WO1989000885A1 - Agent adsorbant - Google Patents

Agent adsorbant Download PDF

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Publication number
WO1989000885A1
WO1989000885A1 PCT/JP1987/000430 JP8700430W WO8900885A1 WO 1989000885 A1 WO1989000885 A1 WO 1989000885A1 JP 8700430 W JP8700430 W JP 8700430W WO 8900885 A1 WO8900885 A1 WO 8900885A1
Authority
WO
WIPO (PCT)
Prior art keywords
adsorbent
uranium
metal
oxygen
containing atmosphere
Prior art date
Application number
PCT/JP1987/000430
Other languages
English (en)
Japanese (ja)
Inventor
Yoshio Tsunoda
Original Assignee
Yoshio Tsunoda
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
Priority claimed from JP60293075A external-priority patent/JPS62152538A/ja
Application filed by Yoshio Tsunoda filed Critical Yoshio Tsunoda
Priority to PCT/JP1987/000430 priority Critical patent/WO1989000885A1/fr
Publication of WO1989000885A1 publication Critical patent/WO1989000885A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B60/00—Obtaining metals of atomic number 87 or higher, i.e. radioactive metals
    • C22B60/02—Obtaining thorium, uranium, or other actinides
    • C22B60/0204—Obtaining thorium, uranium, or other actinides obtaining uranium
    • C22B60/0217—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes
    • C22B60/0252—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes treatment or purification of solutions or of liquors or of slurries
    • C22B60/0265—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes treatment or purification of solutions or of liquors or of slurries extraction by solid resins
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
    • C22B3/24—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition by adsorption on solid substances, e.g. by extraction with solid resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention relates to a novel adsorbent. More specifically, the present invention relates to an adsorbent effective for recovering a useful substance present at a relatively low concentration in a large amount of a solution from a large amount of a solution. It is useful for recovering existing heavy metals such as uranium.
  • BACKGROUND ART Conventionally, activated carbon, ion-exchange resin, zeite light, activated alumina, silicate, and the like are generally used for recovery of heavy metals present at a relatively low concentration in an aqueous solution.
  • adsorbents used for the recovery of uranium, particularly for the recovery of uranium from seawater.
  • These adsorbents include metal oxides and water as inorganic ones. Oxides, sulfides, and ferro-cyanide compounds are known, and a great deal of research has been conducted on titanium hydroxide.
  • the present inventors have conducted intensive research to develop an adsorbent having a high adsorptivity for heavy metals such as lanthanum, and as a result, have obtained a product obtained by heat-treating a mixture of a metal oxide and a metal sulfur compound. Surprisingly, it has been shown that heavy metals such as uranium exhibit a much higher adsorption capacity than titanic acid, which has been known as one of the binding agents with high adsorption capacity. And found the present invention.
  • a small amount selected from the first group consisting of a metal oxide and a metal compound that partially or entirely generates a metal oxide by high-temperature heating in an oxygen-containing atmosphere At least one kind and at least one kind selected from the second group consisting of a metal sulfur compound and a metal compound that partially or entirely generates a metal sulfur compound by high-Heen heating in an oxygen-containing atmosphere. And subjected to high-temperature heating in an oxygen-containing atmosphere
  • An adsorbent characterized by comprising a product obtained by the above is provided.
  • the first group of metal oxides and metal compounds includes ⁇ , ⁇ , ⁇ , ⁇ A, 1 ⁇ , IVA, WB, VA, YttB, and ⁇ of the periodic table. Oxides and compounds of elements belonging to each group of ⁇ may be mentioned. Examples of the metal compound which partially or entirely generates a metal oxide by heating at a high temperature in an oxygen-containing atmosphere, for example, in the air, include: , Hydroxide, carbonate, oxalate and the like.
  • the use of the above metal compound (eg, oxalate) rather than the use of oxides of the above-mentioned elements prepared in advance makes it possible for the adsorbent to have a higher adsorbent capacity. Is generally found to be better.
  • Examples of the second group of metal sulfur compounds and metal compounds include sulfides and sulfur compounds of elements belonging to each of the above-mentioned groups in the periodic table, and include those in an oxygen-containing atmosphere, for example, in the air.
  • Examples of the metal compound which partially or entirely generates a metal sulfur compound by heating and heating include, for example, sulfate.
  • a mixture of at least one first component selected from the first group and at least one second component left from the second group is mixed in an oxygen-containing atmosphere, for example, in air.
  • Heating to high temperature The heating temperature may be any temperature at which the mixture is in a burning state, and is not particularly limited, but is generally about 700 to about 800 ° C. Calo heat time is not particularly critical, but generally 5 to 15 minutes It is.
  • the weight ratio of the first component to the second component is generally 0.5 to 3, preferably 1 to 2 by weight.
  • the resulting product is generally in powder form and is very easy to handle.
  • the product thus obtained can be used as it is as the adsorbent of the present invention, but can also be used in combination with other adsorbents.
  • the adsorption operation can be performed as follows.
  • the first method is to put the adsorbent in powder form into seawater, stir well, and then separate the adsorbent from the seawater by sedimentation or filtration.
  • the operation also requires a long time and other difficulties are often not practical.
  • the powdered adsorbent is granulated with a suitable granulating agent, and ⁇ ⁇ the adsorbent is converted to a column and packed in a column or the like. Seawater is continuously passed through the column. Then, uranium is adsorbed. Next, uranium is desorbed from the adsorbent and recovered. This method is industrially advantageous.
  • the third method is a method utilizing the fact that the adsorbent of the present invention is generated by heating at a high temperature. That is, the raw material of the adsorbent according to the present invention is mixed with a substance formed by heating, such as clay, and the mixture is appropriately shaped.
  • This is a method in which a heat treatment is performed to form a molded article having an arbitrary shape including the adsorbent, and the molded article is subjected to, for example, the second method. This is a very industrially advantageous method.
  • the novel adsorbent according to the present invention has an extremely high adsorptivity for heavy metals such as uranium, and its production method is simple and easy to handle. If it is used to recover uranium from uranium, its extremely high adsorptivity will enable industrial uranium collection to be realized. Further, as shown in Examples, the adsorption of heavy metals to the adsorbent of the present invention can be achieved only by bringing the adsorbent of the present invention into contact with the solution containing the heavy metal to be recovered for a short period of time. It is extremely advantageous in industry.
  • the adsorbent of the present invention is prepared at a high temperature, there is a feature that the adsorbent retains the adsorption ability even at a high temperature. This is advantageously applied, for example, to the purification of a liquid at a high temperature.
  • aqueous solution having a uranium equilibrium concentration of 1 g / ⁇ was prepared by adding 1 wt.% Aqueous solution of peranil sodium carbonate to distilled water to prepare a test solution.
  • This test solution 80m ⁇ was placed in a 200 ⁇ Erlenmeyer-flush, to which the above adsorbent (lg) was added, and stirred well at room temperature for 1 minute. Next, this was separated and the amount of uranium in the solution was quantified to determine the amount of adsorption. As a result, the amount of uranium adsorbed per lg of the adsorbent was 58iiig.
  • an aqueous solution having a peran concentration of 10 / &apos was prepared in the same manner as described above and used as a test solution.
  • This test solution 20 & was placed in a 30 ⁇ container, and the above adsorbent 50D] g was added thereto, followed by stirring at room temperature for 1 minute. Next, this was separated, and the amount of silane in the obtained liquid was quantified to determine the amount of adsorption.
  • the amount of uranium adsorbed per lg of the adsorbent was 1.2 mg .
  • the amount of adsorbent prepared from 1 part by weight of lead sulfide, 1 part by weight of lead oxalate, and 2 parts by weight of stannous oxalate is as follows: Adsorbent 1 when uranium equilibrium concentration lg / ⁇ It was 59 mg per g.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Inorganic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

