683results about "Ether preparation by compound addition" patented technology

A process for preparing low-water ethanol from at least two streams of relatively water-rich ethanol that have a different water content by dewatering at membranes. The low-water ethanol can be used to prepare ethyl tert-butyl ether (ETBE).

A catalytic reaction / rectification integrated process is provided, which includes: reaction raw materials are pre-heated and then mixed with catalysts; the resulting mixture is fed into a jet mixing reaction section 6 of a catalytic reaction / rectification integrated tower through a feed port, wherein the jet mixing reaction section 6 is a kettle-like reactor in the middle of the catalytic reaction / rectification integrated tower T-01; after the reaction raw materials are pressurized by a centrifugal pump, a subsonic or transonic jet mixer 33 inside the jet mixing reaction section 6 jets the reaction raw materials at a high speed into the jet mixing reaction section 6 and performs high-efficiency mixing of solid and liquid phases inside the jet mixing reaction section 6, thereby enhancing the heat and the mass transfer efficiencies during the process; the reaction mixture is directly separated and purified inside the catalytic reaction / rectification integrated tower. Therefore, the catalytic reaction / rectification integrated process has high conversion rate and production capacity and low energy consumption and production cost. The process is used for esterification, alcohol synthesis from alkenes and water, and the ether synthesis from alkenes and alcohols. A special catalytic reaction / rectification integrated tower is also provided.

A selectivated molecular sieve, e.g., ZSM-22 or ZSM-23, is used as olefin oligomerization catalyst to provide product, e.g., octenes and dodecenes from butene, having a low degree of branching and hindered double bonds.

A method for forming propylene wherein ethylene is employed as a primary feed material in a combination of steps comprising dehydration, skeletal isomerization, and metathesis to form a versatile product mix that can contain one or more of propylene, gasoline, MTBE, and propylene oxide.

Disclosed are compositions comprising a compound having the formula CF3(CF2)xCF═CFCF(OR)(CF2)yCF3, wherein R is CH3 or C2H5or mixtures thereof, and wherein x and y are independently 0, 1, 2 or 3, and wherein x+y=1, 2 or 3. Also disclosed are unsaturated fluoroethers selected from the group consisting of CF3(CF2)xCF═CFCF(OR)(CF2)yCF3, CF3(CF2)xC(OR)═CFCF2(CF2)yCF3, CF3CF═CFCF(OR)(CF2)x(CF2)yCF3, CF3(CF2)xCF═C(OR)CF2(CF2)yCF3, and mixtures thereof, wherein R can be either CH3, C2H5 or mixtures thereof, and wherein x and y are independently 0, 1, 2 or 3, and wherein x+y=0, 1, 2 or 3. Also disclosed herein are novel methods of making a composition comprising at least one of the compounds described.