CN109502617A - Basic aluminium chloride solution and its manufacturing method - Google Patents
Basic aluminium chloride solution and its manufacturing method Download PDFInfo
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- CN109502617A CN109502617A CN201811056906.XA CN201811056906A CN109502617A CN 109502617 A CN109502617 A CN 109502617A CN 201811056906 A CN201811056906 A CN 201811056906A CN 109502617 A CN109502617 A CN 109502617A
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- aluminium chloride
- alkali
- basic aluminium
- chloride solution
- basicity
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/56—Chlorides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/78—Compounds containing aluminium and two or more other elements, with the exception of oxygen and hydrogen
- C01F7/786—Compounds containing aluminium and two or more other elements, with the exception of oxygen and hydrogen containing, besides aluminium, only anions, e.g. Al[OH]xCly[SO4]z
Abstract
The present invention relates to basic aluminium chloride solution and its manufacturing method.The object of the present invention is to provide: there can be the manufacturing method of the basic aluminium chloride solution of high flocculating property and high storage stability with low cost production.Solution of the invention is the manufacturing method using basic aluminium chloride solution, which includes: for comprising by [Al2(OH)nCl(6‑n)]mThe alkali that alkali is added in the basic aluminium chloride solution of basic aluminium chloride shown in (0 < n < 6, m≤10) and basicity lower than 63% adds process；With the acid addition process that acid is added further later.
Description
Technical field
The present invention relates to the basic aluminium chloride solution used as flocculant etc. and its manufacturing method.
Background technique
Basic aluminium chloride (polyaluminium chloride (Poly Aluminum Chloride)；PAC) solution is the purification etc. with raw water
For the purpose of form aluminum sulfate and the flocculant that is widely used.The PAC is generally by [Al2(OH)nCl(6-n)]m(0<n<6、m≤
10) inorganic polymer shown in.OH in the polymer is known as basicity relative to the ratio of Al, by 45% or more basicity and
60% basic aluminium chloride solution below is widely used in original sub-block.
In recent years, the pollution of the raw water caused by the increase of the temporary rainfall of the brings such as concentrated heavy rainfall, due to
Raw water temperature caused by global warming rises and supervenes a large amount of algae etc., has muddiness object contained in raw water increased
Tendency.Therefore, seek the high PAC of flocculating property.
It is said that the PAC for being 65% or more by using the high PAC of basicity, particularly basicity, can be obtained with few additive amount
To high flocculating property.However, there is auto polymerization, the i.e. polymerization for hydrolyzing brought PAC in the aqueous solution of the PAC of high alkalinity
It is easy to promote, viscosity is easy the problem of getting higher.
On the other hand, PAC is in the form of aqueous solution, the preservation of the form of powder.The PAC system in the form of aqueous solution mostly originally
It makes, is saved, transported in the form of aqueous solution in general, using, it is (following to be sometimes referred to as with the aqueous solution of PAC in processed raw water
For " PAC solution ") form investment method.PAC solution is in used water treatment plant etc. with large-scale pump, blender and original
Water mixing.Therefore, the PAC solution with extremely high viscosity can apply load to these machines.In addition, according to the turbidity of raw water
Change and use PAC solution at any time, therefore, it is necessary to take care of the PAC solution measured to a certain degree for a long time.It is therefore desirable to PAC solution
At least after the not deterioration of performance, the increase of viscosity in half a year or longer time.
As the manufacturing method of previous PAC, have: method (1) makes the alumina gel of ease of solubility be dissolved in hydrochloric acid or salt
The aluminium salt of acid, obtains PAC；Method (2) adds calcium compound or in aluminum sulfate in the mixture of aluminium chloride and aluminum sulfate
Calcium chloride and calcium carbonate are added, sulfate ion is removed in the form of calcium sulfate (gypsum), obtains PAC；Method (3), normal
Under normal temperature and pressure, reacts the aluminium hydroxide for being insoluble in hydrochloric acid with hydrochloric acid in the case where heating pressured atmosphere, obtain PAC；Deng.
