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Method of separating linear alpha olefins

A technology of alpha olefin and direct method, applied in the field of separation of linear alpha olefin, can solve the problem of energy consumption of direct sequence

Inactive Publication Date: 2019-08-02
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, direct sequence consumes undesirably large amounts of energy, for example, each column may require high reboiler duty and high condenser duty

Method used

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  • Method of separating linear alpha olefins
  • Method of separating linear alpha olefins
  • Method of separating linear alpha olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] For the purposes of this example, an unmodified direct distillation sequence was simulated. The C8 and C10 fractions are separated from the linear alpha olefin stream using a direct sequence of two series-connected distillation columns, with the lightest components being withdrawn as overhead from each column. The bottom fraction taken from the bottom part of the first column is further separated into two fractions. The results are given in Table 1. The total reboiler duty is calculated as the sum of the reboiler duty of the two distillation columns. The total condenser duty is the sum of the condenser duties of the two columns.

Embodiment 2

[0048] For the purposes of this example, a modified distillation sequence according to the methods disclosed herein was simulated. The C8 and C10 fractions are separated from the linear alpha olefin stream using a modified indirect sequence of two distillation columns in series as depicted in Figure 1, with the heaviest components being withdrawn from each column as bottoms. The top fraction taken from the top section of the first column is further separated into two fractions. The results are given in Table 1. The total reboiler duty is calculated as the sum of the reboiler duty of the two distillation columns. The total condenser duty is the sum of the condenser duties of the two columns.

[0049]

[0050]

[0051] It can be seen from Table 1 that, as depicted in FIG. 1 , the method of the present invention (Example 2) achieves an energy reduction greater than or equal to 20% compared to the unmodified sequence of Example 1. Both total condenser duty (20.5% reductio...

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PUM

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Abstract

A method of separating linear alpha olefins includes: passing a feed stream comprising linear alpha olefins through a first column; distributing a C10- fraction to a top portion of the first column; distributing a C12+ fraction to a bottom portion of the first column; withdrawing the C10- fraction from the top portion of the first column; passing the C10- fraction through a second column; distributing a C8 fraction to a top portion of the second column; and distributing a C10 fraction to a bottom portion of the second column; wherein any fraction withdrawn from the top portion of the first column is further separated into greater than or equal to two fractions.

Description

Background technique [0001] Linear olefins are one of the most useful classes of hydrocarbons as feedstocks in the petrochemical industry. Among these linear α-olefins, unbranched olefins in which the double bond is located at the end of the chain form an important subclass. Linear alpha olefins can be converted to linear primary alcohols by hydroformylation. Hydroformylation can also be used to produce aldehydes as major products, which in turn can be oxidized to yield synthetic fatty acids, especially those with odd number of carbons, used to produce lubricants. Linear alpha olefins are also used in the most important class of household detergents, the linear alkylbenzene sulfonates, which are prepared by Friedel-Crafts reaction of benzene with linear olefins followed by sulfonation. [0002] Although linear olefins are the dehydrogenation products of linear alkanes, the major part of this product consists of internal olefins. The production of alpha olefins is largely ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/00C07C7/04C07C7/08C07C11/02
CPCB01D3/00C07C7/04C07C7/08C07C11/02B01D3/143B01D3/322
Inventor 哈立德·穆罕默德·艾尔哈兹米贾甘·拉拉帕利
Owner SABIC GLOBAL TECH BV