CN117181029A - Method for dissolving non-amphoteric hydroxide by alkali dissolution - Google Patents
Method for dissolving non-amphoteric hydroxide by alkali dissolution Download PDFInfo
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- CN117181029A CN117181029A CN202311222997.0A CN202311222997A CN117181029A CN 117181029 A CN117181029 A CN 117181029A CN 202311222997 A CN202311222997 A CN 202311222997A CN 117181029 A CN117181029 A CN 117181029A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003513 alkali Substances 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 title claims abstract description 29
- 238000004090 dissolution Methods 0.000 title abstract description 21
- 229910000000 metal hydroxide Inorganic materials 0.000 claims abstract description 45
- 150000004692 metal hydroxides Chemical class 0.000 claims abstract description 45
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 40
- 239000002253 acid Substances 0.000 claims abstract description 36
- 150000007942 carboxylates Chemical class 0.000 claims abstract description 4
- 150000001735 carboxylic acids Chemical class 0.000 claims abstract description 4
- 239000000126 substance Substances 0.000 claims description 48
- 239000000243 solution Substances 0.000 claims description 37
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 23
- 239000002585 base Substances 0.000 claims description 14
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 12
- 239000012266 salt solution Substances 0.000 claims description 12
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 239000000176 sodium gluconate Substances 0.000 claims description 10
- 235000012207 sodium gluconate Nutrition 0.000 claims description 10
- 229940005574 sodium gluconate Drugs 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- RGHNJXZEOKUKBD-SQOUGZDYSA-M D-gluconate Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O RGHNJXZEOKUKBD-SQOUGZDYSA-M 0.000 claims description 4
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims description 4
- AEMOLEFTQBMNLQ-AQKNRBDQSA-N D-glucopyranuronic acid Chemical compound OC1O[C@H](C(O)=O)[C@@H](O)[C@H](O)[C@H]1O AEMOLEFTQBMNLQ-AQKNRBDQSA-N 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 4
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 4
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 4
- 229910001453 nickel ion Inorganic materials 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- HLCFGWHYROZGBI-JJKGCWMISA-M Potassium gluconate Chemical compound [K+].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O HLCFGWHYROZGBI-JJKGCWMISA-M 0.000 claims description 3
- 229940050410 gluconate Drugs 0.000 claims description 3
- 239000004224 potassium gluconate Substances 0.000 claims description 3
- 235000013926 potassium gluconate Nutrition 0.000 claims description 3
- 229960003189 potassium gluconate Drugs 0.000 claims description 3
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 claims description 2
- IAJILQKETJEXLJ-UHFFFAOYSA-N Galacturonsaeure Natural products O=CC(O)C(O)C(O)C(O)C(O)=O IAJILQKETJEXLJ-UHFFFAOYSA-N 0.000 claims description 2
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 claims description 2
- 239000000174 gluconic acid Substances 0.000 claims description 2
- 235000012208 gluconic acid Nutrition 0.000 claims description 2
- 229940097042 glucuronate Drugs 0.000 claims description 2
- 229940097043 glucuronic acid Drugs 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- -1 hydrogen ions Chemical class 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- 238000003916 acid precipitation Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000007864 aqueous solution Substances 0.000 description 16
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 11
- 239000000347 magnesium hydroxide Substances 0.000 description 11
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 11
- 238000001556 precipitation Methods 0.000 description 8
- IPJKJLXEVHOKSE-UHFFFAOYSA-L manganese dihydroxide Chemical compound [OH-].[OH-].[Mn+2] IPJKJLXEVHOKSE-UHFFFAOYSA-L 0.000 description 5
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 239000008139 complexing agent Substances 0.000 description 3
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 3
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 3
- 229910021380 Manganese Chloride Inorganic materials 0.000 description 2
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 description 2
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229960002089 ferrous chloride Drugs 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 239000011565 manganese chloride Substances 0.000 description 2
- 235000002867 manganese chloride Nutrition 0.000 description 2
- 229940099607 manganese chloride Drugs 0.000 description 2
- 229910001437 manganese ion Inorganic materials 0.000 description 2
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229960004887 ferric hydroxide Drugs 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000001226 reprecipitation Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a method for dissolving non-amphoteric hydroxide by alkali. The method comprises the following steps: adding polyhydroxy carboxylic acid or polyhydroxy carboxylate and alkali into metal hydroxide, dissolving the metal hydroxide to obtain a solution containing metal ions, and then adding acid into the solution containing metal ions to obtain the metal hydroxide. The method provided by the invention realizes reversibility of alkali dissolution and acid precipitation of the non-amphoteric hydroxide under alkaline conditions, and has the advantages of simple operation, low-cost and environment-friendly raw materials.
