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Preparation method of vulcanized catalyst

A catalyst, sulfurized technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems that affect the hydrogenation activity of catalysts, cannot use hydrogenation devices, and complex process flow, etc. The effect of saving start-up time, improving vulcanization and simple production process

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 disadvantage of this patent is that the catalyst needs to be roasted in a protective gas, and the processing cost is high
and the formation of MoS first 2 and WS 2 After the formation of NiS and CoS, it is not conducive to the formation of the active phase of Co-Mo(W)-S or Ni-Mo(W)-S, which affects the hydrogenation activity of the catalyst
[0005] To sum up, the technology reported in the current literature requires inert gas or hydrogen protection during the catalyst preparation process, the process is complicated, and the processing cost is high, so it cannot be used in large-scale hydrogenation units.
The hydrogenation activity of the catalyst needs to be improved

Method used

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  • Preparation method of vulcanized catalyst

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preparation example Construction

[0018] The preparation method of the sulfurized catalyst of the present invention prepares the sulfide precursors of Group VIB metal Mo and W and the inorganic salt of Group VIII metal Ni or Co into a solution, adds additives to the impregnation solution, and uses the impregnation method to load it onto the catalyst carrier, and then dried to obtain the final sulfurized catalyst.

[0019] In the preparation process of the sulfurized catalyst of the present invention, the impregnation method is a conventional method in the field, such as dissolving the required metal salt in an aqueous solution with an appropriate pH value, and then impregnating by means of saturated impregnation or excessive impregnation.

[0020] A kind of specific preparation method of sulfurized catalyst of the present invention is as follows:

[0021] 1. Preparation of catalyst carrier: Prepare the catalyst carrier by conventional methods, and select the carrier type according to the number of acid sites r...

Embodiment 1

[0026] The preparation of embodiment 1 sulfurized catalyst A

[0027] Take by weighing pseudo-boehmite (produced by Shandong Aluminum Oxidation Plant, 73% by weight on a dry basis) 900g, 19g of scallop powder, 32g of citric acid, 48ml of nitric acid (30% by weight), silica gel (containing two by weight) Silicon oxide 30%) 159ml, deionized water 250ml mix evenly, extrude into 1.2mm clover strips on extruder, after drying, bake at 600 ℃ for 3 hours, obtain the required catalyst carrier 1.

[0028] Take ammonium thiomolybdate solution (containing molybdenum oxide 30g / 100ml) to impregnate carrier 1 and dry at 180°C, take nickel nitrate solution (containing nickel oxide 5.2g / 100ml) and add glycine in an amount of 2g / 100ml, mix well The obtained catalyst precursor was impregnated and dried at 180° C. for 3 hours to obtain catalyst A. The exothermic results are shown in Table 1.

Embodiment 2

[0029] The preparation of embodiment 2 sulfurized catalyst B

[0030]Take ammonium thiomolybdate solution (containing molybdenum oxide 30g / 100ml) to impregnate carrier 1 and then dry at 180°C, take nickel nitrate solution (containing nickel oxide 5.2g / 100ml) and add acetamide ethanol solution, the amount of acetamide added is 2g / 100ml, mix evenly, impregnate the obtained catalyst precursor, and dry at 180°C for 3 hours to obtain catalyst B. The exothermic results are shown in Table 1.

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Abstract

The invention relates to a preparation method of a vulcanized catalyst, comprising the following steps: dipping a required catalyst carrier by a dipping solution, and drying to obtain the vulcanized catalyst, wherein the dipping solution contains a sulfide precursor of metal Mo or W, an inorganic salt of Ni or Co and an organic auxiliary. The auxiliary is added into the dipping solution, thereby reducing the phenomenon of centralized heat emission during the start working procedure. The method in the invention has simple preparation process, inert gas protection is not required during the preparation procedure, category-II active phases with high catalytic activity are easy to form, and the usability of the catalyst is high. The catalyst prepared according to the method in the invention is suitable for the preparation of petroleum fraction hydrogenation catalysts, and the hydrogenation activity of the catalyst prepared by the method is higher than that of a conventional catalyst.

Description

technical field [0001] The invention relates to a method for preparing a sulfurized catalyst, in particular to a method for preparing a sulfurized hydrogenation catalyst using a solution containing a metal sulfide precursor. Background technique [0002] Conventional hydrogenation catalysts are in an oxidized state, but the active substances are in a sulfurized state in actual use, so they need to be sulfurized in the reactor before use. This not only increases the production cost, but also the vulcanization process is likely to cause pollution to people and the environment, so researchers at home and abroad are actively seeking solutions. The current research mainly focuses on two aspects: one is presulfurization outside the device, and the other is the direct preparation of sulfurized catalysts. External presulfurization refers to the introduction of vulcanizing agent into the pores of the oxidized catalyst by sublimation, melting or impregnation, and then the catalyst is...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J27/049
Inventor 徐黎明高玉兰李崇慧陈光
Owner CHINA PETROLEUM & CHEM CORP
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