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Preparation method of rare-earth-containing Y molecular sieve

A technology of molecular sieves and rare earths, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of small and unresolved rare earth ion exchange capacity, and achieve enhanced rare earth ion exchange capacity, uniform distribution, and easy operation simple effect

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method improves the distribution of rare earth on the zeolite, but it does not solve the shortcoming that the rare earth ion exchange capacity is small when the rare earth ion solution is exchanged with molecular sieves.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1000 grams of NaY molecular sieves were placed in one liter containing 150 grams of (NH 4 ) 2 SO 4 In the aqueous solution, the temperature was raised to 90-95°C, stirred for 1 hour and then filtered, and the filter cake was re-used with one liter of 150 grams of (NH 4 ) 2 SO 4 The aqueous solution was exchanged three times under the same conditions, and the product obtained above was placed in a hydrothermal treatment furnace with external heat and internal pressure, and the temperature was raised to 610 °C at a rate of 250 °C / hour, and the total pressure of the system was maintained. At 0.10MPa, and make the ratio of water vapor partial pressure to ammonia partial pressure 1.35:1, maintain this condition for 4 hours, and then pass through N 2 air to cool the sample to room temperature, take out the sample, and wash the sample with H + , NH 4+ , lanthanum and cerium rare earth metal ions (in RE 2 o 3 Count, La 2 o 3 Accounting for 52.5%, CeO 2 accounted for ...

Embodiment 2

[0025] After getting 1000 grams of NaY molecular sieves and carrying out ammonium exchange and hydrothermal treatment under the same conditions as in Example 1, the sample was treated with H + , NH 4+ , lanthanum, cerium, praseodymium, rubidium metal ions (in RE 2 o 3 Count, La 2 o 3 Accounting for 42.5%, CeO 2 Accounting for 37.5%, Pr 2 o 5 14.2%, Nd 2 o 3 accounted for 5.8%) and dodecanol mixed solution treatment (the composition of the mixed solution is shown in Table 1), the weight ratio of molecular sieve to the mixed solution is 1:6, the temperature is 85 ° C, the time is 1 hour, suction filtration, with the above The mixed solution was repeatedly operated 3 times to obtain sample B, the properties of which are listed in Table 2.

Embodiment 3

[0027] Get 1000 grams of NaY molecular sieves and carry out ammonium exchange and hydrothermal treatment under the same conditions as in Example 1, and the sample is treated with H + , NH 4+ , lanthanum, cerium, praseodymium, rubidium metal ions (in RE 2 o 3 Count, La 2 o 3 Accounting for 50.3%, CeO 2 Accounting for 43.5%, Pr 2 o 5 Accounting for 5.3%, Nd 2 o 3 0.9%) and methylglyoxal (see Table 1 for the composition of the mixed solution), the weight ratio of the molecular sieve to the mixed solution is 1:7, the temperature is 95°C, the time is 1 hour, suction filtration, and the above mixed solution The operation was repeated 3 times to obtain sample C, the properties of which are listed in Table 2.

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PUM

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Abstract

The invention discloses a preparation method of a rare-earth-containing Y molecular sieve. The method comprises the following steps: by using an NaY molecular sieve as a raw material, carrying out ammonium exchange treatment, carrying out steam treatment, treating the Y molecular sieve subjected to steam treatment with a mixed solution containing H<+>, NH4<+>, RE<3+> and organic solvent, and drying to obtain the finished product. The invention uses the rare earth ion exchange method to prepare the REY, and the organic reagent is added into the ion exchange liquid, thereby maintaining the advantages of simple operation and uniform rare earth distribution in zeolite in the ion exchange method, enhancing the rare earth ion exchange capacity and improving the vanadium resistance of rare earth; and meanwhile, the catalyst has high activity and high activity stability. The rare-earth-containing Y molecular sieve prepared by the method disclosed by the invention can be used as an acidic component in the catalyst in the process of converting heavy fraction oil into light oil, and is especially applicable to a catalyst in a hydrocracking and catalytic cracking process.

Description

technical field [0001] The present invention relates to a preparation method of Y molecular sieve, more specifically, it relates to a preparation method of rare earth-containing Y molecular sieve. Background technique [0002] Modified Y molecular sieve (REY) containing rare earth (RE) ions is one of the most commonly used effective components in hydrocracking and catalytic cracking reaction catalysts today. In the cracking reaction, due to the deposition of metals such as nickel and vanadium on the catalyst, the activity of the catalyst decreases, the consumption of the catalyst increases, and the operating cost increases greatly. In order to reduce the pollution of nickel and vanadium, it is hoped to fundamentally develop a molecular sieve catalyst with strong resistance to heavy metal pollution. [0003] The vanadium species deposited on the surface of the molecular sieve decomposes in an oxidizing atmosphere to form oxygen-containing vanadium ions, which further react t...

Claims

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Application Information

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IPC IPC(8): C01B39/24B01J29/08
Inventor 王海涛马涛徐学军王继锋刘东香冯小萍
Owner CHINA PETROLEUM & CHEM CORP
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