WO2018209204A1 - Concentrated aqueous solutions of aluminum chlorohydrate monohydrate - Google Patents
Concentrated aqueous solutions of aluminum chlorohydrate monohydrate Download PDFInfo
- Publication number
- WO2018209204A1 WO2018209204A1 PCT/US2018/032276 US2018032276W WO2018209204A1 WO 2018209204 A1 WO2018209204 A1 WO 2018209204A1 US 2018032276 W US2018032276 W US 2018032276W WO 2018209204 A1 WO2018209204 A1 WO 2018209204A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solution
- aluminum chlorohydrate
- water
- less
- powder
- Prior art date
Links
Classifications
-
- 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
- C01F7/57—Basic aluminium chlorides, e.g. polyaluminium chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/32—Thermal properties
- C01P2006/33—Phase transition temperatures
- C01P2006/34—Melting temperatures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Definitions
- the present invention is directed to aluminum chlorohydrate products, and more particularly, to systems and processes for producing aluminum chlorohydrate products for use in the treatment of water and/or wastewater.
- ACH aluminum chlorohydrate
- hydrochloric acid aluminum chloride or basic aluminum chloride solutions.
- the aluminum metal typically contains up to 0.2 wt% iron.
- the iron acts like a catalyst and speeds up the reaction to form the ACH solution.
- the process produces ACH solutions of greater than 150 ppm as Fe. If a lower iron content is desired, extra processing steps are required to remove the iron from the ACH solution.
- ACHDH 50% aluminum chlorohydrate dihydrate
- the aluminum oxide concentration in the solution may range from about 24 wt % to about 27 wt %.
- the solution may have an iron content of between about 0 to about 70 ppm as Fe.
- FIG. 2 is a graph of the ultraviolet light absorption vs. amount of coagulant for a prior art aluminum chlorohydrate solution and solution made according to Example 7;
- FIG. 3 is a graph of the turbidity vs. amount of coagulant for a prior art aluminum chlorohydrate solution and solution made according to Example 7;
- FIG. 9 schematically shows a mixing system for forming a solution of aluminum chlorohydrate from aluminum chlorohydrate monohydrate powder according to embodiments of the present invention.
- Percent Basicity is defined as (%OH)(52.91)/(% Al). On a molar level, this may be expressed as ((OH)/(Al))/3 multiplied by 100. Thus, Al 2 (OH) 2 Cl 4 has a basicity of 33%.
- UV 254" is absorption of ultraviolet light at 254 nm though a 10 cm cuvette of water.
- Powder wetting and dispersion systems are commercially available systems that are specifically designed to wet and disperse powders into liquids. Most powder wetting and dispersion systems use induction created by a mixer or pump to suck the powder into the liquid and then shear the mixture to assure uniformity.
- ACHMH powder may be produced as described in U.S. Pat. Appl. Publ. No. 2016/0074873, which is incorporated by reference herein in its entirety. These ACHMH powders are mostly insoluble in cold water and solutions produced from these ACHMH powders are more efficient as flocculants than commercially available ACH solutions produced by prior art methods. Embodiments of the present invention produce solutions from these ACHMH powders that have a higher chloride content and hence a lower freezing point, and tend to require a somewhat lower basicity than similar solutions produced using ACHDH powder. The ACHMH powders are more economical to produce than the prior art since the process does not require expensive aluminum metal to produce the
- step 120 water is heated to at least about 120°F and less than about 200°F.
- the problem of putting a large volume of ACHMH powder into a small amount of liquid can be solved by starting with a base of ACH solution. As much or as little as practical may be used. For example, approximately 25% starting material may provide an adequate solution for solubilizing without an additional large capital expense for extra tankage.
- the ACH solution should be heated with all the water to above 150°F to make the solution according to embodiments of the present invention. If desired, the water can be heated above 150°F and added to the cooler ACH solution to allow the use of more economical materials of construction. Heat exchangers that can tolerate the corrosiveness of ACH are made of exotic metals or silicon carbide and are more expensive than those that simply heat water.
- FIG. 9 shows a mixing system 10, formed using a powder wetting and dispersion system, to form the aluminum chlorohydrate solution according to the process of FIG. 8.
- the mixing system 10 may include an agitated tank or mixing tank 12 for holding and mixing the liquids used and produced in the mixing system 10.
- the mixing tank 12 may be initially loaded with ambient temperature water and then the water may be circulated, using circulator pump 14, along path 16 and path 18, through a heat exchanger 20 that heats the water to at least about 150°F and less than the boiling temperature of the liquid, e.g., less than about 200°F.
- steam 22 may be an input to the heat exchanger 20 and condensate 24 may be removed from the heat exchanger 20.
- the heated water then returns along path 26 to the mixing tank 12.
