WO2022032726A1 - Procédé de séparation de mousse pour solution colloïdale d'hydroxyde de magnésium - Google Patents

Procédé de séparation de mousse pour solution colloïdale d'hydroxyde de magnésium Download PDF

Info

Publication number
WO2022032726A1
WO2022032726A1 PCT/CN2020/111355 CN2020111355W WO2022032726A1 WO 2022032726 A1 WO2022032726 A1 WO 2022032726A1 CN 2020111355 W CN2020111355 W CN 2020111355W WO 2022032726 A1 WO2022032726 A1 WO 2022032726A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnesium hydroxide
modifier
colloidal solution
acid
magnesium
Prior art date
Application number
PCT/CN2020/111355
Other languages
English (en)
Chinese (zh)
Inventor
王丽
张烨
孙伟
徐芮
胡岳华
高建德
Original Assignee
中南大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中南大学 filed Critical 中南大学
Publication of WO2022032726A1 publication Critical patent/WO2022032726A1/fr

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
    • C01F5/00—Compounds of magnesium
    • C01F5/14—Magnesium hydroxide
    • 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 invention relates to a method for recycling magnesium hydroxide resources, in particular to a method for separating foams of magnesium hydroxide colloidal solution, belonging to the technical field of comprehensive utilization of magnesium resources.
  • Magnesium is one of the most abundant light metal elements on earth. Magnesium is abundant in abundance, with an abundance of 2% in the earth's crust. Magnesium is an important material for the aviation industry. Magnesium alloys are good lightweight structural materials and are widely used in industrial sectors such as space technology, aviation, automobiles and instrumentation. Magnesium is also used to manufacture photographic and optical instruments. As a strong reducing agent, Magnesium can also be used in the production of titanium, zirconium, beryllium, uranium and hafnium; magnesium fertilizer can promote the absorption and utilization of phosphorus by plants, and the growth of magnesium-deficient plants tends to stagnate. Magnesium is a basic material that occupies an important position in people's lives.
  • magnesium ore resources are mainly magnesite and dolomite.
  • my country has proven magnesite reserves of 3.4 billion tons and dolomite reserves of more than 4 billion tons.
  • the four salt lake areas in my country are rich in magnesium salt resources.
  • 33 brine lakes, semi-dry salt lakes and dry salt lakes in the Qaidam Basin have reserves of 6.003 billion tons of magnesium salt resources.
  • the reserves amount to 6.003 billion tons, of which the magnesium salt reserves in the Qaidam Basin account for 99% of the total amount of magnesium salts identified in the country, ranking first in the country, and it is an important source of magnesium salt production.
  • magnesium hydroxide In recent years, scholars at home and abroad have carried out a lot of research on the development and utilization of magnesium resources in solution. At present, the research on solution magnesium resources mostly focuses on the production of various magnesium salt products, including magnesium sulfate, magnesium hydroxide, magnesium oxide, magnesium carbonate, magnesium oxalate and hydrotalcite materials. Among them, the production process of traditional magnesium hydroxide products mostly adopts the sodium hydroxide precipitation method to directly precipitate magnesium ions. Although the process is simple, the particle size of the precipitated magnesium hydroxide is extremely fine (the particle size is generally below 100nm), and there is hydration It is easy to form magnesium hydroxide hydrate, so that it can be stably and uniformly dispersed in the solution to form a magnesium hydroxide colloidal solution.
  • the colloidal solution is different from other conventional solid slurry systems, and the magnesium hydroxide has poor sedimentation or filtration performance.
  • the magnesium hydroxide colloidal solution it is urgent to develop a process flow with simple process and little environmental pollution, so as to realize the high-efficiency solid-liquid separation of the magnesium hydroxide colloidal solution, and then realize the comprehensive recovery and utilization of magnesium resources.
  • the object of the present invention is to provide A method for foam separation of magnesium hydroxide colloidal solution.
  • the present invention provides a method for foam separation of magnesium hydroxide colloidal solution, which is characterized by comprising the following steps.
