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Preparation method of non-supported high-activity hydrogenation catalyst

A hydrogenation catalyst and high-activity technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of low catalytic activity and achieve high specific surface area , Large pore volume, high hydrogenation activity

Active Publication Date: 2014-06-18
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the disadvantages of low catalytic activity of non-supported hydrogenation catalysts prepared by existing methods, and provide a method for preparing non-supported hydrogenation catalysts with high catalytic activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 19.6g of nickel nitrate, 18.3g of ammonium metatungstate, 9.2g of ammonium molybdate, and 160g of water to prepare a uniformly dispersed acidic solution. The molar ratio of the sum of nickel to molybdenum and tungsten in the acidic solution is 0.46, and its pH is measured =4.5, weigh 200g of silica sol as an alkaline solution, measure its pH=11.0, slowly mix the two into the precipitation reactor, and carry out co-precipitation reaction at a temperature of 80°C and a pH value of 8.0; Aging for 4 hours; suction filtration and washing until pH2 / g, pore volume 0.35cm 3 / g, the average pore diameter is 6.0nm.

Embodiment 2

[0027] Weigh 24.4g of nickel nitrate, 15.9g of ammonium metatungstate, and 160g of water to prepare a uniformly dispersed acidic solution. The molar ratio of VIII group non-noble metals to VIB group metals in the acidic solution is 0.26. Measure its pH=4, weigh 84.7g of sodium metaaluminate and 115g of water are prepared into a uniformly dispersed alkaline solution, and its pH=12.0 is measured. The two are slowly mixed into the precipitation reactor, and the coprecipitation reaction is carried out at a temperature of 90°C and a pH value of 9.0; precipitation reaction After the end, it was aged at 90°C for 4 hours; filtered and washed until the pH of the washing water was 2 / g, pore volume 0.31m 3 / g, the average pore diameter is 6.8nm.

Embodiment 3

[0029]Weigh 23.2g of nickel nitrate, 270.9g of ammonium molybdate, and 150g of water to prepare a uniformly dispersed acidic solution. The molar ratio of VIII group non-noble metals to VIB group metals in the acidic solution is 0.26. Measure its pH=5.5 and weigh 200g Colloidal silicon dioxide is used as an alkaline solution, and its pH is measured to be 10.0. The two are slowly mixed into the precipitation reactor, and the co-precipitation reaction is carried out at a temperature of 80°C and a pH value of 7.5; after the precipitation reaction is completed, it is aged at 100°C for 4 hours; Filter and wash until the washing water pH2 / g, pore volume 0.31cm 3 / g, average pore diameter 5.5nm.

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Abstract

The invention relates to a preparation method of a non-supported high-activity hydrogenation catalyst. The preparation method of the non-supported high-activity hydrogenation catalyst is characterized by comprising the following steps: preparing an acid solution A containing at least one group VIII metal compound and at least one group VIB metal compound, and an alkali solution B containing at least one silicon source or aluminium source, slowly mixing the two solutions into a sedimentation reactor, carrying out co-precipitation reaction to obtain slurry under the conditions that temperature is 20-120 DEG C and pH value is 7-12, and carrying out ageing, suction filtration, washing, drying, moulding and roasting on the slurry, so that a catalyst with high catalytic performance for hydrogenation reaction of a fixed bed is obtained. The prepared non-supported hydrogenation catalyst has large specific surface area, high pore volume and high hydrogenation activity; meanwhile, the preparation method of the non-supported high-activity hydrogenation catalyst is simple, reaction conditions are mild, and operation is easy and stable, so that the preparation method of the non-supported high-activity hydrogenation catalyst is applicable to industrial batch-type production.

Description

technical field [0001] The invention relates to the technical field of hydrogenation catalysts, in particular to a preparation method of a non-supported high-activity hydrogenation catalyst. It is a non-supported catalyst obtained by co-precipitation reaction of metal ions and non-metal ions to obtain a catalyst particle with nanopores and a high specific surface area, and then shaped. Compared with traditional supported catalysts, this The catalyst has a higher catalytic hydrogenation activity. Background technique [0002] As we all know, hydrogenation process is one of the most effective means of improving oil quality, and hydrogenation catalyst is the most important and key technology in hydrogenation process. Therefore, many petroleum and petrochemical companies at home and abroad are currently committed to improving the existing Improvement of hydrogen catalysts, efforts to develop better performance of hydroprocessing catalysts. [0003] Conventional hydrotreating c...

Claims

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Application Information

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IPC IPC(8): B01J23/888B01J23/883C10G49/04
Inventor 耿姗于海斌张景成张玉婷南军朱金剑张国辉肖寒李孝国
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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