Abstract:
A process including contacting one or more monomers, at least one catalyst system, and at least two condensing agents under polymerizable conditions to produce a polyolefin polymer is provided where the vapor pressure of the condensing agents is ±4 bara of the optimum vapor pressure given by the formula: optimum vapor pressure=614−716*D+2.338*P+3.603*ln(MI), where the optimum vapor pressure has units (bara), D is the polyolefin polymer density with units (g/cc), P is the polymerization condition pressure with units (barg), and MI is the polyolefin polymer melt index with units (g/10 min). The invention also relates to a process where at least three condensing agents are used.
Abstract:
Disclosed herein are processes for producing neopentane. The processes generally relate to demethylating neohexane and/or neoheptane to produce neopentane. The neohexane and/or neoheptane may be provided by the isomerization of C6-C7 paraffins.
Abstract:
The invention relates to hydrocarbon pyrolysis, to equipment and materials useful for hydrocarbon pyrolysis, to processes for carrying out hydrocarbon pyrolysis, and to the use of hydrocarbon pyrolysis for. e.g., natural gas upgrading. The pyrolysis can be carried out in a reverse-flow reactor.
Abstract:
This disclosure relates to naphthalene-1,8-dicarboxylate ester compounds, lubricating oil base stocks comprising naphthalene-1,8-dicarboxylate ester compounds, lubricating oil compositions comprising such base stocks, and method of making such base stocks. The lubricating oil base stocks comprising naphthalene-1,8-dicarboxylate ester compounds exhibit desirable lubricating properties such as polarity.
Abstract:
In a process for producing phenol, benzene is reacted with a source of hydrogen containing methane in the presence of a hydroalkylation catalyst under conditions effective to produce a hydroalkylation reaction effluent comprising cyclohexylbenzene, benzene, hydrogen, and methane. A first stream comprising hydrogen, methane, and benzene is removed from the hydroalkylation reaction effluent and the first stream is washed with a second stream containing cyclohexylbenzene to produce a benzene-depleted hydrogen stream containing hydrogen and methane and a wash stream containing cyclohexylbenzene and benzene.
Abstract:
This invention relates to a dimethylterephthalate production process comprising reacting substituted furan with ethylene under cycloaddition reaction conditions and in the presence of a cycloaddition catalyst to produce a bicyclic ether, dehydrating the bicyclic ether to produce a substituted phenyl, dissolving said substituted phenyl in methanol, and oxidizing and esterifying the substituted phenyl in the presence of an oxidative esterification catalyst to form dimethylterephthalate. Importantly, the process does not include oxidizing the substituted phenyl to form terephthalic acid.
Abstract:
In a process for separating methylcyclopentanone from a mixture comprising methylcyclopentanone and cyclohexanone, a feedstock comprising cyclohexanone, methylcyclopentanone, water at a concentration of at least 0.10 wt %, and optionally phenol is fed into a fractionation distillation column, where a lower effluent rich in cyclohexanone and an upper effluent rich in methylcyclopentanone are produced. Due to the inclusion of water at a relatively high concentration in the feedstock, efficient separation of methylcyclopentanone is achieved. In certain particularly desirable embodiments, the lower effluent is substantially free of methylcyclopentanone. The thus produced cyclohexanone may be used to make, e.g., high-purity caprolactam, which, in turn, may be used for fabricating, e.g., high-performance nylon-6 material.
Abstract:
In a process for separating methylcyclopentanone from a mixture comprising methylcyclopentanone and cyclohexanone, a feedstock comprising cyclohexanone, methylcyclopentanone, water at a concentration of at least 0.10 wt %, and optionally phenol is fed into a fractionation distillation column, where a lower effluent rich in cyclohexanone and an upper effluent rich in methylcyclopentanone are produced. Due to the inclusion of water at a relatively high concentration in the feedstock, efficient separation of methylcyclopentanone is achieved. In certain particularly desirable embodiments, the lower effluent is substantially free of methylcyclopentanone. The thus produced cyclohexanone may be used to make, e.g., high-purity caprolactam, which, in turn, may be used for fabricating, e.g., high-performance nylon-6 material.
Abstract:
In a process for dealkylating a poly-alkylated aromatic compound, a feed comprising at least one poly-alkylated aromatic compound selected from polypropylbenzene, polybutylbenzene, and polycyclohexylbenzene is introduced into a reaction zone. The feed is then contacted in the reaction zone with an acid catalyst under conditions effective to dealkylate at least a portion of the poly-alkylated aromatic compound and produce a first reaction product comprising at least one mono-alkylated aromatic compound.
Abstract:
In a process for dealkylating a poly-alkylated aromatic compound, a feed comprising at least one poly-alkylated aromatic compound selected from polypropylbenzene, polybutylbenzene, and polycyclohexylbenzene is introduced into a reaction zone. The feed is then contacted in the reaction zone with an acid catalyst under conditions effective to dealkylate at least a portion of the poly-alkylated aromatic compound and produce a first reaction product comprising at least one mono-alkylated aromatic compound.