USE OF NOVEL COMPOUNDS FOR SELECTIVELY EXTRACTING RARE EARTHS FROM AQUEOUS SOLUTIONS INCLUDING PHOSPHORIC ACID AND ASSOCIATED EXTRACTION METHOD
申请人:COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
公开号:US20180142321A1
公开(公告)日:2018-05-24
The invention relates to the use, as an extraction agent for extracting at least one rare earth from an aqueous phase including phosphoric acid, of at least one compound of the following general formula (I):
where
n is an integer equal to 0, 1 or 2,
R
1
and R
2
are H or an aliphatic hydrocarbon group,
one of R
3
and R
4
has the following formula (II):
where R
5
and R
6
are a hydrocarbon, hydroxyl or alkoxyl group, and
the other one of R
3
and R
4
has one of the following formulas (II′) and (III):
where R
5
′ and R
6
′ are a hydrocarbon, hydroxyl or alkoxyl group, and R
7
and R
8
are H or an aliphatic hydrocarbon group.
The invention also relates to a method for recovering at least one rare earth using said compound, as well as to specific compounds as such.
PROCESS FOR PREPARING PHOSPHORUS COMPOUNDS HAVING PHOSPHATE-PHOSPHONATE BOND
申请人:Fujimoto Kazuo
公开号:US20090062554A1
公开(公告)日:2009-03-05
A novel process for preparing in a high purity and in a high yield phosphorus compounds having a phosphate-phosphonate bond within one molecule, along with only a small amount of a by-product, without being restricted by the kind of a phosphonate having an alcoholic hydroxyl group which is a raw material, without using a catalyst such as magnesium chloride, but only using a nitrogen-containing basic compound.
PROCESSES FOR PRODUCTION OF CYCLIC ALKYLENE PHOSPHOROHALIDITE AND CYCLIC PHOSPHORIC ACID ESTER
申请人:Hamada Toshiya
公开号:US20120264965A1
公开(公告)日:2012-10-18
A process for producing a cyclic alkylene phosphorohalidite, which comprises reacting a specific phosphorus trihalide with a specific alkylene glycol compound under conditions where the phosphorus trihalide is present in an excess amount relative to the amount of the alkylene glycol compound in the reaction system to order to obtain the cyclic alkylene phosphorohalidite by reacting the alkylene glycol compound with the phosphorus trihalide; and a process for producing a cyclic phosphoric acid ester by using the obtained cyclic alkylene phosphorohalidite as a raw material.
METHOD FOR PRODUCING PHOSPHORUS COMPOUND HAVING PHOSPHATE-PHOSPHONATE BOND
申请人:DAIHACHI CHEMICAL INDUSTRY CO., LTD.
公开号:EP1808437A1
公开(公告)日:2007-07-18
A novel process for preparing in a high purity and in a high yield phosphorus compounds having a phosphate-phosphonate bond within one molecule, along with only a small amount of a by-product, without being restricted by the kind of a phosphonate having an alcoholic hydroxyl group which is a raw material, without using a catalyst such as magnesium chloride, but only using a nitrogen-containing basic compound.
Use of novel compounds for selectively extracting rare earths from aqueous solutions including phosphoric acid and associated extraction method
申请人:COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
公开号:US10450629B2
公开(公告)日:2019-10-22
The invention relates to the use, as an extraction agent for extracting at least one rare earth from an aqueous phase including phosphoric acid, of at least one compound of the following general formula (I):
where
n is an integer equal to 0, 1 or 2,
R1 and R2 are H or an aliphatic hydrocarbon group,
one of R3 and R4 has the following formula (II):
where R5 and R6 are a hydrocarbon, hydroxyl or alkoxyl group, and
the other one of R3 and R4 has one of the following formulas (II′) and (III):
where R5′ and R6′ are a hydrocarbon, hydroxyl or alkoxyl group, and R7 and R8 are H or an aliphatic hydrocarbon group.
The invention also relates to a method for recovering at least one rare earth using said compound, as well as to specific compounds as such.