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Adsorption purification method for hydrocarbon stream

A technology for purifying hydrocarbons and hydrocarbon streams, used in adsorption purification/separation, chemical instruments and methods, silicon compounds, etc. The effect of adsorption capacity

Active Publication Date: 2010-11-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the prior art, the adsorption capacity of the adsorbent is low and the regeneration temperature is relatively high.

Method used

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  • Adsorption purification method for hydrocarbon stream
  • Adsorption purification method for hydrocarbon stream
  • Adsorption purification method for hydrocarbon stream

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Contains NaY molecular sieve and CaCl 2 The preparation process of the solid adsorbent is as follows. Using alumina as the binder, according to the mass ratio of NaY molecular sieve to alumina 1:4, add a small amount of sesame powder to mix well, and then add a certain concentration of dilute nitric acid to extrude. Dry naturally, and roast in the air at 500°C for 2 hours. Grind 10-20 meshes, and dry at 400°C until the mass is no longer reduced to obtain shaped solid adsorbent precursor I, which is transferred to a desiccator for use. Prepare CaCl with a mass concentration of 10% 2 Solution I. The solid adsorbent precursor I was immersed in the above-mentioned solution I. After full immersion, filter out CaCl 2 Solution, use deionized water to wash away the remaining CaCl on the surface 2 , Get solid adsorbent II. After drying, the solid adsorbent II prepared above is dried in the air at 400° C. in a muffle furnace until the mass is no longer reduced to obtain a shape...

Embodiment 2～17

[0021] The solid adsorbent was prepared and evaluated according to the steps and conditions of Example 1. Just change the composition or preparation conditions, the changed conditions are listed in Table 1, and the evaluation results are listed in Table 2.

[0022] Table 1 Composition and preparation conditions of various adsorbents

[0023]

[0024] Table 2 Evaluation results of various adsorbents

[0025]

[0026] *The penetration capacity of the adsorbent is expressed by the weight of adsorbed water per gram of adsorbent.

Embodiment 18

[0028] Prepare the molecular sieve containing NaY and MgSO according to the method and steps of Example 1. 4 And CaCl 2 Solid adsorbent, but the prepared solution I contains 10% CaCl 2 Also contains 10% MgSO 4 . The obtained solid adsorbent is CaCl in weight fraction 2 Take up 7 copies, MgSO 4 It accounts for 13.2 parts, and the remainder is NaY molecular sieve. According to the same evaluation conditions as in Example 1, the through adsorption capacity of water is 4.01 g / g adsorbent, and the regeneration temperature of the adsorbent is 230°C.

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Abstract

The invention relates to an adsorption purification method for hydrocarbon stream, which is mainly used for solving the problems of low adsorption capacity of adsorbent, need of frequent regeneration and high regeneration temperature in the existing adsorption purification method. The method can better solve the problems by adopting the technical scheme of leading hydrocarbon raw material containing a certain amount of oxygen-containing compound impurities to be in contact with the solid compound adsorbent containing metal halide, wherein the adsorbent comprises halide or sulfate of at least one metal selected from alkali metals or alkaline-earth metals and at least one molecular sieve selected from A type, Y type, L type, mordenite, ZSM type zeolite or beta type molecular sieve, and be used for the adsorption purification industrial production of various types of hydrocarbon stream.

Description

Technical field [0001] The invention relates to a method for adsorbing and purifying hydrocarbon streams. Background technique [0002] In order to meet the needs of olefin polymerization, olefin disproportionation and other production processes, the purity requirements of industrial gas and liquid raw materials such as ethylene, propylene, butene, etc. continue to increase. Among them, H 2 The removal of impurities such as O, methanol, dimethyl ether and other oxygen-containing compounds is an extremely important process. Porous materials such as silica gel, alumina and molecular sieves are often used as adsorbents. US patent US 6111162 reports the use of silica gel as an adsorbent to adsorb and remove oxygenated compounds from hydrocarbon feedstocks. US Patent 4,371,718 reported that alumina was used as an adsorbent to remove methanol from butene feedstock. European patent EP 0229994 discloses the use of liquid C 3 ~C 5 A method of removing dimethyl ether from olefins. The m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/13B01J20/16B01J20/04C07C9/00C07C11/00C07C11/04
Inventor 肖永厚谢在库王仰东陶伟川刘苏
Owner CHINA PETROLEUM & CHEM CORP
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