Hydrogenating and condensation point depressing catalyst and its preparing method

A technology for depressurizing pour point by hydrogen and catalyst, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of reducing catalyst acidity, high preparation cost and high energy consumption, and achieves improved performance and good effect. , the effect of reducing energy consumption

Active Publication Date: 2009-06-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this method uses high-temperature roasting of the catalyst carrier to reduce the acidity of the catalyst, and the high-temperature roasting temperature is 700°C to 830°C, resulting in high energy consumption and high preparation costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Catalyst Preparation

[0031] 8.3g of ammonium metatungstate and 3.9g of nickel nitrate were mixed, ground into a powder of more than 160 mesh, and mixed with 37.3g of small-pore alumina (specific surface 238m 2 g-1 , pore volume 0.48mL·g -1 ) mix evenly, add 1.5mol / L, 56mL nitric acid aqueous solution and stir to be prepared into binder, and 67gHZSM-5 molecular sieve (dry basis 97wt%), manufacturer: Catalyst Factory of Tianjin Nankai University, SiO 2 / Al 2 o 3 molar ratio=38) mixed together, kneaded, extruded, dried at 130°C for 4 hours, calcined at 580°C for 4 hours, impregnated (preparation of impregnation solution: 15.8g nickel nitrate, 1.1g potassium nitrate dissolved in 100mL water), dried at 130°C Calcined for 4 hours at 580°C for 4 hours to obtain a catalyst whose properties are shown in Table 1.

[0032] 2. Process evaluation

[0033] Daqing minus first line (see Table 2 for the properties of raw materials) was used as the raw material oil. The test w...

Embodiment 2

[0035] 1. Catalyst preparation

[0036] 4.8g ammonium heptamolybdate and 3.9g nickel nitrate are mixed, are ground into the powder of more than 160 orders, and the small hole aluminum oxide (specific surface 238m 2 g -1 , pore volume 0.48mL·g -1 ) mix evenly, add 1.5mol / L, 56mL nitric acid aqueous solution and stir to be prepared into binder, and 69.1gHZSM-5 molecular sieve (dry basis 97wt%), manufacturer: Catalyst Factory of Tianjin Nankai University, SiO 2 / Al 2 o 3 molar ratio=38) mixed together, kneaded, extruded, dried at 130°C for 4 hours, calcined at 580°C for 4 hours, impregnated (preparation of impregnation solution: 7.9g nickel nitrate, 1.1g potassium nitrate dissolved in 100mL water), dried at 130°C Calcined for 4 hours at 580°C for 4 hours to obtain a catalyst whose properties are shown in Table 1.

[0037] 2. Process evaluation

[0038] Process conditions are the same as in Example 1, and the process evaluation results are shown in Table 4.

Embodiment 3

[0040] 1. Catalyst Preparation

[0041] 7.15g of ammonium metatungstate and 5.85g of nickel nitrate were dissolved in 56mL of nitric acid aqueous solution with a concentration of 1.5mol / L, mixed evenly with 31.3g of small-pore alumina with a dry basis content of 67wt%, and prepared as a binder, and mixed with 72.2gHZSM -5 molecular sieve (97wt% on a dry basis, manufacturer: Tianjin Nankai University Catalyst Factory, SiO 2 / Al 2 o 3 =38) mixed together, kneading, extruding, drying, roasting conditions are the same as in Example 1, impregnating (impregnation solution preparation: 3.95 nickel nitrate, 9.8gLiNO 3 be dissolved in 100mL water), drying and roasting conditions are the same as in Example 1 to obtain the catalyst, and its properties are shown in Table 1. The process evaluation results are shown in Table 4.

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Abstract

The invention discloses a hydro dewaxing catalyst and the preparation method. In the method, compound with hydrogen active component is mixed with aluminum dry gel to prepare adhesive; and then the adhesive is mixed with shape-selective cracked zeolite and is pinched in shape; after drying and roasting, catalyst carrier is yielded; then the catalyst carrier is impregnated in the impregnating solution containing the rest active component and promoter; and after drying and roasting again, the catalyst of the invention is yielded. The invention is capable of taking full advantage of the alumina used as adhesive in the catalyst carrier under low hydrogen active component content conditions to prepare adhesive containing all the molybdenum and tungsten and part of the nickel, thereby keeping a certain amount of nickel oxide in the zeolite. The rest of the active metal component is distributed in the alumina, keeping the zeolite passage unobstructed with good hydro dewaxing effect and effectively improving the hydrogen addition and purification performance of the catalyst. The catalyst is especially suitable for hydro dewaxing of raw material containing wax and with high nitrogen impurity content and suitable for hydrogen addition and purification.

Description

technical field [0001] The invention relates to a hydrogenation dewaxing catalyst and a preparation method thereof, in particular to a diesel hydrodewaxing catalyst and a preparation method thereof. The catalyst is used in the process of hydrodecondensation of waxy hydrocarbon raw materials, and is especially suitable for the process of hydrodecondensation and hydrofinishing of waxy raw materials. Background technique [0002] "Hydrodecondensation" means the reduction of the wax molecule content of a waxy hydrocarbon feedstock on the surface of a suitable catalyst in the presence of hydrogen. The principle of dewaxing is that under certain operating conditions, the raw material is mixed with hydrogen and contacted with the hydrogen decondensation catalyst. High freezing point components such as aromatics are selectively cracked into small molecules, while other components are basically unchanged, and the purpose of lowering the freezing point of the oil is finally achieved....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/076B01J29/072C10G45/12C10G45/08
Inventor 高鹏孟祥兰李永泰于庆新郭晓明
Owner CHINA PETROLEUM & CHEM CORP
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