Abstract: A naphtha hydrotreating process involves the use of a sulfur guard bed (SGB) with a controlled bypass which allows for control of the sulfur in the feed to a downstream processing unit. The SGB is installed on the light ends stripper bottoms stream in a naphtha hydrotreating unit.

Abstract: A naphtha hydrotreating process is described. It involves the use of a sulfur guard bed (SGB) with a controlled bypass which allows for control of the sulfur in the feed to a downstream processing unit. The SGB is installed on the light ends stripper bottoms stream in a naphtha hydrotreating unit.

Abstract: An improved isomerization process in which the inlet temperature to the isomerization reaction zone is less than 105° C. is described. A separate reactor is provided for the decomposition of the organic chloride. The product of the decomposition of the organic chloride is sent to an isomerization reactor along with a hydrocarbon feed containing paraffins. The use of the organic chloride decomposition reactor allows the operating temperatures for the isomerization reaction zone to be reduced.

Abstract: An improved isomerization process in which the inlet temperature to the isomerization reaction zone is less than 105° C. is described. A separate reactor is provided for the decomposition of the organic chloride. The product of the decomposition of the organic chloride is sent to an isomerization reactor along with a hydrocarbon feed containing paraffins. The use of the organic chloride decomposition reactor allows the operating temperatures for the isomerization reaction zone to be reduced.

Abstract: The present subject matter relates generally to methods for treating an organic feed. More specifically, the present subject matter relates to methods for reducing the water content of an organic feed before the organic feed enters a hydrogenation zone, thereby by improving the activity, conversion, and life of the hydrogenation catalyst. The hydrogenation zone product stream is then sent to a phenol recovery zone.

Abstract: The present subject matter relates to methods and apparatuses for the continuous preparation of a cumene feed for a cumene oxidation process. More specifically, the subject matter relates to a process for passing a cumene alpha-methylstyrene stream through a caustic wash column having an integrated water wash section for the removal of organic acids.

Abstract: The present subject matter relates to methods and apparatuses for the continuous preparation of a cumene feed for a cumene oxidation process. More specifically, the subject matter relates to a process for passing a cumene alpha-methylstyrene stream through a caustic wash column having an integrated water wash section for the removal of organic acids.

Abstract: The present subject matter relates to methods and apparatuses for the continuous preparation of a cumene feed for a cumene oxidation process. More specifically, the subject matter relates to a process for passing a cumene alpha-methylstyrene stream through a caustic wash column having an integrated water wash section for the removal of organic acids.

Abstract: Byproduct formation in aromatic alkylation processes is reduced when different polyalkylated aromatic compounds are first fractionated into separate streams enriched in these respective polyalkylated aromatic compounds, and the separate streams are sent to different transalkylation reaction zones, which may or may not be in the same reactor. The different transalkylation reaction zones allow for greater control of the transalkylation of the respective polyalkylated aromatic compounds, such as diisopropylbenzene (DIPB) and triisopropylbenzene (TIPB) that accompany the alkylation of benzene with propylene in a process for cumene production.

Abstract: Methods and apparatuses are disclosed for the continuous treatment of gas streams contaminated with one or more acid gases, for example HCl, H2S, SO2, SO3, and/or Cl2. At least primary and secondary neutralization zones are utilized, with the secondary neutralization zone being fed by a portion of the gas stream that is used to carry out essentially complete neutralization of a neutralization solution, such as aqueous sodium hydroxide, prior to its disposal (e.g., via biological treatment). The flow of this portion of the gas stream may be regulated by periodically or continuously monitoring the concentration or pH of the spent neutralization solution exiting the secondary neutralization zone. Suitable gas streams that can be treated include effluent gases comprising hydrogen chloride from hydrocarbon conversion processes, particularly paraffin isomerization processes, utilizing a chloriding agent as a catalyst promoter.

Abstract: Byproduct formation in aromatic alkylation processes is reduced when different polyalkylated aromatic compounds are first fractionated into separate streams enriched in these respective polyalkylated aromatic compounds, and the separate streams are sent to different transalkylation reaction zones, which may or may not be in the same reactor. The different transalkylation reaction zones allow for greater control of the transalkylation of the respective polyalkylated aromatic compounds, such as diisopropylbenzene (DIPB) and triisopropylbenzene (TIPB) that accompany the alkylation of benzene with propylene in a process for cumene production.

Abstract: An apparatus comprising a processing unit; a feed conduit and an effluent conduit connected to the processing unit; at least one operating parameter device associated with the processing unit, the feed conduit, the effluent conduit or a combination thereof; a catalytic alloy hydrogen sensor in fluid communication with the processing unit, the feed conduit, the effluent conduit or a combination thereof; and a computer processor electrically connected to the catalytic alloy hydrogen sensor, has been developed. A pressure indicator may be positioned to indicate the pressure of fluid passing through the catalytic alloy hydrogen sensor and there may be an electrical connection between the computer processor and the pressure indicator. The catalytic alloy hydrogen sensor may be a palladium-nickel catalytic alloy hydrogen sensor.