Description
Technical Field
The invention relates to a method for dissolving non-amphoteric hydroxide by alkali, belonging to the technical field of chemical process.
Background
Many metal hydroxides are insoluble in aqueous solutions, such as magnesium hydroxide, ferrous hydroxide, nickel hydroxide, etc., and when an acid is added to the solution, the hydroxide is dissolved as a metal salt solution, and at this time, an alkali is added to the solution, and the metal hydroxide can precipitate and return to its original structure and composition. However, when the base is excessively added, it cannot be dissolved except for the amphoteric hydroxide. At present, a strong complexing agent can be added to dissolve metal hydroxide under an alkaline condition, but when acid is added to the solution again, hydroxide cannot be continuously generated, and reversible operation of dissolution and precipitation of hydroxide cannot be realized. Furthermore, even if the above-described operation can be achieved, the reagent consumption amount may be very large.
Disclosure of Invention
The invention aims to provide a method for dissolving non-amphoteric hydroxide by alkali so as to overcome the defects in the prior art.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the invention provides a method for dissolving non-amphoteric hydroxide by alkali, which comprises the following steps:
mixing polyhydroxy carboxylic acid and/or polyhydroxy carboxylate and alkali with metal hydroxide, so that the metal hydroxide is dissolved, and a solution containing metal ions is obtained, wherein the metal hydroxide is non-amphoteric hydroxide;
mixing the solution containing metal ions with an acid to obtain the metal hydroxide.
Compared with the prior art, the invention has the beneficial effects that:
1) The method for dissolving the non-amphoteric hydroxide by alkali provided by the invention realizes reversibility of alkali dissolution and acid precipitation of the non-amphoteric hydroxide under alkaline conditions.
2) The method for dissolving the non-amphoteric hydroxide by using the alkali has the advantages of low cost, small reagent consumption, low price and environmental protection of raw material sodium gluconate and simple operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic representation of the complete dissolution of magnesium hydroxide in example 1.
Detailed Description
In view of the defects of the prior art, the inventor of the present invention has provided a technical scheme of the present invention through long-term research and a large number of practices, which mainly obtains a solution of a corresponding metal element under an alkaline condition, realizes the dissolution of a metal hydroxide, and precipitates the hydroxide from a dissolution state again when an acid is added, and the solution of the reversible process not only can provide a theoretical basis for the dissolution of the hydroxide under the alkaline condition, but also can become a novel technical means for the separation and preparation of the metal hydroxide and other compounds in the future, and can provide a novel idea and method for the separation and preparation of the compounds in the future.
The technical scheme of the present invention, which is mainly a method for dissolving the non-amphoteric hydroxide by alkali dissolution, will be clearly and completely described below.
One aspect of the embodiments of the present invention provides a method for dissolving a non-amphoteric hydroxide with an alkali, comprising:
mixing a polyhydroxycarboxylic acid and/or polyhydroxycarboxylate and a base with a metal hydroxide, dissolving the metal hydroxide to form a solution comprising metal ions, the metal hydroxide being a non-amphoteric hydroxide;
mixing the solution containing metal ions with an acid to obtain the metal hydroxide.
In some embodiments, the method specifically includes:
adding a polyhydroxycarboxylic acid and/or polyhydroxycarboxylate and a base to a metal hydroxide, and dissolving the metal hydroxide to obtain a solution containing metal ions;
adding acid into the solution containing metal ions, and separating out to obtain metal hydroxide.
In some embodiments, the polyhydroxycarboxylic acids include, but are not limited to, at least one of gluconic acid, glucuronic acid, and the polyhydroxycarboxylates include, but are not limited to, at least one of gluconate, glucuronate.
Further, the gluconate salt includes, but is not limited to, sodium gluconate and/or potassium gluconate.
