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Zeolite containing catalytic dewaxing catalyst

A catalytic dewaxing and catalyst technology, applied in the direction of physical/chemical process catalysts, catalyst carriers, petroleum wax recovery, etc., can solve the problem of low selectivity and achieve the effect of increased selectivity and increased yield

Inactive Publication Date: 2003-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcoming of the low selectivity of existing catalytic dewaxing catalysts and provide a catalytic dewaxing catalyst containing zeolite with higher selectivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] This example illustrates the preparation and properties of high silica zeolite containing rare earth five-membered ring structure.

[0024] Prepare REY and REHY seed crystals according to Example 1 in CN1020269C, and prepare high-silica zeolite containing rare earth five-membered ring structure according to Example 4 of CN1020269C to obtain high-silica zeolite Z1 containing rare earth five-membered ring structure. The composition of the high silica zeolite Z1 containing the rare earth five-membered ring structure is listed in Table 3. The n-hexane adsorption capacity and the cyclohexane adsorption capacity and the weight ratio of the n-hexane adsorption capacity and the cyclohexane adsorption capacity are listed in Table 4. The main X-ray diffraction lines of the high-silica zeolite Z1 containing the rare earth five-membered ring structure are listed in Table 5.

[0025] Among them, the sodium oxide content is determined by atomic absorption spectrometry. The contents of ra...

example 2

[0033] This example illustrates the preparation and properties of high silica zeolite containing rare earth five-membered ring structure.

[0034]Prepare REY and REHY seed crystals according to Example 1 in CN1020269C, and prepare high-silica zeolite containing rare earth five-membered ring structure according to Example 12 of CN1020269C to obtain high-silica zeolite Z2 containing rare earth five-membered ring structure. The composition of the high silica zeolite Z2 containing the rare earth five-membered ring structure is listed in Table 3. The n-hexane adsorption capacity and the cyclohexane adsorption capacity and the weight ratio of the n-hexane adsorption capacity to the cyclohexane adsorption capacity are listed in Table 4. The main X-ray diffraction lines of the high silica zeolite Z2 containing the rare earth five-membered ring structure are listed in Table 5.

[0035] Instance number

Zeolite

serial number

Composition, weight%

Silicon oxide and ox...

example 3

[0039] This example illustrates the preparation of the catalyst provided by the present invention.

[0040] 45 grams (dry basis weight) prepared in Example 1 containing rare earth five-membered ring structure high silica zeolite Z1, 55 grams (dry basis weight) aluminum hydroxide powder (product name is Changling dry rubber powder, Changling Refinery Catalyst Factory Produced) and 75 grams of deionized water are mixed uniformly, kneaded, and then extruded into a cylindrical bar with a diameter of 1.8 mm, dried at 120°C, and calcined at 550°C for 4 hours to obtain a zeolite-containing carrier S1. S1 contains 45% by weight of rare earths. Five-membered ring structure high silica zeolite Z1 and 55% by weight alumina. S1 was impregnated with 43 ml of nickel nitrate solution in which 4 g of nickel nitrate was dissolved, dried at 120°C, and calcined at 500°C for 4 hours to obtain the catalyst C1 provided by the invention. The composition of catalyst C1 is listed in Table 6. The catalyst ...

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Abstract

The dewaxing catalyst contains one kind of zeolite carrier and hydrogenating metal component, and the zeolite is one kind of RE containing high-silicon zeolite in five membered ring structure and hassilica / alumina molar ratio of 20-100, RE oxide content in 0.1-2.5 wt% and sodium oxide content of 0.1-1.5 wt%. The zeolite has special X-ray diffraction spectrum line and relatively high selectivity.

Description

Invention field [0001] The present invention relates to a catalytic dewaxing catalyst, more specifically, to a catalytic dewaxing catalyst containing zeolite. Background technique [0002] To produce products with good flow properties at low temperatures from waxy feedstock oils, such as lubricating oil, jet fuel, and low-pour-point diesel, dewaxing is necessary. Wherein, the wax refers to linear or lightly branched hydrocarbon compounds, such as linear or lightly branched long chain alkanes, long chain alkyl aromatic hydrocarbons and long chain alkyl cycloalkanes. [0003] The traditional dewaxing method is the solvent dewaxing process. The main disadvantage of this process is the high operating cost. Another dewaxing method is the catalytic dewaxing method, which is to contact the waxy feedstock oil with hydrogen in the presence of a zeolite-containing catalytic dewaxing catalyst to selectively crack or isomerize the wax molecules to achieve dewaxing the ...

Claims

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Application Information

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IPC IPC(8): B01J32/00C10G73/02
Inventor 孟宪波康小洪王奎
Owner CHINA PETROLEUM & CHEM CORP
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