CN103449495B - A kind of utilization in titanium tetrachloride production reclaims the method that hydrochloric acid produces calcium chloride - Google Patents
A kind of utilization in titanium tetrachloride production reclaims the method that hydrochloric acid produces calcium chloride Download PDFInfo
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- CN103449495B CN103449495B CN201310388797.2A CN201310388797A CN103449495B CN 103449495 B CN103449495 B CN 103449495B CN 201310388797 A CN201310388797 A CN 201310388797A CN 103449495 B CN103449495 B CN 103449495B
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- calcium chloride
- hydrochloric acid
- chloride solution
- titanium tetrachloride
- reclaim
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Abstract
The invention discloses a kind of utilization in titanium tetrachloride production and reclaim the method that hydrochloric acid produces calcium chloride, adopt the hydrochloric acid and Ca (OH) that reclaim in chlorination process production titanium tetrachloride process
2for raw material, described hydrochloric acid and Ca (OH)
2be added in reaction tank by the mol ratio of 2:1.1 ~ 1.2 and react, utilize Ca (OH)
2regulate reacted calcium chloride solution pH value to reach 11 ~ 12, calcium chloride solution is left standstill 20 ~ 30 hours, make the titanium ion in calcium chloride solution generate Ti (OH)
6 2-flocks, detect the pH value of standing post chlorization calcium solution when 9 ~ 10 scope, by collection device, calcium chloride solution is collected, again by calcium chloride solution heating evaporation moisture, namely product calcium chloride is obtained after crystallisation by cooling, achieve in chlorination production the comprehensive utilization of reclaiming hydrochloric acid, the calcium chloride product produced can reach food grade, has good economic and social benefit.
Description
Technical field
The invention belongs to Calcium Chloride Production technical field, particularly utilize in titanic chloride production process and reclaim the method that hydrochloric acid produces calcium chloride.
Background technology
At present, it is generally adopt chlorine and rich titanium material in chlorination furnace, carry out boiling reaction to obtain titanium tetrachloride that chlorination process produces titanium tetrachloride, in process of production, owing to being subject to chlorination furnace system, the impacts such as material, containing a large amount of hydrogenchloride in chlorination furnace tail gas, this tail gas environmental pollution containing hydrogenchloride is serious, for this reason, chlorinated exhaust is all carried out absorption and obtains hydrochloric acid by each manufacturing enterprise, to produce the chlorination furnace of 120 tons of titanium tetrachlorides daily, annual about recyclable hydrochloric acid more than 20 tons, but, due to containing a large amount of titanium ions in the hydrochloric acid of this recovery, make this hydrochloric acid cannot directly apply in other field, because hydrochloric acid environmental pollution is larger, the man power and material of current processing mode at substantial, therefore, the hydrochloric acid comprehensive utilization how realizing reclaiming has become the technical problem underlying that titanium tetrachloride manufacturing enterprise faces, .
Summary of the invention
For solving problems of the prior art, the invention provides a kind of utilization in titanium tetrachloride production and reclaiming the method that hydrochloric acid produces calcium chloride, achieving effective utilization of reclaiming hydrochloric acid.
Technical scheme of the present invention is as described below:
The method that hydrochloric acid produces calcium chloride is reclaimed, described hydrochloric acid and Ca (OH) in utilizing titanium tetrachloride to produce
2be added in reaction tank by the mol ratio of 2:1.1 ~ 1.2 and react, utilize Ca (OH)
2when regulating reacted calcium chloride solution pH value to reach 11 ~ 12, calcium chloride solution is left standstill 20 ~ 30 hours, make the titanium ion in calcium chloride solution generate Ti (OH)
6 2-flocks, calcium chloride solution, 9 ~ 10 time, is collected by collection device, then by calcium chloride solution heating evaporation moisture, is namely obtained product calcium chloride after crystallisation by cooling by the pH value detecting standing post chlorization calcium solution.
Principle of the present invention is:
Utilize suitably excessive Ca (OH)
2titanium ion is converted into Ti (OH)
2, due to Ti (OH)
2be a kind of strong reductant, oxidizable is in atmosphere metatitanic acid (H
2tiO
3), reaction formula is 2Ti (OH)
2ten O
2=2H
2tiO
3, and metatitanic acid and Ca (OH)
2reaction can generate (Ti (OH)
6 2-) flocks.By this processing mode both can except effectively remove reclaim in hydrochloric acid with titanium ion, also make the calcium chloride of preparation up to standard.
