Abstract:
A method for selecting a solvent or mixture of solvents useful for mitigating deposit formation, cleaning existing deposits, and/or decreasing the rate of deposit formation is disclosed. Decreasing the rate at which deposits may form and/or increasing the rate at which deposits may be removed can dramatically improve process economics (e.g., decreasing down time as a result of deposit formation). In one aspect, embodiments disclosed herein relate to a process for dispersing foulants in a hydrocarbon stream, including the steps of: determining a nature of foulants in a hydrocarbon stream; selecting a solvent or a mixture of solvents suitable to disperse the foulants based upon the determined nature; and contacting the foulants with the selected solvent or mixture of solvents.
Abstract:
Processes for production of olefins from hydrocarbon feedstocks are provided. In one aspect, the processes of the present invention utilize coils passing through a pyrolysis furnace to partially convert a hydrocarbon feedstock to olefins, followed by further conversion of the hydrocarbon feedstock in an adiabatic reactor. A portion of the coils in the pyrolysis furnace carry the hydrocarbon feedstock and the remainder carry steam only. After a selected period of time, the material flowing through the coils is switched. By flowing steam through the coils that had previously contained the hydrocarbon feedstock, on-line decoking can occur. In another aspect, a high temperature reactor is used to convert methane or natural gas to olefins.
Abstract:
Randomly packing with filler material at least part of a pass in a coil used in a system for pyrolyzing hydrocarbon feedstock to lighter hydrocarbons. Randomly packing increases heat transfer and decreases the rate of coke build-up within the coil, yielding an improvement in overall system efficiency. Packing material can comprise or be treated with a suitable catalyst for increasing the rate of chemical decomposition, thus further improving system efficiency.
Abstract:
Embodiments disclosed herein relate to systems and processes for producing olefins and/or dienes. The processes may include: thermally cracking a hydrocarbon containing feed to produce a cracked hydrocarbon effluent containing a mixture of olefins and paraffins; and catalytically cracking the cracked hydrocarbon effluent to produce a catalytically cracked effluent containing additional olefins and/or dienes. The systems may include a reaction zone for thermally cracking a hydrocarbon containing feed to produce a cracked hydrocarbon effluent containing a mixture of olefins and paraffins; and, a catalytic cracking reaction zone for catalytically cracking the cracked hydrocarbon effluent to produce a catalytically cracked hydrocarbon effluent containing additional olefins and/or dienes.
Abstract:
redução de depósito em fracionamento de gasolina, sistema de água de refrigeração e seção de recuperação do produto. um método para a seleção de um solvente ou mistura de solventes úteis para atenuar a formação de depósitos, limpar os depósitos já existentes, e/ou diminuir a taxa de formação de depósitos é divulgado. diminuir a taxa na qual os depósitos podem formar e/ou aumentar a taxa na qual os depósitos podem ser removidos pode melhorar dramaticamente a economia do processo (por exemplo, diminuir o tempo como resultado da formação de depósito). em um aspecto, as modalidades aqui reveladas dizem respeito a um processo para dispersar incrustações em uma corrente de hidrocarboneto, incluindo as etapas de: determinação de uma natureza de incrustações em uma corrente de hidrocarboneto; seleção de um solvente ou uma mistura de solventes adequados para dispersar as incrustações com base na natureza determinada, e contatar as incrustações com o solvente ou mistura de solventes selecionados.
Abstract:
Processes for production of olefins from hydrocarbon feedstocks are provided. In one aspect, the processes of the present invention utilize coils passing through a pyrolysis furnace to partially convert a hydrocarbon feedstock to olefins, followed by further conversion of the hydrocarbon feedstock in an adiabatic reactor. A portion of the coils in the pyrolysis furnace carry the hydrocarbon feedstock and the remainder carry steam only. After a selected period of time, the material flowing through the coils is switched. By flowing steam through the coils that had previously contained the hydrocarbon feedstock, on-line decoking can occur. In another aspect, a high temperature reactor is used to convert methane or natural gas to olefins.
Abstract:
A method for selecting a solvent or mixture of solvents useful for mitigating deposit formation, cleaning existing deposits, and/or decreasing the rate of deposit formation is disclosed. Decreasing the rate at which deposits may form and/or increasing the rate at which deposits may be removed can dramatically improve process economics (e.g., decreasing down time as a result of deposit formation). In one aspect, embodiments disclosed herein relate to a process for dispersing foulants in a hydrocarbon stream, including the steps of: determining a nature of foulants in a hydrocarbon stream; selecting a solvent or a mixture of solvents suitable to disperse the foulants based upon the determined nature; and contacting the foulants with the selected solvent or mixture of solvents.
Abstract:
Procesos para la produccion de olefinas a partir de materias primas de hidrocarburos. En un aspecto, los procesos de la presente solicitud utilizan serpentines que pasan a través de un horno de pirolisis para convertir parcialmente una materia prima de hidrocarburo en olefinas seguido por la conversion adicional de la materia prima de hidrocarburo en un reactor adiabático. Una porcion de los serpentines en el horno de pirolisis traslada la materia prima de hidrocarburo y el resto traslada unicamente vapor. Después de un período de tiempo escogido, se intercambia el material que fluye a través de los serpentines. Al fluir vapor a través de los serpentines que previamente contenían la materia prima de hidrocarburo puede ocurrir la descoquizacion en línea. En otro aspecto, se usa un reactor de alta temperatura para convertir metano o gas natural en olefinas.
Abstract:
Randomly packing with filler material at least part of a pass in a coil used in a system for pyrolyzing hydrocarbon feedstock to lighter hydrocarbons. Randomly packing increases heat transfer and decreases the rate of coke build-up within the coil, yielding an improvement in overall system efficiency. Packing material can comprise or be treated with a suitable catalyst for increasing the rate of chemical decomposition, thus further improving system efficiency.