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Novel process flow diagram for the production of benzene from reformate without a toluene column

A xylene and material flow technology, applied in the petroleum industry, hydrocarbon oil treatment products, hydrocarbon oil treatment, etc., can solve problems such as stabilization towers not mentioned

Active Publication Date: 2019-01-22
INST FR DU PETROLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process flow diagram makes no mention of the stabilization columns present in the individual conversion units (isomerization, transalkylation, disproportionation, etc.)

Method used

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  • Novel process flow diagram for the production of benzene from reformate without a toluene column
  • Novel process flow diagram for the production of benzene from reformate without a toluene column
  • Novel process flow diagram for the production of benzene from reformate without a toluene column

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Embodiment Construction

[0050] The present invention relates to changing the process flow of an aromatic compound fractionation complex.

[0051] In the remainder of this text, the notation "A8+" will be used generally to denote all aromatic compounds containing 8 or more carbon atoms. In the same way, "A9+" means all aromatic compounds containing more than 9 carbon atoms, and so on. Hydrocarbon compounds that do not contain aromatic rings are called "aliphatic".

[0052] According to the reference process flow corresponding to the prior art (see figure 1 ), the toluene tower mainly plays the role of separating the A8+ produced from the transalkylation of toluene.

[0053] The present invention describes a fractionation process for an aromatics complex in which the fractionation point of the effluent fractionation column of the transalkylation unit is changed and the toluene column is omitted. A light aromatic fraction (denoted BT) consisting of a benzene / toluene fraction is withdrawn from the top...

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Abstract

The present invention describes a scheme for the production of benzene from a reformate, referred to as an aromatic complex, which does not comprise a toluene separation column. The scheme according to the invention allows a total energy gain of about 20% compared to the scheme of the prior art.

Description

Background of the invention [0001] The present invention relates to a process flow for fractionation in an aromatics complex. The aromatics complex is fed from a C6 to C10+ feed and includes a first step for the elimination of aliphatics, ie saturates of the paraffinic type. [0002] The second step is used to fractionate the aromatics species by carbon number using a series of 4 columns commonly referred to as benzene, toluene, xylene and heavy aromatics columns using The name of the product leaving the top of the column (except the heavies column). [0003] Reformate, any input produced from units located outside the aromatics complex and recycle streams produced from conversion units such as isomerization, transalkylation, disproportionation, etc., are at different heights depending on their composition Supply fractionation train series. [0004] The object of the present invention is to propose a process for fractionation in an aromatics complex excluding toluene column...

Claims

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Application Information

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IPC IPC(8): C07C7/04C07C5/27C07C6/12C07C15/04C07C15/08
CPCC07C5/27C07C6/126C07C7/005C07C7/04C07C15/08C07C15/04C07C6/123C07C7/10C07C15/06C07C4/12C07C6/00C07C5/22C10G7/08C10G2400/30
Inventor A.帕戈
Owner INST FR DU PETROLE
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