Advantage of the present invention and beneficial effect are:
Achieve in chlorination production the comprehensive utilization of reclaiming hydrochloric acid, the calcium chloride product produced can reach food grade, has good economic and social benefit.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail, but should not be interpreted as that the scope of theme of the present invention is only limitted to following embodiment at this point, without departing from the idea case in the present invention described above, all make according to ordinary skill knowledge and customary means various amendments, replacement and change, include within the scope of the invention.
Embodiment one
1, reclaim the method that hydrochloric acid produces calcium chloride in utilizing titanium tetrachloride to produce, adopt the hydrochloric acid and Ca (OH) that reclaim in chlorination process production titanium tetrachloride process
2for raw material, hydrochloric acid and Ca (OH)
2be added in reaction tank by the mol ratio of 2:1.1 ~ 1.2 and react, utilize Ca (OH)
2when regulating reacted calcium chloride solution pH value to reach 11 ~ 12, calcium chloride solution is left standstill 20 ~ 30 hours, make the titanium ion in calcium chloride solution generate Ti (OH)
6 2-flocks, calcium chloride solution, 9 ~ 10 time, is collected by collection device, then by calcium chloride solution heating evaporation moisture, is namely obtained product calcium chloride after crystallisation by cooling by the pH value detecting standing post chlorization calcium solution.
The obtained calcium chloride product of the method for the present embodiment is utilized to reach food grade.
Embodiment two
Reclaim the method that hydrochloric acid produces calcium chloride in utilizing titanium tetrachloride to produce, adopt the hydrochloric acid and Ca (OH) that reclaim in chlorination process production titanium tetrachloride process
2for raw material, hydrochloric acid and Ca (OH)
2be added in reaction tank by the mol ratio of 2:1.1 and react, utilize Ca (OH)
2when regulating reacted calcium chloride solution pH value to reach 11, calcium chloride solution is left standstill 20 hours, make the titanium ion in calcium chloride solution generate Ti (OH)
6 2-flocks, calcium chloride solution, 9 time, is collected by collection device, then by calcium chloride solution heating evaporation moisture, is namely obtained product calcium chloride after crystallisation by cooling by the pH value detecting standing post chlorization calcium solution.
The obtained calcium chloride product of the method for the present embodiment is utilized to reach food grade.
Embodiment three
Reclaim the method that hydrochloric acid produces calcium chloride in utilizing titanium tetrachloride to produce, adopt the hydrochloric acid and Ca (OH) that reclaim in chlorination process production titanium tetrachloride process
2for raw material, hydrochloric acid and Ca (OH)
2be added in reaction tank by the mol ratio of 2:1.2 and react, utilize Ca (OH)
2when regulating reacted calcium chloride solution pH value to reach 12, calcium chloride solution is left standstill 30 hours, make the titanium ion in calcium chloride solution generate Ti (OH)
6 2-flocks, calcium chloride solution, when 10 scope, is collected by collection device, then by calcium chloride solution heating evaporation moisture, is namely obtained product calcium chloride after crystallisation by cooling by the pH value detecting standing post chlorization calcium solution.
The obtained calcium chloride product of the method for the present embodiment is utilized to reach food grade.
Embodiment four
Reclaim the method that hydrochloric acid produces calcium chloride in utilizing titanium tetrachloride to produce, adopt the hydrochloric acid and Ca (OH) that reclaim in chlorination process production titanium tetrachloride process
2for raw material, hydrochloric acid and Ca (OH)
2be added in reaction tank by the mol ratio of 2:1.1 and react, utilize Ca (OH)
2when regulating reacted calcium chloride solution pH value to reach 11, calcium chloride solution is left standstill 24 hours, make the titanium ion in calcium chloride solution generate Ti (OH)
6 2-flocks, calcium chloride solution, 9 time, is collected by collection device, then by calcium chloride solution heating evaporation moisture, is namely obtained product calcium chloride after crystallisation by cooling by the pH value detecting standing post chlorization calcium solution.
The obtained calcium chloride product of the method for the present embodiment is utilized to reach food grade.
In addition, in the various embodiments described above, the concentration of described hydrochloric acid is 20 ~ 30%.
