Silicon-phosphorus contained aluminum hydrate and its preparation

A technology of aluminum hydroxide and silicon phosphorus, which is applied in the direction of chemical instruments and methods, catalyst activation/preparation, refined hydrocarbon oil, etc., can solve the problems of unsuitable catalyst, pollutant discharge, poor peptization, etc., and achieve the reduction of production cost, The effect of easy molding and low cost

Inactive Publication Date: 2004-12-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] ZL94103999.4 discloses a method for preparing macroporous alumina containing silicon and phosphorus. In the preparation process of this alumina, silicon and phosphorus are added by step-by-step colloidal method, which can make silicon and phosphorus large Partially dispersed on the surface of alumina, but this alumina has large pores and poor peptization. In the preparation process of catalyst or carrier, only a part of the alumina containing silicon and phosphorus is mixed, and the rest is alumina with better peptization. Only in this way can it be smoothly formed; at the same time, it contains low silicon dioxide, only 1wt% to 4wt%, and contains more phosphorus, which will make the surface of the carrier weaker in acidity, and can be used for the preparation of hydrorefining catalysts, but not Suitable for the preparation of heavy oil hydroconversion catalysts or other catalysts that require conversion performance; the gelling process uses AlCl 3 、Al 2 (SO 4 ) 3 and Al(NO 3 ) 3 As a raw material, use ammonia water to neutralize gelation at a higher temperature, which will make its cost higher and a large amount of pollutants will be discharged

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Solution preparation

[0023] The preparation concentration is 30gAl 2 o 3 / l of sodium metaaluminate solution; add sodium silicate solution in dilute nitric acid solution, stir rapidly, and prepare acidified sodium silicate solution, so that the concentration of acidified sodium silicate solution is 20gSiO 2 / l, the pH value of the final solution is 1; the preparation concentration is 20.0gSiO 2 / l of low-sodium silica sol solution, prepare ammonium dihydrogen phosphate solution with a concentration of 10.0gP / l.

[0024] (2) into glue

[0025] Put the sodium metaaluminate solution in the gel-forming tank, control the temperature at 20°C, slowly add the acidified sodium silicate solution at a certain flow rate, stir quickly and evenly, and add the sodium silicate as SiO 2 The content calculated in aluminum hydroxide is 4.0% by weight, and the carbon dioxide gas with a concentration of 30% (volume concentration, the same below) is introduced until the pH value of...

Embodiment 2

[0027] (1) Compared with Example 1 (1), the phosphoric acid solution containing phosphorus 10.0g / l is prepared, and all the other are the same as Example 1 (1).

[0028] (2) Compared with Example 1 (2), phosphoric acid solution was added to the slurry for peptization, and then aged for 1.0 hour, and the rest were the same as Example (2), namely the cost example.

Embodiment 3

[0030] (1) Compared with Example 1 (1), it is formulated with phosphorus-containing 10.0g / l phosphoric acid and nitric acid solution, and all the other are the same as Example 1 (1).

[0031] (2) compare with embodiment 1 (2), do not add phosphorus-containing solution in gelling process, add phosphoric acid nitric acid solution to carry out peptization after gelling filter cake washing after filter cake slurrying, all the other and embodiment (2) ) is the same as the cost example.

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Abstract

An aluminium hydroxide particle containing Si and P dispersed on its surface is disclosed, which can be used for hydrorefining the fractional oil or preparing the hydrocatalyst. It is prepared by introducing the cheap Si-contained compound and P-contained compound in the process for preparing the alpha-AlO(OH) type aluminium hydroxide by Co2 method step by step. Its advantages are excellent physical and chemical properties, large pore volume and specific surface area, proper, surface acidity and better peptization.

Description

technical field [0001] The invention relates to a silicon-phosphorus-containing aluminum hydroxide and a preparation method thereof, in particular to a silicon-phosphorus-containing aluminum hydroxide with highly dispersed silicon and phosphorus additives on the surface of alumina and a large pore volume and a preparation method thereof. Background technique [0002] As we all know, in the preparation process of catalysts used in petroleum refining, alumina or γ-Al containing a small amount of one or more other elements such as Si, P, Ti, B, Mg, F, etc. are usually used 2 o 3 as the carrier. The performance of this type of hydrogenation catalyst depends largely on the performance of its alumina support, because the surface properties of the support directly affect the number and strength of active centers of the catalyst. Therefore, researchers and developers of this type of hydrogenation catalysts pay great attention to the development of catalyst support materials. Duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/188B01J32/00B01J37/03C10G45/12
Inventor 袁胜华苏晓波张皓付泽民
Owner CHINA PETROLEUM & CHEM CORP
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