  • Step 1) Add a modifier to the magnesium hydroxide colloidal solution and mix to obtain a mixed solution; the modifier is an amine modifier of formula 1, a sulfonic acid modifier of formula 2, and a At least one of the sulfuric acid-based modifier of structural formula 3 and the carboxylic acid-based modifier of structural formula 4.
  • R 1 to R 4 are independently C 10 to C 30 saturated hydrocarbon groups or hydrocarbon groups with 1 to 3 unsaturated bonds, or six-membered ring hydrocarbon groups.
  • the M is H, Na, K or NH 4 + .
  • the A is -OH, -ONa, -OK, -ONH 4 + , -NOH or -OR; the R is a C 1 -C 6 alkyl group.
  • Step 2) Add a foaming agent to the mixed solution and fill with gas to conduct gas-solid-liquid three-phase treatment.
  • Step 3 The aerated mixed solution is allowed to stand and layer to obtain an upper layer of magnesium hydroxide and a water layer.
  • the particle size of magnesium hydroxide formed by the precipitation method is extremely fine (below 100nm), and because of its hydroxide characteristics and nanoscale size characteristics, it is easy to form hydration, and it is easy to form a stable magnesium hydroxide colloidal solution; it is difficult to pass natural Sedimentation or filtration methods achieve separation of colloidal particles from aqueous solutions.
  • the method of the present invention realizes the hydrogenation by adding the modifier and the foaming agent of the stated content to the magnesium hydroxide colloid solution, inflating after mixing, and standing for stratification. Efficient separation of magnesium oxide and water.
  • the magnesium hydroxide colloid can destroy the hydrated structure of magnesium hydroxide, and modify the surface of magnesium hydroxide to increase its surface Hydrophobicity, form hydrophobic aggregates, and make magnesium hydroxide aggregate to the upper layer, so as to separate from the water phase, and effectively realize the high-efficiency solid-liquid separation of magnesium hydroxide colloid and the recovery of precipitation.
  • the invention benefits from the chemical and physical synergy of the agent and the gas, and can separate and recover the magnesium hydroxide in the colloidal solution, thereby realizing the efficient recovery of the magnesium ions in the solution and overcoming the magnesium hydroxide in the traditional precipitation process.
  • the technical problems of colloid filtration and recovery are difficult, and the process is simplified, the process time is shortened, and the adverse impact on the environment is reduced.
  • the technical scheme of the present invention is to add an appropriate amount of modifier and foaming agent to the colloidal solution of magnesium hydroxide, stir and adjust slurry and aerate, and utilize the interaction between magnesium hydroxide, modifier and air bubbles to inhibit hydration and form hydrophobicity. Aggregates to achieve high-efficiency solid-liquid separation of magnesium hydroxide colloids.
  • the technical scheme of the present invention innovatively utilizes the modifier for the modification of magnesium hydroxide and its hydrate, thereby solving the problem of selective separation of magnesium hydroxide and water in the magnesium hydroxide colloid.
  • the technical scheme of the invention simplifies the process, shortens the process time, reduces the adverse impact on the environment, and overcomes the problems of poor natural sedimentation performance and filtration performance of magnesium hydroxide colloid produced by the traditional precipitation method.
  • the magnesium hydroxide colloidal solution may be a colloidal solution formed by any existing means.
  • the magnesium hydroxide colloidal solution is obtained by a traditional precipitation method, and the alkali metal hydroxide is added to a solution containing magnesium ions such as salt lake brine and salicylic salt solution.
  • the added amount of the alkali metal hydroxide is 1 to 1.2 times the theoretical molar amount of the alkali metal hydroxide required to convert all the magnesium ions in the magnesium ion-containing solution into magnesium hydroxide.
  • Alkali metal hydroxides are common strong bases in the art, such as sodium hydroxide, potassium hydroxide and the like.
  • the particle size of the magnesium hydroxide is below 100 nm, preferably 30 nm-100 nm.