Further, the base includes, but is not limited to, any one or a combination of two of sodium hydroxide and potassium hydroxide.
In some more specific embodiments, the metal ions in the metal hydroxide include, but are not limited to, at least one of magnesium ions, ferrous ions, manganous ions, nickel ions, and the like.
In some embodiments, the method specifically includes:
adding polyhydroxy carboxylic acid and/or polyhydroxy carboxylate into the metal salt solution, adding alkali, standing to dissolve the generated metal hydroxide, and obtaining the solution containing metal ions.
Further, the amount of the substance of the polyhydroxycarboxylic acid and/or polyhydroxycarboxylate is not less than the amount of the substance of the metal ion contained in the metal salt solution.
Still further, the ratio of the amount of the polyhydroxycarboxylic acid and/or polyhydroxycarboxylate to the amount of the metal ion-containing substance in the metal salt solution is 1:1 to 3:1.
Further, the method specifically comprises the following steps: adding a polyhydroxycarboxylate to the metal salt solution, and making the total amount of added substances of the alkali larger than (a+1) x n, wherein a is the charge number of the metal ions and n is the amount of the substances of the metal ions, and then standing to obtain the solution containing the metal ions.
Further, the method specifically comprises the following steps: adding a polyhydroxycarboxylic acid to the metal salt solution, and allowing the total amount of added substances of the base to be larger than (a+1) ×n+b, wherein a is the charge number of metal ions, n is the amount of substances of metal ions, and b is the amount of substances of the polyhydroxycarboxylic acid, followed by standing to obtain the metal ion-containing solution.
Illustratively, the method includes: adding sodium gluconate in a certain amount of substances into a metal salt solution, then adding alkali into the metal salt solution, when the metal element just becomes hydroxide completely, dissolving the hydroxide can happen by continuing adding alkali, and when the amount of the substances added with sodium gluconate is not less than the amount of the substances of metal ions and the amount of the added alkali exceeds the amount of the substances of the metal element continuously, namely, the total amount of the substances of the alkali is more than (a+1) x n (a is the charge number of the metal ions and n is the amount of the substances of the metal ions), standing under certain conditions (such as standing for a certain time at a certain temperature), and then completely dissolving the metal hydroxide can happen. However, when acid is added to the dissolved metal element solution, the metal hydroxide precipitates again, so that the reversible process of dissolution-precipitation of the metal hydroxide under alkaline conditions is realized.
In some embodiments, the method specifically includes: mixing the metal hydroxide with water to form a metal hydroxide suspension, adding polyhydroxycarboxylic acid and/or polyhydroxycarboxylate and alkali, and standing to dissolve the metal hydroxide to obtain a solution containing metal ions.
Further, the amount of the substance of the polyhydroxycarboxylic acid and/or polyhydroxycarboxylate is not less than the amount of the substance of the metal element in the metal hydroxide.
Further, the method specifically comprises the following steps: adding a polyhydroxycarboxylic acid to the metal hydroxide suspension, and allowing the total amount of added substances of the base to be greater than or equal to (n+b), wherein n is the amount of a substance of a metal ion, and b is the amount of a substance of the polyhydroxycarboxylic acid, followed by standing to obtain the metal ion-containing solution.
Further, the method specifically comprises the following steps: adding a polyhydroxycarboxylate to the metal hydroxide suspension, and allowing the amount of the added substance of the base to be greater than or equal to the amount of the substance of the metal element in the metal hydroxide, followed by standing to obtain the metal ion-containing solution.
Further, the standing temperature is 20-80 ℃ and the time is 1-6 h.
In some embodiments, the acid comprises any one or a combination of two or more of hydrochloric acid, sulfuric acid.
Further, the ratio of the total mass of hydrogen ions in the acid to the mass of the base is greater than or equal to 1:1.
Illustratively, the method specifically comprises: preparing metal hydroxide into suspension by using water, adding sodium gluconate with the amount of substances being greater than or equal to that of metal element substances, adding alkali with the amount being greater than or equal to that of the metal element substances into the suspension, and standing for a certain time at a certain temperature to dissolve the metal element. When acid is added to the solution, the dissolved hydroxide precipitates again as hydroxide.
