Sulfuration type catalyst and preparation thereof

A catalyst and vulcanization technology, applied in the field of vulcanization catalyst and its preparation, can solve the problems of high processing cost, flammability, complex process, etc., and achieve the effects of saving start-up time, improving performance and simple production process

Inactive Publication Date: 2008-10-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The in-vessel vulcanization method is to put the oxidized catalyst into the hydrogenation reactor, and pass hydrogen and vulcanizing agent into the reactor during the heating process for pre-sulfurization. The disadvantages of this method are: long vulcanization time, high vulcanization cost, The vulcanizing agent is highly toxic and flammable, which is easy to cause pollution to people and the environment
The disadvantage of this method is that the process is complicated and the preparation cost is high
[0010] To sum up, some of the technologies reported in the current literature are still in the stage of laboratory exploration, and further research is needed for large-scale implementation. Although the other part has been successfully applied in industry, the process is complicated and the processing cost is high.

Method used

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preparation example Construction

[0019] The preparation method of the sulfurized catalyst of the present invention can adopt the following three specific processes.

[0020] 1. Impregnating the active metal first, and then treating it with a vulcanizing agent solution.

[0021] (1) dissolving Group VIII and Group IVB metal inorganic salts in an acidic or alkaline solution to form a solution of the desired concentration;

[0022] (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;

[0023] (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;

[0024] (4) The material obtained in step (3) is dried at 20-200° C. for 1-10 hours, and then treated at 200-350° C. for 1-1...

Embodiment 1

[0036] The preparation of embodiment 1 catalyst carrier

[0037] 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.

Embodiment 2

[0038] The preparation of embodiment 2 sulfurized catalyst B

[0039] 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 rate of 74ml / 100g, spray and impregnate the carrier A, dry at 120°C for 3 hours to obtain a dry sample, take the same amount of ammonium sulfide and phosphoric acid (85%) as the soaking solution and spray the dried sample together, (NH 4 ) 2 S and H 3 PO 4 The mass ratio of catalyst B is 10:1. After drying at 100°C for 3 hours, heat treatment at 250°C for 3 hours, catalyst B is obtained. The main physical properties are shown in Table 1.

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Abstract

The present invention relates to a sulfide type catalyst and a preparation method thereof, pertaining to the technical field of hydrogenation catalyst preparation. The method provided by the invention uses a dipping method to induce the required categories and quantity of active metals with a sulfide agent induced before, after or simultaneously and then obtains the final sulfide type catalyst by thermal treatment. The method provided by the present invention solves the defects of high preparation cost, long sulfide time and high operation cost of a normal oxidized catalyst. The catalyst prepared by the method of the present invention is suitable for an oil fraction hydrogenation process; therefore, the hydrogenation activity of the prepared catalyst can reach or surpass the effect of the normal catalyst.

Description

technical field [0001] The invention relates to a sulfurized catalyst and a preparation method thereof, which belongs to the improvement of a hydrogenation catalyst preparation method. 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 Group VIII and Group IVB metals or metal oxides with hydrogenation functions and supports and additives with certain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/20B01J27/04
Inventor 徐黎明高玉兰曹凤兰李崇惠陈光
Owner CHINA PETROLEUM & CHEM CORP
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