| 摘要 |
A process for the production of polymeric compounds, by the addition of from 0.8 to 1.5 equivalents of an alkali metal hydroxide to a complex containing 1 mole of nitrilotriacetic acid per mole of ions of yttrium, ar are earth metal of atomic number 58 to 71, or of a mixture of such metals. There may be an excess of up to 50% of nitrilotriacetate ion present as its sodium salt, or an excess of up to 40% mol (relative to original quantity of nitrilotriacetate) of any polyvalent metal with power of co-ordination less than or equal to that of the rear earth or Y may be present, or added later, this excess of metal ions leading to the formation of gels. In Example 2, 0.1932 g. of [Nd3+][N(CH2-3O2-)3]. 3H2O are suspended in water, and an equivalent amount of 0.1N potassium hydroxide slowly added with stirring, and the mixture digested for half an hour on the water-bath. On making up to 50 ml., a clear, highly viscous solution forms after some time. In Example 5, 8% of neodymium, calculated on the original weight of Nd present, is added to a solution as made in the last example, in the form of a solution of its chloride, and mixed well in, to give a stiff gel.ALSO:A process for the production of polymeric compounds, by the addition of from 0.8 to 1.5 equivalents of an alkali metal hydroxide to a complex containing 1 mole of nitrilotriacetic acid per mole of metal ions, the metal here being yttrium, or a rare earth of atomic number 58 to 71, or a mixture of such metals. There may be an excess of up to 50% of nitrilotriacetate ion present as its sodium salt, or an excess of up to 40 mol per cent (relative to original quantity of nitrilotriacetate) or any polyvalent metal with a power of coordination less than or equal, to that of the rare earth or Y may be present, or added later, this excess of metal ions leading to the formation of gels. In Example 2, 0.1932 g. of [Nd3+] [N(CH2 Co2)3]. 3H2O are suspended in 5 ml. of water, and an equivalent amount (5 ml.) of 0.1N potassium hydroxide slowly added with stirring, and the mixture digested for half an hour on the water-bath. On making up to 50 ml., a clear, highly viscous solution forms after some time. In Example 5, 8% of neodymium, calculated on the original weight of Nd present, is added to a solution as made in the last example, in the form of a solution of its chloride, and mixed well in, to give a stiff gel. |
