Operation-starting method of sulfurized hydrogenation catalyst

A hydrogenation catalyst, sulfurized technology, applied in physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc. Simple process and the effect of saving start-up time

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: long vulcanization time, high vulcanization cost, high toxicity and flammability of the vulcanizing agent, which is easy to cause pollution to people and the environment
The preparation process of the supported catalyst requires nitrogen protection, the process is complicated, the preparation cost is high, and it is not conducive to large-scale industrial production, and the hydrogenation activity of the catalyst needs to be improved
Moreover, the literature does not mention the start-up plan of sulfurized catalysts.

Method used

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  • Operation-starting method of sulfurized hydrogenation catalyst

Examples

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preparation example Construction

[0030] The preparation method of the sulfurized hydrogenation catalyst of the present invention can specifically adopt the following three specific processes.

[0031] 1. Impregnating the active metal first, and then treating it with a vulcanizing agent solution.

[0032] (1) dissolving Group VIII and Group IVB metal inorganic salts in an acidic or alkaline solution to form a solution of the desired concentration;

[0033] (2) impregnating the catalyst carrier with the solution prepared in step (1) by a saturated impregnation method or an excess impregnation method, and drying at 20-200° C. for 1-10 hours;

[0034] (3) impregnating the material obtained in step (2) with a vulcanizing agent aqueous solution using a saturated impregnation method or an excessive impregnation method; the pH value of the solution can be adjusted to 4 to 11 to make the vulcanization reaction complete;

[0035] (4) The material obtained in step (3) is dried at 20-200° C. for 1-10 hours.

[0036] 2....

Embodiment 1

[0047] a) Preparation of catalyst support

[0048] Take by weighing 900g of pseudo-boehmite (produced by Shandong Aluminum Oxidation Factory, dry basis is 73%), 19g of scallop powder, 32g of citric acid, 48ml of nitric acid (30%), 159ml of silica gel (containing 30% of silicon dioxide), remove 250ml of deionized water was mixed evenly, extruded into 1.2mm clover strips on an extruder, and roasted at 600°C for 3 hours to obtain carrier A. The main physical properties are shown in Table 1.

[0049] b) Preparation of sulfurized hydrogenation catalyst B

[0050] Weigh 28.48g of molybdenum oxide, 8.9g of basic nickel carbonate, add 60ml of deionized water and mix well, add 4ml of 85% phosphoric acid, heat to 75°C, and keep the temperature for 1 hour to obtain a dark green clear and transparent solution, then add 30.2g of partial tungsten Stir the ammonium acid to obtain the impregnating solution 1 after dissolving. Measure the soaking solution 1 according to the water absorption ...

Embodiment 2

[0054] a) Preparation of sulfurized hydrogenation catalyst C

[0055] Get impregnation solution 1 and ammonium sulfide among the embodiment 1 and press water absorption rate 74ml / 100g and flow spray impregnation carrier A, the volume ratio of impregnation solution 1 and ammonium sulfide is 1: 1, promptly obtains catalyst C in 100 ℃ of drying 3 hours, The main physical properties are listed in Table 1.

[0056] b) The catalyst start-up method and evaluation are the same as in Example 1. See Table 2 for the evaluation results.

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Abstract

The invention relates to an operation-starting method of a sulfurized hydrogenation catalyst. The method comprises the following steps: putting the sulfurized hydrogenation catalyst into a reactor; then pumping inert gases to replace the air in the reactor and pipes in front of and at the back of the reactor and gradually raising the temperature to the activation temperature; and pumping hydrogen to replace the inert gases, adjusting the pressure and temperature to the reaction pressure and temperature after the airflow is stable and putting raw oil to begin hydrogenation. The method overcomes the defects of high preparation cost, long presulfurization time and high operation cost of the conventional oxidized catalysts. The method has the following advantages: the catalyst prepared by the method dispenses with presulfurization and has simple preparation process and operation-starting method; concentrated heat release during operation starting can be suppressed by adopting the inert gases to activate the catalyst; the method is suitable for preparing catalysts for hydrogenation of petroleum fractions; and the hydrogenation activity of the catalyst prepared by the method is superior to that of the conventional catalysts.

Description

technical field [0001] The invention relates to a start-up method of a sulfurized hydrogenation catalyst, which belongs to the improvement of the start-up method of the hydrogenation catalyst. Background technique [0002] In recent years, the trend of poor quality of crude oil in the world has become increasingly obvious, the content of sulfur, nitrogen and aromatics in petroleum products is increasing day by day, and the requirements for environmental protection in various countries are also getting higher and higher. It is obvious that there is a contradiction between the increasingly stringent environmental protection requirements and this reality More and more sharp; hydrogenation process is one of the effective means to produce clean oil, and hydrogenation catalyst is the key technology of this process. [0003] Hydrogenation catalysts are generally composed of VIII and VIB metals or metal oxides with hydrogenation functions and supports and additives with certain acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G49/04C10G45/08B01J27/051B01J27/049B01J37/20
Inventor 徐黎明高玉兰李崇慧陈光
Owner CHINA PETROLEUM & CHEM CORP
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