CN1504412A - Method for making superfine calcium carbonate using exhaust gas and liquid from ammonia-soda process for producing sodium carbonate - Google Patents
Method for making superfine calcium carbonate using exhaust gas and liquid from ammonia-soda process for producing sodium carbonate Download PDFInfo
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- CN1504412A CN1504412A CNA021484082A CN02148408A CN1504412A CN 1504412 A CN1504412 A CN 1504412A CN A021484082 A CNA021484082 A CN A021484082A CN 02148408 A CN02148408 A CN 02148408A CN 1504412 A CN1504412 A CN 1504412A
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- calcium carbonate
- soda process
- exhaust gas
- soda ash
- superfine powder
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- Treating Waste Gases (AREA)
Abstract
A process for preparing ultra-fine calcium carbonate using discharged waste gas and waste fluid in sodium carbonate production by ammonia-soda process, comprising the steps of, filling auxiliary agent and solution into the distillation calcium chloride residual liquid discharged in sodium carbonate production through ammonia-soda process, obtaining filter liquid, purifying the carbon dioxide discharged in sodium carbonate production through ammonia-soda process, obtaining the calcium carbonate crystal through reacting with the obtained filter liquid, for the obtained calcium carbonate crystal proceeding cleaning, dewatering and drying to obtain ultra-fine calcium carbonate.
Description
Technical field
The present invention relates to a kind of preparation method of calcium carbonate superfine powder, particularly a kind of method of utilizing solvay soda process production soda ash exhaust gas discharged waste liquid to produce calcium carbonate superfine powder.
Background technology
It is a kind of traditional technology that soda ash is produced in solvay soda process, but utilization rate of raw materials is low when soda ash is produced in solvay soda process, and the waste discharge amount is very big, and its waste liquid exhaust gas discharging is contaminate environment seriously.So many countries particularly developed country stop using solvay soda process to produce soda ash gradually.And produce the waste solution of calcium chloride that soda ash is discharged with solvay soda process in the prior art, and its treatment process mainly is to produce Calcium dichloride dihydrate through artificial evaporation, its energy consumption height, and benefit is little, and the calcium chloride purposes is narrow, and market capacity is limited.
Technology contents
Technical problem to be solved by this invention is at the deficiencies in the prior art, proposes the low solvay soda process that utilizes that there is no problem of secondary pollution of a kind of efficent use of resources, cost and produces the method that soda ash exhaust gas discharged waste liquid is produced calcium carbonate superfine powder.
Technical problem to be solved by this invention is to realize by following technical scheme, and the present invention is a kind of method of utilizing solvay soda process production soda ash exhaust gas discharged waste liquid to produce calcium carbonate superfine powder, and its processing step is as follows:
(1) in the distillation calcium chloride raffinate that solvay soda process production soda ash discharges, adds auxiliary agent and solution, make it fully react back removal of impurities essence and filter, get filtrate.
(2) solvay soda process is produced the purifying carbon dioxide of soda ash discharging after, with the filtrate reaction of gained, calcium carbonate crystal.
(3) calcium carbonate crystal with gained washs, dehydration, and drying gets calcium carbonate superfine powder.
Technical problem to be solved by this invention can also further realize by following technical scheme, above-described a kind of method of utilizing solvay soda process production soda ash exhaust gas discharged waste liquid to produce calcium carbonate superfine powder, be characterized in that described solution is weakly acid soln.
Technical problem to be solved by this invention can also further realize by following technical scheme, above-described a kind of method of utilizing solvay soda process production soda ash exhaust gas discharged waste liquid to produce calcium carbonate superfine powder, be characterized in that described auxiliary agent can promote carbonic acid gas and calcium chloride raffinate to generate calcium carbonate crystal.
Compared with prior art, the present invention has following advantage: one, the invention belongs to the environmental protection comprehensive utilization, make full use of resource, turn waste into wealth, and the generation of whole process of production non-secondary pollution, have good social benefit; Two, what utilize that the inventive method finally obtains is the calcium carbonate superfine powder product, and its purposes is wide, has remarkable economic efficiency; Three, technology of the present invention is simple, and it is low to produce required cost, is fit to apply.
Embodiment
Embodiment.A kind of method of utilizing solvay soda process production soda ash exhaust gas discharged waste liquid to produce calcium carbonate superfine powder, its processing step is as follows:
(1) in the distillation calcium chloride raffinate that solvay soda process production soda ash discharges, adds auxiliary agent and weakly acid soln, make it fully react back removal of impurities essence and filter, get filtrate.Wherein, the auxiliary agent that is added can promote carbonic acid gas and calcium chloride raffinate to generate calcium carbonate crystal.
