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N-butane hydroisomerization catalyst, and preparation method and application thereof

A technology for hydroisomerization and catalyst, which is applied in the field of n-butane hydroisomerization catalyst, can solve the problems of catalyst activity and selectivity decline, and achieve the effect of improving diffusion limitation and changing pore structure.

Active Publication Date: 2012-06-20
LUOYANG RONGHUI CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the shortcomings of the preparation process of SAPO series catalysts, especially when the active components are loaded, the acid centers are covered, which leads to the decline of the activity and selectivity of the catalysts. Method for modifying molecular sieves

Method used

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  • N-butane hydroisomerization catalyst, and preparation method and application thereof
  • N-butane hydroisomerization catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 150 grams of commercially available NaY molecular sieves, impregnate with 80 ml of chlorinated mixed rare earth solution with a mass content of mixed rare earth metal oxides of 30% and 200 ml of deionized water, mix and stir at 25 ° C, and perform exchange modification for 2 hours, 110 °C After drying for 2 hours, pulverized, calcined at 500°C for 4 hours, then washed with 200ml deionized water at 25°C for 1 hour at room temperature, filtered, and the filter cake was dried at 120°C to obtain a modified Y molecular sieve, rare earth metal oxide The substance content is 12.4%, referred to as Y1 for standby. Rare earth chloride is a rare earth chloride industrial product used by Baotou Rare Earth Company for catalytic cracking, and the content of rare earth metal oxides is greater than 45%.

Embodiment 2

[0035] Take 150 grams of commercially available NaY molecular sieves, impregnate them with 80ml of chlorinated mixed rare earth solution with a mass content of mixed rare earth metal oxides of 35% and 200ml of deionized water, mix and stir at 25°C, and carry out exchange modification for 2 hours, at 110°C After drying at 500°C for 2 hours, crushing, and roasting at 500°C for 4 hours, washing with 200ml deionized water at room temperature, filtering for 1 hour, and drying the filter cake at 120°C to obtain a modified Y molecular sieve, wherein the rare earth metal oxide content 18.6%, referred to as Y2 reserve.

Embodiment 3

[0037] Take 150 grams of commercially available NaY molecular sieves, impregnate them with 80 ml of chlorinated mixed rare earth solution with a mass content of mixed rare earth metal oxides of 15% and 200 ml of deionized water, mix and stir at 25°C, and carry out exchange modification for 2 hours, at 110°C After drying at 500°C for 2 hours, crushing, and roasting at 500°C for 4 hours, washing with 200ml deionized water at room temperature, filtering for 1 hour, and drying the filter cake at 120°C to obtain a modified Y molecular sieve with a rare earth metal oxide content of 6.2%, referred to as Y3 reserve.

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Abstract

The invention discloses an n-butane hydroisomerization catalyst, and a preparation method and application thereof. The catalyst is prepared from 5-35 wt% of modified Y molecular sieve, 45-75 wt% of SAPO-11 molecular sieve, 0.05-5.0 wt% of noble metal active component, 0.05-5.0 wt% of assistant active metal component tin and 10-20 wt% of aluminum oxide adhesive, wherein the noble metal active component is dispersed in the modified Y molecular sieve and SAPO-11 molecular sieve. Since the modified Y molecular sieve is added, alkane molecules can generate carbonium ions required by the reaction process more easily; the modified Y molecular sieve has large pore canals, and thus, can effectively decrease the blocked pore canals in the molecular sieve and change the pore canal structure of the catalyst support; and the pore size of the Y molecular sieve can be modified and adjusted to change the pore volume of the molecular sieve and improve the diffusion restriction of the pore canals on the reactant or product molecules, thereby effectively performing the isomerization reaction and obtaining the high-yield isomerizate.

Description

technical field [0001] The invention relates to a catalyst, in particular to a n-butane hydroisomerization catalyst and its preparation method and application. Background technique [0002] According to the reaction mechanism of alkane hydroconversion, n-paraffins can be converted into isoparaffins with the same carbon number as the raw material molecules by hydroisomerization; they can also be converted into isoparaffins and normal paraffins with fewer carbon numbers than the raw material molecules through hydrocracking mixture. The high selectivity of the catalyst for the isomerization of long-chain alkanes comes from the balance of acidity and metal hydrogenation / dehydrogenation performance, and more from the shape selectivity of the unique pore structure of the molecular sieve carrier. Properly adjust the relative activity of the three functions of acidity, metallicity and shape selectivity of the catalyst. On the one hand, to improve the hydrogenation activity of the c...

Claims

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Application Information

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IPC IPC(8): B01J29/85C10G45/64C10G73/02
Inventor 龚旭辉
Owner LUOYANG RONGHUI CHEM TECH CO LTD
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