Catalytic dewaxing catalyst and its preparation thereof

A catalytic dewaxing and catalyst technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low liquid yield and poor activity, and achieve the reduction of pour point and cloud point, dewaxing selection sex enhancing effect

Active Publication Date: 2008-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The selectivity of the catalyst has been improved, but the activity is poor and the liquid yield is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Describe the catalyst provided by the invention and its preparation method.

[0030] With 60 grams (dry basis weight) ZSM-5 molecular sieve (Changling Oil Refinery Catalyst Factory product, average grain size is about 80 nanometers, the mol ratio of silicon oxide and aluminum oxide is 32) and 189.2 grams of alumina powder (Changling Refinery catalyst factory products, dry basis 74% by weight) mixed, then extruded into cylindrical bars of Φ1.4 mm, wet bars were dried in air at 120°C for 4 hours, and roasted at 560°C for 4 hours to make catalyst carrier Z1.

[0031] Get 150 grams of carrier Z1, contact it with a mixed medium containing an aqueous solution of 1.0% by weight of tri-n-butylamine and air at 450°C for 8 hours, the ratio of the aqueous solution to the carrier is 1.0 g / g·hour, and the ratio of the air to the carrier is 1.0 L / g·hour. The contact is carried out in a 150 ml catalyst activation device, wherein the aqueous solution containing 1.0% by weight of tri-n...

Embodiment 2

[0034] Describe the catalyst provided by the invention and its preparation method.

[0035] With 150 grams (dry basis weight) ZSM-5 molecular sieve (Changling Oil Refinery Catalyst Factory product, average grain size is about 90 nanometers, the mol ratio of silicon oxide and aluminum oxide is 118) and 64.1 grams of alumina powder (Changling Refinery catalyst factory products, dry basis 78% by weight) mixed, then extruded into cylindrical bars of Φ1.4 mm, wet bars were dried in air at 120 ° for 4 hours, and roasted at 500 ° C for 6 hours to make catalyst carrier Z2.

[0036] Get 150 grams of carrier Z2, and contact it with a mixed medium containing an aqueous solution of 2.5% by weight of tetraethylammonium hydroxide and air at 480°C for 4 hours, the ratio of the aqueous solution to the carrier is 0.5 g / g·hour, and the ratio of the air to the carrier The ratio is 2.0 liters / gram·hour.

[0037] Get 98.8 grams of treated carrier Z2, use nickel nitrate [Ni(NO 3 ) 2 ·6H 2 0] im...

Embodiment 3

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

[0040] With 120 grams (dry basis weight) ZSM-5 molecular sieve (Changling Oil Refinery Catalyst Factory product, average grain size is about 55 nanometers, the mol ratio of silicon oxide and aluminum oxide is 84) and 108.1 grams of alumina powder (Changling Refinery catalyst factory product, dry basis 74% by weight) mixed, then extruded into a cylindrical bar with a diameter of 1.4 mm, the wet bar was dried in air at 120° for 4 hours, and roasted at 580° C. for 3 hours to make catalyst carrier Z3.

[0041] Take 120 grams of carrier Z3, treat it with an aqueous solution containing 3.2% by weight of triethylamine and air at 520°C for 2 hours, the ratio of the aqueous solution to the carrier is 2.5 g / g·hour, and the ratio of air to the carrier is 3.2 liters / gram·hour .

[0042] Get 96.5 grams of treated carrier Z3, and use nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O] impregnated with 62 milli...

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Abstract

The catalyst for catalyzing dewaxing process contains one carrier containing ZSM-5 molecular sieve and matrix, and one metal component with hydrogenating activity in the effective amount supported on the carrier. The preparation process of the catalyst includes one step of contacting the carrier containing ZSM-5 molecular sieve and matrix with mixed medium comprising water solution of organic amine and air, and one step of introducing metal component with hydrogenating activity to the carrier. The water solution of organic amine has organic amine content of 0.1-5 wt%, the ratio between the water solution and the carrier is 0.1-5 g/g.hr, and the ratio between the air and the carrier is 0.5-5 l/ g.hr. The catalyst is especially suitable for catalyzing dewaxing process of lubricating oil fraction.

Description

technical field [0001] The invention relates to a distillate oil catalytic dewaxing catalyst and a preparation method thereof. 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 components in the raw oil at a certain temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/42C10G73/02
Inventor 黄卫国康小洪刘广元夏国富聂红石亚华李大东
Owner CHINA PETROLEUM & CHEM CORP
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