(2) solvay soda process is produced the purifying carbon dioxide of soda ash discharging after, with the filtrate reaction of gained, calcium carbonate crystal.
(3) calcium carbonate crystal with gained washs, dehydration, and drying gets calcium carbonate superfine powder.
Claims (3)
1, a kind of method of utilizing solvay soda process production soda ash exhaust gas discharged waste liquid to produce calcium carbonate superfine powder is characterized in that its processing step is as follows:
(1) in the distillation calcium chloride raffinate that solvay soda process production soda ash discharges, adds auxiliary agent and solution, make it fully react back removal of impurities essence and filter, get filtrate.
(2) solvay soda process is produced the purifying carbon dioxide of soda ash discharging after, with the filtrate reaction of gained, calcium carbonate crystal.
(3) calcium carbonate crystal with gained washs, dehydration, and drying gets calcium carbonate superfine powder.
2, a kind of method of utilizing solvay soda process production soda ash exhaust gas discharged waste liquid to produce calcium carbonate superfine powder according to claim 1 is characterized in that described solution is weakly acid soln.
3, a kind of method of utilizing solvay soda process production soda ash exhaust gas discharged waste liquid to produce calcium carbonate superfine powder according to claim 1 is characterized in that described auxiliary agent can promote carbonic acid gas and calcium chloride raffinate to generate calcium carbonate crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021484082A CN1504412A (en) | 2002-11-28 | 2002-11-28 | Method for making superfine calcium carbonate using exhaust gas and liquid from ammonia-soda process for producing sodium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021484082A CN1504412A (en) | 2002-11-28 | 2002-11-28 | Method for making superfine calcium carbonate using exhaust gas and liquid from ammonia-soda process for producing sodium carbonate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1504412A true CN1504412A (en) | 2004-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021484082A Pending CN1504412A (en) | 2002-11-28 | 2002-11-28 | Method for making superfine calcium carbonate using exhaust gas and liquid from ammonia-soda process for producing sodium carbonate |
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| CN (1) | CN1504412A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823737A (en) * | 2010-04-30 | 2010-09-08 | 汪晋强 | Method for co-production of ultra-fine calcium carbonate and sodium silicate in preparation of light magnesium carbonate by chlor-alkali brine sludge |
| CN101823738A (en) * | 2010-04-30 | 2010-09-08 | 汪晋强 | Method for co-production of fine calcium carbonate and sodium silicate, in preparation of light magnesium carbonate by chlor-alkali brine sludge |
| CN101823736A (en) * | 2010-04-30 | 2010-09-08 | 汪晋强 | Method for co-production of calcium carbonate and sodium silicate in preparation of light magnesium carbonate by chlor-alkali brine sludge |
| CN101837997A (en) * | 2010-04-30 | 2010-09-22 | 汪晋强 | Method for preparing magnesium carbonate and co-producing sodium carbonate and calcium sulfate from soda ash salt mud |
| CN104477962A (en) * | 2014-12-19 | 2015-04-01 | 华东理工大学 | Co-production method of calcium carbonate and hydrogen chloride gas by distilled ammonia waste liquid of sodium carbonate industry |
-
2002
- 2002-11-28 CN CNA021484082A patent/CN1504412A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101823737A (en) * | 2010-04-30 | 2010-09-08 | 汪晋强 | Method for co-production of ultra-fine calcium carbonate and sodium silicate in preparation of light magnesium carbonate by chlor-alkali brine sludge |
| CN101823738A (en) * | 2010-04-30 | 2010-09-08 | 汪晋强 | Method for co-production of fine calcium carbonate and sodium silicate, in preparation of light magnesium carbonate by chlor-alkali brine sludge |
| CN101823736A (en) * | 2010-04-30 | 2010-09-08 | 汪晋强 | Method for co-production of calcium carbonate and sodium silicate in preparation of light magnesium carbonate by chlor-alkali brine sludge |
| CN101837997A (en) * | 2010-04-30 | 2010-09-22 | 汪晋强 | Method for preparing magnesium carbonate and co-producing sodium carbonate and calcium sulfate from soda ash salt mud |
| CN101837997B (en) * | 2010-04-30 | 2011-12-21 | 汪晋强 | Method for preparing magnesium carbonate and co-producing sodium carbonate and calcium sulfate from soda ash salt mud |
| CN104477962A (en) * | 2014-12-19 | 2015-04-01 | 华东理工大学 | Co-production method of calcium carbonate and hydrogen chloride gas by distilled ammonia waste liquid of sodium carbonate industry |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |