride and carbonic acid gas in second clear filtrate is 1: 0.19～0.59 to carry out carbonization according to the ratio of the quality of pure substance, product filters through the 3rd strainer (12), gets the 3rd filter cake of clarifying ammonium chloride filtrate and white;
G: the 3rd filter cake of the white of step e gained is through washing machine (13) washing, moisture eliminator (14) drying, pulverizer (15), obtains fine calcium carbonate product (18);
H: resulting second filter cake of step e is put into revolving horizontal drum reactor (16) lining with the mass ratio 1: 1.11～1.51 of the pure substance of sodium hydroxide with sodium hydroxide according to silicon-dioxide, reaction is hydrolyzed, the sodium silicate aqueous solution of reaction solution body is water glass (19).
2. method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry as claimed in claim 1, it is characterized in that, measure the carburizing reagent terminal point with the first carbonization table (3) among the step B, measure the carburizing reagent terminal point with the second carbonization table (11) in the step F.
3. method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry as claimed in claim 1, it is characterized in that used carbon dioxide is pure carbon dioxide gas or carbonic acid gas volume content greater than 20% mixed gas in step B and the step F.
4. method of producing Magnesium Carbonate Light 41-45 coproduction fine calcium carbonate and water glass with the chlor-alkali salt slurry as claimed in claim 1 is characterized in that described tensio-active agent is selected from emulsifiable concentrate, tween 80 and the mixture of the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101696394A CN101823738B (en) | 2010-04-30 | 2010-04-30 | Method for co-production of fine calcium carbonate and sodium silicate, in preparation of light magnesium carbonate by chlor-alkali brine sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101696394A CN101823738B (en) | 2010-04-30 | 2010-04-30 | Method for co-production of fine calcium carbonate and sodium silicate, in preparation of light magnesium carbonate by chlor-alkali brine sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101823738A true CN101823738A (en) | 2010-09-08 |
| CN101823738B CN101823738B (en) | 2012-02-15 |
Family
ID=42687938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101696394A Expired - Fee Related CN101823738B (en) | 2010-04-30 | 2010-04-30 | Method for co-production of fine calcium carbonate and sodium silicate, in preparation of light magnesium carbonate by chlor-alkali brine sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101823738B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9890081B2 (en) | 2015-09-02 | 2018-02-13 | Council Of Scientific & Industrial Research | Functionalized brine sludge material and a process for the preparation thereof |
| US11699533B2 (en) | 2020-10-19 | 2023-07-11 | Council Of Scientific And Industrial Research An Indian Registered Body Incorporated Under The Regn. Of Soc. Act (Act Xxi Of 1860) | Advanced lead-free radiation protection materials utilizing modified brine sludge composition and the process thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137488A (en) * | 1995-06-08 | 1996-12-11 | 福建省福州第二化工厂职工技术协会 | Process for preparing magnesium sulfate by using chlorine alkali offscum salt slurry |
| CN1297847A (en) * | 2000-12-06 | 2001-06-06 | 化学工业部连云港设计研究院 | Comprehensive utilization method of waste ammonia sode liquid and sodium sulfate containing waste liquid |
| CN1504412A (en) * | 2002-11-28 | 2004-06-16 | 欣 程 | Method for making superfine calcium carbonate using exhaust gas and liquid from ammonia-soda process for producing sodium carbonate |
| CN1554588A (en) * | 2003-12-25 | 2004-12-15 | 华东理工大学 | Process for producing super fine barium sulfate and calcium carbonate using chloralkali salt mud |
-
2010
- 2010-04-30 CN CN2010101696394A patent/CN101823738B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1137488A (en) * | 1995-06-08 | 1996-12-11 | 福建省福州第二化工厂职工技术协会 | Process for preparing magnesium sulfate by using chlorine alkali offscum salt slurry |
| CN1297847A (en) * | 2000-12-06 | 2001-06-06 | 化学工业部连云港设计研究院 | Comprehensive utilization method of waste ammonia sode liquid and sodium sulfate containing waste liquid |
| CN1504412A (en) * | 2002-11-28 | 2004-06-16 | 欣 程 | Method for making superfine calcium carbonate using exhaust gas and liquid from ammonia-soda process for producing sodium carbonate |
