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

A hydrodewaxing and catalyst technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high gas yield, low base oil yield, and large loss of viscosity index, etc., to achieve Effect of high isomer selectivity and high yield

Active Publication Date: 2021-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Disadvantages of this method are high gas yield, low yield of base oil and large viscosity index loss

Method used

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

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preparation example Construction

[0026] The present disclosure provides a method for preparing a hydrodewaxing catalyst, the preparation method comprising: a. First impregnating the molecular sieve-inorganic oxide carrier with a solution containing a hydrogenation active metal salt, followed by drying, roasting and reduction in sequence, A supported catalyst is obtained; 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. impregnating the supported catalyst obtained in step a with an aqueous solution of a nitrogen-containing compound for a second time and drying to obtain a hydrodewaxing catalyst.

[0027] The inventors of the present disclosure unexpectedly found that the acid strength of some active centers of the hydrodewaxing catalyst can be changed by impregnating the aqueous solution of nitrogen-containing compounds...

specific Embodiment approach

[0031]According to a specific embodiment of the present disclosure, 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.

[0032] According to the present disclosure, the hydrogenation active metal salt can be soluble salt containing hydrogenation active metal commonly used in the art, for example, it can be selected from nitr...

Embodiment 1

[0045] Catalysts provided by the present disclosure and methods for their preparation are described.

[0046] 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 (SO 4 ) 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 wa...

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Abstract

The present disclosure provides a preparation method of a hydrodewaxing catalyst, the catalyst prepared by the method and the application of the catalyst, the method comprising: a. carrying out a molecular sieve-inorganic oxide carrier with a solution containing a hydrogenation active metal salt The first impregnation followed by drying, calcining and reduction 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 elliptical pore structure is the The long axis is b. The supported catalyst obtained in step a is impregnated with an aqueous solution of a nitrogen-containing compound for a second time and dried to obtain a hydrodewaxing catalyst. Applying the catalyst prepared by the disclosed method to the hydrodewaxing process not only improves the selectivity of the catalyst, but also can more effectively reduce the pour point of the heavy lubricating oil base oil and maintain a higher yield of the target product .

Description

technical field [0001] The disclosure relates to a preparation method of a hydrodewaxing 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 compone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/74C10G73/02C10G45/64
CPCB01J29/7484B01J2229/18B01J2229/40C10G45/64C10G73/02C10G2300/1037
Inventor 黄卫国李洪宝毕云飞王鲁强郭庆洲夏国富
Owner CHINA PETROLEUM & CHEM CORP
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