The acid adding and re-precipitation are reversible dissolution, and most complexing agents can be dissolved, but the acid adding can not be changed into hydroxide precipitation after the complexing agents are added, so the novel hydroxide synthesis method is also provided.
The technical solution of the present invention will be described in further detail below with reference to a number of preferred embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. It should be noted that the examples described below are intended to facilitate the understanding of the present invention and are not intended to limit the present invention in any way. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The experimental methods, in which specific conditions are not noted in the following examples, are generally conducted under conventional conditions or under conditions recommended by the manufacturer.
Example 1
Alkaline dissolution and precipitation of magnesium chloride
Magnesium chloride is prepared into an aqueous solution with the concentration of 0.1mol/L, then sodium gluconate with the concentration of 1-3 times that of magnesium ion substances is added into the aqueous solution, then sodium hydroxide is added dropwise into the aqueous solution, and magnesium hydroxide can be precipitated, when the amount of the substances added with sodium hydroxide is 3 times that of the magnesium ion substances, the magnesium hydroxide can be completely dissolved after heating at 60 ℃ for 2 hours, as shown in figure 1 after dissolution, and then the magnesium hydroxide can be precipitated from the aqueous solution when hydrochloric acid is added.
Example 2
Alkaline dissolution and precipitation of ferrous chloride
The ferrous chloride is prepared into an aqueous solution with the concentration of 0.1mol/L, then sodium gluconate with the concentration of 1-3 times that of the ferric ion substances is added into the aqueous solution, then sodium hydroxide is added into the aqueous solution in a dropwise manner, so that ferrous hydroxide can be separated out, when the amount of the substances added with the sodium hydroxide is 3 times that of the ferrous ion substances, the aqueous solution is heated at 80 ℃ for 4 hours, the ferrous hydroxide can be completely dissolved, and then hydrochloric acid is added again, so that the aqueous solution can separate out the ferric hydroxide. Because ferrous ions are easily oxidized by air, the oxidation is carried out under the protection of inert gas.
Example 3
Alkaline dissolution and precipitation of magnesium hydroxide
2.03g of magnesium hydroxide was added to 20mL of secondary water to prepare a suspension, sodium gluconate was added to the suspension in the same amount as the magnesium hydroxide substance, then an alkali solution was added dropwise to the solution, a small amount of hydroxide was found to precipitate, and after the amount of alkali continuously added was the same as the amount of magnesium hydroxide, the solution was heated at 60℃for 2 hours, complete dissolution of magnesium hydroxide was caused, and the case after dissolution was the same as in example 1. When hydrochloric acid is added thereto, magnesium hydroxide can be re-precipitated from the solution.
Example 4
Alkaline dissolution and precipitation of manganese chloride
Manganese chloride is prepared into an aqueous solution of 0.1mol/L, then sodium gluconate with the amount which is 1 to 3 times that of manganese ion substances is added into the aqueous solution, then potassium hydroxide is added into the aqueous solution in a dropwise manner, manganese hydroxide can be separated out, when the amount of the substances added with potassium hydroxide is 3 times that of the manganese ion substances, the aqueous solution is heated at 20 ℃ for 6 hours, complete dissolution of the manganese hydroxide can occur, and then when sulfuric acid is added, the aqueous solution can separate out the manganese hydroxide. Because manganese hydroxide is easily oxidized by air, the manganese hydroxide is required to be performed under the protection of inert gas.
Example 5
Alkaline dissolution and precipitation of nickel chloride
Nickel chloride was prepared as an aqueous solution of 0.2mol/L, then potassium gluconate was added thereto in an amount of 1 to 3 times the amount of the nickel ion species, and then sodium hydroxide was added dropwise to the solution, whereby it was found that nickel hydroxide was precipitated, and when the amount of the sodium hydroxide added was 3 times the amount of the nickel ion species, complete dissolution of nickel hydroxide occurred by heating at 80℃for 1 hour, and then when sulfuric acid was added, nickel hydroxide was precipitated from the solution.
In addition, the inventors have conducted experiments with other materials, process operations, and process conditions as described in this specification with reference to the foregoing examples, and have all obtained desirable results.
It should be understood that the technical solution of the present invention is not limited to the above specific embodiments, and all technical modifications made according to the technical solution of the present invention without departing from the spirit of the present invention and the scope of the claims are within the scope of the present invention.
