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Preparation and application method of a highly selective non-precious metal long-chain alkane isomerization catalyst

A long-chain alkane and non-precious metal technology, which is applied in the preparation and application of high-selectivity non-precious metal long-chain alkane isomerization catalysts, can solve the problem of lower catalyst specific surface, unsatisfactory catalyst hydrofining performance, and poor pour point depressing effect and other problems, to achieve the effect of improving activity and selectivity, unobstructed channels and improving selectivity

Active Publication Date: 2015-12-30
CHINA HUADIAN SCI & TECH INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the catalyst does not contain tungsten oxide and only contains a small amount of nickel oxide, the hydrofining performance of the catalyst is not ideal, but when the catalyst prepared by the impregnation method contains tungsten oxide (the loading of the hydrogenation component is increased), the specific surface of the catalyst is obvious The depressing effect is worse than that of the catalyst containing only nickel oxide

Method used

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  • Preparation and application method of a highly selective non-precious metal long-chain alkane isomerization catalyst
  • Preparation and application method of a highly selective non-precious metal long-chain alkane isomerization catalyst
  • Preparation and application method of a highly selective non-precious metal long-chain alkane isomerization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of a high-selectivity non-precious metal long-chain alkane isomerization catalyst is as follows:

[0033] (1) Synthesis of SAPO-11 molecular sieve, molar ratio: Al 2 O 3 :P 2 O 5 : DPA: 0.3SiO 2 : 60H 2 O.

[0034] Mix 250g of water and 47.6g of SB powder and stir; mix 77.5g of phosphoric acid and 80g of water and add dropwise to the mixture of SB powder and water, and stir for more than 4 hours after the dropwise addition; then add 34.7g of template agent di-n-propylamine dropwise and stir for 2 hours above, and then dropwise add 23.3g of silica sol (SiO 2 Content 26%), stirred for more than 2 hours, installed in a kettle, crystallized at 200°C for 48h, then centrifuged, washed, dried at 120°C overnight, and calcined at 550°C for 24h.

[0035] (2) According to the ratio of Ni / W atomic ratio of 1:1, 44.4g of basic nickel carbonate and 76.55g of ammonium metatungstate were added to 500ml of distilled water, and then 10g of succulent powder was...

Embodiment 2

[0040] The basic situation is the same as in Example 1, except that the ratio of NiW composite oxide, molecular sieve and SB powder in the catalyst is 3:7:3, and 15g of NiW composite oxide is taken to participate in the kneading.

[0041] The reaction results are shown in Table 1. figure 1 . From Table 1, figure 1 It can be seen that the isomerization selectivity of the catalyst 23.1% NiW-Keaded prepared by the kneading method is higher than that of the catalyst 20% NiW-Impregnated prepared by the equal volume impregnation method.

Embodiment 3

[0043] The basic situation is the same as in Example 1, except that the ratio of NiW composite oxide, molecular sieve and SB powder in the catalyst is 4:7:3, and 20 g of NiW composite oxide is taken to participate in the kneading.

[0044] The reaction results are shown in Table 1. figure 1 . From Table 1, figure 1 It can be seen that the isomerization selectivity of the catalyst 28.6% NiW-Keaded prepared by the kneading method is high, which is much higher than that of the catalyst 20% NiW-Impregnated prepared by the equal volume impregnation method.

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Abstract

The invention relates to a high-selectivity non-precious-metal long-chain alkane isomerization catalyst and a preparation method of the high-selectivity non-precious-metal long-chain alkane isomerization catalyst. The catalyst contains SAPO-11 / 31 / 41 or modified ZSM-22 / 23 molecular sieve, a VIBth or VIIIth hydrogenated active metal component, inorganic refractor oxide and the like. The preparation method of the catalyst comprises the following steps of preparing porous CoMoNiW oxide, and synthesizing SAPO-11 / 31 / 41 or modifying ZSM-22 / 23; mixing the molecular sieve and inorganic refractory oxide, adding a peptizing agent, water and an extrusion assistant, and extruding the mixture into cream; mixing the CoMoNiW oxide and the cream, and extruding the mixture into strips; and finally drying and baking the strips to obtain the catalyst. The method can be used for preparing the catalyst with different hydrogenated active component contents and especially with high hydrogenated component content. The prepared catalyst adopts the non-precious metal as a hydrogenated component, the specific surface area and pore volume are large, the catalyst pore canals are smooth, and the catalyst is applicable to the more than C7 long-chain alkane isomerization reaction, good in activity and high in isomerization selectivity.

Description

technical field [0001] The invention relates to the preparation and application fields of isomerization catalysts, in particular to a preparation and application method of a high-selectivity non-precious metal long-chain alkane isomerization catalyst. Background technique [0002] Will C 5 / C 6 The conversion of normal paraffins into isoparaffins is an effective method for producing high-octane clean gasoline. The commonly used light hydrocarbon isomerization method is to use molecular sieve-based bifunctional catalysts for hydroisomerization at 220-300 °C. The commonly used molecular sieves are X, Y and mordenite. [0003] for C 7 For the above normal alkanes, if the above-mentioned molecular sieve-based catalyst is used for the isomerization reaction, the cracking activity of the catalyst will be too high, which will lead to a decrease in the liquid yield of the reaction product and low selectivity of the process. Studies have shown that SAPO-11 / 31 / 41 and ZSM-22 / 23 mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85B01J29/78C10G45/64
Inventor 柳云骐马跃龙胡小夫潘原柴永明姚小强肖可勤刘晨光
Owner CHINA HUADIAN SCI & TECH INST
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