Method for separating n-alkane from C5 to C6 alkane isomerized products

Active Publication Date: 2005-07-06
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0009] above by C 5 ~C 6 In the adsorption separation method for separating n-alkanes from alkane mixture, small molecular substances are used as desorbents, and when desorbing n-alkanes from the adsorbent, especially in liquid phase operation, the amount of desorbent is much larger than The n-paraffins adsorbed on the adsorbent, so that the energy consumption is huge when separating the desorbent from the desorbent liquid
In addition, as the number of carbon atoms in the raw material molecule increases, its adsorption force on the adsorbent increases. When small molecular substances are used as the desorbent, the time required for the desorption operation is longer, which reduces the efficiency of the adsorption separation device.

Method used

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  • Method for separating n-alkane from C5 to C6 alkane isomerized products
  • Method for separating n-alkane from C5 to C6 alkane isomerized products
  • Method for separating n-alkane from C5 to C6 alkane isomerized products

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example 1

[0030] Weigh 50 grams (dry basis) of 5A molecular sieve (Nanjing Jinling Catalyst Factory) as an adsorbent and pack it into a φ10×250mm stainless steel adsorption column, and put the C 5 、C 6 The alkane isomerization product undergoes distillation de-pentanization, C before and after de-pentanization 5 、C 6 The composition of alkane isomerization products is shown in Table 1. Under the condition of 3.0MPa, 150℃ and liquid phase, the C after deisopentanization 5 、C 6 Alkane isomerization products according to 1.0 -1 The volume space velocity is passed into the adsorption column for adsorption and separation operation. After the adsorption is saturated, add the flushing agent isopentane at 1.0 -1 The volume space velocity is passed into the adsorption column to replace the adsorption material in the invalid volume of the adsorption column. After washing, use n-octane as the desorbent to desorb the n-alkanes adsorbed in the pores of the adsorbent, and when the volume space...

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Abstract

Disclosed is a method for separating normal alkane from C5 to C6 alkane isomerized products. Isopentane is removed from raw materials, and the obtained materials are added into an adsorption separation post to adsorb normal alkane under 2.0-4.0 MPa, 100-150íµ and liquid phase condition, after saturation by adsorption, the adsorption separation post is flushed with flushing agent of isopentene, then desorbed by desorbing agent of C7 to C9 normal alkane. The method can separate normal alkane in light hydrocarbon isomerized products, and the used desorbing agent is less, the desorbing time is short.

Description

technical field [0001] The invention is a method for separating n-isoparaffins from alkane mixtures by means of adsorption separation, specifically, a method for separating normal isoparaffins from C 5 ~C 6 A method for separating normal paraffins from paraffin isomerization products. Background technique [0002] With the increasing awareness of environmental protection, the country has stricter requirements on vehicle fuels, especially gasoline products, and has imposed strict restrictions on olefins, aromatics and sulfur content in clean gasoline. due to C 5 ~C 6 The isomerization of alkanes can convert normal alkanes with low octane number into isoparaffins with high octane number, and the isomerization product is an environmentally friendly product with low sulfur, no aromatics and olefins, which can be used as Excellent gasoline blending components, increase the octane number of gasoline, and make gasoline have good antiknock performance. [0003] C 5 ~C 6 The a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/11
Inventor 姚志龙王建伟张宝贵钟进王志强张昕
Owner CHINA PETROLEUM & CHEM CORP
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