Claims (10)
1. A method for dissolving a non-amphoteric hydroxide with an alkali, comprising:
mixing a polyhydroxycarboxylic acid and/or polyhydroxycarboxylate and a base with a metal hydroxide, dissolving the metal hydroxide to form a solution comprising metal ions, the metal hydroxide being a non-amphoteric hydroxide;
mixing the solution containing metal ions with an acid to obtain the metal hydroxide.
2. The method according to claim 1, characterized in that: the polyhydroxycarboxylic acid comprises at least one of gluconic acid and glucuronic acid, and the polyhydroxycarboxylate comprises at least one of gluconate and glucuronate.
3. The method according to claim 2, characterized in that: the gluconate includes sodium gluconate and/or potassium gluconate.
4. The method according to claim 1, characterized in that: the alkali comprises any one or the combination of sodium hydroxide and potassium hydroxide.
5. The method according to claim 1, characterized in that: the metal ions in the metal hydroxide comprise at least one of magnesium ions, ferrous ions, manganous ions and nickel ions.
6. The method according to claim 1, characterized in that it comprises in particular: adding polyhydroxy carboxylic acid and/or polyhydroxy carboxylate into the metal salt solution, adding alkali, standing to dissolve the generated metal hydroxide, and obtaining the solution containing metal ions.
7. The method according to claim 6, wherein: the ratio of the amount of the polyhydroxycarboxylic acid and/or polyhydroxycarboxylate substance to the amount of the metal ion-containing substance in the metal salt solution is 1:1 to 3:1;
and/or, the method specifically comprises the following steps: adding a polyhydroxycarboxylate to the metal salt solution, and allowing the total amount of added substances of the base to be larger than (a+1) x n, wherein a is the charge number of metal ions and n is the amount of substances of metal ions, followed by standing to obtain the solution containing metal ions;
and/or, the method specifically comprises the following steps: adding a polyhydroxycarboxylic acid to the metal salt solution, and allowing the total amount of added substances of the base to be larger than (a+1) ×n+b, wherein a is the charge number of metal ions, n is the amount of substances of metal ions, and b is the amount of substances of the polyhydroxycarboxylic acid, followed by standing to obtain the metal ion-containing solution.
8. The method according to claim 1, characterized in that it comprises in particular: mixing the metal hydroxide with water to form a metal hydroxide suspension, adding polyhydroxycarboxylic acid and/or polyhydroxycarboxylate and alkali, and standing to dissolve the metal hydroxide to obtain a solution containing metal ions.
9. The method according to claim 8, wherein: the amount of the substance of the polyhydroxycarboxylic acid and/or polyhydroxycarboxylate is not less than the amount of the substance of the metal element in the metal hydroxide;
and/or, the method specifically comprises the following steps: adding a polyhydroxycarboxylic acid to the metal hydroxide suspension and making the total amount of added substances of the base greater than or equal to (n+b), wherein n is the amount of the substance of the metal ion, and b is the amount of the substance of the polyhydroxycarboxylic acid, followed by standing to obtain the solution containing the metal ion;
and/or, the method specifically comprises the following steps: adding a polyhydroxycarboxylate to the metal hydroxide suspension, and allowing the amount of the added substance of the base to be greater than or equal to the amount of the substance of the metal element in the metal hydroxide, followed by standing to obtain the metal ion-containing solution;
and/or the standing temperature is 20-80 ℃ and the time is 1-6 h.
10. The method according to claim 1, characterized in that: the acid comprises any one or more than two of hydrochloric acid and sulfuric acid;
and/or the ratio of the total mass of hydrogen ions in the acid to the mass of the base is greater than or equal to 1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311222997.0A CN117181029A (en) | 2023-09-21 | 2023-09-21 | Method for dissolving non-amphoteric hydroxide by alkali dissolution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311222997.0A CN117181029A (en) | 2023-09-21 | 2023-09-21 | Method for dissolving non-amphoteric hydroxide by alkali dissolution |
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| CN117181029A true CN117181029A (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311222997.0A Pending CN117181029A (en) | 2023-09-21 | 2023-09-21 | Method for dissolving non-amphoteric hydroxide by alkali dissolution |
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| Country | Link |
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