In order to obtain with the PAC solution of high basicity, be substantially carried out it is improving the method for aforementioned (1), by low alkali
The method of PAC solution and the alumina gel mixing of degree.For example, Patent Document 1 discloses a kind of method, the method is being filled
In the reaction vessel of water, under stiring, simultaneously injection be maintained pH6~9 range and basicity lower than 50% PAC solution and
Aqueous slkali generates alumina gel, adds obtained alumina gel in basic aluminium chloride solution of the basicity lower than 50%,
Manufacture the PAC solution of basicity 60%~80%.A kind of method is disclosed in patent document 2, the method is molten by basic aluminium chloride
Liquid and sodium aluminate solution are mixed in such a way that pH is as 4~11 range, prepare the liquid of salic gel, Er Qieyu
The basic aluminium chloride solution of basicity 25%~65% mixes, thus the PAC solution of manufacture such as basicity 45%~83.5%.
On the other hand, following method is disclosed in patent document 3 and 4: for obtaining respectively in the method for above-mentioned (3), (2)
Low alkalinity PAC solution, add alkali, so that basicity be made to be respectively increased to 60%~75%, 60%~70%.
It should be noted that present applicant is applied before the application as patent document 5 and in the application
Undocumented method is when application: by including the basic aluminium chloride solution for being lower than 63% for basicity, chloride ion is added
The chlorine of source and alkali add process, thus obtain basicity be 63% or more and 75% or less, viscosity be 5mPas or more and
200mPas basic aluminium chloride solution below.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 7-172824 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2014-024694 bulletin
Patent document 3: Japanese Unexamined Patent Application 51-106339 bulletin
Patent document 4: Japanese Unexamined Patent Application 53-1699 bulletin
Patent document 5: Japanese Patent Application 2017-151172 specification
Summary of the invention
Problems to be solved by the invention
The method of patent document 1 and patent document 2 is characterized in that, manufacture respectively alumina gel and PAC solution and
In both follow-up phase mixing/dissolutions.It is dissolved in alumina gel in the process in PAC solution, at low temperature aluminium oxide
The solution rate of gel is slow, and gelation carries out simultaneously with dissolution at high temperature.Therefore, in order to inhibit the viscosity of PAC solution to rise
While improve basicity, need the system such as whipping temp, mixing speed when adding speed, the dissolution of strict control alumina gel
Make condition.
In addition, due to the method for patent document 1 and patent document 2 manufacture respectively alumina gel and PAC solution and
Both follow-up phase mixing/dissolutions, therefore, it is necessary to use individual device fabrication alumina gel and PAC solution, there is also set
Standby quantity increase and cost get higher, the problem of production efficiency difference.
On the other hand, in the method for the PAC solution addition alkali of low alkalinity recorded in patent document 3,4, with alkali
The raising of degree, exist when adding alkali or PAC solution keeping in, PAC solution generate viscosity increase and the PAC solutions such as gelation
Storage stability deteriorate the problem of.
The present invention is in view of the above problems and actual conditions, it is therefore intended that, it provides: can have high flocculation with low cost production
The manufacturing method of the basic aluminium chloride solution of performance and high storage stability.
The solution to the problem
The inventors of the present invention further investigate, as a result, it has been found that: the PAC solution low for basicity is added alkali and improves basicity
Afterwards, PAC solution obtained from a small amount of acid is intentionally added with high flocculating property and high storage stability.
That is, the present invention in order to solve the above problems, provides a kind of basic aluminium chloride solution (target solution or high alkalinity PAC
Solution) manufacturing method comprising: for comprising by [Al2(OH)nCl(6-n)]mAlkalinity chlorination shown in (0 < n < 6, m≤10)
The alkali that alkali is added in the basic aluminium chloride solution (material solution or low alkalinity PAC solution) of aluminium and basicity lower than 63% adds process；
With the acid addition process that acid is added further later.
