Patent ID: 7657332
Filing Date: 2010-02-02
Classification: C07D

Abstract:
1. A computer program product which comprises a computer readable medium and a computer readable program code, recorded on the computer readable medium, suitable for instructing a data processing system of a computer system to execute calculations for a process for the epoxidation of an olefin, which process comprises reacting a feed comprising the olefin, oxygen and a reaction modifier in the presence of a highly selective silver-based catalyst at a reaction temperature T, and with the reaction modifier being present in a relative quantity Q which is the ratio of an effective molar quantity of active species of the reaction modifier present in the feed to an effective molar quantity of hydrocarbons present in the feed, and which process comprises the steps of: operating at a first operating phase wherein the value of T is T subsequently operating at a second operating phase at a reaction temperature which is different from the reaction temperature employed in the first operating phase, such that the value of T is T wherein B denotes a constant factor which is in the range of from 0.01×10 −6 to 1×10 −6 (° C.) −1 , the relative quantity Q is in the range of from 1×10 −6 to 100×10 −6 , and the reaction temperature T is in the range of from 180 to 340° C.