| CN1554588A (en) * | 2003-12-25 | 2004-12-15 | 华东理工大学 | Process for producing super fine barium sulfate and calcium carbonate using chloralkali salt mud |
Non-Patent Citations (1)
| Title |
|---|
| 《氯碱工业》 20060630 周莉菊等 浅谈氯碱装置区域布局及盐泥的处理方法 第3－6页 1-3 , 第6期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9890081B2 (en) | 2015-09-02 | 2018-02-13 | Council Of Scientific & Industrial Research | Functionalized brine sludge material and a process for the preparation thereof |
| US11699533B2 (en) | 2020-10-19 | 2023-07-11 | Council Of Scientific And Industrial Research An Indian Registered Body Incorporated Under The Regn. Of Soc. Act (Act Xxi Of 1860) | Advanced lead-free radiation protection materials utilizing modified brine sludge composition and the process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101823738B (en) | 2012-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102502720B (en) | Process for producing battery-grade lithium carbonate through processing carbonate type lithium concentrate by deep carbonation method | |
| CN100469697C (en) | Method for producing low-magnesium battery-stage lithium carbonate from lithium sulfate solution | |
| CN106745016B (en) | A method of separation and concentration lithium, aluminium, silicon from flyash | |
| CN101823736B (en) | Method for co-production of calcium carbonate and sodium silicate in preparation of light magnesium carbonate by chlor-alkali brine sludge | |
| CN101531384A (en) | Technique for preparing electronic grade magnesium hydrate and ammonium sulphate by cycle serum featuring in flue gas desulfurization by method of magnesium oxidization | |
| CN107032384B (en) | A method of separating and recovering calcium and magnesium from Calcium magnesium minerals | |
| CN101374767B (en) | An improved process for preparation of magnesium oxide | |
| CN111592017A (en) | Method for preparing battery-grade lithium chloride by pressing and soaking spodumene | |
| CN111115673A (en) | Method for utilizing all components of caustic sludge | |
| CN101823745B (en) | Method for producing super-fine light-weighted calcium carbonate, ammonium chloride and carbon powder with waste associated alkali solution and acetylene sludge | |
| CN101823737B (en) | Method for co-production of ultra-fine calcium carbonate and sodium silicate in preparation of light magnesium carbonate by chlor-alkali brine sludge | |
| CN101823738B (en) | Method for co-production of fine calcium carbonate and sodium silicate, in preparation of light magnesium carbonate by chlor-alkali brine sludge | |
| CN101838005B (en) | Method for producing sodium chloride and carbon powder and co-producing superfine light calcium carbonate and white carbon black | |
| CN101885504A (en) | Method for producing low-concentration liquid sodium hydroxide and co-producing calcium carbonate by using carbide slag | |
| CN101823746B (en) | Method for producing fine precipitated calcium carbonate and white carbon black coproduction sodium chloride and powdered carbon | |
| CN101823747B (en) | Method for producing precipitated calcium carbonate and white carbon black and coproducing sodium chloride and powdered carbon | |
| CN102086026A (en) | Method for producing potassium chlorate and co-producing superfine calcium carbonate and ammonium chloride by utilizing carbide slag | |
| CN101823744B (en) | Method for producing light-weighted calcium carbonate, ammonium chloride and carbon powder with waste associated alkali solution and acetylene sludge | |
| CN112174093B (en) | Method for producing bleaching powder by using carbide slag | |
| CN101805004A (en) | Method for producing calcium hydroxide and co-producing industrial salt and carbon powder by using carbide slag | |
| CN102070175A (en) | Method for producing barium sulfate to co-produce light magnesium carbonate and calcium carbonate by utilizing salt mud of rock salt | |
| CN101837993A (en) | Method for producing sodium hydroxide and co-producing calcium carbonate by using carbide slag | |
| CN102070174A (en) | Method for co-producing barium sulfate, light micro magnesium carbonate and calcium carbonate from rock salt slurry | |
| CN101823695A (en) | Method for co-production of light calcium carbonate and ammonium chloride in preparation of potassium chlorate by carbide slag | |
| CN101837997B (en) | Method for preparing magnesium carbonate and co-producing sodium carbonate and calcium sulfate from soda ash salt mud |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120215 Termination date: 20120430 |