Hydrogenating refining catalyst for petroleum wax stuff and its preparation process

Active Publication Date: 2005-03-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the wet gel is peptized, phosphoric acid is introduced to eliminate the strong acid center of the carrier and reduce the total acid content; the carrier can only be prepared into a spherical carrier through the formation of an oily ammonia column, and the process of forming a ball is complicated. A

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] (1), the preparation of silicon-containing aluminum hydroxide comprises the following steps:

[0027] a, prepare sodium metaaluminate solution, its concentration is 5gAl 2 O 3 / l~60gAl 2 O 3 / l; prepare silicon-containing compound solution, preferably sodium silicate solution (commonly known as water glass), and its concentration is 5gSiO 2 / l~40gSiO2 2 / l.

[0028] b. Under stirring conditions, mix sodium metaaluminate solution, a part of silicon-containing compound solution (the amount added accounts for 0% to 50% of the total added weight) with a concentration of 10v% to 50v% (preferably 20v% to 40v %) of carbon dioxide gas reacts to form a gel, and the raw material solution or slurry is mixed and passed into carbon dioxide gas to form a gel, or one or two of them are continuously added to form a gel while passing through carbon dioxide, and stop passing when the pH value is 9 to 12 carbon dioxide, then aged and filtered. The gelling temperature described ther...

Embodiment 1

[0045] (1) Preparation of silicon-containing aluminum hydroxide

[0046] Set the concentration to 30gAl 2 O 3 / l of sodium metaaluminate solution is placed in the gel-forming tank, the temperature is controlled at 20°C, and the concentration is 20gSiO 2 / l sodium silicate solution, stir evenly, add sodium silicate as SiO 2 The content calculated in the silicon-containing aluminum hydroxide is 2.0% by weight, and the carbon dioxide gas with a concentration of 30v% is introduced until the pH value of the slurry is 11. The carbon dioxide gas is stopped, and the slurry is aged for 0.5hr under stirring, and then carried out Filter, add deionized water to the filter cake and re-pulp and stir, and then add the remaining part of the calculated amount of sodium silicate solution to make the silicon-containing compound with SiO 2 The final content calculated in silicon-containing aluminum hydroxide is 8.0wt%, then aged for 0.5 hours, filtered, washed 4 times, so that the carrier cont...

Embodiment 2

[0053] (1) the preparation of silicon-containing aluminum hydroxide is identical to that of Example 1 (1);

[0054] (2) the preparation of the alumina carrier containing silicon and phosphorus composite auxiliary agent is identical with embodiment 1 (2);

[0055] (3) Preparation of catalyst

[0056] Compared with (3) in Example 1, increasing WO in the solution 3 concentration such that in the final catalyst, on an oxide weight basis, WO 3 The content is 25.6%; the NiO content is 7.6%. Reduction of MoO in molybdenum-boron solution 3 content, so that the MoO in the final catalyst 3 Content is 6.5%, all the other are identical with (3) among the embodiment 1. The final catalyst product B is obtained.

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Abstract

The invention discloses a petroleum wax hydrofining catalyst and its preparing method, using Wu, Mo and Ni (or Co) as active metals and using the aluminum oxide containing Si and P auxiliaries to act as a carrier and its preparing method: it dips the aluminum oxide carrier in the Wu-Ni/Co water solution and the Mo-B water solution, respectively, so as to make it. The aluminum oxide carrier is prepared by using the Si-containing aluminum hydroxide prepared by CO2 neutralization process and then adding in the P-containing compound in the forming process. Its preparing process is simple and low-cost. The invention can effectively regulate the physico-chemical property of a catalyst by the cooperative regulation of the two compound auxiliaries, making the catalyst have reasonable aperture structure and proper surface acidic property. This catalyst can process the petroleum waxes including high-melting point petroleum wax and produce food-grade petroleum wax products.

Description

technical field [0001] The invention relates to a hydrorefining catalyst and a preparation method thereof, in particular to a petroleum wax hydrorefining catalyst and a preparation method thereof. Background technique [0002] The purpose of wax hydrorefining is to retain the basic composition of normal alkanes, remove carcinogens such as condensed ring aromatics represented by 3,4-benzopyrene, and non-hydrocarbon sulfur, nitrogen and oxygen. In order for the wax molecules to fully carry out chemical reactions in the active center of the catalyst, the catalyst must have a large specific surface, large pore volume and unimpeded pores to provide an ideal reaction site for the reactants and product molecules. In addition, the paraffin hydrofining process is a highly selective reaction process, which can remove impurities such as sulfur, nitrogen and oxygen in the raw wax and hydrogenate unsaturated components such as condensed ring aromatics. At the same time, this process doe...

Claims

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Application Information

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IPC IPC(8): C10G73/44
Inventor 袁胜华苏晓波张皓赵愉生付泽民
Owner CHINA PETROLEUM & CHEM CORP
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