FIELD: chemistry.
SUBSTANCE: present invention relates to a method of producing alkylene glycol which is used in antifreeze compositions, as a solvent and as base material for producing polyalkylene terephthalates. The method involves a reaction between water and alkylene oxide in at least one reactor in alkylene glycol synthesis conditions, where said at least one reactor includes an anion-exchange resin-based catalyst and said reactor operates in a direction with an ascending stream when the speed of moving from bottom-up is sufficient for expanding or fluidising the catalyst layer, with addition of carbon dioxide into the reaction mixture in an amount equal to or less than 0.1 wt % and a pH regulating additive to obtain pH ranging from about 5.0 to about 9.0. A method of producing monoethylene glycol is also provided.
EFFECT: prevent invention enables to realise the disclosed methods with a longer service life of the catalyst.
20 cl, 1 ex, 2 tbl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SOLID CATALYST USED TO CONVERT ALKYLENE OXIDE TO ALKYLENE GLYCOL | 2008 |
|
RU2470706C2 |
| METHOD FOR PREPARING ALKYLENE GLYCOLS | 1998 |
|
RU2211211C2 |
| METHOD FOR CATALYZED PRODUCTION OF ALKYLENE GLYCOL WITH RECYCLE OF REACTION PRODUCT | 2001 |
|
RU2267478C2 |
| METHOD FOR PREPARING ALKYLENE GLYCOLS | 1999 |
|
RU2222522C2 |
| ALKYLENE OXIDE HYDROLYSIS METHOD INVOLVING CATALYST-STABILIZING ADDITIVE | 1999 |
|
RU2230728C2 |
| METHOD FOR PREPARING ALKYLENE GLYCOLS AND CATALYTIC COMPOSITION FOR THEIR PREPARING | 1999 |
|
RU2233261C2 |
| METHOD OF PRODUCING ALKYLENE GLYCOL | 2008 |
|
RU2467995C2 |
| CATALYTIC HYDROLYSIS OF ALKYLENE OXIDES | 1998 |
|
RU2203879C2 |
| METHOD OF PRODUCING ALKYLENE GLYCOL | 2006 |
|
RU2410370C2 |
| METHOD OF OBTAINING ALKYLENE GLYCOL | 2009 |
|
RU2490247C2 |