The effect of invention
According to the present invention it is possible to provide: can have high flocculating property and high storage stability with low cost production
The manufacturing method of basic aluminium chloride solution (target solution or high alkalinity PAC solution).
Detailed description of the invention
Fig. 1 is the figure for showing the structural formula of PAC.
Specific embodiment
Hereinafter, embodiments of the present invention will be described.It is said it should be noted that the scope of the present invention is not limited to these
It is bright, it can be suitable for changing and implementing in the range of not damaging purport of the invention other than example below.
In the present invention, a kind of manufacturing method of basic aluminium chloride solution (target solution or high alkalinity PAC solution) is provided,
It is characterized in that, comprising: for comprising by [Al2(OH)nCl(6-n)]mBasic aluminium chloride (PAC) shown in (0 < n < 6, m≤10) and
The alkali that alkali is added in basic aluminium chloride solution (material solution or low alkalinity PAC solution) of the basicity lower than 63% adds process；With it
The acid addition process of acid is further added afterwards.The basicity of the basic aluminium chloride solution obtained by this method is 63% or more and 75%
Below, viscosity is 5mPas or more and 200mPas or less.It should be noted that PAC solution is that contained PAC converts
The concentration of aluminium oxide when for aluminium oxide is in the range of 10~11 mass %, and JWWA K 154 can be used in the concentration of aluminium oxide
Disclosed method measurement.
The survey of method disclosed in JWWA (Japan Water Works Association, public good civic organization) K 154 can be used in the basicity of PAC
It is fixed.That is, the basicity of PAC is indicated with (n/6) × 100 (%) in the chemical formula of above-mentioned PAC, basicity 100% is n=6, due to
PAC does not contain Cl, therefore, it is intended that being aluminium hydroxide, basicity 0% is n=0, since PAC does not contain OH, therefore, it is intended that being chlorine
Change aluminium.From the viewpoint of flocculability and viscosity, the basicity of PAC preferably 63% or more and 75% or less, particularly preferred 65% with
It is upper and 73% or less.When the basicity of PAC is low, PAC's needed for muddy object is removed in the case that muddiness object contained in raw water is more
Amount increases, and when basicity is excessively high, the viscosity of PAC increases or easy gelation.
The viscosity of PAC solution refers to the absolute viscosity under room temperature (20~25 DEG C).In this specification, what the value of viscosity used
It is, with the value for utilizing the viscosity measurement of vibration viscometer to measure specified in JIS Z 8803:2011.If it is considered that making
The load of the pump of used time, blender, then the viscosity of PAC solution is 200mPas or less, preferably 100mPas or less, further
It is preferred that 50mPas or less.The lower limit of the viscosity of PAC solution is not particularly limited, and the viscosity of pure water is 1~2mPas,
Therefore the viscosity of the PAC solution obtained by method of the invention is usually 5mPas or more.It is obtained by method of the invention
Even if PAC solution have passed through half a year after fabrication, viscosity is also at 5mPas or more and 200mPas range below.
For the organic polymer for being considered having between the degree of polymerization and viscosity positive correlation, inorganic polymer base
This can not observe the example of monomer and polymer directly, there's almost no and be related to the research example of the degree of polymerization and viscosity.PAC's
In the case of, due to the known gelation with the progress of polymerization, therefore, it is considered that there is positive correlation between viscosity and the degree of polymerization.
That is, having the tendency that the initial polymerization degree of PAC is higher, viscosity is higher, it is believed that according to the size of viscosity, the big of the degree of polymerization can be compared
It is small.
