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Adsorbent for removing impurities in coal chemical olefin stream and its application

A technology of coal chemical industry and adsorbent, which is applied in the field of adsorbent for removing impurities, can solve the problems of affecting the polymerization speed of polyethylene molecular weight, destroying the activity of polymerization catalyst, and unfavorable regeneration of adsorbent, so as to reduce thermal effect, improve regeneration performance, and improve The effect of utilization

Active Publication Date: 2018-07-06
SHANGHAI LVQIANG NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of carbon dioxide not only blocks equipment and pipelines due to the formation of dry ice at low temperature during cryogenic separation, but also destroys the activity of polymerization catalysts, affecting the polymerization speed and molecular weight of polyethylene
However, the pore structure of the formed adsorbent is not designed, which is not conducive to the regeneration of the adsorbent, and the regeneration energy consumption is relatively high

Method used

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  • Adsorbent for removing impurities in coal chemical olefin stream and its application
  • Adsorbent for removing impurities in coal chemical olefin stream and its application
  • Adsorbent for removing impurities in coal chemical olefin stream and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take 100kg of mesoporous alumina, its small angle diffraction XRD spectrum is as follows figure 1 As shown, it is formed by rolling balls in a disc granulator, formed into 2-3mm particles, and then taken out. At 60°C, water vapor is sprayed to complete the hydration and aging process. The hydration process lasts for 6 hours, and then taken out at 120°C Dry it and activate it rapidly at 450°C to obtain a molded product. The sample is numbered S1.

Embodiment 2

[0042] Take 100kg of mesoporous alumina modified by lanthanum nitrate, roll it into a disc granulator to shape it into 2-3mm particles, take it out, spray water vapor at 60°C to complete the hydration and aging process, and hydration The process lasts for 6 hours, and then it is taken out and dried at 120°C, and activated rapidly at 450°C to obtain a molded product. The sample is numbered S2.

Embodiment 3

[0046] Take 45kg of 13X molecular sieve and 55kg of mesoporous alumina, mix them with balls in a disc granulator, form them into 2-3mm particles, take them out, and spray water vapor at 60°C to complete the hydration and aging process. After 6 hours, it was taken out and dried at 120°C, and activated rapidly at 450°C to obtain a molded product. The sample is numbered S3.

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Abstract

The invention relates to an adsorbent for removing impurities in olefin streams in coal chemical industry and its application. The adsorbent is prepared from the following components and raw materials in parts by weight: zeolite molecular sieve 1-99, mesoporous material 1-99, metal component 0.01 ~10, at least one of the metals or metal oxides of Group 1, Group 2 or Group 11 is supported on the zeolite molecular sieve, and Group 3, Group 4, Group 11 or Group 12 is supported on the mesoporous material at least one of metals or metal oxides. Compared with the prior art, the invention can reduce the oxygenated compound in the olefin stream to ppb level (weight ratio), and the adsorbent for removing the oxygenated compound has lower adsorption activity to ethylene and propylene in the olefin stream.

Description

technical field [0001] The invention relates to an adsorbent, in particular to an adsorbent for removing impurities in olefin streams in coal chemical industry and its application. Background technique [0002] Coal chemical industry refers to the process of using coal as raw material and converting coal into gas, liquid and solid fuels and chemicals through chemical processing. Traditional olefins are mainly produced by cracking petroleum. Coal-to-olefins are produced from coal to methanol, which is then dehydrated by dimethyl ether to produce low-carbon olefins including ethylene and propylene. Among them, formaldehyde, carbon monoxide, carbon dioxide, water and other substances will be generated, as well as unreacted dimethyl ether and methanol. It can be seen that compared with the traditional petroleum cracking to olefins, the main impurities in coal-based methanol to olefins are oxygenated compounds. The presence of carbon dioxide not only blocks equipment and pipeli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01D53/02B01D15/08
Inventor 夏思奇徐华胜王鹏飞胡杰张佳何秋平朱琳周永贤
Owner SHANGHAI LVQIANG NEW MATERIALS CO LTD
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