In accordance with the present invention, disclosed herein is a method comprising the steps for separating syngas and methane from C2-C4 hydrocarbons. Also disclosed herein, are systems utilized to separate syngas and methane from C2-C4 hydrocarbons.

The present subject matter relates generally to processes for propylene recovery. More specifically, the present subject matter relates to processes for enhanced recovery of propylene and liquid petroleum gas (LPG) from the fuel gas produced in fluid catalytic cracking (FCC) units by minimizing the light ends and propylene in the unstabilized gasoline which is used as lean oil for the primary absorber of the FCC gas concentration unit.

A process for the purification of a gas rich in hydrocarbons and comprising at least 10 ppm by volume of hydrocarbons having at least six carbon atoms nitrogen.

A process for extracting a condensable vapour from a supplied gas, comprising the steps of: i) condensing the condensable vapour by cooling the supplied gas at a condensing surface, such that the supplied gas is divided into at least one condensed fraction and a product gas; while ii) removing the at least one condensed fraction from the condensing surface by mechanical scraping means.

The presently disclosed concepts relate to systems and methods for effluent stream abatement via pyrolytic emission looping. In use, the systems and methods include a feed gas stream, and at least one dissociating reactor that receives the feed gas stream. The at least one dissociating reactor outputs, at least in part, a carbon allotrope material and a discharge pyrolytic emissions stream. Additionally, a gas separating system is used to separate the discharge pyrolytic emissions stream into at least one species component, where the at least one species component is added to at least the feed gas stream.

An apparatus for processing liquid from a quench water tower includes a first pipe for removing the liquid from the quench water tower; a hydrocyclone in fluid communication with the first pipe and in which the liquid is separated into particulate and liquid constituents by centrifugal force; and an oil-water separator downstream of and in fluid communication with a first outlet of the hydrocyclone. A related system and method are also provided.

A system and method for distillation of a liquid sample at atmospheric pressure for the improved prediction of the heating necessary before the initial boiling point (IBP) of the sample is detected regardless of sample composition to ensure the IBP is observed within certain time constraints. A plurality of infrared (IR) sensors provides real-time temperature control in addition to a conventional measurement of vapor temperature. One IR-sensor monitors the liquid sample temperature in the distillation flask to obtain a corrected IBP time independent of the sample properties. Another IR-sensor monitors the temperature of the rising vapor column as the vapor rises up the neck of the distillation flask. Alternatively, an IR matrix may monitor the temperature of the rising vapor column. The system and method expand the scope of samples analyzed with improved signal, reproducibility, and test accuracy and still remain within the prescribed limits of a selected standard.

Fractionation, the process used by refineries to break down carbon chains of petroleum compounds so that the desired carbon compound can be achieved. This process typically involves high heat, distillation, re-boiling, and energy intensive cooling processes. This application discloses an invention that will condense vapor produced by a pyrolysis reactor. This system uses one standard cyclone; three cascading cyclones with internal cyclonic rotation fins that force incoming vapor to maintain a fixed amount of rotation regardless of the vapor's velocity, heat sinks that increase condensation, reversing fins that force gases to reverse direction inside the cyclone decreasing vapor velocity to increase heat loss; a main collection tank that allows for the controlling of the fuel flash point; a compact low temperature coil cooler that uses 100 percent of the cooling surface that allows for the production of higher quality fuel; and, bubblers/scrubbers that produce back pressure into the pyrolysis reactor.

Methods and systems for treating a compressed gas stream. The compressed gas stream is cooled and liquids are removed therefrom to form a dry gas stream, which is chilled in a first heat exchanger. Liquids are separated therefrom, thereby producing a cold vapor stream and a liquids stream. A first part of the cold vapor stream is expanded to produce a cold two-phase fluid stream, and a second part of the cold vapor stream is cooled to form a cooled reflux stream. Various streams are fed into a separation column to produce a cold fuel gas stream and a low temperature liquids stream. The second part of the cold vapor stream is cooled by the cold fuel gas stream, which becomes a warmed fuel gas stream that is compressed and used with the low-temperature liquids stream to chill the dry gas stream and to cool the compressed gas stream.

The present invention relates to a novel process of an absorption and stabilization unit, comprising operation steps of: sS1, primary compression of rich gas, S2, secondary compression of rich gas, S3, dry gas absorption, S4, gasoline stabilization, and so on. After rich gas from a catalytic fractionation unit undergoes operations such as primary compression, rectification using a de-heavy fractionator, and secondary compression, the gas phase mainly composed of C3 from the top of the de-heavy fractionator and naphtha from the catalytic fractionation unit are absorbed in an absorption tower, and dry gas of unabsorbed components is discharged from the top of the absorption tower; rich-absorption oil from the bottom of the absorption tower and the liquid phase mainly composed of C4 from the bottom of the de-heavy fractionator enter an stabilization tower to perform stable operation. The novel process of the absorption and stabilization unit of the present invention can obviously reduce the energy consumed by the absorption and stabilization unit by means of step-by-step compression, and facilitates further utilization of products from the absorption and stabilization unit. The present invention also relates to a method for comprehensive utilization of products from the absorption and stabilization unit, for maximizing the conversion of effective components in stabilized gasoline, liquefied gas, and dry gas after the novel absorption and stabilization process into high value-added chemical products such as propylene.