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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

With this method, the effective utilization rate of molecular sieves 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

[0024] A kind of preparation step of catalyst of the present invention is as follows:

[0025] (1) Dissolve chloroplatinic acid containing 1 gram of platinum in 14 grams of water, and 19 grams of ZSM-23 molecular sieve (0.5 microns in particle size, SiO 2 / Al2 o 3 The molar ratio is 35) and the above solution is 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-23 molecular sieves;

[0026] (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 the starch-embedded catalytically active species with an average particle diameter of 80 microns is obtained.

[0027] (3) Mix 25 grams of the starch-embedded molecular sieve prep...

Embodiment 2

[0030] An embodiment of the catalyst of the present invention is the same as Example 1, the difference is that the substance content in each step is adjusted, SSZ-32 (particle diameter is 0.7 micron, SiO 2 / Al 2 o 3 The molar ratio is 25) to replace the ZSM-23 molecular sieve, and the catalyst composition is obtained as Pt: 0.02%, SSZ-32: 4.0%, and alumina: the balance. See Table 2 for the evaluation results.

Embodiment 3

[0032] 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 obtained catalyst composition is Pt: 0.1%, ZSM-23: 8%, alumina: balance. See Table 2 for the evaluation results.

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Abstract

The invention discloses an isomerization dewaxing catalyst, and a preparation method thereof. According to the preparation method, MTT-type molecular sieve loaded with a hydrogenation active ingredient is coated with an organic matter, an obtained product is uniformly mixed with a precursor of a high temperature resistant indifferent oxide, and an obtained mixture is subjected to moulding, drying, and roasting so as to obtain the isomerization dewaxing catalyst. The isomerization dewaxing catalyst is especially suitable for isomerization dewaxing of lubricating oil cut fractions. Compared with the prior art, the isomerization dewaxing catalyst possesses following advantages: molecular sieve using amount of the isomerization dewaxing catalyst is reduced greatly, so that catalyst production cost is reduced greatly, and discharge of wastewater difficult to process in molecular sieve synthesis process is avoided; target product yield is high; and pour point is low.

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, AGO, VGO, white oil, hydrocracking tail oil and lubricating oil fractions, etc. 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,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/74C10G45/64C10M101/02
Inventor 徐会青刘全杰贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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