  • the content of magnesium hydroxide is not required, and the method of the present invention can be used to achieve efficient and high-selective separation when a stable colloidal solution is formed.
  • the magnesium hydroxide concentration in the magnesium hydroxide colloidal solution is not higher than 80 g/L.
  • the pH of the magnesium hydroxide colloid solution is controlled to be 8-11.50; preferably 9-11.50; more preferably 9-10.
  • controlling under the preferred pH conditions can help to further improve the gas-solid-liquid three-phase interaction between the modifier, magnesium hydroxide particles and bubbles, and help to further improve the treatment effect, and Reduce disposal costs and avoid environmental pressures.
  • the present invention innovatively utilizes the modifier to modify the colloid formed by magnesium hydroxide hydrate, and combines the gas-solid-liquid three-phase action to achieve high-selectivity separation of magnesium hydroxide and water.
  • the research of the present invention also found that controlling the type of the modifier can help to further improve the effect, help to further improve the separation selectivity of magnesium hydroxide and water in the hydroxide colloid, and improve the recovery of magnesium hydroxide. Not only that, but also can significantly improve the processing efficiency.
  • the R 1 to R 4 can be saturated hydrocarbon groups of C 10 to C 30 , preferably, the saturated alkyl groups are straight-chain saturated alkyl groups.
  • the R 1 ⁇ R 4 can be decyl, n-undecyl, n-dodecyl, n-tridecyl, n-tetradecyl, n-pentadecyl, n-hexadecyl , n-heptadecyl, n-octadecyl, n-nonadecyl, n-eicosyl, n-hecosyl, n-docosyl, n-docosyl, n-docosyl alkyl, n-pentacosyl, n-hexadecyl, n-heptacosyl, n-octacosyl, n-nonacosyl or n-triacon
  • R 1 to R 4 may also be hydrocarbon groups with double bonds, preferably straight-chain hydrocarbon groups with double bonds.
  • the double bond is formed by any adjacent carbon in the 2nd to 30th positions.
  • the number of the double bonds is 1 to 3. When the number of double bonds is 2 or 3, the double bonds preferably do not share carbon atoms.
  • R 1 to R 4 may also be a six-membered ring hydrocarbon group, and the six-membered ring hydrocarbon group may be a saturated ring hydrocarbon group or a partially unsaturated ring hydrocarbon group.
  • the sulfonic acid modifier includes at least one of sodium petroleum sulfonate, sodium dodecyl sulfonate, sodium octadecyl sulfonate, and sodium hexadecyl sulfonate.
  • the sulfuric acid modifier is at least one of sodium lauryl sulfate, sodium hexadecyl sulfate, and sodium octadecyl sulfate.
  • the carboxylic acid modifiers include oleic acid, linoleic acid, linolenic acid, lauric acid, myristic acid, capric acid, palmitic acid, stearic acid, naphthenic acid, hydroxamic acid, oxidized paraffin soap , at least one of tall oil, tall oil soap and sodium oleate.
  • the research found that the preferred carboxylic acid modifier can obtain good separation effect at a lower dosage.
  • the amine modifier includes at least one of dodecylamine, tetradecylamine, hexadecylamine, octadecylamine and dodecylamine.
  • the research of the present invention unexpectedly found that the use of the amine modifier unexpectedly has a better effect, and a good separation effect of magnesium hydroxide and water in the colloid can be obtained under the premise of lower dosage.
  • the different types of modifiers can be used alone or in combination.
  • the further control of the dosage is helpful to further exert the synergistic effect between the modifier, the magnesium hydroxide particles and the gas, which is helpful to further improve the Dehydration rate of magnesium hydroxide colloid.
  • the amount of the carboxylic acid modifier is not less than (not less than or equal to in the present invention) 30g/t, preferably 30 ⁇ 200 g/t; more preferably 30 ⁇ 100 g/t.
  • the amount of the amine modifier is preferably not less than 5g/t, preferably 5 ⁇ 50g/t; more preferably 5 ⁇ 30g /t; more preferably 10 to 20 g/t.
  • the consumption of the sulfonic acid modifier or the sulfuric acid modifier is not less than 50 g/t, preferably 50 to 350 g/t; Preferably 200 ⁇ 300 g/t.
  • the present invention also finds that the use of the compound modifier can further improve the dehydration rate of magnesium hydroxide colloid, the recovery rate, purity and colloid dehydration rate of magnesium hydroxide based on the synergistic effect between the modifiers.
