Abstract: 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 T1 and the value of Q is Q1, and 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 T2 and the value of Q is substantially Q2, whereby Q2 is determined by calculation and Q2 is defined by the formula Q2=Q1+B(T2?T1), wherein B denotes a constant factor which is greater than 0; a reaction syste

Abstract: 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 T1 and the value of Q is Q1, and 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 T2 and the value of Q is substantially Q2, whereby Q2 is determined by calculation and Q2 is defined by the formula Q2=Q1+B(T2?T1), wherein B denotes a constant factor which is greater than 0; a reaction syste

Abstract: A carrier that may be used in the manufacture of an olefin epoxidation catalyst is provided that is obtained from a process involving the acid digestion of aluminum metal. Also provided is an olefin epoxidation catalyst comprising a silver component deposited on the carrier. Also provided is a process for the epoxidation of an olefin employing the catalyst and a process for producing a 1,2-diol, a 1,2-diol ether, or an alkanolamine employing the olefin oxide.

Abstract: The present invention provides a process for preparing an olefin oxide by reacting an olefin having at least three carbon atoms with oxygen in the presence of a catalyst composition containing silver and an alkali metal promoter deposited on a carrier, which alkali metal promoter contains potassium in a quantity of at least 5 ?mole/g, relative to the weight of the catalyst composition, and a selectivity and work rate enhancing amount of an alkali metal selected from the group consisting of lithium and sodium and mixtures thereof. The invention also relates to a method for making a 1,2-diol or a 1,2-diol ether using the olefin oxide so prepared. Additionally, the invention relates to a catalyst composition comprising silver and a promoter deposited on a carrier.

Abstract: A process is provided for the epoxidation of an olefin comprising the steps of: contacting a feed comprising an olefin and oxygen with a catalyst comprising a silver component and a high-selectivity dopant deposited on a fluoride-mineralized carrier; and producing a product mix comprising an olefin oxide, wherein the concentration of carbon dioxide in the feed is less than about 2 mole-%, relative to the total feed.

Abstract: A process is provided for the epoxidation of an olefin comprising the steps of: contacting a feed comprising an olefin and oxygen with a catalyst comprising a silver component deposited on a fluoride-mineralized carrier; and producing a product mix comprising an olefin oxide, wherein the partial pressure of olefin oxide in the product mix is greater than about 60 kPa. A process is provided for the epoxidation of an olefin comprising the steps of: contacting a feed comprising an olefin and oxygen with a catalyst comprising a silver component and a high-selectivity dopant deposited on a fluoride-mineralized carrier; and producing a product mix comprising an olefin oxide, wherein the partial pressure of olefin oxide in the product mix is greater than about 20 kPa.

Abstract: The present invention provides a process for preparing an olefin oxide by reacting an olefin having at least three carbon atoms with oxygen in the presence of a catalyst composition containing silver and an alkali metal promoter deposited on a carrier, which alkali metal promoter contains potassium in a quantity of at least 5 ?mole/g, relative to the weight of the catalyst composition, and a selectivity and work rate enhancing amount of an alkali metal selected from the group consisting of lithium and sodium and mixtures thereof. The invention also relates to a method for making a 1,2-diol or a 1,2-diol ether using the olefin oxide so prepared. Additionally, the invention relates to a catalyst composition comprising silver and a promoter deposited on a carrier.