CN109941970A - Utilize the method for aluminum aluminum sulfate concentration titanium white waste acid - Google Patents
Utilize the method for aluminum aluminum sulfate concentration titanium white waste acid Download PDFInfo
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- CN109941970A CN109941970A CN201910334068.6A CN201910334068A CN109941970A CN 109941970 A CN109941970 A CN 109941970A CN 201910334068 A CN201910334068 A CN 201910334068A CN 109941970 A CN109941970 A CN 109941970A
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- aluminum
- titanium white
- white waste
- waste acid
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Abstract
The invention discloses a kind of methods using aluminum aluminum sulfate concentration titanium white waste acid, belong to chemical field, the following steps are included: titanium white waste acid and aluminum aluminum sulfate are respectively placed in same closed container, the sulfuric acid for being 50~55% to get mass percentage concentration after the completion of to be concentrated.The method of the present invention completely avoids the use of boiler and evaporator, avoid the use of expensive resistant material, to reduce production cost, and operation it is at normal temperature or slightly hot under conditions of carry out, operating condition is significantly improved in this way, but also the economy of titanium white waste acid concentration is improved.
Description
Technical field
The invention belongs to chemical fields, and in particular to a method of titanium white waste acid is concentrated using aluminum aluminum sulfate.
Background technique
Titanium White Production By Sulfuric Acid Process will generate Waste Sulfuric Acid (abbreviation titanium white waste acid) and the green vitriol containing 7 crystallizations water
(FeSO4·7H2O), when using ilmenite concentrate, (main component is metatitanic acid iron FeTiO3, wherein TiO2Content be 45-50wt%) be
When raw material, 1 ton of titanium dioxide is generally produced by seven inkstone of output 3.5-4 ton, while generating 7~8 tons and containing 17~20% sulfuric acid
Titanium white waste acid.
Due to too big using the waste sulfuric acid solution quantum of output of method for producing gtitanium dioxide with sulphuric acid by-product, and contain a certain amount of sulphur
It is sour ferrous, so that this waste sulfuric acid solution can not be utilized in other fields using dilute sulfuric acid.Lime is generallyd use at present
In stone and generate calcium sulfate method titanium white waste acid is handled, however, obtained calcium sulfate there is no utility value and can only
Stockpiling, this does not utilize raw material not only well, but also biggish pressure can be caused to environment.Positive method is first to lead to
When crossing preliminary evaporation and concentration and improving the mass percentage concentration of sulfuric acid to 30%~40%, ferrous sulfate is isolated；Further
Evaporation and concentration becomes 50% or more sulfuric acid, returns to acidolysis operation, uses for continuous acidolysis, to completely be utilized.But
It is that the corrosivity of sulfuric acid solution at high temperature is extremely strong, it is desirable that be worth higher graphite material, while being concentrated by evaporation and needing large capacity
Steam boiler so that the equipment investment of this method is high and production cost is also high.
Summary of the invention
The technical problem to be solved by the present invention is to it is existing concentration titanium white waste acid method it is big to equipment corrosion, it is at high cost.
The technical solution of present invention solution above-mentioned technical problem are as follows: provide a kind of utilization aluminum aluminum sulfate concentration titanium white waste acid
Method, comprising the following steps: titanium white waste acid and aluminum aluminum sulfate are respectively placed in same closed container, after the completion of to be concentrated,
The sulfuric acid for being 50~55% up to mass percentage concentration.
Wherein, the above-mentioned method using aluminum aluminum sulfate concentration titanium white waste acid, the quality percentage of sulfuric acid in the titanium white waste acid
Concentration is 17~20%.
Wherein, it is above-mentioned using aluminum aluminum sulfate concentration titanium white waste acid method, the aluminum aluminum sulfate be anhydrous potassium aluminium sulfate or
Six water aluminum aluminum sulfates.
Wherein, the above-mentioned method using aluminum aluminum sulfate concentration titanium white waste acid, the quality of the titanium white waste acid and aluminum aluminum sulfate
Than for 1:0.72~5.
Wherein, the above-mentioned method using aluminum aluminum sulfate concentration titanium white waste acid, the quality of the titanium white waste acid and aluminum aluminum sulfate
Than for 1:0.72~2.
Wherein, the above-mentioned method using aluminum aluminum sulfate concentration titanium white waste acid, the temperature of the concentration are 10~38 DEG C.