  • the modifier includes an amine modifier, and optionally includes at least one of a sulfonic acid modifier, a sulfuric acid modifier, and a carboxylic acid modifier.
  • step (1) of the present invention an existing method can be used to mix the modifier and the colloidal solution, such as mechanical stirring.
  • the mixing time is not particularly required, and in consideration of processing effect and process efficiency, the mixing time is preferably 3 to 5 min.
  • the foaming agent is at least one of terpineol oil, industrial No. 2 oil and MIBC. Based on the weight of the magnesium hydroxide colloidal solution, the consumption of the foaming agent is 5-10 g/t.
  • gas is blown into the mixed system, and based on the gas-solid-liquid three-phase interaction of the modifier, magnesium hydroxide particles and bubbles, the inhibition and decomposition of magnesium hydroxide hydrate can be effectively achieved, Forming hydrophobic aggregates and avoiding further hydration into colloids can effectively achieve separation of magnesium hydroxide and water in colloids.
  • the type of gas to be charged is not required, for example, air, nitrogen, inert gas, etc. are all acceptable, preferably air.
  • the time of filling gas is not less than 0.5min; preferably 3min and above; further preferably 3 ⁇ 10min.
  • the technical scheme of the present invention based on the effect of the modifier on magnesium hydroxide hydrate, can inhibit hydration and avoid desorption, and in combination with the joint control of the aeration time, it is not necessary to adjust the aeration process during the aeration process.
  • the solids on the surface are continuously recovered, and a good separation effect of magnesium hydroxide and water can be obtained after only one gassing and one standing.
  • the standing time is not less than 5min, preferably 5-120min.
  • the dehydration rate of the magnesium hydroxide colloidal solution is over 75%, and the moisture content of the upper layer of magnesium hydroxide is about 80-90%.
  • the existing means can be used to separate the upper layer after standing for stratification to obtain the upper layer of magnesium hydroxide.
  • the present invention also provides a medicament for dehydrating magnesium hydroxide colloidal solution to recover magnesium hydroxide, comprising the modifier described in any one of formula 1 to formula 4.
  • the medicament comprises an amine modifier of formula 1.
  • the amine modifier of formula 1 contains the amine modifier of formula 1, and also contains at least one of the sulfonic acid modifiers of formula 2, the sulfuric acid modifier of formula 3, and the carboxylic acid modifier of formula 4. A sort of.
  • the weight part of the amine modifier is 10-30 parts; the weight part of other modifiers is 0-300 parts.
  • the medicament comprises an amine modifier and a carboxylic acid modifier, wherein the weight portion of the amine modifier is 10 to 30 parts; the weight portion of the carboxylic acid modifier is 30 to 30 parts by weight. 90 servings.
  • the medicament includes an amine modifier and a sulfonic acid modifier, wherein the weight portion of the amine modifier is 10-30 parts; the weight portion of the sulfonic acid modifier is 200-300 parts .
  • the medicament includes an amine modifier, a sulfonic acid modifier, and a carboxylic acid modifier, wherein the weight part of the amine modifier is 10-30 parts; The weight part is 200-300 parts; the weight part of the carboxylic acid modifier is 30-90 parts.
  • the present invention discovers for the first time that the modifier modifies magnesium hydroxide hydrate, destroys the hydration structure and inhibits the formation of hydration, thereby enabling the selective separation of magnesium hydroxide and water in the colloid.
  • the present invention provides a brand-new idea for separating magnesium hydroxide from magnesium hydroxide colloid, that is, destroying the structure of magnesium hydroxide hydrate and making it hydrophobic to aggregate to the upper layer, and the water phase is located in the lower layer, so as to realize the separation of magnesium hydroxide in the magnesium hydroxide colloid. Selective separation of magnesium hydroxide and water.
  • the technical scheme of the present invention adopts the foam separation method to realize the high-efficiency solid-liquid separation and recovery of the magnesium hydroxide colloidal solution.
  • the modifier is used to improve the hydroxide
