Abstract:
A method for producing 3-methyl-2-pentene which is substantially free of any other C6 olefin, except 2-ethyl-1-butene, by first producing a stream that contains 2-ethyl-1-butene from the trimerization of ethylene, and second by recovering the 2-ethyl-1-butene as 3-methyl-2-pentene via etherification, separation of the ether, and decomposition of the ether back to predominantly 3-methyl-2-pentene with some 2-ethyl-1-butene.
Abstract:
Methods and systems for oligomerizing one or more olefins. The method can include introducing a first olefin to a reactor. The first olefin can be oligomerized in the presence of a catalyst within the reactor to produce an effluent that can include a second olefin and unreacted first olefin. The effluent and an isoparaffin can be introduced to a separator. The effluent can be initially contacted with the isoparaffin within the separator. The effluent can be separated within the separator to produce a second olefin product and an unreacted first olefin product. At least a portion of the unreacted first olefin product can be recycled to the reactor. At least a portion of the unreacted first olefin product can be oligomerized in the presence of the catalyst and the first olefin to produce additional second olefin.
Abstract:
A method for producing 3-methyl-2-pentene which is substantially free of any other C6 olefin, except 2-ethyl-1-butene, by first producing a stream that contains 2-ethyl-1-butene from the trimerization of ethylene, and second by recovering the 2-ethyl-1-butene as 3-methyl-2-pentene via etherification, separation of the ether, and decomposition of the ether back to predominantly 3-methyl-2-pentene with some 2-ethyl-1-butene.
Abstract:
Disclosed are dehydrogenation catalyst composites and methods of making the dehydrogenation catalyst composites. The dehydrogenation catalyst composites contain alumina, lithium oxide, alkaline earth metal oxide, chromium oxide, and sodium oxide. Also disclosed are methods of dehydrogenating a dehydrogenatable hydrocarbon involving contacting the dehydrogenatable hydrocarbon with a dehydrogenation catalyst composite containing alumina, lithium oxide, alkaline earth metal oxide, chromium oxide, and sodium oxide to provide a dehydrogenated hydrocarbon, such as an olefin.
Abstract:
The catalyst for the dimerization of propylene into methyl-4-pentene-1 comprises potassium (K) and potassium carbonate (K2CO3) and is characterized in that it further contains at least one metal (M) selected amongst manganese, chromium, cadmium, nickel, palladium and titanium. It may also include copper. The method for preparing the catalyst comprises the following steps carried out in the presence of an inert liquid having a high boiling point. In a first step, a suspension of potassium carbonate is obtained in the inert liquid. In a second step, the metal or metals (M), and optionally copper, are introduced in powder form into the highly stirred reaction medium. In a third step, after bringing the reaction medium to a temperature higher than the potassium melting temperature, potassium is introduced under high stirring conditions. In the fourth step, the reaction medium is brought to a temperature comprised between 140 and 180°C during a length of time comprised between 1 and 3 hours, and the reaction medium is then allowed to cool down to room temperature. The process for dimerization of propylene into methyl-4-pentene-1 uses the catalyst disclosed hereabove.
Abstract:
The present invention concerns a process for converting biomass into useful organic building blocks for the chemical industry. The process involves the reduction of a polyol wherein at least two of the hydroxyl groups are located on adjacent carbon atoms in the presence of a molybdenum-based catalyst of the formula (I), such as (ΝΗ 4 ) 6 Μo 7 O 24 ⋅4Η 2 0. A primary or secondary monohydric C1-C4 alcohol is used as reductant, as well as a solvent.
Abstract translation:本发明涉及将生物质转化成用于化学工业的有用的有机结构单元的方法。 该方法包括还原多元醇,其中在式(I)的钼基催化剂如(N,H 4)6 M 7 O 24·4H 2 O的存在下,其中至少两个羟基位于相邻的碳原子上。 使用一级或二级一元C 1 -C 4醇作为还原剂,以及溶剂。
Abstract:
The present invention relates to the preparation of a dehydration catalyst and a method and apparatus for dehydrating 1-alcohols to 1-alkenes with high regioselectivity. The 1-alkenes are useful in preparing copolymers with ethylene and high flashpoint diesel and jet fuels, which are useful to civilian and military applications. Furthermore, the 1-butene may be converted to 1,3-butadiene which is useful in preparing synthetic rubbers. Some linear C 4 diols can be dehydrated directly to a 1,3-butadiene.