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Preparation method of neodymium neodecanoic acid

A neodymium neodecanoate and neodecanoic acid technology, which is applied in the field of neodecanoate preparation, can solve the problems of yield reduction, excessive production equipment, sodium metal residue, etc., and achieve less production equipment, less electric energy and good quality Effect

Active Publication Date: 2014-03-05
福建聚创新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Neodymium neodecanoate produced by Changchun Institute of Chemistry, the molar ratio of its free acid (that is, RCOOH combined with Nd) to lanthanide metals is between 0.45 / 1 and 0.8 / 1, and its residual moisture is between 78 and Between 425ppm, neodymium neodecanoate produced by this method needs to go through steps such as extraction and filtration, so the synthesis steps require more production equipment. In addition, sodium metal will remain in the product, so the product needs to be processed again. Purification step, resulting in a decrease in yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of preparation method of neodymium neodecanoate, taking the neodymium neodecanoate of preparation 0.3mol / L as example, comprises the following steps:

[0025] (1) Dissolution of neodymium oxide: Dissolve 22 parts by weight of neodymium oxide with a purity of 99% at room temperature with 140 parts by weight of deionized water and 45 parts by weight of hydrochloric acid, and stir and dissolve using a mixer to obtain a neodymium chloride solution. The conductivity of the deionized water mentioned above is <10 us / cm, and the resistivity is ≥15MΩ;

[0026] (2) Precipitation: The neodymium chloride after step (1) is left to settle and filtered to obtain a clear neodymium chloride solution;

[0027] (3) Saponification reaction: add 170 parts by weight of neodecanoic acid and 200 parts by weight of n-hexane into the reaction vessel, mix well, add 40 parts by weight of ammonia water, and carry out saponification reaction at 60°C and normal pressure for 30 minutes;

[002...

Embodiment 2

[0032] A kind of preparation method of neodecanoate, taking the neodymium neodecanoate of preparation 0.5mol / L as example, comprises the following steps:

[0033] (1) Dissolution of neodymium oxide: Dissolve 40 parts by weight of neodymium oxide with a purity of 99% at room temperature with 165 parts by weight of deionized water and 55 parts by weight of hydrochloric acid, and stir and dissolve using a stirrer to obtain a neodymium chloride solution. The conductivity of the deionized water mentioned above is <10 us / cm, and the resistivity is ≥15MΩ;

[0034] (2) Precipitation: The neodymium chloride after step (1) is left to settle and filtered to obtain a clear neodymium chloride solution;

[0035] (3) Saponification reaction: Add 175 parts by weight of neodecanoic acid and 195 parts by weight of n-hexane into the reaction vessel, mix well, add 90 parts by weight of ammonia water, and carry out saponification reaction at 60°C and normal pressure for 35 minutes;

[0036] (4) E...

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Abstract

The invention relates to the technical field of neodymium carboxylate and provides a preparation method of neodymium neodecanoic acid. The preparation method has the advantages of safety, environmental friendliness, low consumption, time-saving property and low production cost, and the neodymium neodecanoic acid is prepared under the conditions of low temperature and normal pressure. The preparation method comprises the following steps: (1) dissolving neodymium oxide; (2) precipitating; (3) performing saponification; (4) extracting; (5) removing impurities; (6) canning.

Description

technical field [0001] The invention relates to the technical field of preparation of neodymium carboxylate, in particular to a preparation method of neodymium neodecanoate. Background technique [0002] Neodymium carboxylate has good catalytic activity in the synthesis of rare earth butadiene rubber and is the main catalyst. Butadiene rubber is currently the second largest synthetic rubber variety after styrene rubber in output, and has become the most important material for tire manufacturing because of its excellent wear resistance, good resilience and good fatigue resistance one. At the same time, with the rapid development of the automobile industry and highways, the requirements for butadiene rubber and structural performance requirements are also increasing. Therefore, efforts to improve the existing catalytic system and develop new catalysts and explore their internal mechanism have become the direction of joint efforts of the majority of scientific researchers and...

Claims

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Application Information

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IPC IPC(8): C07C53/128C07C51/41
CPCC07C51/41C07C51/412C07C51/48C07C53/128
Inventor 陈剑华
Owner 福建聚创新材料科技有限公司
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