The invention relates to a process for producing dimethyl ether (DME). The invention provides that a first and a second reaction zone in which catalyst fills are arranged between two adjacent pillow plates and are traversable by the respective input gas are arranged in a common synthesis reactor. The pillow plates are traversable by a fluid cooling medium. The DME-containing product gas stream exiting the synthesis reactor is resolved into a DME end product stream, a gas byproduct stream containing unconverted carbon oxides and hydrogen, a methanol byproduct stream and a wastewater stream. The gas byproduct stream is at least partially returned to the reactor inflow to increase the altogether achieved DME yield.

A process for the selective dimerization and etherification of isoolefins. The process including feeding a mixed C5 stream to a selective hydrogenation unit to convert dienes to olefins and isoolefins, producing a hydrogenated effluent stream. The hydrogenated effluent stream is fed to a first fixed bed reactor, producing a first reactor effluent. The first reactor effluent is fed to a catalytic distillation reactor system, producing a first overheads including unreacted olefins, isoolefins, oxygenate, and one or more C5 ethers and a first bottoms including dimers of the isoolefins, any produced trimers of the isoolefins, and heavy oxygenates. The first overheads is fed to a second fixed bed reactor, producing a second reactor effluent including dimers of the isoolefins, unreacted C5s, and unreacted oxygenates. The first bottoms stream and the second reactor effluent are combined and fed to a product splitter, producing a second overheads stream including unreacted C5 olefins, isoolefins, and oxygenates and a second bottoms stream including C10+ hydrocarbons.

A process for the selective dimerization and etherification of isoolefins. The process including feeding a mixed C5 stream to a selective hydrogenation unit to convert dienes to olefins and isoolefins, producing a hydrogenated effluent stream. The hydrogenated effluent stream is fed to a first fixed bed reactor, producing a first reactor effluent. The first reactor effluent is fed to a catalytic distillation reactor system, producing a first overheads including unreacted olefins, isoolefins, oxygenate, and one or more C5 ethers and a first bottoms including dimers of the isoolefins, any produced trimers of the isoolefins, and heavy oxygenates. The first overheads is fed to a second fixed bed reactor, producing a second reactor effluent including dimers of the isoolefins, unreacted C5s, and unreacted oxygenates. The first bottoms stream and the second reactor effluent are combined and fed to a product splitter, producing a second overheads stream including unreacted C5 olefins, isoolefins, and oxygenates and a second bottoms stream including C10+ hydrocarbons.

Systems and processes for the efficient conversion of high concentration isoolefin streams to tertiary alkyl ethers are disclosed. The systems and processes may include a feed system to advantageously divide the high concentration isoolefin feed to multiple fixed bed reactors and a catalytic distillation reactor to control the reaction exotherm and achieve a high isoolefin conversion.

Systems and processes for the efficient conversion of high concentration isoolefin streams to tertiary alkyl ethers are disclosed. The systems and processes may include a feed system to advantageously divide the high concentration isoolefin feed to multiple fixed bed reactors and a catalytic distillation reactor to control the reaction exotherm and achieve a high isoolefin conversion.

Systems and processes for the efficient conversion of high concentration isoolefin streams to tertiary alkyl ethers are disclosed. The systems and processes may include a feed system to advantageously divide the high concentration isoolefin feed to multiple fixed bed reactors and a catalytic distillation reactor to control the reaction exotherm and achieve a high isoolefin conversion.

The present invention provides new stable crystalline N-iodoamides-1-iodo-3,5,5-trimethylhydantoin (1-ITMH) and 3-iodo-4,4-dimethyl-2-oxazolidinone (IDMO). The present invention further provides a process for the preparation of organic iodides using N-iodoamides of this invention and recovery of the amide co-products from waste water.

The present invention provides new stable crystalline N-iodoamides-1-iodo-3,5,5-trimethylhydantoin (1-ITMH) and 3-iodo-4,4-dimethyl-2-oxazolidinone (IDMO). The present invention further provides a process for the preparation of organic iodides using N-iodoamides of this invention and recovery of the amide co-products from waste water.

The present invention provides new stable crystalline N-iodoamides-1-iodo-3,5,5-trimethylhydantoin (1-ITMH) and 3-iodo-4,4-dimethyl-2-oxazolidinone (IDMO). The present invention further provides a process for the preparation of organic iodides using N-iodoamides of this invention and recovery of the amide co-products from waste water.

A process for the production of C.sub.4 olefins, which may include: contacting a hydrocarbon mixture comprising alpha-pentenes with an isomerization catalyst to form an isomerization product comprising beta-pentenes; contacting ethylene and the beta-pentenes with a first metathesis catalyst to form a first metathesis product comprising butenes and propylene, as well as any unreacted ethylene and C.sub.5 olefins; and fractionating the first metathesis product to for an ethylene fraction, a propylene fraction, a butene fraction, and a C.sub.5 fraction.