  • the surface of magnesium precipitation is hydrophobic, and under the action of modifier and air bubbles, magnesium hydroxide is precipitated to form hydrophobic aggregates, which are separated from the water phase to achieve high-efficiency solid-liquid separation and recovery of magnesium hydroxide colloid.
  • the foam separation method overcomes the traditional direct precipitation method to produce magnesium hydroxide. Problems such as poor sedimentation performance and filtration performance simplify the process, shorten the process time, have no pollution to the environment, and have broad application prospects.
  • the technical scheme of the present invention utilizes the synergistic effect of the modifier and the air bubbles to strengthen the hydrophobicity of the magnesium hydroxide precipitation, and the modifier, the air bubbles and the magnesium hydroxide precipitation form a hydrophobic aggregate to strengthen the separation of the magnesium hydroxide precipitation and the water phase, thereby realizing High-efficiency solid-liquid separation and recovery of magnesium hydroxide colloid, the purity of magnesium hydroxide obtained by directly drying the foam is more than 95%.
  • Fig. 1 is the process flow schematic diagram of the present invention.
  • FIG. 2 is a picture of the colloid separation of Example 1.
  • FIG. 3 is an uninflated picture of Comparative Example 1.
  • FIG. 4 is a picture of Comparative Example 2 without adding a modifier.
  • Figure 5 is a picture of Comparative Example 3 after inflation and standing.
  • the colloidal solution is formed by adding sodium hydroxide solution to the solution containing magnesium ions, and the amount of sodium hydroxide added is 1% of the theoretical molar amount required to convert all magnesium ions in the solution containing magnesium ions into magnesium hydroxide. ⁇ 1.2x.
  • the particle size is 30-100 nm, and the pH is 9.0-9.4.
  • the dosage of the medicament is based on the weight of the magnesium hydroxide colloidal solution.
  • magnesium hydroxide colloidal solution the concentration of magnesium hydroxide in the colloidal solution is 70g/L, add 300 g/t sodium petroleum sulfonate to the magnesium hydroxide colloidal solution, 15 g/t dodecylamine, 90 g/t sodium oleate, and stirring for 5 min to obtain a magnesium hydroxide mixed solution.
  • step (2) The aerated magnesium hydroxide mixed solution (step (2)) was allowed to stand for 60 min and then layered to obtain an upper layer of magnesium hydroxide and a water layer (lower layer) (as shown in Figure 2).
  • the magnesium hydroxide foam is dried to obtain a magnesium hydroxide product with a purity of 98% and a recovery rate of magnesium hydroxide of 98%.
  • magnesium hydroxide colloidal solution the concentration of magnesium hydroxide in the colloidal solution is 50g/L, add 200 g/t sodium petroleum sulfonate to the magnesium hydroxide colloidal solution, 20 g/t g/t dodecylamine, stirring and slurrying for 5 min to obtain a magnesium hydroxide mixed solution.
  • magnesium hydroxide foam is dried to obtain a magnesium hydroxide product with a purity of 99% and a recovery rate of magnesium hydroxide of 99%.
  • magnesium hydroxide colloidal solution the concentration of magnesium hydroxide in the colloidal solution is 20 g/L, add 15 g/t dodecylamine to the magnesium hydroxide colloidal solution, 200 g/t g/t sodium petroleum sulfonate, stirring and slurrying for 5 min to obtain a magnesium hydroxide mixed solution.
  • the aerated magnesium hydroxide mixture was left standing for 60 min and then layered to obtain an upper layer of magnesium hydroxide and a water layer, and the dehydration rate of magnesium hydroxide colloid was 80%.
  • the magnesium hydroxide foam is dried to obtain a magnesium hydroxide product with a purity of 99% and a magnesium hydroxide recovery rate of 97%.
  • Example 4 Compared with Example 4, the main difference is that different dosages of single modifiers are used, specifically.
  • magnesium hydroxide colloidal solution the concentration of magnesium hydroxide in the colloidal solution is 20 g/L, add 15 g/t dodecylamine to the magnesium hydroxide colloidal solution, and stir and adjust the slurry for 5 minutes to obtain magnesium hydroxide mixture.
  • magnesium hydroxide mixture was left standing for 60 min and then layered to obtain the upper layer and the water layer of magnesium hydroxide.
  • the dehydration rate of magnesium hydroxide colloid was 75%.
