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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, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex process start-up and other problems, and achieve the effect of high yield and high isomerization selectivity.

Active Publication Date: 2018-11-02
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

[0027] The present invention provides a method for preparing a hydrodewaxing catalyst, the method comprising: a. first impregnating a molecular sieve-inorganic oxide carrier with an ammonium salt solution and drying to obtain an impregnated carrier; wherein the molecular sieve has a A molecular sieve with a one-dimensional elliptical pore structure, the minor axis of the one-dimensional elliptical pore structure is The major axis of the one-dimensional elliptical hole structure is The ratio of the ammonium salt to the molecular sieve-inorganic oxide carrier is 0.01-0.2 mol / 100 g, preferably 0.02-0.05 mol / 100 g; b, mixing the hydrogenation active metal salt with water to obtain the hydrogenation-containing A solution of an active metal salt; using at least one selected from ammonia, ammonium carbonate and urea to adjust the pH of the solution containing the hydrogenation active metal salt to 10.0-12.0 to obtain an impregnating solution; c. The obtained impregnated support is...

specific Embodiment approach

[0030] 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.

[0031] According to the method of the present invention, the ammonium salt in step a may be an inorganic ammonium salt, such as at least one selected from ammonium nitrate, ammonium chloride,...

Embodiment 1

[0043] Describe the catalyst provided by the invention and its preparation method.

[0044] 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 molar ratio of silicon to aluminum of ZSM-22 molecular sieve is 55. Gained molecular sieve 100 grams to contain 20% by weight NH 4 NO 3 1000 ml of the solution was treated at 90° C. for 4 hours, filtered, and treated 3 times with the above method. Dry the treated molecular sieve at 120° C. for 4 hours to obtain hydrogen ZSM-22 molecular sieve.

[0045] Mix the hydrogen...

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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 an ammonium salt solution, and carrying out drying so as to obtain an impregnated carrier, wherein the ratio of ammonium salt to the molecular sieve-inorganic oxide carrier is 0.01 to 0.2 mol / 100 grams; b, mixing hydrogenation active metal salt with water so as to obtain a solution containing the hydrogenation active metal salt, and adjusting the pH value of the solution containing the hydrogenation active metal salt to 10.0 to 12.0 by adopting at least one selected from the group consisting of ammonia water, ammonium carbonate and urea so as to obtain an impregnating solution; and c, subjecting the impregnated carrier obtained in the step a to second impregnation with the impregnating solution obtained in the step b so as to obtain the hydrodewaxing catalyst. 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王鲁强郭庆洲夏国富
Owner CHINA PETROLEUM & CHEM CORP
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