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N-alkene isomerization catalyst and preparation method and application thereof

An olefin isomerization and catalyst technology, which is applied in the field of normal olefin isomerization catalyst and its preparation, can solve the problems of easy performance decline, performance decline and high cost, and achieves the advantages of reducing side reactions, reducing quantity and maintaining yield. Effect

Active Publication Date: 2016-11-09
山东迅达化工集团有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Benefits of technology

In this patented method for producing an olefin-based chemical called Isoprene (isobutene), it involves treating certain types of zeolite catalysts that are used during production or refining processes. By reducing their acid content by heat treatment at high temperatures before use, they can be made more effective without causing problems such as increased pressure drop across filters caused by excessive accumulation of impurity elements on them' surfaces.

Problems solved by technology

This patented technical solution described involves improving the efficiency at which MT BE breaks into two different products: 1) regular hexa-1-4% paraffin with less volatile components that make up about 75% of all fuel oil fractions; 2) isooctenes containing greater amounts of unsaturates compared to usual naphtha due to their higher boiling point and lower evaporation temperature. These modifications result in improved quality fuels made through chemical processes involving sulfur compounds and other impurities present during refining operations.

Method used

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  • N-alkene isomerization catalyst and preparation method and application thereof
  • N-alkene isomerization catalyst and preparation method and application thereof
  • N-alkene isomerization catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Use crystallized SAPO-11 molecular sieve raw powder and crystallized ZSM-5 molecular sieve raw material as raw materials; SAPO-11 molecular sieve raw powder is easy to disperse to an average particle size of 1.2um, crystallinity 95%, chemical composition P 2 o 5 41%, SiO 2 12%, Al 2 o 3 47% (mass); ZSM-5 molecular sieve raw powder is easily dispersed to an average particle size of 1.6um, a silicon-aluminum ratio of 70, and a crystallinity of 95%. Catalysts were prepared as follows:

[0027] A. Add 50kg of deionized water to the 60L batching tank, add 2.0kg of SAPO-11 molecular sieve former powder, 0.5kg of ZSM-5 molecular sieve former powder and 3.75kg of pseudo-boehmite dry powder, add 0.56kg of ammonium acetate, and beat;

[0028] C. The slurry is transferred into a 100L autoclave, and crystallized at 200°C for 20hr;

[0029] D. Spray dry the slurry at 200°C, take 5.0kg of dry powder, add 0.15kg of scallop powder and mix evenly, add 4.5kg of aqueous solution co...

Embodiment 2

[0032] Basically the same as in Example 1, the difference is that in the slurry in step A, the amount of SAPO-11 molecular sieve raw powder added is 2.125 kg, and the added amount of ZSM-5 molecular sieve raw powder is 0.375 kg.

[0033] Calculated from the feed ratio, the catalyst prepared in this example contains 50% (mass) of molecular sieves and 50% (mass) of alumina; SAPO-11 accounts for 85% (mass) of molecular sieves, and ZSM-5 accounts for 85% (mass) of molecular sieves. 15% (mass) of the total amount. Judging from the electron micrographs (SEM) of the surface and section of the catalyst, the particle size of the molecular sieve in the catalyst is 1-2um.

Embodiment 3

[0035] Basically the same as in Example 1, the difference is that in the slurry of step A, the amount of pseudo-boehmite dry powder added is 1.60 kg, and in step D, 2.5 kg of dry powder is mixed with 0.075 kg of scallop powder, and an aqueous solution containing 0.10 kg of acetic acid is added 2.3kg.

[0036]Calculated from the feed ratio, the catalyst prepared in this example contains 70% (mass) of molecular sieves and 30% (mass) of alumina; SAPO-11 accounts for 80% (mass) of molecular sieves, and ZSM-5 accounts for 80% (mass) of molecular sieves. 20% of the total (mass). Judging from the electron micrographs (SEM) of the surface and section of the catalyst, the particle size of the molecular sieve in the catalyst is 1-2um.

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Abstract

The invention provides an n-alkene isomerization catalyst. The catalyst contains 50-90% (by mass) of a molecular sieve and the balance aluminum oxide; the molecular sieve is composed of SAPO-11 and ZSM-5, wherein SAPO-11 accounts for 75-90% (by mass) of the total mass of the molecular sieve, and ZSM-5 accounts for 10-25% (by mass) of the total mass of the molecular sieve; the microparticle size of the molecular sieve in the catalyst is 1-2 micrometers. The catalyst has high n-alkene isomerization activity, the isoalkene yield is high and can be maintained for a long time, a long one-way running cycle is achieved, the decreasing amplitude of regeneration performance obtained after multiple times of scorching is small, and the catalyst is suitable for the process of preparing isobutene from n-butene through an isomerization reaction and the process of preparing isopentene from n-pentene through an isomerization reaction and particularly suitable for the process of preparing isobutene through post-etherification C4 n-butene isomerization.

Description

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Claims

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Application Information

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Owner 山东迅达化工集团有限公司
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