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Catalyst for removing olefins in reformate and preparation method of catalyst

A technology for removing olefins and catalysts, applied in the field of catalysts for removing trace olefins and its preparation, can solve problems such as increased energy consumption and loss of aromatics, and achieve the effects of improving utilization, reducing dealkylation, and reducing dosage

Active Publication Date: 2014-01-08
KAIRUI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned published invention patents, the acidity of the catalyst is mainly supplied by molecular sieves, which is weak for the removal of trace olefins in reformed oil through alkylation reaction, and requires a higher reaction temperature during use. To achieve the purpose of completely removing olefins will not only lead to increased energy consumption, but also cause side reactions such as coking, dealkylation of aromatics, and cracking of aromatics, resulting in the loss of aromatics

Method used

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  • Catalyst for removing olefins in reformate and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] ① 51 parts by weight of commercially available MCM-22 molecular sieve, 1 part by weight of alumina dry rubber powder, FeCl 3 30 parts by weight were added to the mixer and mixed for 5 minutes. Add dilute nitric acid with a concentration of 1wt%, mix, knead, extrude into a cylindrical shape with a diameter of ∮1.5×2mm, dry at 120°C for 2 hours, and collect the product;

[0021] ②Add the product of step ① into the aqueous solution of scandium nitrate, stand and impregnate at 35°C for 10 hours to make the catalyst contain 0.1 parts by weight of scandium nitrate, and roast at 600°C for 4 hours, the obtained product number is KC-1. Example 2

Embodiment 2

[0022] The molecular sieve adopts 25 parts by weight of β-type molecular sieve and 26 parts by weight of Y-type molecular sieve, and the Lewis acid adopts ZnCl 2 1 part by weight, using water to mix, knead and extrude molecular sieves, Lewis acid and alumina dry rubber powder; the catalyst contains 1.5 parts by weight of cerium nitrate; roasting at 300 ° C for 10 hours; other is the same as in Example 1, the product obtained The number is KC-2.

Embodiment 3

[0024] The molecular sieve adopts 30 parts by weight of X-type molecular sieve and 35 parts by weight of ZSM-5 type molecular sieve, and the Lewis acid adopts AlF 3 40 parts by weight; the catalyst contains 3 parts by weight of cerium nitrate; roasting at 800° C. for 1 hour, and the others are the same as in Example 1, and the obtained product number is KC-3.

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PUM

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Abstract

Disclosed are a catalyst for removing olefins in reformate and a preparation method of the catalyst. The catalyst comprises, by weight, 51-80 parts of molecular sieves, 1-40 parts of Lewis acid, 1-19 parts of binder and 0.1-8 parts of rare-earth metal salt. According to the preparation method, a certain amount of the Lewis acid is added in the catalyst, a certain amount of the rare-earth metal salt is loaded onto a molecular sieve catalyst carrier by a dipping method, and the catalyst for removing the olefins in the reformate is obtained and is high in low-temperature catalytic activity and stability, long in service life and capable of being regenerated and cyclically used.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst for removing trace olefins from reformed oil and a preparation method thereof. Background technique [0002] Reformed oil is made of C6~C11 naphtha fractions as raw materials. In the catalytic reforming unit, under certain operating conditions and the action of catalysts, the hydrocarbon molecules are rearranged to convert naphthenes and alkanes into aromatics or isomerization An oil of alkanes. The aromatic hydrocarbon content of the reformed oil is 30% to 50%. After extraction and separation, benzene, toluene, xylene and other products can be obtained. Reformate is a blending stock for high-octane gasoline and a major source of petroleum aromatics. [0003] However, reformed oil usually contains a small amount of olefin impurities. This part of olefins is active in nature and easily forms colloids to affect the quality of aromatic products. Some petroc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76B01J29/80B01J29/08C10G29/16
Inventor 刘文飞郭为磊
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH