Axens

Houston, TX, United States
Houston, TX, United States
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The present invention describes a process for the isomerization of a light naphtha with a view to forming high octane number petrols, said process using a deisopentanizer and a deisohexanizer that are thermally integrated so as to reduce the high thermal level utilities consumption of the process.


The invention concerns a process for the production of middle distillates, comprising at least one step for the catalytic oligomerization of a feed comprising olefins containing 3 to 9 carbon atoms, in which the reaction section comprises at least two reactors which are positioned in series and which can be permutated, each containing at least one oligomerization catalyst for the oligomerization reactions, said catalysts being identical or different, and in which the reactor which is the furthest downstream in the direction of movement of said feed comprising olefins contains the catalyst with a period of service which is shorter than the period of service of the catalysts present in the other reactors and is operated at an average temperature (WABTn) which is lower than the average temperature (WABTn1) of the reactor directly preceding it, the difference between said average temperatures being at least 10 C. (WABTn1WABTn10 C.).


The invention concerns a facility and a process for hydrotreatment or hydroconversion, in which the fractionation section comprises a stripper which operates on the overhead fraction obtained from a low pressure separator drum.


The invention concerns an installation and a process which jointly implement compression of the acid gases from the hydroconversion or hydrotreatment unit and that of the gaseous effluents from the catalytic cracking unit.


The present invention describes a catalytic reactor operating in moving-bed mode that makes it possible to deal with interruptions in the flow of the catalyst while avoiding mechanically damaging the internals containing the catalyst. The invention also relates to a refining or petrochemical process using the reactor according to the invention.


The present invention describes a process for the production of high octane number gasoline by isomerization of a light naphtha cut, comprising two separation steps located downstream of the reaction step which can be used to improve the energy efficiency of said process.


The present invention describes a control system for units for the production of 1-butene by the oligomerization of ethylene in the presence of a homogeneous catalyst, in the liquid phase and at the bubble point, which uses a multivariable predictive controller and provides the units with better stability.


The invention relates to a process for oligomerising light olefins in which the effluent from the oligomerisation section is passed to a prefractionator that leads to at least one head fraction containing a mixture of liquefied petroleum gas and light gasoline and a bottom fraction containing a mixture of heavy gasoline and middle distillate, the said head fraction being passed to a debutaniser that leads to at least one liquefied petroleum gas cut and a light gasoline cut, the said bottom fraction and at least part of the said light gasoline cut being passed to a separator enabling at least a gaseous fraction, a gasoline fraction and a gasoil fraction to be obtained.


The invention relates to a method for the production of petrol with a high octane rating, by means of isomerisation of a light naphtha fraction, as well as comprising two separation steps performed downstream of the reaction step, which allow the energy efficiency of the method to be improved.


Patent
Axens | Date: 2017-04-12

The present invention relates to a process for desulfurizing a cracked naphtha containing organic sulfur compounds comprising the following steps :a) feeding the cracked naphtha to a distillation column comprising a bottom reboiler;b) fractionating said cracked naphtha into a light naphtha fraction and a heavy naphtha fraction which is removed as bottoms from the distillation column;c) feeding the heavy naphtha fraction and hydrogen to a hydrodesulfurization unit containing a hydrodesulfurization catalyst to produce a desulfurized heavy naphtha effluent. The process further comprises a step of providing heat to the distillation column by an intermediate reboiler powered with a heat source having a temperature lower than that one of the bottom reboiler.

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