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Preparation method of spherical catalyst carrier

A catalyst carrier and spherical technology, which is applied in the direction of catalyst carrier, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of stickiness of cylindrical strips, poor rheology, non-compliance with environmental protection requirements, complicated ball forming process, etc. problem, to achieve good hole expansion effect, increase the ratio, and increase the yield

Active Publication Date: 2013-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] CN1085594A discloses a kind of wax material hydrogenation refining catalyst, with Mo, Ni as active components, the preparation process of this catalyst: neutralize the silica-alumina mixed sol after low-temperature aging with ammonia water, after filtering, washing, with phosphoric acid and nitric acid Peptization, and then forming through the oil ammonia column, the carrier is formed through the oil ammonia column, the ball forming process is complicated, and there is the problem of ammonia nitrogen pollution, which does not meet the requirements of environmental protection
The adhesion and rheological properties of the cylindrical strips extruded through the cylindrical orifice are not good, resulting in low molding efficiency

Method used

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Examples

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Effect test

preparation example Construction

[0026] During the preparation process of the spherical catalyst carrier, the silicon source can be added in any step of mixing the alumina precursor, the gemini surfactant, and the adhesive, and the boron source can be added after the above materials are uniformly mixed.

[0027] The properties of the above-mentioned spherical catalyst carrier are as follows: the specific surface area is 200-350m 2 / g, preferably 250-300m 2 / g, the pore volume is 0.5~1.0cm 3 / g, preferably 0.60-0.90 cm 3 / g, the average pore diameter is 6-20nm, preferably 7-12nm, the amount of infrared acid is 0.20-0.80mmol / g, preferably 0.30-0.70mmol / g, and the mechanical strength is ≥35.0 N / grain.

Embodiment 1

[0030] Weigh 200g of pseudo-boehmite powder (containing Al( OH ) 3 ， Concentrated nitric acid is 34.4wt%, water is 30.6wt%) and a mixture of gemini surfactants (N, N'-dimethylcarboxybetaine is 4 grams), then add 6.5 grams of boric acid dissolved in 100ml of 50 ℃ water, Fully mix, knead into a plastic shape and extrude into a strip (the diameter of the strip orifice is 1.9mm). Then it was pre-dried in a drying oven at 30°C for 0.35 hours, cut into balls by a spherical granulator, dried at 110°C for 3 hours, and roasted at a constant temperature of 600°C for 3.0 hours to obtain a spherical hydrogenation catalyst carrier.

Embodiment 2

[0032] Take 200g of pseudo-boehmite powder (containing Al(OH) 3 ） , and then add 6.5 grams of boric acid dissolved in 100ml of 70°C water, mix thoroughly, knead into a plastic shape and extrude into strips (the diameter of the strip orifice is 2.1mm). It was then pre-dried in a drying oven at 40° C. for 0.3 hours. After cutting and pelletizing by a spherical granulator, drying at 110° C. for 4 hours, and constant temperature roasting at 600° C. for 4.0 hours, the spherical hydrogenation catalyst carrier was made.

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PUM

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Abstract

The invention discloses a preparation method of a spherical catalyst carrier. According to the method, a spherical size stabilization method is adopted for preparation, and a gemini surfactant is added into an aluminum oxide precursor, so that the physical properties of the surface of an aluminum oxide carrier are improved, the adhesion and rheology of materials during the carrier forming process are regulated, the plastic deformation of the carrier after forming is reduced, the yield of the spherical carrier is greatly improved, the strength of the spherical carrier is improved, and the proportion of complete particles in the spherical carrier is improved. In addition, the gemini surfactant is adopted, so that Na<+>, Ca<2+>, K<+>, Cl<->, Br<->, F<->, I<-> and other negative and positive hetero ions can not be introduced; and furthermore, the gemini surfactant is larger in molecular weight and good in reaming effect.

Description

technical field [0001] The invention relates to a method for preparing a spherical catalyst carrier, in particular to a spherical hydrogenation catalyst carrier. The method can be used for the catalyst carrier of petroleum wax hydrotreating, and can also be used for the hydrotreating catalyst carrier of heavy distillate oil, and is especially suitable for reactors with large aspect ratio and small reactor diameter. Background technique [0002] In recent years, with the increasing reduction and inferiority of high-waxy crude oil resources, the shortage and inferiority of paraffin resources have been caused; at the same time, the increase in domestic paraffin production and the increase in market demand have resulted in the processing of inferior paraffin and high-melting point waxes. The demand is increasing; while the requirements of environmental protection regulations are becoming increasingly stringent, the production and use of catalysts are required to be as pollution-...

Claims

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Application Information

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IPC IPC(8): B01J32/00B01J35/08B01J21/04B01J21/12
Inventor 张艳侠袁胜华张皓王鼎聪段日
Owner CHINA PETROLEUM & CHEM CORP
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