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Hydrodewaxing catalyst and its preparing method

A catalyst and dewaxing technology, applied in the direction of petroleum wax recovery, etc., can solve the problems of unsatisfactory liquid recovery, high metal dispersion, side reactions, etc., to reduce side reactions such as hydrogenolysis and cracking, improve liquid recovery, reduce pour point effect

Active Publication Date: 2007-04-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high dispersion of metals in the catalyst, side reactions such as hydrogenolysis are prone to occur during the isomerization reaction, resulting in unsatisfactory liquid recovery.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of preparation method of catalyst (E-1) of the present invention

[0043] (1) The ZSM-5 molecular sieve used in the present invention is prepared according to the method in Example 2 of Chinese patent CN 1194942A, and the obtained molecular sieve has a silicon-aluminum ratio of 65 and a relative crystallinity of 95%. The ZSM-22 used is prepared according to the method in Example 1 of Chinese patent CN 1565969A, and the silicon-aluminum ratio of the obtained molecular sieve is 92. Fully mix ZSM-5, ZSM-22 and SB alumina powder, then add dilute nitric acid to peptize into a plastic paste, extrude into a cylindrical strip with a diameter of 1.5mm, dry at 110°C for 8 hours, and bake at 550°C After 4 hours, a catalyst carrier was obtained, the composition of which was: 10wt% ZSM-5, 50wt% ZSM-22 and 40wt% alumina.

[0044] (2) The carrier obtained in step (1) was impregnated with a solution containing zinc nitrate, then dried at 110° C. for 12 hours, and calcined at 50...

Embodiment 2

[0047] A kind of preparation method of catalyst (E-2) of the present invention

[0048] The preparation method of the catalyst is the same as that of Example 1, except that the catalyst composition is different. After the catalyst is calcined at 500° C. for 4 hours, the water vapor of 0.01 MPa is fed into it, and the temperature is kept constant for 1 hour to obtain the catalyst E-2 of the present invention. In the catalyst, zinc oxide The content of platinum is 5.2wt%, the content of platinum is 0.35wt%, and the specific surface area of ​​the catalyst is 284m 2 / g, the pore volume is 0.33ml / g, the degree of dispersion of platinum on the catalyst measured by hydrogen-oxygen titration is 56wt%, and the average diameter of microcrystalline platinum in the catalyst is 1.3nm.

Embodiment 3

[0050] A kind of preparation method of catalyst (E-3) of the present invention

[0051] The preparation method of the catalyst is the same as in Example 1, except that the catalyst composition is different. After the catalyst is roasted at 500° C. for 2 hours, the temperature is reduced to 300° C., and saturated water vapor is introduced under normal pressure, and the constant temperature is maintained for 8 hours to obtain the present invention. Catalyst E-3, the content of zinc oxide in the catalyst is 3.0wt%, the content of platinum is 0.80wt%, and the specific surface area of ​​the catalyst is 296m 2 / g, the pore volume is 0.39ml / g, the dispersion degree of platinum on the catalyst measured by hydrogen-oxygen titration is 28wt%, and the average diameter of microcrystalline platinum in the catalyst is 3.8nm.

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PUM

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Abstract

The invention disclosed a deparaffinage as well as its preparing method. The ingredients of the catalyst include TON and MFI molecular sieve, inorganic smelting proof oxide and hydrogenated active precious metal, of which the dispersity of the precious metal on the catalyst is 20wt%-60wt% and the average diameter of the metal is 1nm-4nm. The catalyst has proper metal dispersity and mocrocrystal size; so that it matches the catalyst's acidifying function with its hydrogenating function. It decreased the side reaction of hydrogenolysis and crack as well as increased the activity and selectivity of the catalyst. When the catalyst is used in the hydrogenating deparaffinage process, it can not only decrease the product's pour point, it can also improve the viscosity index and the liquid yield.

Description

technical field [0001] The invention relates to a hydrodewaxing catalyst and a preparation method thereof. More specifically, it relates to a hydrodewaxing catalyst for waxy raw oil and a preparation method thereof, which is especially suitable for the hydrodewaxing process of lubricating oil. Background technique [0002] The waxy feed oil mentioned in the present invention mainly includes diesel oil, hydrocracking tail oil and lubricating oil fractions. Waxy raw oils, especially heavy distillate oils derived from paraffin-based crude oils, contain more waxes, have higher freezing points, and poor low-temperature fluidity. During storage, transportation, and use, the oil will Thickening, even solidification, thereby blocking the oil pipeline and interrupting the oil supply to the engine to cause engine failure. 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 solv...

Claims

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Application Information

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IPC IPC(8): C10G73/02
Inventor 刘全杰徐会青贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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