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A kind of isomerization dewaxing catalyst and preparation method thereof

A technology of isomerization dewaxing and catalyst, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of poor activity and diffusion performance, reduction of effective utilization of molecular sieves, and influence on catalyst selectivity and stability. To avoid the discharge of difficult waste water, the active particles are small, and the product yield is high.

Active Publication Date: 2018-02-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is a catalyst prepared by a conventional impregnation method, the effective utilization rate of the molecular sieve is reduced, the activity and diffusion performance are deteriorated, and the selectivity and stability of the catalyst are affected.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation step of catalyst of the present invention is as follows:

[0026] (1) Dissolve chloroplatinic acid containing 1 gram of platinum in 14 grams of water, and 19 grams of ZSM-22 molecular sieve (0.5 microns in particle size, SiO 2 / Al 2 o 3 The molar ratio is 65) and the above solution are fully mixed, and the mixture is dried at 120°C for 16 hours and calcined at 480°C for 4 hours to obtain platinum-loaded ZSM-22 molecular sieves;

[0027] (2) Dissolve 90 grams of water-soluble cornstarch (molecular weight: 35,000) in 300 grams of water, then add 10 grams of the molecular sieve obtained in step (1) at room temperature, fully stir into a uniform suspension, and vacuum spray dry (vacuum The temperature is 0.03MPa, the drying temperature is 60°C, and the drying time is 5h), and a starch-embedded molecular sieve with an average particle diameter of 80 microns is obtained.

[0028] (3) Mix 25 grams of starch-embedded molecular sieve prepared in step (2) w...

Embodiment 2

[0031] An embodiment of the catalyst of the present invention is the same as in Example 1, except that the substance content in each step is adjusted, NU-10 (particle diameter is 0.8 micron, SiO 2 / Al 2 o 3 The molar ratio is 50) to replace the ZSM-22 molecular sieve to obtain the catalyst composition, in terms of mass fraction, Pt: 0.02%, NU-10: 3.0%, alumina: the balance. See Table 2 for the evaluation results.

Embodiment 3

[0033] An embodiment of the catalyst of the present invention is the same as in Example 1, except that the substance content in each step is adjusted, the mass ratio of starch to molecular sieve is 5:1, and the starch-embedded molecular sieve with an average particle diameter of 50 microns is prepared. . The catalyst composition is obtained, in terms of mass fraction, Pt: 0.1%, ZSM-22: 10%, alumina: the balance. See Table 2 for the evaluation results.

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Abstract

The invention discloses a heterogeneous dewaxing catalyst and a preparation method thereof. The method is to embed the TON type molecular sieve loaded with hydrogenation active components in the organic matter, then mix evenly with the precursor of the high temperature resistant inert oxide, form, dry and roast to obtain the isomerization dewaxing catalyst. The catalyst of the present invention is particularly suitable for use in the isomerization dewaxing process of lubricating oil fractions. Compared with the existing technology, since the amount of molecular sieve in the catalyst is greatly reduced, not only the production cost of the catalyst is greatly reduced, but also the discharge of difficult-to-treat wastewater in the synthesis process of the molecular sieve is avoided, and it has the advantages of high yield of the target product and low pour point features.

Description

technical field [0001] The invention relates to a heterogeneous dewaxing catalyst and a preparation method thereof. The isomerization dewaxing catalyst is used in the isomerization dewaxing process of waxy raw material oil, and is especially suitable for the process of producing high-grade lubricating oil base oil. Background technique [0002] The waxy feed oil mentioned in the present invention mainly includes diesel oil, atmospheric distillate oil (AGO), vacuum distillate oil (VGO), white 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/74C10G45/64C10G73/02
Inventor 徐会青刘全杰贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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