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Adsorption and separation method of C5 and C6 isomerization product

A technology of adsorption separation and isomerization, which is used in adsorption purification/separation, isomerization hydrocarbon production, organic chemistry, etc., to achieve the effect of reducing dosage and energy consumption

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
  • Application Information

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  • Adsorption and separation method of C5 and C6 isomerization product
  • Adsorption and separation method of C5 and C6 isomerization product
  • Adsorption and separation method of C5 and C6 isomerization product

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example 1

[0032] Mix ZSM-5 molecular sieve with a silica / alumina molar ratio of 25 and kaolin at a mass ratio of 90:10, roll into a ball, bake at 500°C for 4 hours, and sieve particles with a particle size of 0.3 to 0.8 mm to obtain adsorption Agent A. Pack the adsorbent A in an adsorption column with a height of 1500 mm and an inner diameter of 40 mm, and the packing mass of the adsorbent is 1413 g.

[0033] with C 5 、C 6 The alkane isomerization product is used as the adsorption raw material for adsorption separation. The raw material A whose composition is shown in Table 1 was preheated at 170°C and passed into the adsorption column from top to bottom under gas phase conditions. The pressure of the adsorption column was kept at 0.9MPa, and the temperature of the adsorption column was 170°C for adsorption and separation operation. The adsorption feed was 110 g. After the adsorption column flows out of n-pentane, n-hexane and monomethylpentane, the adsorption separation is complete...

example 2

[0035] Adsorbent A was packed in an adsorption column with a height of 1500 mm and an inner diameter of 40 mm. A total of 3 adsorption columns were filled and connected in series in sequence. The mass of adsorbent in each adsorption column was 1405 g, 1410 g, and 1413 g, respectively. Control the temperature of the adsorption column to 170°C. The raw material A preheated to 170°C is passed into the first adsorption column from top to bottom in the gas phase, and the output at the bottom enters the top of the second adsorption column, and the output at the bottom of the second adsorption column is the product of the adsorption process. The pressure of the adsorption column is 0.8MPa. After feeding 195g to the first adsorption column, feed from the top of the second adsorption column instead, and the output from the bottom of the second adsorption column enters the top of the third adsorption column, and the output from the bottom of the third adsorption column is used as the pr...

example 3

[0037] According to the method of Example 1, the adsorption material B is adsorbed and separated, and its composition is shown in Table 1. The difference is that the temperature of the adsorption column is controlled to be 130 ° C, the pressure of the adsorption column is 0.4 MPa, and after the adsorption feed is 115 g, the pressure of the adsorption column is reduced to 0.1 MPa. , modified n-heptane for desorption, the flow rate of adsorption feed and desorbent is 5g / min. 46 g of n-heptane was introduced, and the adsorption material B was introduced again, and adsorption and desorption were carried out under the aforementioned adsorption conditions. Repeated adsorption-desorption operation, adsorption separation operating conditions and adsorption methods are shown in Table 2, and the contents of each component in the output (R) of the adsorption stage and the output (E) of the desorption stage are shown in Table 3.

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Abstract

An adsorption and separation method of C5 and C6 isomerization products. C5 and C6 isomerization products are adsorbed and separated into a first line of material, which is rich in pentane, hexane and single methylpentane and adsorbed by the adsorbent, and a second line of material, which is high octane number gasoline blending component rich in isopentane and dimethyl butane and not adsorbed by the adsorbent. The first line of material is desorbed by a desorption agent; separated desorption agent can be reused; and the desorption agent is C7-C10 normal paraffin. An adsorption pressure is controlled to be higher than a desorption pressure during the adsorption and separation process. The method can produce high octane component, while reducing a usage amount of the desorption agent.

Description

technical field [0001] The present invention is a kind of adsorption separation method of isomerization product, specifically, it is a kind of 5 、C 6 A method for producing high-octane gasoline blending components through adsorption separation of isomerization products. Background technique [0002] Octane number is one of the key indicators to evaluate the quality of gasoline, C 5 、C 6 Alkane isomerization is an important means to improve the quality of gasoline and plays an important role in the production of clean gasoline. It improves the front-end octane number of gasoline by converting normal paraffins with low octane number in raw materials into isoparaffins with high octane number, so that gasoline has good antiknock performance. And the isomerization product is a low-sulfur, non-aromatic and olefin-free environment-friendly gasoline blending component. [0003] The isomerization reaction of alkanes is limited by the thermodynamic equilibrium. There are still no...

Claims

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Application Information

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IPC IPC(8): C07C7/12C07C9/18C07C9/16C07C7/13C07C5/22
Inventor 王德华王辉国马剑锋郁灼王志光杨会荣
Owner CHINA PETROLEUM & CHEM CORP
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