FIELD: chemistry.
SUBSTANCE: present invention relates to a method of regenerating a lanthanide catalyst from synthesis of diethoxysuccinate of aspartic acid. The method includes contacting a carbonate source with a solution containing lanthanide ions, formed during said synthesis, and a chelating agent, different from diethoxysuccinate of aspartic acid, for precipitation of a lanthanide carbonate followed by separation of the precipitated lanthanide carbonate from the solution, wherein said chelating agent is iminodisuccinic acid or ethylenediamine disuccinic acid. The invention also relates to a method of producing diethoxysuccinate of aspartic acid, which includes reacting diethanolamine with a maleate in alkaline conditions in the presence of a lanthanide catalyst.
EFFECT: improved regeneration of a lanthanide catalyst for synthesis of diethoxysuccinate of aspartic acid.
12 cl, 4 dwg, 4 tbl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCING MIXTURE OF CHELATING AGENTS | 2011 |
|
RU2551285C2 |
| METHOD FOR PRODUCING CHELATING AGENT MIXTURE, CHELATING AGENT MIXTURE AND ITS APPLICATION METHODS | 2018 |
|
RU2761831C2 |
| GYPSUM PRODUCT AND PREPARATION METHOD THEREOF | 2008 |
|
RU2448906C2 |
| COMPOSITIONS OF METAL COMPLEXES | 2015 |
|
RU2710360C2 |
| DETERGENT COMPOSITION CONTAINING MIXTURE OF CHELATING AGENTS | 2010 |
|
RU2499817C2 |
| METHOD FOR PRODUCING BRANCHED POLYDIENE | 2019 |
|
RU2815816C1 |
| COMPOSITION AND METHOD FOR TREATING FIBROUS MATERIAL | 2008 |
|
RU2439233C2 |
| CEST SYSTEMS PROVIDING SENSITIVITY NOT DEPENDING ON CONCENTRATION | 2011 |
|
RU2605823C2 |
| CATALYST OF HYDROCARBON CONVERSION, METHOD OF CATALYTIC REFORMING OF PARENT NAPHTHA USING CATALYST | 1997 |
|
RU2186622C2 |
| COMPOSITION CONTAINING A BUFFER | 2017 |
|
RU2757768C2 |
