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Normal alkane isomerization catalyst and preparation method thereof

A technology of n-paraffin and catalyst, which is applied in the field of n-paraffin isomerization catalyst and its preparation, and achieves the effect of high isomerization selectivity

Active Publication Date: 2008-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the application of IB element modified molecular sieves to the isomerization of long-chain n-alkanes.

Method used

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  • Normal alkane isomerization catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method of catalyst (E-1) of the present invention is as follows:

[0038] (1) ZSM-22 used in the present invention is prepared according to the method of Chinese Patent CN1565969A Example 1, and the obtained molecular sieve has a silicon-aluminum molar ratio of 92 and a specific surface area of ​​223m 2 / g, pore volume 0.21mL / g.

[0039] (2) be mixed with silver nitrate (Tianjin Chemical Reagent Factory, analytically pure) and be mixed with the aqueous solution that contains silver weight percent concentration and be 3.0%, the molecular sieve 4850 grams that step (1) obtains is fully mixed with 5000 grams above-mentioned silver-containing aqueous solution, in 110 6 hours at 450°C and 6 hours at 450°C to obtain ZSM-22 with a silver content of 3.0% by weight, where ZSM-22 containing IB elements is called a modified molecular sieve (the same below).

[0040] (3) Get the modified molecular sieve (dry basis weight, hereinafter the same) that 1500 gram steps ...

Embodiment 2

[0043] The preparation method of catalyst (E-2) of the present invention is as follows:

[0044] The preparation method of the catalyst is the same as in Example 1, except that the weight content of silver in the molecular sieve is 5%, the composition of the catalyst carrier is 20wt% modified ZSM-22 and 80wt% alumina, and the content of platinum in the catalyzer is 0.80wt%. The drying and calcination conditions of the catalyst were as follows: constant temperature at 110°C for 4 hours and constant temperature at 420°C for 6 hours. The catalyst of the present invention was numbered E-2.

Embodiment 3

[0046] The preparation method of catalyst (E-3) of the present invention is as follows:

[0047] The preparation method of the catalyst is the same as in Example 1, except that the solution used is that the concentration of silver is 12wt%, and the content of silver in the obtained molecular sieve is 11.8wt%, the hydrogenation component is palladium, and the impregnation solution used is a palladium nitrate solution , wherein palladium is calculated as metal, and the solution concentration is 5wt%, to obtain catalyst E-3 of the present invention, its composition and physical and chemical properties are shown in Table 1, and the evaluation results are shown in Table 2.

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Abstract

The invention discloses normal alkane isomerization catalyst and a preparation method thereof. The catalyst comprises a TON molecular sieve, inorganic melt-resistant oxide and hydrogenation component, wherein, the TON molecular sieve contains IB elements, the weight content of the IB elements in the molecular sieve is 0.5 to 10 percent counted by the metal. The preparation process of the catalyst comprises the following steps: firstly, the IB elements are loaded onto the molecular sieve, and then are prepared into the catalyst. The catalyst is used for the isomerization process of the normal alkane, and has the characteristic of high reaction selectivity.

Description

technical field [0001] The invention relates to a normal paraffin isomerization catalyst and a preparation method thereof. More specifically, it relates to a long-chain n-paraffin isomerization catalyst and a preparation method thereof, which is especially suitable for the isomerization process of n-dodecane. Background technique [0002] Petroleum fractions, especially heavy distillates derived from paraffin-based crude oil, contain more wax, have a higher freezing point, and have poor low-temperature fluidity. During storage, transportation, and use, the oil will change as the ambient temperature decreases. Thick, even solidified, thereby blocking the oil pipeline and interrupting the oil supply to the engine to cause the engine to fail. At present, there are many methods to solve various problems caused by solidification of waxy heavy distillate oil, and the main method is dewaxing, including solvent dewaxing, catalytic dewaxing and isomerization dewaxing. [0003] Solv...

Claims

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Application Information

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IPC IPC(8): B01J29/72C07C5/27
Inventor 刘全杰徐会青贾立明王刚王伟
Owner CHINA PETROLEUM & CHEM CORP
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