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 hydrogenolysi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1

[0042] A preparation method of the 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 of Example 2 of Chinese Patent CN 1194942A, and the obtained molecular sieve has a silicon-to-aluminum ratio of 65 and a relative crystallinity of 95%. The ZSM-22 used was prepared according to the method of Example 1 of Chinese Patent CN 1565969A, and the obtained molecular sieve had a silicon-to-aluminum ratio of 92. Mix ZSM-5, ZSM-22 and SB alumina powder thoroughly, then add dilute nitric acid to peptize it into a plastic paste, extrude it into a cylindrical strip with a diameter of 1.5mm, dry it at 110°C for 8 hours, and fire it 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) Impregnating the carrier obtained in step (1) with a solution containing zinc nitrate, then drying at 110°C for...

Example Embodiment

[0046] Example 2

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

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

Example Embodiment

[0049] Example 3

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

[0051] The preparation method of the catalyst is the same as that of Example 1. The difference is that the composition of the catalyst is different. After the catalyst is calcined at 500°C for 2 hours, the temperature is reduced to 300°C, saturated steam is introduced under normal pressure, and the temperature is kept constant 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 platinum dispersion on the catalyst measured by oxyhydrogen titration is 28wt%, and the average diameter of the microcrystalline platinum in the catalyst is 3.8nm.

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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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