Abstract:
The present invention provides A process for preparing Fischer-Tropsch gasoil fraction, comprising: a) providing a Fischer-Tropsch-derived gasoil feedstock containing one or more contaminants; b) providing the Fischer-Tropsch-derived gasoil feedstock to a pretreatment zone to be pretreated to remove at least part of the one or more contaminants in the Fischer-Tropsch-derived gasoil feedstock; c) retrieving from the pretreatment zone a purified Fischer-Tropsch gasoil, which purified Fischer-Tropsch gasoil is contaminant-depleted with respect to the Fischer-Tropsch-derived gasoil feedstock; and d) providing the purified Fischer-Tropsch gasoil to fractionation zone and fractionating the purified Fischer-Tropsch gasoil into two or more high purity Fischer-Tropsch gasoil fractions. The invention further provides for the use of the purified Fischer-Tropsch gasoil fraction.
Abstract:
A process for treating a pitch fraction from coal tar is described. The pitch fraction is contacted with a solvent, an extraction agent, or an adsorbent to remove at least one contaminant, such as oxygenate compounds, nitrogen containing compounds, and sulfur containing compounds. The solvent can be an ionic liquid, the extraction agent can be at least one of amphiphilic block copolymers, cyclodextrins, functionalized cyclodextrins, and cyclodextrin-functionalized polymers, and the adsorbent can be exfoliated graphite oxide, thermally exfoliated graphite oxide or intercalated graphite compounds.
Abstract:
Systems, compositions, and methods for removing a substance or substances from a material, such as a gas or liquid material, are described. The compositions can comprise composite removal particles. In some embodiments, the composite removal particles can be comprised of support particles made from an inexpensive carrier material, and a reactive particle borne on the support particle. The reactive particle reacts with the substance or substances in the material. The reacted composite removal particles can then be removed from the material, which reduces the amount of the substance or substances present in the material. The composite removal particles are useful for removing pollutants, such as mercury, from exhaust gases, such as flue gas from a power plant combustion unit, and from other materials such as natural gas, liquefied natural gas, fuels, hydrocarbons, petrochemicals, and refinery streams.
Abstract:
A method for recovering synthetic oils from a feed stream, the method comprising separating at least a portion of the non- synthetic oil constituents from a commingled stream to produce a partially purified synthetic oil stream and one or more contaminant streams. Extracting at least a portion of the synthetic oil from the partially purified synthetic oil stream to produce a synthetic oil stream and a second contaminant stream.
Abstract:
Bei einem Verfahren zum Entfernen von Sauergasen aus Kohlenwasserstoffe enthaltenden Fluiden, trennt man (a) vom Fluid durch Wäsche mit einem flüssigen Absorptionsmittel einen Kohlendioxid-reichen Sauergasstrom ab, (b) bringt das Fluid mit einem festen Adsorptionsmittel zur Entfernung von schwefelhaltigen Sauergasen in Kontakt, und (c) regeneriert das beladene feste Adsorptionsmittel durch Kontakt mit wenigstens einem Spülgas unter Regenerationsbedingungen. Ein in Schritt (a) abgetrennter Kohlendioxid-reicher Sauergasstrom wird als Spülgas verwendet.
Abstract:
The present disclosure provides a method for isolation and purification of sodium sulfide (Na2S) formed during desulfurization of petroleum residue. The process involves treating a sludge containing Na2S obtained during desulfurization of petroleum residue with a mixture of at least one organic solvent and water.
Abstract:
A process for recovering ethylene is disclosed, the process including: recovering a ethylene-containing stream comprising methane, ethylene, and nitrogen oxides from at least one of an ethylene production process and an ethylene recovery process; separating the ethylene-containing stream via extractive distillation using at least one C2+ hydrocarbon absorbent to produce an overheads fraction comprising methane and nitrogen oxides and a bottoms fraction comprising the at least one C2+ hydrocarbon absorbent and ethylene; wherein the separating comprises operating the extractive distillation at temperatures and pressures sufficient to prevent any substantial conversion of nitrogen oxides to N203.
Abstract translation:公开了回收乙烯的方法,该方法包括:从乙烯生产方法和乙烯回收方法中的至少一种回收包含甲烷,乙烯和氮氧化物的含乙烯料流; 通过萃取蒸馏使用至少一种C2 +烃吸收剂分离含乙烯流,以产生包含甲烷和氮氧化物的塔顶馏分和包含至少一种C 2 +烃吸收剂和乙烯的塔底馏分; 其中所述分离包括在足以防止氮氧化物大量转化为N 2 O 3的温度和压力下进行萃取蒸馏。
Abstract:
Methods and apparatus relate to treatment of fluids to remove mercury contaminants in the fluid. Contact of the fluid with an amine that has absorbed a sulfur compound causes the mercury contaminants to be absorbed by the amine. Phase separation then removes from the fluid the amine loaded with the mercury contaminants such that a treated product remains.
Abstract:
A process is disclosed for enhanced recovery of propylene and LPG from the fuel gas produced in Fluid catalytic cracking unit by contacting a heavier hydrocarbon feed with FCC catalyst. In the conventional process, the product mixture from FCC main column overhead comprising naphtha, LPG and fuel gas, are first condensed and gravity separated to produce unstabilized naphtha, which is subsequently used in the absorber to absorb propylene and LPG from fuel gas. However, the recovery of propylene beyond 97 wt% is difficult in this process since unstabilized naphtha already contains propylene of 5 mol% or above. In the present invention, C4 and lighter components from unstabilized naphtha are first stripped off in a separate column to obtain a liquid fraction almost free from propylene (