It is considered in PAC having through the charge of the muddy object of neutralization and promotes the mutual flocculation of muddy object, removes muddy object
Effect, but in report in recent years, it was recently reported that the effect that specific charge neutralizes is bigger, and PAC is collected muddy in polymerization in raw water
Absurd creature forms muddiness object removal effect brought by flocculate.In general, then PAC solution has carried out pre-dilution in water treatment plant
It is mixed again with raw water.Think when using the degree of polymerization high PAC, due to its active height, since the prediluted stage,
The polymerization of PAC itself is generated in a part.As a result, will not sufficiently cause the polymerization more than it in raw water, therefore, it is considered that receiving
Ability, the ability of formation flocculate for collecting muddy object are poor, as a result muddy object poor removal effect.That is, being glued in the identical situation of basicity
Spending lower PAC solution has the tendency that muddy object removal effect is got higher.
The standard (JWWA K 154:2016) of the tap water of the Japan Water Works Association basicity of PAC is 45%~75%,
It is lower than 63% PAC solution as the basicity in the present invention, the basicity that commercially available product can be used is 45% or more and 60% or less
PAC solution.The manufacturing method of PAC of the basicity lower than 63% is not particularly limited, such as can obtain as follows: making hydrogen in water
After aluminium oxide and sulfuric acid reaction, calcium chloride and calcium compound are mixed, sulfate ion is removed as gypsum to obtain
It arrives.As calcium compound, calcium carbonate, calcium hydroxide, calcium oxide etc. can be used.Alternatively, it is also possible to using aluminium hydroxide and
Hydrochloric acid (aqueous solution of hydrogen chloride) mixing, using autoclave, more than 100 DEG C and more than the high temperature and high pressure atmosphere of 1 atmospheric pressure
The PAC solution of lower synthesis.But if be excessively high temperature and pressure, economy and worsening safety, therefore it is generally set to 200
DEG C or less and 10 atmospheric pressure below.
It should be noted that it is lower than 63% PAC solution (material solution or low alkalinity PAC solution) as basicity, it can be with
It is coagulated using alkali such as PAC solution (such as basicity be lower than 50% PAC solution) addition sodium carbonate low for basicity or with aluminium oxide
Glue mixes to improve basicity but PAC solution of the basicity lower than 63%.
In addition, the preferred 1mPas of viscosity of the PAC solution (low alkalinity PAC solution) as the basicity of raw material lower than 63%
Above and 50mPas or less, more preferable 2mPas or more and 20mPas or less, particularly preferred 2mPas or more and
10mPas or less.
Calcium carbonate, magnesium carbonate, sodium carbonate, potassium carbonate, hydrogen-oxygen can be used in the alkali added in alkali addition process of the invention
Change sodium, potassium hydroxide, magnesium hydroxide, calcium hydroxide etc., from reactive slow, basicity the easy aspect of control, preferably
Sodium carbonate.The additive amount of alkali can be lower than the basicity and PAC solution of 63% PAC solution according to the basicity of the object as addition
Target basicity and be suitable for adjustment, hydroxyl contained in the alkali of addition is former relative to the Al in PAC solution of the basicity lower than 63%
The ratio between son, i.e. [OH]/[Al] mol ratio preferably 0.15 or more, more preferable 0.42 or more, particularly preferred 0.5 or more.On the other hand,
In the case that additive amount is excessive, it may occur that gelation, it is therefore preferable that 1.8 or less, particularly preferred 1.5 or less.It needs to illustrate
It is, in the case that alkali is carbonate, as CO3 2-The OH of ion and 2 equivalents-Ion pair is answered, and the amount of hydroxyl can be calculated.
It should be noted that the chlorinations such as potassium chloride, calcium chloride, sodium chloride, magnesium chloride can not be added in alkali addition process
Object ion source.On the contrary, chloride ion source is inevitably in mixed situation, relative to PAC solution, chloride ion source
Amount preferably 0.1 mass % or less.It should be noted that adding in the applying date undocumented patent document 5 of the application in chlorine
It processes and adds chloride ion source and alkali in sequence, however, in the present embodiment, the difference lies in that not having in alkali addition process
Chloride ion source is applied in combination.In present embodiment, due to being added without chloride ion and alkali addition in alkali addition process
There is acid addition process after process, therefore the PAC solution that basicity is high and stability is high can be manufactured.
