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for removal of products of this first reaction such as ketones. ... provides advantages of simple recovery, for example by filtration, prior to regeneration. ... or silicalite structure which possess the additional properties of a 'molecular sieve", ... with acetone being the major organic product: catalysts may be used but are not ...
Europaisches Patentamt European Patent Office Office europeen des brevets

EUROPEAN PATENT APPLICATION

(1 2) (43) Date of publication:

07.02.2001 Bulletin 2001106 (21) Application number: 99500140.1 (22) Date of filing: 06.08.1999 (84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI

Padilla Polo, Ana 28903 Getafe (Madrid) (ES) Campos Martin, Jose Miquel 28045 Madrid (ES)

(74) Representative: Del Santo Abril, Natividad (71) Applicant: REPSOL QUlMlCA S.A. E-28046 Madrid (ES)

Oficina Garcia Cabrerizo, S.L., Vitruvio, 23 28006 Madrid (ES)

(72) Inventors: De Frutos Escrig, Pilar 28045 Madrid (ES) (54)

A method for continuous production of propylene oxide and other alkene oxides

Alkene oxides are produced in a continuous in(57) tegrated two-step process performed in liquid phase. Step I comprises the oxidation of a secondary alcohol with molecular oxygen to generate hydrogen peroxide at moderate temperature and pressure. This reaction mixture is introduced directly to an olefmic substrate

maintained in organic solvent at elevated pressure. During step II of the procedure the olefins undergo epoxidation by the hydrogen peroxide in the presence of a catalyst of titanium-impregnated, amorphous silica. The integrated process requires no intermediate purification or enrichment step and it is particularly well adapted to the production of propylene oxide.

Figure 1

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