FIELD: chemistry.
SUBSTANCE: present invention relates to a method of processing filtrate wastes from production of pentaerythritol, containing (wt %): 32-37.81 sodium formate, 22-27 pentaerythritol, 10-11 cyclic monoformals, 2-3 dipentaerythritol, as well as pentaerythritol derivative impurities, to obtain technical pentaerythritol and sodium formate. The method involves treatment of the filtrate with an extraction agent, followed by separation and recycling of the obtained liquid and solid phases. Treatment is carried with water in water/filtrate ration equal to (0.5-1.0)/1 and temperature 15-25°C, followed by taking the washed off residue to the evaporation and crystallisation step to obtain technical pentaerythritol and the filtrate solution for evaporation and crystallisation to obtain sodium formate.
EFFECT: efficient method of processing waste filtrate from production of pentaerythritol.
2 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| PENTAERYTHRITOL AND DIPENTAERYTHRITOL SYNTHESIS METHOD | 2008 |
|
RU2402519C2 |
| METHOD FOR PREPARING PENTAERYTHRITOL WITH CONTENT OF BASIC SUBSTANCE ABOVE 98 MASS % AND PENTAERYTHRITOL ENRICHED WITH DIPENTAERYTHRITOL IN AMOUNT 5-20 MASS % | 2002 |
|
RU2208009C1 |
| METHOD OF PROCESSING A HOT TECHNICAL PENTAERYTHRITE-FORMIATE MOTHER LIQUOR | 2018 |
|
RU2714326C2 |
| METHOD OF PROCESSING COMMERCIAL PENTAERYTHRITOL-FORMIATE MOTHER SOLUTION | 2010 |
|
RU2440168C1 |
| METHOD OF EXTRACTING SODIUM FORMIATE FROM PENTAERYTHRITOL-FORMIATE MOTHER SOLUTION | 2015 |
|
RU2604375C1 |
| METHOD OF PREPARING PENTAERYTHRITOL | 2000 |
|
RU2181353C2 |
| METHOD OF ISOLATING PENTAERYTHRITE AND POLYPENTAERYTHRITE | 0 |
|
SU857102A1 |
| METHOD FOR PREPARING DI- OR POLYOXY COMPOUNDS | 0 |
|
SU905225A1 |
| METHOD FOR PRODUCING PENTAERYTHRITOL | 1995 |
|
RU2110508C1 |
| METHOD OF PROCESSING TECHNICAL PENTAERYTHRITE-FORMIATE MOTHER LIQUOR | 2014 |
|
RU2558577C1 |