  • the magnesium hydroxide foam is dried to obtain a magnesium hydroxide product with a purity of 99% and a recovery rate of magnesium hydroxide of 98%.
  • Example 4 Compared with Example 4, the main difference is that different dosages of single modifiers are used, specifically.
  • Example 4 Compared with Example 4, the main difference is that different dosages of single modifiers are used, specifically.
  • magnesium hydroxide colloidal solution the concentration of magnesium hydroxide in the colloidal solution is 20 g/L, add 30 g/t sodium oleate to the magnesium hydroxide colloidal solution, stir and adjust the slurry for 5 minutes to obtain magnesium hydroxide mixture.
  • Example 4 Compared with Example 4, the main difference is that different dosages of single modifiers are used, specifically.
  • magnesium hydroxide colloidal solution the concentration of magnesium hydroxide in the colloidal solution is 20 g/L, add 30 g/t dodecylamine to the magnesium hydroxide colloidal solution, stir and adjust the slurry for 10 minutes to obtain magnesium hydroxide mixture.
  • Example 4 Compared with Example 4, the main difference is that different dosages of single modifiers are used, specifically.
  • magnesium hydroxide mixture was left standing for 70 minutes and then layered to obtain the upper layer and the water layer of magnesium hydroxide.
  • the dehydration rate of magnesium hydroxide colloid was 75%.
  • the magnesium hydroxide foam is dried to obtain a magnesium hydroxide product with a purity of 98% and a magnesium hydroxide recovery rate of 99%.
  • Example 4 Compared with Example 4, the main difference is that different dosages of single modifiers are used, specifically.
  • magnesium hydroxide colloidal solution the concentration of magnesium hydroxide in the colloidal solution is 20 g/L, add 50 g/t sodium oleate to the magnesium hydroxide colloidal solution, and stir and adjust the slurry for 10 minutes to obtain magnesium hydroxide mixture.
  • magnesium hydroxide mixture was left standing for 60 min and then layered to obtain the upper layer and the water layer of magnesium hydroxide.
  • the dehydration rate of magnesium hydroxide colloid was 75%.
  • the magnesium hydroxide foam is dried to obtain a magnesium hydroxide product with a purity of 99% and a magnesium hydroxide recovery rate of 97%.
  • Example 8 Compared with Example 8, the main difference is that two modifiers are used in combination, specifically.
  • magnesium hydroxide colloidal solution the concentration of magnesium hydroxide in the colloidal solution is 20g/L, add 15g/t dodecylamine to the magnesium hydroxide colloid solution, 15g/t Sodium oleate, stirring and slurrying for 10 minutes to obtain a magnesium hydroxide mixed solution.
  • magnesium hydroxide mixture was left for 50 minutes and then layered to obtain the upper layer and the water layer of magnesium hydroxide.
  • the dehydration rate of magnesium hydroxide colloid was 81%.
  • the magnesium hydroxide foam is dried to obtain a magnesium hydroxide product with a purity of 99% and a recovery rate of magnesium hydroxide of 98%.
  • Example 8 Compared with Example 8, the combined use of dodecylamine and sodium oleate can unexpectedly produce a synergistic effect, which helps to further improve the dehydration rate of the colloid.
  • Example 8 Compared with Example 8, the main difference is that two modifiers are used in combination, specifically.
  • magnesium hydroxide colloidal solution the concentration of magnesium hydroxide in the colloidal solution is 20 g/L, add 30 g/t dodecylamine to the magnesium hydroxide colloidal solution, 150 g/t g/t sodium petroleum sulfonate, stirring and slurrying for 10 min to obtain a magnesium hydroxide mixed solution.
  • Example 1 Compared with Example 1, the only difference is that no gas is introduced (gas-solid-liquid three-phase treatment is not performed), specifically.
  • magnesium hydroxide colloidal solution the concentration of magnesium hydroxide in the colloidal solution is 70g/L, add 300 g/t sodium petroleum sulfonate to the magnesium hydroxide colloidal solution, 15 g/t dodecylamine, 90 g/t sodium oleate, and stirring for 5 min to obtain a magnesium hydroxide mixed solution.
  • Example 1 Compared with Example 1, the only difference is that no modifier is added, specifically.
  • Example 1 Compared with Example 1, the only difference is that no modifier is added, specifically.

