An in-line L-Grade recovery system having a first in-line separator in communication with a natural gas stream and configured to separate the natural gas stream into a gas stream and a liquid stream, a second in-line separator in communication with the first in-line separator and configured to separate the liquid stream into L-Grade and water, and a storage tank in communication with the second in-line separator and configured to store the L-Grade.

Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems are described that can use feedstock materials, such as cellulosic and/or lignocellulosic materials and/or starchy materials, to produce ethanol and/or butanol, e.g., by fermentation. Hydrocarbon-containing materials are also used as feedstocks.

A method of obtaining a liquefied hydrocarbon-rich fraction (product fraction) having a nitrogen content of 1 mol %, wherein the hydrocarbon-rich fraction is liquefied and subcooled with a refrigeration circuit and then subjected to a rectificative removal of nitrogen is disclosed.

Processes and systems for stabilizing a condensate feed and mitigating fouling include providing a raw condensate, having greater than 2000 ppmv free and emulsified water, to a stabilizer feed drum. The free and emulsified water has greater than 40000 ppm salt. The stabilizer feed drum comprises a liquid-liquid separation parallel plate pack internals to separate the raw condensate into a water phase and an oil phase. The resulting oil phase comprises less than 500 ppmv free and emulsified water and is fed to a stabilizer system including a stabilizer column and one or more reboilers. In the stabilizer system, the oil phase is separated into a vapor and a stabilized condensate. The process includes operating the stabilizer column at an overhead pressure greater than 12 barg and a bottoms temperature greater than 135 C. The stabilized condensate has a true vapor pressure (TVP) of less than 3.8 barg.

Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems are described that can use feedstock materials, such as cellulosic and/or lignocellulosic materials and/or starchy materials, to produce ethanol and/or butanol, e.g., by fermentation. Hydrocarbon-containing materials are also used as feedstocks.

Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful products, such as fuels. For example, systems are described that can use feedstock materials, such as cellulosic and/or lignocellulosic materials and/or starchy materials, to produce ethanol and/or butanol, e.g., by fermentation. Hydrocarbon-containing materials are also used as feedstocks.

The present application relates to a method and a device system for producing feed stock of ethylene steam cracker and a nano-carbon material from waste plastics, and the method comprises: firstly, subjecting a waste plastic to thermal pyrolysis to obtain hydrocarbon oil and gas from thermal pyrolysis; then, subjecting the hydrocarbon oil and gas from thermal pyrolysis to gas-liquid separation to obtain crude plastic pyrolysis oil and pyrolysis gas; subsequently, subjecting the pyrolysis gas to decarbonization to obtain a nano-carbon material, and sequentially subjecting the crude plastic pyrolysis oil to hydrocracking and fractionating to obtain the feed stock of ethylene steam cracker. The device system comprises a thermal pyrolysis unit, a gas-liquid separation unit, a hydrocracking unit, a fractionating unit, and a decarbonization unit. The method and device system provided in the present application can prepare the steam-cracking feedstock of ethylene steam cracker with a high proportion of chain alkanes, which can achieve a higher yield of target products when used to produce downstream products, and the production process has no carbon dioxide emission, and is green and clean. The device system provided in the present application has a simple structure and can be used in industrial application.

The present application relates to a method and a device system for producing feed stock of ethylene steam cracker and a nano-carbon material from waste plastics, and the method comprises: firstly, subjecting a waste plastic to thermal pyrolysis to obtain hydrocarbon oil and gas from thermal pyrolysis; then, subjecting the hydrocarbon oil and gas from thermal pyrolysis to gas-liquid separation to obtain crude plastic pyrolysis oil and pyrolysis gas; subsequently, subjecting the pyrolysis gas to decarbonization to obtain a nano-carbon material, and sequentially subjecting the crude plastic pyrolysis oil to hydrocracking and fractionating to obtain the feed stock of ethylene steam cracker. The device system comprises a thermal pyrolysis unit, a gas-liquid separation unit, a hydrocracking unit, a fractionating unit, and a decarbonization unit. The method and device system provided in the present application can prepare the steam-cracking feedstock of ethylene steam cracker with a high proportion of chain alkanes, which can achieve a higher yield of target products when used to produce downstream products, and the production process has no carbon dioxide emission, and is green and clean. The device system provided in the present application has a simple structure and can be used in industrial application.

The present invention concerns a process for the treatment of a hydrocarbon feed containing hydrogen and hydrocarbons including C.sub.1 to C.sub.4 hydrocarbons. The process employs two steps for recontacting gaseous and liquid phases and in which at least one of the recontacting steps is carried out in a column (30, 40) in which the gaseous and liquid streams are brought into counter-current contact.

The present invention concerns a process for the treatment of a hydrocarbon feed containing hydrogen and hydrocarbons including C.sub.1 to C.sub.4 hydrocarbons. The process employs two steps for recontacting gaseous and liquid phases and in which at least one of the recontacting steps is carried out in a column (30, 40) in which the gaseous and liquid streams are brought into counter-current contact.