Wherein, the above-mentioned method using aluminum aluminum sulfate concentration titanium white waste acid, the time of the concentration are 3~7 days.
Compared with prior art, the beneficial effects of the present invention are:
The method of the present invention completely avoids the use of boiler and evaporator, avoids the use of expensive resistant material,
To reduce production cost, and operate it is at normal temperature or slightly hot under conditions of carry out, significantly improve work in this way
Condition, but also the economy of titanium white waste acid concentration is improved.
The raw material sulphuric acid aluminium potassium that the present invention uses can recycle, and greatly reduce the cost of raw material.
Specific embodiment
Specifically, a kind of method using aluminum aluminum sulfate concentration titanium white waste acid, comprising the following steps: by titanium white waste acid and sulphur
Sour aluminium potassium is respectively placed in same closed container, the sulfuric acid for being 50~55% to get mass percentage concentration after the completion of to be concentrated.
The mass percentage concentration of sulfuric acid is 17~20% in titanium white waste acid used in the method for the present invention.
In method of the invention, in the method for the present invention, aluminum aluminum sulfate selection has hygroscopic anhydrous potassium aluminium sulfate or six
The better anhydrous potassium aluminium sulfate of water aluminum aluminum sulfate, preferably hygroscopicity.
In the method for the present invention, the dosage of aluminum aluminum sulfate and the time of concentration are to be mutually related: the dosage of aluminum aluminum sulfate is more,
Then concentration time is short, and the dosage of aluminum aluminum sulfate is few, then the time being concentrated is short.
A specific embodiment of the invention is further described below with reference to embodiment, is not therefore limited the present invention
System is among the embodiment described range.
Embodiment 1
By 100 grams of this Waste Sulfuric Acids, wherein the ferrous sulfate of sulfuric acid and 2%~3wt% containing 20wt%.It is anhydrous with 72 grams
Aluminum aluminum sulfate [KAl (SO4)2] be respectively placed in same closed container at normal temperature, (pay attention to two kinds of materials it is separated, cannot
Mixing).Two kinds of materials are taken out after 7 days, liquid is the sulfuric acid of 50~55wt%, and solid is Potassium aluminum sulfate dodecahydrate [KAl
(SO4)2·12H2O], the removing crystallization water is dried at 200~250 DEG C in solid phase, becomes anhydrous potassium aluminium sulfate [KAl (SO4)2] return
It returns and uses.The sulfuric acid of 50~55wt% can return to acidolysis and use for continuous acidolysis.
Embodiment 2
By 100 grams of this Waste Sulfuric Acids, wherein the ferrous sulfate of sulfuric acid and 2%~3wt% containing 20w%.It is anhydrous with 144 grams
Aluminum aluminum sulfate [KAl (SO4)2] be respectively placed in same closed container at normal temperature, (pay attention to two kinds of materials it is separated, cannot
Mixing).Two kinds of materials are taken out after 3.5 days, liquid is the sulfuric acid of 50~55wt%, and solid is six water aluminum aluminum sulfate [KAl
(SO4)2·6H2O], the removing crystallization water is dried at 200~250 DEG C in solid phase, becomes anhydrous potassium aluminium sulfate [KAl (SO4)2] return
It returns and uses.The sulfuric acid of 50~55wt% can return to acidolysis and use for continuous acidolysis.
Embodiment 3
In order to improve anhydrous potassium aluminium sulfate [KAl (SO4)2] utilization rate, can use " adverse current " mode of operation.
By the finally obtained six water aluminum aluminum sulfate [KAl (SO of solid phase of embodiment 24)2·6H2O] continue to give up with new 100 grams
Sulfuric acid is respectively placed at normal temperature in same closed container, (notice that two kinds of materials are separated, cannot mix).It is taken after 7 days
Two kinds of materials out, liquid are the sulfuric acid of 50wt%, and solid is Potassium aluminum sulfate dodecahydrate [KAl (SO4)2·12H2O], 200~
250 DEG C are dried the removing crystallization water, become anhydrous potassium aluminium sulfate [KAl (SO4)2] return to use.