In the present invention, hydrochloric acid, sulfuric acid, nitric acid etc. is can be used in the acid added in acid addition process.But sulfuric acid addition is led
The increase of sulfate ion is caused, therefore, it is possible to which being unsatisfactory for sulfate ion concentration specified in the standard of JWWA is 3.5 matter
Measure % or less.In addition, nitric acid, which is added with, may be unsatisfactory for nitrate nitrogen specified in the standard of JWWA (nitrate nitrogen)
Concentration is 1.0mg/L or less.It is therefore preferable that using hydrochloric acid.It should be noted that addition acid contained in hydrogen atom relative to
It is the ratio between Al atom, i.e. [H]/[Al] mol ratio preferably 0.0012 or more in PAC solution of the basicity lower than 63%, particularly preferred
0.0092 or more.On the other hand, in the case that the additive amount of the acid of addition is excessive, become the basicity drop of obtained PAC solution
Low reason, therefore [H]/[Al] mol ratio preferably 0.92 or less, particularly preferred 0.46 or less.Wherein, [H]/[Al] mol ratio is
Less than the value of [OH]/[Al] mol ratio, difference preferably 0.2 or more, more preferable 0.5 or more.
Reactive tank used in the manufacturing method of the present invention is generating corrosion caused by chlorine, acid, therefore, it is desirable to gold
Category etc. carries out glass lining or rubber lining and uses.It as treatment conditions, can be heated or cooled, can also be added
It presses and implements, since industrial reaction speed is sufficiently fast, can implement at normal temperatures and pressures.In order to sufficiently be reacted,
Reaction time expectation 1 hour or more, from the viewpoint of manufacture efficiency, it is expected that within 24 hours.Alkali adds process and acid addition
In process, preferably it is stirred in reactive tank.
In the present invention, can use a reactive tank to manufacture the PAC solution that basicity is high and stability is high, therefore, with point
Not Zhi Zao alumina gel compared with PAC solution and in the method for both follow-up phase mixing/dissolutions, manufacture can be reduced
Cost.
PAC solution is the aqueous solution of the PAC shown in FIG. 1 as inorganic polymer.For addition of the alkali in PAC solution
For, from the H of the ligand as inorganic polymer2O base captures proton, converts to OH base, so that the activity of PAC be made to rise.It should
OH base generates the polymerization reaction between polymer and forms cross-linked structure, and thus the viscosity of PAC solution increases, when being more than certain limit
It will do it gelation.Think the addition at this time by acid in PAC solution, the proton and active high OH base generated by acid is preferential
In conjunction with therefore, the part terminated for keeping activity high reduces the activity of PAC solution and stabilizes.Therefore, molten in PAC by acid
Addition in liquid can inhibit the progress of polymerization.
Embodiment
Hereinafter, according to examples and comparative examples, PAC solution of the invention is described in detail.But the as long as present invention
It is just not limited to the following embodiments no more than its purport.
The production > of < low alkalinity PAC solution
It is dissolved in aluminium hydroxide in sulfuric acid, then mixes calcium chloride and calcium carbonate, by sulfate ion with gypsum
Form removal, obtains the PAC aqueous solution 100g of basicity 50%, viscosity 5.95mPas.
1 > of < embodiment
After adding sodium carbonate 8.2g in aforementioned low alkalinity PAC solution 100g, 36% aqueous hydrochloric acid solution 2.0g is added (with chlorine
The amount for changing hydrogen is calculated as 0.72g).Later, obtained reaction solution is filtered, so that insoluble ingredient be removed, is improved
The PAC solution of basicity.As a result, the basicity for the PAC solution made is 68%, viscosity 13.5mPas.
2~7 > of < embodiment
As recording in table 1, the additive amount of the alkali used as alkali, the additive amount of acid are changed, in addition to this, with implementation
Example 1 gets similarly the PAC solution of high alkalinity.