Abstract: An apparatus comprising a processing unit; a feed conduit and an effluent conduit connected to the processing unit; at least one operating parameter device associated with the processing unit, the feed conduit, the effluent conduit or a combination thereof; a catalytic alloy hydrogen sensor in fluid communication with the processing unit, the feed conduit, the effluent conduit or a combination thereof; and a computer processor electrically connected to the catalytic alloy hydrogen sensor, has been developed. A pressure indicator may be positioned to indicate the pressure of fluid passing through the catalytic alloy hydrogen sensor and there may be an electrical connection between the computer processor and the pressure indicator. The catalytic alloy hydrogen sensor may be a palladium-nickel catalytic alloy hydrogen sensor.

Abstract: A process for controlling a refinery or chemical process has been developed. The process comprises flowing a feed stream to a process unit; operating on the feed stream in the process unit to generate an effluent stream; flowing the effluent stream away from the process unit; passing at least a portion of the feed stream or the effluent stream through a catalytic alloy hydrogen sensor and generating a signal corresponding to the concentration of hydrogen present in either the feed stream or the effluent stream; passing the signal to a display unit; and adjusting at least one operating parameter of the process in response to at least the signal generated by the catalytic alloy hydrogen sensor. The catalytic alloy hydrogen sensor may be a palladium-nickel catalytic alloy hydrogen sensor. The adjustments may be based on a calculated mole percent hydrogen.

Abstract: A process for controlling a refinery or chemical process has been developed. The process comprises flowing a feed stream to a process unit; operating on the feed stream in the process unit to generate an effluent stream; flowing the effluent stream away from the process unit; passing at least a portion of the feed stream or the effluent stream through a catalytic alloy hydrogen sensor and generating a signal corresponding to the concentration of hydrogen present in either the feed stream or the effluent stream; passing the signal to a display unit; and adjusting at least one operating parameter of the process in response to at least the signal generated by the catalytic alloy hydrogen sensor. The catalytic alloy hydrogen sensor may be a palladium-nickel catalytic alloy hydrogen sensor. The adjustments may be based on a calculated mole percent hydrogen.

Abstract: A process for sensing hydrogen in a refinery process stream or a chemical process stream has been developed. The process comprises flowing at least a portion of the refinery process stream or the chemical process stream through a conduit which is part of a main support and through a series of flow components which are attached to the main support and in fluid communication with the conduit. The flow components comprise, a needle valve, a pressure indicator, a catalytic alloy hydrogen sensor, and a back pressure regulator. The catalytic alloy hydrogen sensor may be a palladium-nickel catalytic alloy hydrogen sensor. The process continues with generating a signal indicating the amount of hydrogen in the stream using the catalytic alloy hydrogen sensor and communicating the signal to a display device or a computer processor. The process may further include adjusting an operating parameter based upon the signal indicating the amount of hydrogen in the stream, or based upon a calculated mole percent hydrogen.

Abstract: A modular assembly for sensing hydrogen in a refinery process stream or a chemical process stream has been developed. The assembly comprises a main support having a flow conduit with flow components attached to the main support and interacting with the flow conduit. The flow components comprise a needle valve, a pressure indicator, a catalytic alloy hydrogen sensor, and a back pressure regulator. There is an electrical connection between the catalytic alloy hydrogen sensor flow component and a display device or computer processor. Additional optional flow components include a filter, a check valve, and a thermocouple. There may be an electrical connection between the pressure indicator and the display device or computer processor. The assembly may be used for controlling a process operating parameter with an electrical connection between the computer processor and an operating parameter device.

Abstract: A process for controlling a refinery or chemical process has been developed. The process comprises flowing a feed stream to a process unit; operating on the feed stream in the process unit to generate an effluent stream; flowing the effluent stream away from the process unit; passing at least a portion of the feed stream or the effluent stream through a catalytic alloy hydrogen sensor and generating a signal corresponding to the concentration of hydrogen present in either the feed stream or the effluent stream; passing the signal to a display unit; and adjusting at least one operating parameter of the process in response to at least the signal generated by the catalytic alloy hydrogen sensor. The display unit may be part of a computer and the adjusting of at least one operating parameter may be performed automatically using the computer. The catalytic alloy hydrogen sensor may be a palladium-nickel catalytic alloy hydrogen sensor. The adjustments may be based on a calculated mole percent hydrogen.

Abstract: An apparatus comprising a processing unit; a feed conduit and an effluent conduit connected to the processing unit; at least one operating parameter device associated with the processing unit, the feed conduit, the effluent conduit or a combination thereof; a catalytic alloy hydrogen sensor in fluid communication with the processing unit, the feed conduit, the effluent conduit or a combination thereof; and a computer processor electrically connected to the catalytic alloy hydrogen sensor, has been developed. The apparatus may also have at least one operating parameter device and an electrical connection between the computer processor and at least one of the operating parameter devices. The apparatus may be used for the control of a processing unit or operation. A pressure indicator may be positioned to indicate the pressure of fluid passing through the catalytic alloy hydrogen sensor and there may be an electrical connection between the computer processor and the pressure indicator.

Abstract: A process for decomposing a cumene oxidation product mixture containing cumene hydroperoxide (CHP) and dimethylphenolcarbinol (DMPC) to produce phenol and acetone.