The sulfuric acid of 50wt% continues and anhydrous potassium aluminium sulfate [KAl (SO4)2], it is respectively placed in same closed appearance at normal temperature
In device, (notice that two kinds of materials are separated, cannot mix).Two kinds of materials are taken out after 3.5 days, liquid is the sulfuric acid of 55wt%,
Acidolysis is returned to use for continuous acidolysis；Solid phase aluminum aluminum sulfate still has the space of water suction, continues to act on new Waste Sulfuric Acid, until its
It is saturated and becomes Potassium aluminum sulfate dodecahydrate [KAl (SO4)2·12H2O], the removing crystallization water is dried at 200~250 DEG C in solid phase,
Become anhydrous potassium aluminium sulfate [KAl (SO4)2] use is returned, liquid phase continues and new anhydrous potassium aluminium sulfate [KAl (SO4)2] effect,
Until its concentration reaches 55wt% and stops.
Claims (7)
1. utilizing the method for aluminum aluminum sulfate concentration titanium white waste acid, which comprises the following steps: by titanium white waste acid and sulfuric acid
Aluminium potassium is respectively placed in same closed container, the sulfuric acid for being 50~55% to get mass percentage concentration after the completion of to be concentrated.
2. utilizing the method for aluminum aluminum sulfate concentration titanium white waste acid according to claim 1, it is characterised in that: the titanium white waste acid
The mass percentage concentration of middle sulfuric acid is 17~20%.
3. utilizing the method for aluminum aluminum sulfate concentration titanium white waste acid according to claim 1, it is characterised in that: the aluminum aluminum sulfate
For anhydrous potassium aluminium sulfate or six water aluminum aluminum sulfates.
4. utilizing the method for aluminum aluminum sulfate concentration titanium white waste acid according to claim 1, it is characterised in that: the titanium white waste acid
Mass ratio with aluminum aluminum sulfate is 1:0.72~5.
5. utilizing the method for aluminum aluminum sulfate concentration titanium white waste acid according to claim 4, it is characterised in that: the titanium white waste acid
Mass ratio with aluminum aluminum sulfate is 1:0.72~2.
6. utilizing the method for aluminum aluminum sulfate concentration titanium white waste acid according to claim 1, it is characterised in that: the temperature of the concentration
Degree is 10~38 DEG C.
7. according to claim 1 using aluminum aluminum sulfate concentration titanium white waste acid method, it is characterised in that: the concentration when
Between be 3~7 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910334068.6A CN109941970A (en) | 2019-04-24 | 2019-04-24 | Utilize the method for aluminum aluminum sulfate concentration titanium white waste acid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910334068.6A CN109941970A (en) | 2019-04-24 | 2019-04-24 | Utilize the method for aluminum aluminum sulfate concentration titanium white waste acid |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4547353A (en) * | 1984-01-27 | 1985-10-15 | C-I-L Inc. | Apparatus and processes for the concentration of sulphuric acid |
| CN102910594A (en) * | 2012-11-06 | 2013-02-06 | 黄正源 | Method for concentrating waste sulfuric acid by utilizing waste heat of titanium dioxide calcinator |
| EP2643267A1 (en) * | 2010-11-22 | 2013-10-02 | Teijin Aramid B.V. | Method for increasing the sulfuric acid concentration of a sulfuric acid solution |
| CN104140082A (en) * | 2014-07-31 | 2014-11-12 | 四川龙蟒钛业股份有限公司 | Method for recycling titanium dioxide waste acid |
| CN106115634A (en) * | 2016-07-06 | 2016-11-16 | 钮德明 | A kind of method concentrating titanium white waste acid |
-
2019
- 2019-04-24 CN CN201910334068.6A patent/CN109941970A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4547353A (en) * | 1984-01-27 | 1985-10-15 | C-I-L Inc. | Apparatus and processes for the concentration of sulphuric acid |
| EP2643267A1 (en) * | 2010-11-22 | 2013-10-02 | Teijin Aramid B.V. | Method for increasing the sulfuric acid concentration of a sulfuric acid solution |
| CN102910594A (en) * | 2012-11-06 | 2013-02-06 | 黄正源 | Method for concentrating waste sulfuric acid by utilizing waste heat of titanium dioxide calcinator |
| CN104140082A (en) * | 2014-07-31 | 2014-11-12 | 四川龙蟒钛业股份有限公司 | Method for recycling titanium dioxide waste acid |
| CN106115634A (en) * | 2016-07-06 | 2016-11-16 | 钮德明 | A kind of method concentrating titanium white waste acid |
Non-Patent Citations (1)
| Title |
|---|
| 天津轻工业学院食品工业教学研究室: "《食品添加剂》", 31 January 2008, 中国轻工业出版社 * |
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Application publication date: 20190628 |