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Preparation method of spherical catalyst carrier

A catalyst carrier, spherical technology, applied in the direction of catalyst carrier, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of non-compliance with environmental protection requirements, poor adhesion and rheology, low molding efficiency, etc., to achieve The effect of increasing the ratio, improving physical properties, and reducing plastic deformation

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 catalyst for hydrorefining of wax, with Mo and Ni as active components. The preparation process of the catalyst: neutralize with ammonia water after aging at low temperature The silicon-aluminum mixed sol is filtered and washed, peptized with phosphoric acid and nitric acid, and then formed through an oily ammonia column, and the carrier is formed through an oily ammonia column. The ball forming process is complicated, and there is ammonia nitrogen pollution, which does not meet the environmental protection requirements.
The cylindrical strips extruded from the above-mentioned materials through the cylindrical orifice have poor adhesion and rheological properties, 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, anionic surfactant, cationic surfactant, and adhesive, and the boron source can be added after the above materials are evenly 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 7-10nm, 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 / mm.

Embodiment 1

[0030] Weigh the pseudo-boehmite powder (containing Al(OH)) prepared by 200g carbonization method 3 <3wt%), add 16.0 grams of water glass, 9.5 grams of sodium polyacrylate and 15.0 grams of polyethylene glycol to obtain a mixture containing the precursor of alumina, to 16 grams of adhesive (wherein small hole alumina is 30.5wt%, concentrated nitric acid 37.5wt%, water: 32.0wt%), add 2.0 grams of sodium octadecyltoluene sulfonate, mix well, and then add 3.5 grams of cetyltrimethylammonium bromide to obtain a surfactant-containing adhesive Mixture, then the adhesive mixture containing surfactant was added to the mixture containing the alumina precursor, and then 6.5 grams of boric acid dissolved in 100ml of 50°C water was added. Mix well, knead into a plastic shape and extrude into bars. (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...

Embodiment 2

[0032] Get the pseudo-boehmite powder (containing Al( OH ) prepared by 200g carbonization method 3 < 3wt %), 20.0 grams of silica sol, 10.0 grams of methyl cellulose and 3.0 grams of scallop powder are mixed, then add 5.0 g of sodium dodecylbenzenesulfonate, after mixing evenly, add 20 grams of adhesive (wherein the pores are oxidized Aluminum is 25.5wt%, concentrated phosphoric acid is 40.0wt%, water: 34.5wt%) and 3.8 grams of cetyltrimethylammonium chloride, then add 6.5 grams of boric acid dissolved in 100ml of 70°C water. Mix well, knead into a plastic shape and extrude into bars. (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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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 an anion surfactant and a cation surfactant are 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.

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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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J21/12B01J21/18C10G45/00
Inventor 张艳侠张皓袁胜华段日
Owner CHINA PETROLEUM & CHEM CORP
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