- the water may be circulated in the mixing system 10 in this manner until all of the water in the mixing tank 12 has been heated to the desired temperature.
- the heated water may then be circulated along path 28, through an optional heat exchanger 30 that cools, and then introduced into a powder wetting and dispersion system 40.
- the heat exchanger 30 may include a cooling water supply 32 as an input and a cooling water return 34 as an output.
- the heat exchanger 30 may be set with an exit temperature of ambient to about 140°F, preferably between about 120°F and about 130°F.
- the ACHMH powder may be held in a hopper 36 and gradually added to the powder wetting and dispersion system 40 along with the heated water to form a solution of aluminum chlorohydrate.
- the aluminum chlorohydrate solution is then returned back to the mixing tank 12 along path 42 where the aluminum chlorohydrate solution is mixed with the heated water.
- the heated solution is then circulated back through path 16 and path 28, through the heat exchanger 30 to the powder wetting and dispersion system 40 to be combined with the ACHMH powder and then the aluminum chlorohydrate solution is returned to the mixing tank 12 along path 42.
- Some of the heated solution from the mixing tank 12 may be circulated back along path 18 through the heat exchanger 20, along path 26 and back to the mixing tank 12 in order to keep the aluminum chlorohydrate solution at a desired temperature.
- the process continues until all the ACHMH powder is dispensed from the hopper 36 and added into the aluminum chlorohydrate solution.
- FIGS. 1-3 are graphs showing the turbidity and ultraviolet light absorption versus the amount of coagulant for the solution made according to Example 7 compared to the prior art. Tables 1-3 below show the data for FIGS. 1-3, respectively.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2019013369A MX2019013369A (en) | 2017-05-12 | 2018-05-11 | Concentrated aqueous solutions of aluminum chlorohydrate monohydrate. |
BR112019023284A BR112019023284A2 (en) | 2017-05-12 | 2018-05-11 | concentrated aqueous solutions of aluminum hydrochloride monohydrate |
CA3062428A CA3062428A1 (en) | 2017-05-12 | 2018-05-11 | Concentrated aqueous solutions of aluminum chlorohydrate monohydrate |
EP18731244.2A EP3621921A1 (en) | 2017-05-12 | 2018-05-11 | Concentrated aqueous solutions of aluminum chlorohydrate monohydrate |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201762505724P | 2017-05-12 | 2017-05-12 | |
US62/505,724 | 2017-05-12 | ||
US201762550303P | 2017-08-25 | 2017-08-25 | |
US62/550,303 | 2017-08-25 |
Publications (1)
Publication Number | Publication Date |
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WO2018209204A1 true WO2018209204A1 (en) | 2018-11-15 |
Family
ID=62599685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2018/032276 WO2018209204A1 (en) | 2017-05-12 | 2018-05-11 | Concentrated aqueous solutions of aluminum chlorohydrate monohydrate |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3621921A1 (en) |
BR (1) | BR112019023284A2 (en) |
CA (1) | CA3062428A1 (en) |
MX (1) | MX2019013369A (en) |
WO (1) | WO2018209204A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1568831A (en) * | 1976-01-14 | 1980-06-04 | Unilever Ltd | Inhibition of perspiration |
WO2007082122A2 (en) * | 2006-01-06 | 2007-07-19 | Nextchem, Llc | Polyaluminum chloride and aluminum chlorohydrate, processes and compositions: high-basicity and ultra high-basicity products |
US20160074873A1 (en) | 2014-09-12 | 2016-03-17 | Usalco Llc | Method for production of aluminum chloride derivatives |
-
2018
- 2018-05-11 WO PCT/US2018/032276 patent/WO2018209204A1/en active Application Filing
- 2018-05-11 BR BR112019023284A patent/BR112019023284A2/en active Search and Examination
- 2018-05-11 MX MX2019013369A patent/MX2019013369A/en unknown
- 2018-05-11 EP EP18731244.2A patent/EP3621921A1/en active Pending
- 2018-05-11 CA CA3062428A patent/CA3062428A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1568831A (en) * | 1976-01-14 | 1980-06-04 | Unilever Ltd | Inhibition of perspiration |
WO2007082122A2 (en) * | 2006-01-06 | 2007-07-19 | Nextchem, Llc | Polyaluminum chloride and aluminum chlorohydrate, processes and compositions: high-basicity and ultra high-basicity products |
US20160074873A1 (en) | 2014-09-12 | 2016-03-17 | Usalco Llc | Method for production of aluminum chloride derivatives |
Also Published As
Publication number | Publication date |
---|---|
EP3621921A1 (en) | 2020-03-18 |
BR112019023284A2 (en) | 2020-05-19 |
MX2019013369A (en) | 2020-01-13 |
CA3062428A1 (en) | 2018-11-15 |
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