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Method for preparing sulfide type catalyst

A catalyst and vulcanization-type technology, which is applied in the field of preparation of vulcanization-type catalysts, can solve the problems of affecting the hydrogenation activity of catalysts, the inability to use hydrogenation devices, and complicated process flows, so as to save start-up time, improve performance, and simplify the production process Effect

Active Publication Date: 2010-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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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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  • Method for preparing sulfide type catalyst

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preparation example Construction

[0019] The preparation method of the sulfurized catalyst of the present invention prepares the sulfide precursors of Group VIB metal Mo and W, the inorganic salt of Group VIII metal Ni or Co and complexing agent into a solution, and loads it on the catalyst carrier by impregnation method , and then heat-treated to obtain the final sulfurized catalyst.

[0020] 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.

[0021] A kind of specific preparation method of sulfurized catalyst of the present invention is as follows:

[0022] 1. Preparation of catalyst carrier: Prepare the catalyst carrier by conventional methods, and select the carrier type according to the number of acid sites required by the catalyst, such...

Embodiment 1

[0026] The preparation of embodiment 1 sulfurized catalyst A

[0027] Take by weighing pseudo-boehmite (produced by Shandong Alumina 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) Silica 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]Dissolve nickel nitrate and EDTA in ammonia water to obtain a transparent solution, mix it with ammonium thiomolybdate solution and ammonium thiotungstate to form a solution, and determine the amount of active components in the solution according to the data in Table 1. The mixed solution was sprayed and impregnated with carrier 1, dried at 120°C for 3 hours to obtain dry sample 1, and then calcined at 220°C for 6 hours to obtain catalyst A. The main physical properties are shown in Table 1.

Embodiment 2

[0029] The preparation of embodiment 2 sulfurized catalyst B

[0030] Get nickel nitrate and DTPA to be dissolved in deionized water to obtain a transparent solution, add dimethyl sulfoxide in the above-mentioned transparent solution, and the addition is 5% (volume ratio) of the total solution, then ammonium thiomolybdate is dissolved in this solution to prepare Form an impregnating solution, and the amount of active components in the impregnating solution is determined according to the data in Table 1. Take the impregnating solution to spray and impregnate carrier 1, dry at 120°C for 3 hours to obtain dry sample 1, and then roast at 320°C for 1 hour to obtain catalyst B. The main physical properties are shown in the attached table.

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Abstract

The invention relates to a method for preparing a sulfide type catalyst, which adopts dipping solution to dip a needed catalyst carrier to obtain the sulfide type catalyst through drying and heat treatment. The method for preparing the sulfide type catalyst is characterized in that: the dipping solution contains the sulfide precursor of metal Mo or W and the complex of Ni or Co inorganic salt at the same time. The method overcomes the defects of high preparation cost, long vulcanizing time and high operation cost of the conventional oxidation state catalyst. The catalyst prepared by the method of the invention is applied to the preparation of petroleum distillate hydrogenation catalyst, and the hydrogenation activity of the catalyst prepared by the method exceeds the effect of the 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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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/02B01J37/08B01J27/051C10G45/08
Inventor 徐黎明高玉兰曹凤兰李崇惠陈光
Owner CHINA PETROLEUM & CHEM CORP
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