On prépare un agent adsorbant en mélangeant au moins une substance sélectionnée dans un premier groupe composé d'oxydes métalliques et de composés métalliques pouvant former partiellement ou entièrement des oxydes métalliques lorsqu'on les chauffe dans une atmosphère contenant de l'oxygène, avec au moins une substance sélectionnée dans un deuxième groupe composé de sulfures métalliques et de composés métalliques pouvant former partiellement ou entièrement des sulfures métalliques lorsqu'on les chauffe dans une atmosphère contenant de l'oxygène, et en chauffant le mélange dans une atmosphère contenant de l'oxygène. Cet agent adsorbant présente une capacité remarquablement élevée d'adsorption de métaux lourds tels que l'uranium. Grâce à cette capacité, l'agent adsorbant ci-décrit, que l'on peut produire et manipuler aisément, peut être utilisé pour l'extraction à l'échelle industrielle de l'uranium contenu dans l'eau de mer.
PCT/JP1987/000430 1985-12-27 1987-06-26 Agent adsorbant WO1989000885A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP1987/000430 WO1989000885A1 (fr) 1985-12-27 1987-06-26 Agent adsorbant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP60293075A JPS62152538A (ja) 1985-12-27 1985-12-27 吸着剤
PCT/JP1987/000430 WO1989000885A1 (fr) 1985-12-27 1987-06-26 Agent adsorbant

Publications (1)

Publication Number Publication Date
WO1989000885A1 true WO1989000885A1 (fr) 1989-02-09

Family

ID=26428143

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1987/000430 WO1989000885A1 (fr) 1985-12-27 1987-06-26 Agent adsorbant

Country Status (1)

Country Link
WO (1) WO1989000885A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4941868B1 (fr) * 1970-05-01 1974-11-12
JPS5049181A (fr) * 1973-08-31 1975-05-01
JPS5013727B1 (fr) * 1969-06-06 1975-05-22
JPS5276284A (en) * 1975-12-18 1977-06-27 Inst Francais Du Petrole Method of removing mercury exist in gases or liquids
JPS5456089A (en) * 1977-10-12 1979-05-04 Kyowa Kagaku Kougiyou Kk Desulfurizing agent

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5013727B1 (fr) * 1969-06-06 1975-05-22
JPS4941868B1 (fr) * 1970-05-01 1974-11-12
JPS5049181A (fr) * 1973-08-31 1975-05-01
JPS5276284A (en) * 1975-12-18 1977-06-27 Inst Francais Du Petrole Method of removing mercury exist in gases or liquids
JPS5456089A (en) * 1977-10-12 1979-05-04 Kyowa Kagaku Kougiyou Kk Desulfurizing agent

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