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JPS56164016A - Recovering method of uranium in very small amount from seawater - Google Patents

Recovering method of uranium in very small amount from seawater

Info

Publication number
JPS56164016A
JPS56164016A JP6717480A JP6717480A JPS56164016A JP S56164016 A JPS56164016 A JP S56164016A JP 6717480 A JP6717480 A JP 6717480A JP 6717480 A JP6717480 A JP 6717480A JP S56164016 A JPS56164016 A JP S56164016A
Authority
JP
Japan
Prior art keywords
seawater
uranium
added
amount
precipitated
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP6717480A
Other languages
Japanese (ja)
Inventor
Taichiro Fujinaga
Koichi Mukai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NIKKEI GIKEN KK
Nippon Light Metal Research Laboratory Ltd
Original Assignee
NIKKEI GIKEN KK
Nippon Light Metal Research Laboratory Ltd
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 NIKKEI GIKEN KK, Nippon Light Metal Research Laboratory Ltd filed Critical NIKKEI GIKEN KK
Priority to JP6717480A priority Critical patent/JPS56164016A/en
Publication of JPS56164016A publication Critical patent/JPS56164016A/en
Pending legal-status Critical Current

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  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

PURPOSE: To capture uranium efficiently, by adjusting the pH of seawater to a specific value with calcium oxide or calcium hydroxide or both added thereto.
CONSTITUTION: Ca(OH)2 or CaO powder capable of forming Ca(OH)2 by the hydration thereof or a mixture thereof is added to adjust the pH of seawater to 10W11. Uranium complexes in the seawater are converted into hydroxide complexes and (co)precipitated on positively charged Mg(OH)2 to be precipitated in the seawater. The Mg(OH)2 begins precipitating just on addition of the Ca(OH)2, and deposited almost quantitatively up to the addition of a certain amount. The relation between the amount of the added calcium hydroxide and the pH is as shown in the figure. The uranium recovery ratio is low below the added amount of about 150mg/l. However, the recovery ratio is sufficiently high above about 1g/l. Therefore, the uranium content in the total coprecipitated amount is reduced to increase the separating cost in the next step.
COPYRIGHT: (C)1981,JPO&Japio
JP6717480A 1980-05-22 1980-05-22 Recovering method of uranium in very small amount from seawater Pending JPS56164016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6717480A JPS56164016A (en) 1980-05-22 1980-05-22 Recovering method of uranium in very small amount from seawater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6717480A JPS56164016A (en) 1980-05-22 1980-05-22 Recovering method of uranium in very small amount from seawater

Publications (1)

Publication Number Publication Date
JPS56164016A true JPS56164016A (en) 1981-12-16

Family

ID=13337259

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6717480A Pending JPS56164016A (en) 1980-05-22 1980-05-22 Recovering method of uranium in very small amount from seawater

Country Status (1)

Country Link
JP (1) JPS56164016A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62235218A (en) * 1986-04-04 1987-10-15 Unitika Ltd Method for separating and recovering uranium and hydrofluoric acid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62235218A (en) * 1986-04-04 1987-10-15 Unitika Ltd Method for separating and recovering uranium and hydrofluoric acid
JPH0251850B2 (en) * 1986-04-04 1990-11-08 Yunichika Kk

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