Abstract:
In an embodiment, a process for producing ethylene comprising: introducing a methane stream comprising methane, oxygen, and water to a methane coupling zone; reacting the methane, the oxygen, and the water in the methane coupling zone via a methane oxidative coupling reaction to produce a first product stream; introducing the first product stream to a pyrolysis zone; and pyrolyzing ethane in the first product stream in the pyrolysis zone to produce a second product stream comprising ethylene. A heat from the methane coupling reaction is used in the pyrolysis reaction.
Abstract:
Selective supported catalysts compositions for alkane dehydrogenation are described, the catalyst compositions containing platinum, a tin component, a potassium component, one or more additional promoter elements, and a support. Also described are methods for the preparation of such catalyst compositions and methods for the use of such catalyst compositions in the conversion of alkanes to olefins.
Abstract:
The present disclosures and inventions relate to a method that includes the steps of: a) introducing a natural gas; b) reforming the natural gas; wherein the reforming step comprises contacting the natural gas with steam to produce a syngas; c) converting the syngas to a product mixture comprising an olefin; wherein the converting step comprises contacting the syngas with a Co/Mn catalyst; wherein waste water is produced prior to step d); and d) recovering the waste water; wherein some or all of the recovered waste water is added to the natural gas prior to being introduced.
Abstract:
A fertilizer composition comprises an inorganic fertilizer particle, a first layer disposed on the inorganic fertilizer particle, and a second layer disposed on the first layer wherein the first layer comprises biomaterial and the second layer comprises phosphoric acid, ammonium polyphosphate, or a combination comprising at least one of the foregoing. A method of making the fertilizer composition is also described herein.
Abstract:
The present invention is directed to a polymerization process for the production of polyethylene by polymerization of ethylene in the presence of a catalyst composition comprising a porous silicon oxide support material carrying a chromium compound and a transition metal containing compound or metal halide transition metal compound. The silicon oxide support material has an average particle size between 20 um and 40 um, a pore volume between 1.8 and 2.2 ml/g and a surface area between 400 and 600 m2/g.
Abstract:
The present disclosure relates to cement compositions comprising: (a) cement, (b) an electric arc furnace dust (EAFD), and (c) a cement accelerator; wherein the electric arc furnace dust is present in an amount from greater than 8 wt % based on the total weight of the cement (a); and it relates to cement compositions comprising: (a) cement, (b) an electric arc furnace dust (EAFD), and (c) a cement accelerator comprising calcium chloride, calcium nitrate, or sodium nitrate, or a combination thereof; wherein the electric arc furnace dust is present in an amount from greater than 8 wt % based on the total weight of the cement (a). Also disclosed are methods for making the disclosed compositions and products using the disclosed compositions. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
Abstract:
A process for oligomerization of ethylene, comprising subjecting a catalyst composition to a gas phase of ethylene and conducting an oligomerization, wherein the catalyst composition comprises (a) a chromium compound, (b) a metalated ligand, and (c) an activator or cocatalyst; and catalyst composition as well as a metalated ligand.
Abstract:
Disclosed herein is mixed fertilizer according to the process comprising: reacting isobutyraldehyde with an aqueous solution of urea in the presence of a phase transfer catalyst to form isobutylidene diurea, wherein the phase transfer catalyst is a quaternary ammonium salt; and mixing the isobutylidene diurea with at least one of another fertilizer, a secondary nutrient, a trace element, a plant protection agent, a filler, and other fertilizer ingredients, to form the mixed fertilizer. Also disclosed is isobutylidene diurea produced by the process comprising: reacting isobutyraldehyde with an aqueous solution of urea in the presence of a phase transfer catalyst to form isobutylidene diurea; wherein the phase transfer catalyst is a quaternary ammonium salt.
Abstract:
Co-extraction techniques for separating and purifying butadiene and isoprene from a C4 hydrocarbon mixture including butadiene and a C5 hydrocarbon mixture including isoprene are provided. In an exemplary embodiment, a system includes a dimerization heat exchanger, a C5 purification column; an extraction zone including a mainwasher column, a rectifier column and an afterwasher column; a distillation zone; a degassing zone; and an isoprene finishing column. The system can further include a C5 washer column, an absorption column, and a distillation column.