Process for the manufacture of a 1,2-epoxide and a device for carrying out said process
View Patent ↗Apparatus and processes are provided for forming epoxide compounds. In one embodiment, a process for the manufacture of an epoxide is provided including adding an oxidant, a water-soluble manganese complex and a terminal olefin to form a multiphasic reaction mixture, reacting the terminal olefin with the oxidant in the multiphasic reaction mixture having at least one organic phase in the presence of the water-soluble manganese complex, separating the reaction mixture into the at least one organic phase and an aqueous phase, and reusing at least part of the aqueous phase. The invention is also related to a device for performing the above process.
1. A process for the manufacture of an epoxide, comprising:
forming an aqueous phase comprising a water-soluble catalyst and oxidant in a reactor;
providing a terminal olefin having a water solubility ranging from 0.01 g/L to 100 g/L in an amount sufficient to form an organic phase at a volumetric ratio of the aqueous phase to the organic phase from 10:1 to 1:5;
dispersing the organic phase into aqueous phase to form organic phase droplets having an average size less than 3 mm in the aqueous phase;
reacting the terminal olefin with the oxidant in the presence of water-soluble catalyst; and
separating the organic phase from the aqueous phase, wherein the separated aqueous phase comprises the water-soluble catalyst.
2. The process of claim 1 , wherein the molar ratio of terminal olefin to oxidant comprises the range from 12:1 to 1:1.
3. The process of claim 1 , wherein the manufacture of the epoxide comprises a continuous process.
4. The process of claim 1 , wherein the oxidant comprises hydrogen peroxide, an organic peroxide a peracid or combinations thereof.
5. The process of claim 1 , wherein the reactor comprises a continuous stirred reactor, a plug flow reactor, or a loop reactor.
6. The process of claim 1 , wherein the organic phase comprises a liquid phase or a gaseous phase.
7. The process of claim 1 , further comprising reusing at least a portion of the separated aqueous phase to a second reactor, recycling at least a portion of the separated aqueous phase to the reactor, or a combination thereof.
8. The process of claim 1 , wherein the separating the organic phase from the aqueous phase comprises a centripetal force or settling.
9. The process of claim 1 , wherein the aqueous phase further comprise a buffer system.
10. The process of claim 1 , wherein the aqueous phase pH is 1 to 8.
11. The process of claim 1 , wherein the aqueous medium contains phase transfer agents, surfactants, or both.
12. The process of claim 11 , wherein the phase transfer agents comprise by quaternary ammonium salts.
13. The process of claim 1 , wherein the terminal olefin comprises the compounds of:
R—CH═CH 2 ;
R′—(CH═CH 2 ) n ;
X—CH═CH 2 ; and
Y—(CH═CH 2 ) 2 ;
wherein R is a radical of 1 or more carbon atoms optionally comprising 1 or more heteroatoms (such as oxygen, nitrogen or silicon); R′ is a multivalent radical of 1 or more carbon atoms optionally comprising 1 or more heteroatoms wherein n corresponds with the valence of the multivalent radical; X is a halogen atom, and Y is an oxygen atom.
14. The process of claim 13 , wherein the terminal olefin is selected from the group of:
(a) vinylchloride or allylchloride;
(b) 1-alkene;
(c) mono-, di- or polyallyl ethers of mono-, di- or polyols; (d) mono-, di- or polyvinyl ethers of mono-, di- or polyols; (e) mono-, di- or polyallyl esters of mono-, di- or polyacid;
(f) mono-, di- or polyvinyl esters of mono-, di- or polyacids; and
(g) divinylether or diallylether.
15. The process of claim 13 , wherein the terminal olefin comprises allyl chloride or propylene.
16. The process of claim 7 , wherein the recycling at least a portion of the separated aqueous phase to the same reactor comprises recycling a volume of recycled separated aqueous phase to a volume of aqueous components at a ratio from 10:1 to 1:10.