Selective solid catalyst for tail end of olefin-epoxidation flow reactor

1. A method for converting an olefin into an epoxide, comprising:

providing the olefin in an entrance of a flow through reactor, wherein the entrance comprises a first catalyst and an oxidant, wherein the first catalyst comprises titanium grafted on an amorphous silica support or molybdenum napthenate;

converting the olefin and the oxidant into the epoxide as the olefin and the oxidant contact the first catalyst in the entrance of the flow through reactor while moving towards a tail end of the flow through reactor; and

converting the olefin and the oxidant into the epoxide via a solid catalyst comprising a white crystalline solid with a titanium content of about 0.5 to about 1.5 weight percent (wt %) in the tail end of the flow through reactor.

2. The method of claim 1 , wherein a temperature of the entrance of the flow through reactor is approximately 40 degrees Celsius.

3. The method of claim 1 , wherein conversion of the oxidant in the tail end is greater than 80% at temperatures greater than 110 degrees Celsius.

4. The method of claim 1 , wherein the oxidant comprises an organic hydroperoxide.

5. The method of claim 1 , wherein the converting occurs with a residence time of at least one hour in the tail end of the flow through reactor.