摘要:
Trace element levels of heavy metals in crude oil are reduced by contacting the crude oil with an oxidizing agent, extracting heavy metals into a water phase for subsequent separation from the crude oil. The oxidizing agent is selected from the group of hydroperoxides, organic peroxides, inorganic peracids and salts thereof, organic peracids and salts thereof, and ozone. In one embodiment, the oxidizing agent converts heavy metals into the heavy metal cations in a water-oil emulsion, which can be subsequently separated from the crude oil, for a treated crude oil having reduced levels of heavy metals. In one embodiment, at least a complexing agent can be added to facilitate the removal by forming soluble heavy metal complexes in the water phase.
摘要:
The mercaptans R—SH contained in a hydrocarbon stream are oxidized to the corresponding (di)sulfides by means of a redox system which comprises trivalent iron and a heteropolyacid which allows the complete reoxidation of the reduced iron also with air.
摘要:
A method of synthesizing hydrocarbons from smaller hydrocarbons includes the steps of hydrocarbon halogenation, simultaneous oligomerization and hydrogen halide neutralization, and product recovery, with a metal-oxygen cataloreactant used to facilitate carbon-carbon coupling. Treatment with air or oxygen liberates halogen and regenerates the cataloreactant.
摘要:
Alkali metals and sulfur may be recovered from alkali polysulfides in an electrolytic process that utilizes an electrolytic cell having an alkali ion conductive membrane. An anolyte solution includes an alkali polysulfide and a solvent that dissolves elemental sulfur. A catholyte solution includes alkali metal ions and a catholyte solvent. Applying an electric current oxidizes sulfur in the anolyte compartment, causes alkali metal ions to pass through the alkali ion conductive membrane to the catholyte compartment, and reduces the alkali metal ions in the catholyte compartment. Sulfur is recovered by removing and cooling a portion of the anolyte solution to precipitate solid phase sulfur. Operating the cell at low temperature causes elemental alkali metal to plate onto the cathode. The cathode may be removed to recover the alkali metal in batch mode or configured as a flexible band to continuously loop outside the catholyte compartment to remove the alkali metal.
摘要:
A method of and system for reducing engine environmental atmospheric pollution emissions from a vehicle having a combustion engine utilizing hydrocarbon fuel for at least one of propulsion and auxiliary electrical power is disclosed. The method basically includes providing an unprocessed bulk fuel storage container and a clean processed fuel tank on the vehicle, supplying the engine for propulsion with fuel from the unprocessed fuel storage container when the vehicle is beyond a predetermined distance from an area having environmental restrictions passing a portion of unprocessed fuel through a desulphurization process to fill a clean fuel storage container while the vehicle is in motion and supplying the combustion engine for one of propulsion and auxiliary electrical power from clean fuel in the processed fuel storage container when the vehicle is within an area having environmental restrictions.
摘要:
An integrated process for producing a hydrocarbon stream, preferably including predominantly C5-20 normal and iso-paraffins, is disclosed. The process involves isolating a C4null stream and, optionally a C5null stream (nullnatural gas condensatenull) from a natural gas source. The C4null stream is converted to syngas, and the syngas used in a hydrocarbon synthesis process, for example, Fischer-Tropsch synthesis. In one embodiment, one or more fractions from the hydrocarbon synthesis are blended with one or more crude oil derived fractions, and, optionally, the natural gas condensate, such that the overall sulfur content of the blend is less than about 200 ppm. If necessary, the crude oil fractions and/or natural gas condensate can be treated to lower the sulfur content so that the blend has an acceptable sulfur level. The fraction from the hydrocarbon synthesis may include, for example, C5-20 hydrocarbons, C20null hydrocarbons, or C5null hydrocarbons. In this embodiment, the hydroprocessing catalysts are noble metal-containing catalysts, which tend to be sensitive to sulfur concentrations above about 200 ppm. The catalysts preferably have high selectivity for C5null products, such that a significant C4null fraction is not formed. In another embodiment, one or more fractions from the hydrocarbon synthesis are blended with one or more crude oil derived fractions, and, optionally, the natural gas condensate, such that the overall sulfur content of the blend is more than about 200 ppm. The fraction from the hydrocarbon synthesis may include, for example, C5-20 hydrocarbons, C20null hydrocarbons, or C5null hydrocarbons. In this embodiment, conventional sulfur-tolerant hydroprocessing catalysts can be used.
摘要:
A process for purifying a liquid hydrocarbon feedstock containing organo-sulfur compounds wherein an aqueous sulfuric acid solution containing ions of a transition metal, such as vanadium, chromium, manganese, cobalt, cerium or mixtures thereof, is subject to electrolysis to oxidize the metal ions to a higher oxidation state, the electrolyzed solution is emulsified with the feedstock to achieve oxidation of the organo-sulfur compounds to form water soluble sulfur compounds, gaseous products, resinous products; the spent aqueous acidic solution and the purified hydrocarbon product are separated and the spent aqueous solution is recycled via electrolysis.
摘要:
A process for significantly decreasing the acid sludge settling time in waste oil recovery processes comprising the steps of heating used oil to a high temperature above 725 degrees Fahrenheit, cooling the heated oil, adding an oxidizing agent to the oil, allowing the acid sludge to settle within a period of approximately 24 to 72 hours, separating the acid-sludge-free oil from the acid sludge which settles out of solution as a result of addition of the oxidizing agent, and adding a polishing agent and separating the re-refined oil from the spent polishing agent. The spent polishing agent is recycled, and the acid sludge which settles out after oxidation is converted to either hard, oxidized asphalt or soft asphalt or asphalt products such as emulsions etc. The process produces a high quality re-refined oil rapidly and economically with no acid sludge disposal problem.