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A preparation method of hydrodewaxing catalyst, catalyst prepared by the method and application of the catalyst

A hydrogenation dewaxing and catalyst technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex process start-up and achieve high yield and high isomerization selectivity.

Active Publication Date: 2019-02-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the catalyst is treated, it needs to be washed with clean raw materials to remove all polar compounds and aromatic compounds, so the process start-up process is relatively complicated

Method used

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  • A preparation method of hydrodewaxing catalyst, catalyst prepared by the method and application of the catalyst
  • A preparation method of hydrodewaxing catalyst, catalyst prepared by the method and application of the catalyst
  • A preparation method of hydrodewaxing catalyst, catalyst prepared by the method and application of the catalyst

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preparation example Construction

[0028] The invention provides a method for preparing a hydrodewaxing catalyst, the method comprising: a. first impregnating a molecular sieve-inorganic oxide carrier with a solution containing a hydrogenation active metal salt, followed by drying, roasting and reduction in sequence to obtain Supported catalyst; wherein, the molecular sieve is a molecular sieve with a one-dimensional elliptical pore structure, and the minor axis of the one-dimensional elliptical pore structure is The major axis of the one-dimensional elliptical hole structure is b. The supported catalyst obtained in step a is impregnated with water for the second time and dried to obtain a hydrodewaxing catalyst; wherein, the weight loss of the hydrodewaxing catalyst after roasting at 450°C for 4 hours is 0.2-5.0% by weight, preferably 0.5-2.0% by weight.

[0029] According to the method of the present invention, the weight loss refers to the ratio of the loss of catalyst weight before and after calcination ...

specific Embodiment approach

[0032] According to a specific embodiment of the method of the present invention, the preparation method of the molecular sieve-inorganic oxide carrier may be: mixing the molecular sieve with the matrix, extruding, drying and calcining. When forming by extrusion molding, an appropriate amount of extrusion aid and / or adhesive can be added, and then extruded. The type and amount of the extrusion aid and peptizer are well known to those skilled in the art, and will not be repeated here. The drying temperature is preferably 100-200°C, more preferably 120-150°C, and the drying time is preferably 1-20 hours, more preferably 2-10 hours. The calcination temperature is preferably 400-650°C, more preferably 500-600°C, and the calcination time is preferably 1-15 hours, more preferably 2-10 hours.

[0033] According to the method of the present invention, the hydrogenation active metal salt can be a soluble hydrogenation active metal salt commonly used in the art, for example, it can be ...

Embodiment 1

[0047] Describe the catalyst provided by the invention and its preparation method.

[0048] After mixing the organic template, the silicon source and the aluminum source, the crystallization was carried out in a stainless steel reaction kettle at 400 Rpm at 160° C. for 96 hours to obtain 100% ZSM-22 molecular sieve. Among them, the organic template is ethyl pyridinium bromide, and the aluminum source is Al 2 (SO4) 3 ·16H 2 O, the silicon source is silica sol (SiO 2 Content is 30% by weight), the SiO of feeding 2 / Al 2 o 3 60, H 2 O / SiO 2 40,OH - / SiO 2 0.3, K + / SiO 2 is 0.43, template / SiO 2 The silicon-aluminum molar ratio of ZSM-22 molecular sieve is 67. Gained molecular sieve 100 grams to contain 20% by weight NH 4 NO 3 1000 ml of the solution was treated at 80° C. for 4 hours, filtered, and treated 3 times in total by the above method. The treated molecular sieves were dried at 120° C. for 4 hours. The hydrogen ZSM-22 molecular sieve was obtained.

[0049...

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Abstract

The invention discloses a preparation method for a hydrodewaxing catalyst and a catalyst prepared by using the same, and an application of the catalyst. The method comprises the following steps: a, subjecting a molecular sieve-inorganic oxide carrier to first impregnation with a solution containing hydrogenation active metal salt, and successively carrying out drying, calcination and reduction so as to obtain a supported catalyst, wherein the molecular sieve is a molecular sieve with a one-dimensional elliptical pore structure, and the minor axis of the one-dimensional elliptic pore structure is 4.2-5.4 angstroms and the major axis of the one-dimensional elliptic pore structure is 5.4-7.0 angstroms; and b, subjecting the supported catalyst obtained in the step a to second impregnation with water, and carrying out drying so as to obtain the hydrodewaxing catalyst, wherein after the hydrodewaxing catalyst is subjected to calcination at 450 DEG C for 4 hours, the weight loss of the hydrodewaxing catalyst is 0.2 to 5.0 wt%. The catalyst prepared by using the method provided by the invention is applied in the process of hydrodewaxing, so the selectivity of the catalyst is improved; meanwhile, the pour point of heavy lubricant base oil can be effectively reduced; and a high target product yield is maintained.

Description

technical field [0001] The invention relates to a preparation method of a hydrogenation dewaxing catalyst, a catalyst prepared by the method and an application of the catalyst. Background technique [0002] Dewaxing is necessary to produce products with good fluidity at low temperature from waxy raw materials, such as lubricating oil, jet fuel, low freezing point diesel, etc. The wax mentioned therein refers to long-chain normal alkanes or long-chain hydrocarbon compounds with a small amount of short side chains, including long-chain alkanes with a small amount of short side chains, long-chain alkyl aromatics and long-chain alkyl cycloalkanes . The traditional dewaxing method uses the solvent dewaxing process, the main disadvantages of which are high operating costs, high energy consumption, and limited freezing point depression. Another dewaxing method is catalytic dewaxing, which uses the unique pores and appropriate acidity of molecular sieve catalysts to select the wax...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/74C10G73/02C10G45/64
Inventor 黄卫国李洪宝毕云飞高杰王鲁强郭庆洲夏国富
Owner CHINA PETROLEUM & CHEM CORP
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