Landscapes

  • 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)
  • Colloid Chemistry (AREA)

Abstract

L'invention concerne un procédé de séparation de mousse pour une solution colloïdale d'hydroxyde de magnésium. Le procédé comprend : l'ajout d'une quantité appropriée d'un modificateur à une solution colloïdale d'hydroxyde de magnésium, et la réalisation d'une agitation et d'un conditionnement de la pulpe; l'ajout d'un agent moussant à la pulpe d'hydroxyde de magnésium et le remplissage avec un gaz, et le repos pendant plusieurs heures pour obtenir une couche supérieure et une couche d'eau clarifiée, la couche supérieure correspondant à l'hydroxyde de magnésium, et la mousse étant directement séchée pour obtenir un produit d'hydroxyde de magnésium. Ce procédé permet d'obtenir une séparation très efficace entre l'hydroxyde de magnésium et l'eau dans la solution colloïdale d'hydroxyde de magnésium, et résout également le problème de la filtration difficile des colloïdes d'hydroxyde de magnésium dans le procédé de précipitation de l'hydroxyde de magnésium classique.
PCT/CN2020/111355 2020-08-08 2020-08-26 Procédé de séparation de mousse pour solution colloïdale d'hydroxyde de magnésium WO2022032726A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010791791.XA CN111874926B (zh) 2020-08-08 2020-08-08 一种氢氧化镁胶体溶液泡沫分离的方法
CN202010791791.X 2020-08-08

Publications (1)

Publication Number Publication Date
WO2022032726A1 true WO2022032726A1 (fr) 2022-02-17

Family

ID=73211133

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/111355 WO2022032726A1 (fr) 2020-08-08 2020-08-26 Procédé de séparation de mousse pour solution colloïdale d'hydroxyde de magnésium

Country Status (2)

Country Link
CN (1) CN111874926B (fr)
WO (1) WO2022032726A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115779869A (zh) * 2022-12-09 2023-03-14 安徽朝山新材料股份有限公司 一种贵金属回收用吸附剂的制备方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112774870B (zh) * 2021-02-03 2022-10-14 核工业北京化工冶金研究院 一种高酸耗泥质砂岩型铀矿石的分选预处理方法
CN115744945B (zh) * 2022-11-23 2024-05-28 中南大学 一种疏水度可控的氢氧化镁连续制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102390848A (zh) * 2011-08-08 2012-03-28 河北科技大学 一种硫酸镁综合利用工艺
US8197696B1 (en) * 2009-12-03 2012-06-12 Bader Mansour S Methods to control the precipitation of inorganic materials and/or to scrub flue gas
CN105792942A (zh) * 2013-10-09 2016-07-20 佐治亚-太平洋化工品有限公司 捕收剂组合物及其制备和应用方法
CN106365184A (zh) * 2016-08-31 2017-02-01 合肥中科阻燃新材料有限公司 一种物理法氢氧化镁阻燃剂的提纯方法
US10773973B2 (en) * 2013-03-08 2020-09-15 Ecolab Usa Inc. Enhanced foam removal of total suspended solids and multiply charged cations from aqueous or aqueous/oil mixed phase via increased viscoelasticity

