FIELD: process engineering.
SUBSTANCE: invention relates to method of polyisocyanate mix fractionation. polyisocyanate mix in liquid phase is subjected to fractionation with the help of membrane that features selective permeate and polyisocyanate-compound retentate flows permeability, said flows being different and differ from initial mix.
EFFECT: higher efficiency, lower costs.
11 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING POLYISOCYANATES | 2004 |
|
RU2361857C2 |
| FLEXIBLE POLYURETHANE FOAM PRODUCTION PROCESS | 1998 |
|
RU2198187C2 |
| POLYURETHANE ELASTOMER AND METHOD OF ITS OBTAINING | 2008 |
|
RU2467024C2 |
| POLYURETHANE-CONTAINING COMPOSITIONS WITH ISOCYANATE FUNCTIONALITY | 2019 |
|
RU2781642C2 |
| METHOD OF PRODUCING XYLYLENE DIISOCYANATES (XDI) | 2017 |
|
RU2740907C2 |
| METHOD OF PRODUCING ELASTIC FOAMED POLYURETHANE | 2001 |
|
RU2270205C2 |
| PREPOLYMERS OBTAINED FROM HYDROXYMETHYL-CONTAINING POLYESTER POLYOLS DERIVED FROM FATTY ACIDS | 2005 |
|
RU2418813C2 |
| SYNTHESIS OF POLYISOCYANATES OF DIPHENYLMETHANE FAMILY | 2006 |
|
RU2415129C2 |
| ELASTIC MEMBRANE | 2018 |
|
RU2778830C2 |
| BLOCKED ISOCYANATE COMPOSITION | 2017 |
|
RU2713424C1 |