[measurement of basicity]
Basicity according to JWWA K 154:2016 benchmark and measure.
[viscosity]
Viscosity is using the vibration according to the viscosity measurement using vibration viscometer recorded in JIS Z 8803:2011
Dynamic formula viscosimeter VISCOMATE VM 100A (SEKONIC corporation) is measured under room temperature (25 DEG C).It needs to illustrate
Be viscosity is very high, handle in solid form in the case where, be judged as and gelation have occurred.
[floc test (levitated object separation test (Jar test))]
Levitated object separation test is also implemented according to the benchmark of JWWA K 154:2016, upper after measuring floc test
The turbidity of clear water.As a result, the turbidity of supernatant water is 0.4.
1 > of < comparative example
For the PAC solution of low alkalinity, various evaluations are carried out.
2 > of < comparative example
In the method for the production of the PAC solution of aforementioned low alkalinity, 1.5 times of calcium carbonate additive amount when synthesizing PAC, from
And obtain the PAC solution 100g of basicity 63%.Since a part has occurred that gelation, can not implement viscosimetric analysis and
Levitated object separation test.
3 > of < comparative example
Sodium carbonate 8.3g is added in the PAC solution 100g of low alkalinity.It is added without acid.Later, by obtained reaction solution
Filtering, so that insoluble ingredient be removed, obtains the PAC solution of basicity 67%, viscosity 214mPas.It is hanged using the PAC
Floating object body separation test, the turbidity after as a result testing are 0.9.
By PAC solution obtained in Examples 1 to 7, comparative example 1~3 evaluation result is shown in table 1.It should be noted that
Viscosity after just manufacturing for PAC solution is evaluated, after removing this also for half a year is taken care of under room temperature (20~25 DEG C)
Viscosity is evaluated.In addition, in Examples 1 to 7, the concentration of the aluminium oxide of the PAC solution of the PAC solution and high alkalinity of low alkalinity
It is in the range of 10~11 mass %.
[table 1]
According to the result of table 1, the basicity of PAC solution (the high alkalinity PAC solution) and comparative example 1 recorded in Examples 1 to 7
50% PAC solution is compared, and basicity is high, can inhibit the increase of viscosity, therefore, floc test as a result, muddiness can be removed
Object shows that flocculating property is excellent up to low turbidity.In addition, for the PAC solution recorded in Examples 1 to 7, after keeping half a year
Viscosity is also 9.2~26.9mPas, and maximum is also 200mPas or less.
In addition, a large amount of calcium carbonate are added in comparative example 2, when although synthesizing PAC solution by aluminium hydroxide, it is available to have
The PAC of the high alkalinity of basicity 63%, but viscosity is high, and gelation has occurred.In addition, in comparative example 3, in the PAC of basicity 50%
Alkali is added only to improve basicity, and is not added with acid, therefore the highly viscous PAC solution of available viscosity 214mPas, half a year
After gelation has occurred.That is, acid is not added with as comparative example 2~3, by changing initial investment composition, add aing base to reality
In the case where existing high basicity, viscosity be will increase, and the performance as PAC can reduce.
It should be noted that in comparative example 3, it is believed that viscosity is high, and polymerization has advanced into, this is received on polymerization side at one's side in raw water
The ability for collecting muddy object is poor, and compared with the embodiment 1 of same basicity, flocculating property is low, and it is lower to become the higher flocculation ability of basicity
Result.That is, the PAC solution for the Examples 1 to 7 that basicity is high, viscosity is low becomes the most excellent result of flocculation ability.
Claims (11)
1. a kind of manufacturing method of basic aluminium chloride solution comprising:
For comprising by [Al2(OH)nCl(6-n)]mBasic aluminium chloride shown in (0 < n < 6, m≤10) and basicity are lower than 63% alkali
Property liquor alumini chloridi be added alkali alkali add process；With,
The acid addition process of acid is further added later.