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5969406A (ja) * 1982-10-12 1984-04-19 Dowa Mining Co Ltd 単体硫黄の回収方法
CN101890398B (zh) * 2010-07-12 2013-05-29 李海红 一种具有多种功能的选矿药剂及其应用方法
CN101905897A (zh) * 2010-09-01 2010-12-08 张慧媛 一种从卤水中提取镁、锂的方法
CN110369144A (zh) * 2019-07-25 2019-10-25 瓮福（集团）有限责任公司 一种高效组合捕收剂及其制备方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8197696B1 (en) * 2009-12-03 2012-06-12 Bader Mansour S Methods to control the precipitation of inorganic materials and/or to scrub flue gas
CN102390848A (zh) * 2011-08-08 2012-03-28 河北科技大学 一种硫酸镁综合利用工艺
US10773973B2 (en) * 2013-03-08 2020-09-15 Ecolab Usa Inc. Enhanced foam removal of total suspended solids and multiply charged cations from aqueous or aqueous/oil mixed phase via increased viscoelasticity
CN105792942A (zh) * 2013-10-09 2016-07-20 佐治亚-太平洋化工品有限公司 捕收剂组合物及其制备和应用方法
CN106365184A (zh) * 2016-08-31 2017-02-01 合肥中科阻燃新材料有限公司 一种物理法氢氧化镁阻燃剂的提纯方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115779869A (zh) * 2022-12-09 2023-03-14 安徽朝山新材料股份有限公司 一种贵金属回收用吸附剂的制备方法
CN115779869B (zh) * 2022-12-09 2024-02-20 安徽朝山新材料股份有限公司 一种贵金属回收用吸附剂的制备方法

Also Published As

Publication number Publication date
CN111874926B (zh) 2021-10-26
CN111874926A (zh) 2020-11-03

Similar Documents

Publication Publication Date Title
WO2022032726A1 (fr) Procédé de séparation de mousse pour solution colloïdale d'hydroxyde de magnésium
CN113620331B (zh) 一种co2矿化电石渣制备纳米球霰石碳酸钙方法
CN109650430B (zh) 一种高镁含量石灰石制备纳米碳酸钙的方法
CN102757075B (zh) 一种不同结构和形貌碳酸钙粉体的制备方法
CN102784604A (zh) 气体水合物生成促进剂及其制法和应用
CN105413855B (zh) 一种钨粗精矿精选提纯的方法
CN103449486B (zh) 一种铝酸钠溶液与碳酸氢钠液相法碳分制备一水软铝石的方法
CN115215339B (zh) 一种由电石渣制备碳酸钙碳化晶核并进行固废固碳的方法
CN110563007B (zh) 一种利用氧化钙及二氧化碳将硫酸钠转化为碳酸氢钠的方法
CN111468301B (zh) 一种分步沉淀浮选回收盐湖镁资源的方法
CN109701752A (zh) 菱镁矿环保浮选药剂及其处理工艺
CN109678167B (zh) 一种从提锂含硼废液生产硼酸的方法
CN113149056B (zh) 一种微气泡强化碳化制备碳酸钙的方法
CN107344724A (zh) 一种简易高效降低盐湖卤水中镁含量的方法
CN110589866B (zh) 一种利用钢渣制备超细粉体球霰石的方法
CN115043421A (zh) 一种蹴鞠球状沉淀碳酸钙及其制备方法
CN110589865B (zh) 一种利用钢渣制备疏松多孔方解石的方法
CN113976331A (zh) 通过浮选传质动力学调控制备高纯硫铁矿的方法
CN112662900A (zh) 共沉淀酸溶解选择性沉淀协同回收浸出母液中稀土的方法
CN112340778A (zh) 一种强化含铬废水常温合成的含铬尖晶石磁学性能的方法
CN112225660B (zh) 一种饲料级甲酸钙的制备方法
CN105503441A (zh) 一种利用硫酸亚铁制备缓释铁肥的方法
CN114906857B (zh) 煤矸石的处理方法及从煤矸石制得的氧化硅纳米片、多孔硅酸盐材料和铁红
CN109678191A (zh) 一种利用芥子酸调控制备球霰石碳酸钙的方法
Wang et al. A review on fly ash high-value synthesis utilization and its prospect

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20949223

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20949223

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 20949223

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 23/10/2023)