Claims (1)
1. reclaim the method that hydrochloric acid produces calcium chloride in utilizing titanium tetrachloride to produce, it is characterized in that:
Utilize suitably excessive Ca (OH)
2titanium ion is converted into Ti (OH)
2, due to Ti (OH)
2be a kind of strong reductant, oxidizable is in atmosphere metatitanic acid (H
2tiO
3), reaction formula is 2Ti (OH)
2ten O
2=2H
2tiO
3, and metatitanic acid and Ca (OH)
2reaction can generate (Ti (OH)
6 2-) flocks;
Concrete steps are: described hydrochloric acid and Ca (OH)
2be added in reaction tank by the mol ratio of 2:1.1 and react, utilize Ca (OH)
2when regulating reacted calcium chloride solution pH value to reach 11 ~ 12, calcium chloride solution is left standstill 24 hours, make the titanium ion in calcium chloride solution generate Ti (OH)
6 2-flocks, calcium chloride solution, 9 ~ 10 time, is collected by collection device, then by calcium chloride solution heating evaporation moisture, is namely obtained product calcium chloride after crystallisation by cooling by the pH value detecting standing post chlorization calcium solution;
The concentration of described hydrochloric acid is 20 ~ 30%.
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| CN201310388797.2A CN103449495B (en) | 2013-08-30 | 2013-08-30 | A kind of utilization in titanium tetrachloride production reclaims the method that hydrochloric acid produces calcium chloride |
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|---|---|---|---|
| CN201310388797.2A CN103449495B (en) | 2013-08-30 | 2013-08-30 | A kind of utilization in titanium tetrachloride production reclaims the method that hydrochloric acid produces calcium chloride |
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| CN103449495A CN103449495A (en) | 2013-12-18 |
| CN103449495B true CN103449495B (en) | 2015-08-19 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834989B (en) * | 2014-02-24 | 2016-08-17 | 锦州钛业有限公司 | The technique that chloride waste water of chloride process titanium dioxide produces calcium sulfate crystal whiskers |
| CN112520777A (en) * | 2020-12-03 | 2021-03-19 | 山东鲁北企业集团总公司 | Process for preparing calcium chloride by using byproduct hydrochloric acid slag water of titanium white |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0986926A (en) * | 1995-09-29 | 1997-03-31 | Tosoh Corp | Production of calcium chloride solution |
| JP2000313606A (en) * | 1999-04-28 | 2000-11-14 | Tosoh Corp | Combined production of higher bleaching powder and aqueous solution of calcium chloride |
| CN100998914A (en) * | 2007-01-11 | 2007-07-18 | 张清 | Treatment method of low grade titanium-riched material chlorination dust collecting slag |
| CN101597081A (en) * | 2008-11-04 | 2009-12-09 | 中铝国际技术发展有限公司 | The condenser that gathers dust in the titanic chloride production process gather dust residues processing technique and equipment |
| CN102312102A (en) * | 2010-07-02 | 2012-01-11 | 成都理工大学 | Comprehensive utilization method for titanium-contained blast furnace slag |
| CN103028224A (en) * | 2011-10-09 | 2013-04-10 | 中国石油化工股份有限公司 | Method for treating titanium tetrachloride-containing waste liquid |
-
2013
- 2013-08-30 CN CN201310388797.2A patent/CN103449495B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0986926A (en) * | 1995-09-29 | 1997-03-31 | Tosoh Corp | Production of calcium chloride solution |
| JP2000313606A (en) * | 1999-04-28 | 2000-11-14 | Tosoh Corp | Combined production of higher bleaching powder and aqueous solution of calcium chloride |
| CN100998914A (en) * | 2007-01-11 | 2007-07-18 | 张清 | Treatment method of low grade titanium-riched material chlorination dust collecting slag |
| CN101597081A (en) * | 2008-11-04 | 2009-12-09 | 中铝国际技术发展有限公司 | The condenser that gathers dust in the titanic chloride production process gather dust residues processing technique and equipment |
| CN102312102A (en) * | 2010-07-02 | 2012-01-11 | 成都理工大学 | Comprehensive utilization method for titanium-contained blast furnace slag |
| CN103028224A (en) * | 2011-10-09 | 2013-04-10 | 中国石油化工股份有限公司 | Method for treating titanium tetrachloride-containing waste liquid |
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