2. the manufacturing method of basic aluminium chloride solution according to claim 1, which is characterized in that the basic aluminium chloride of manufacture
The basicity of solution is 63% or more and 75% hereinafter, viscosity is 5mPas or more and 200mPas or less.
3. the manufacturing method of basic aluminium chloride solution according to claim 1 or 2, which is characterized in that the alkali be selected from
In the group be made of calcium carbonate, magnesium carbonate, sodium carbonate, potassium carbonate, sodium hydroxide, potassium hydroxide, magnesium hydroxide and calcium hydroxide
At least one.
4. the manufacturing method of basic aluminium chloride solution according to claim 1 or 2, which is characterized in that it is described acid for selected from
At least one of the group being made of hydrochloric acid, sulfuric acid and nitric acid.
5. the manufacturing method of basic aluminium chloride solution according to claim 1, which is characterized in that
The alkali is sodium carbonate,
The acid is hydrochloric acid.
6. the manufacturing method of basic aluminium chloride solution according to claim 1 or 2, which is characterized in that
In the alkali addition process, the molal quantity of hydroxyl contained in the alkali is lower than 63% basic aluminium chloride relative to basicity
The ratio between molal quantity of Al atom in solution, i.e. [OH]/[Al] mol ratio be 0.15 or more and 1.8 hereinafter,
In the acid addition process, the molal quantity of hydrogen atom contained in the acid is lower than 63% alkaline chlorination relative to basicity
The ratio between molal quantity of Al atom in aluminum solutions, i.e. [H]/[Al] mol ratio be 0.0012 or more and 0.92 hereinafter,
[H]/[Al] mol ratio is less than [OH]/[Al] the mol ratio.
7. the manufacturing method of basic aluminium chloride solution according to claim 1 or 2, which is characterized in that the alkali adds work
In sequence, chloride ion source is not added substantially.
8. a kind of manufacturing method of basic aluminium chloride solution comprising:
Make the process of aluminium hydroxide and sulfuric acid reaction in water；
The process that calcium chloride and calcium carbonate is added；
The calcium sulfate precipitated is removed, the process for obtaining basic aluminium chloride solution of the basicity lower than 63%；
The alkali that alkali is added for the basic aluminium chloride solution adds process；With,
The acid addition process of acid is further added later.
9. the manufacturing method of basic aluminium chloride solution according to claim 8, which is characterized in that the alkali adds process
In, do not add chloride ion source substantially.
10. a kind of manufacturing method of basic aluminium chloride solution comprising:
More than 100 DEG C and more than under the high temperature and high pressure atmosphere of 1 atmospheric pressure, reacts aluminium hydroxide with hydrochloric acid, obtain basicity
The process of basic aluminium chloride solution lower than 63%；
The alkali that alkali is added for the basic aluminium chloride solution adds process；With,
The acid addition process of acid is further added later.
11. the manufacturing method of basic aluminium chloride solution according to claim 10, which is characterized in that the alkali adds process
In, do not add chloride ion source substantially.
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| CN113292088A (en) * | 2021-05-19 | 2021-08-24 | 神华准能资源综合开发有限公司 | Method for producing low-magnesium and low-calcium alumina from crystalline aluminum chloride |
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| CN1086195A (en) * | 1992-10-24 | 1994-05-04 | 林传庆 | The production method of efficient water-purifying agent and products thereof polysulphide aluminium ferric chloride |
| CA2109756A1 (en) * | 1993-11-16 | 1995-05-17 | Rocco Giovanniello | Basic aluminum hydroxychlorosulfate process and product therefrom |
| CN1164510A (en) * | 1996-03-08 | 1997-11-12 | 埃勒夫阿托化学有限公司 | Process for preparation of basic polyaluminium chloro sulphates and applications thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113292088A (en) * | 2021-05-19 | 2021-08-24 | 神华准能资源综合开发有限公司 | Method for producing low-magnesium and low-calcium alumina from crystalline aluminum chloride |
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