Method for producing an alkene oxide
AssigneeBASF SE
InventorsHans-Georg Goebbel, Peter Bassler, Joaquim Henrique Teles, Peter Rudolf
Life of this patent
Estimating the term…
Abstract
Process for preparing an alkene oxide, which comprises at least the steps (i), (ii) and (v): (i) providing a stream S1 comprising compressed, liquid alkene; (ii) depressurizing at least part of the stream S1 with absorption of heat and with at least partial vaporization of the liquid alkene; (v) reacting the alkene obtained in (ii) with a hydroperoxide in the presence of at least one solvent and at least one catalyst to give a mixture comprising alkene oxide and the solvent or solvents.
Claims16
A process for preparing an alkene oxide, comprising
- (i) providing a stream S1 comprising a compressed, liquid alkene;
- (ii) depressurizing at least part of the stream S1 with absorption of heat and with at least partial vaporization of the liquid alkene;
- and
- (iii) reacting the alkene obtained in (ii) with a hydroperoxide in the presence of at least one solvent and at least one catalyst to form a mixture comprising an alkene oxide and the at least one solvent.
A process for preparing an alkene oxide, which comprises:
- (i) providing a stream S1 comprising a compressed, liquid alkene;
- (ii) depressurizing at least part of the stream S1 with absorption of heat and with at least partial vaporization of the liquid alkene;
- and
- (iii) reacting the alkene obtained in (ii) with a hydroperoxide in the presence of at least one solvent and at least one catalyst to form a mixture comprising an alkene oxide and the at least one solvent,
- wherein the alkene is propene, the hydroperoxide is hydrogen peroxide, the catalyst is a titanium silicalite catalyst and the solvent is methanol.
A process for preparing an alkene oxide, which comprises:
- (i) providing a stream S1 comprising a compressed, liquid alkene;
- (ii) depressurizing at least part of the stream S1 with absorption of heat and with at least partial vaporization of the liquid alkene;
- (iii) reacting the alkene obtained in (ii) with a hydroperoxide in the presence of at least one solvent and at least one catalyst to form a mixture comprising the alkene oxide and the at least one solvent;
- wherein the alkene is propene, the hydroperoxide is hydrogen peroxide, the catalyst is a titanium silicalite catalyst and the solvent is methanol,
- wherein in (ii) the stream S1 is depressurized into at least one heat exchanger and the heat absorbed by the alkene during the depressurizing is taken from at least one refrigerant to form a cooled refrigerant, and wherein the cooled refrigerant is used for cooling purposes in at least one sub-operation of the process,
- wherein the sub-operation of the process includes condensing a vapor which consists essentially of the alkene oxide and is obtained by separating the alkene oxide from a mixture (M1) comprising the alkene oxide and the at least one solvent by distillation, and
- wherein the mixture (M1) is obtained from a process comprising:
- (iv) reacting the alkene obtained in (ii) with a hydroperoxide in the presence of at least one solvent and at least one catalyst to give a mixture (M0) comprising the alkene oxide, the alkene and the at least one solvent;
- and
- (v) separating the alkene from the mixture (M0) to form a mixture (M1) comprising the alkene oxide at the at least one solvent;
- and
- wherein the process further comprises:
- (vi) dissolving the alkene obtained in (ii) in at least one of the solvents present during the reacting (iv) or the reacting (iii) to form a solution;
- and
- (vii) introducing the solution obtained in (vi) into an apparatus in which the reacting (iii) or the reacting (iv) is carried out.
Dependencies are inferred from the claim text.