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Hydrogenating catalyst for petroleum wax and its preparation process

A technology of hydrogenation catalyst and petroleum wax, which is applied in the refining of petroleum wax, which can solve the problems of catalyst cost increase, complicated preparation process, pollutant discharge, etc., and achieve suitable surface acidity and acidity, simple preparation process, and concentrated pores distribution effect

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

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Problems solved by technology

Catalyst preparation method is also in P 2 o 5 -SiO 2 -Al 2 o 3 W-Ni solution is impregnated on the carrier, because its carrier preparation process (prepared by CN 1032408C method) is complicated and has a large amount of pollutants to discharge in the preparation process, causes environmental pollution and the raising of catalyst cost

Method used

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  • Hydrogenating catalyst for petroleum wax and its preparation process
  • Hydrogenating catalyst for petroleum wax and its preparation process

Examples

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preparation example Construction

[0022] 1. Preparation of silicon and phosphorus aluminum hydroxide

[0023] In the preparation process of aluminum hydroxide containing silicon and phosphorus of the present invention, the concentration of the sodium metaaluminate solution used is 5gAl 2 o 3 / l~60gAl 2 o 3 / l. The silicon-containing compound is preferably an acidified sodium silicate (commonly known as water glass) solution, or a sodium silicate solution, so that the aluminum hydroxide is easy to dissolve Na + Washing can also be a low-sodium silica sol solution, and the silicon dioxide contained in the silicon-containing compound solution is adjusted to be 5g / l-40g / l. Acidified water glass is prepared by adding an acidic solution such as dilute hydrochloric acid solution or nitric acid solution to the water glass solution to prepare a clear, transparent and fluid acidified water glass solution, which is conducive to the high dispersion of silicon-containing compounds in the gel-forming system. 1 to 3; th...

Embodiment 1

[0037] (1) Preparation of silicon and phosphorus aluminum hydroxide

[0038] 1) Solution preparation

[0039] 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 low-sodium silica sol solution; prepare ammonium dihydrogen phosphate solution with a concentration of 5.0gP / l.

[0040] 2) into glue

[0041] 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 c...

Embodiment 2

[0048] (1) Preparation of silicon and phosphorus aluminum hydroxide

[0049] Compare with embodiment 1 (1), be mixed with the phosphoric acid solution containing phosphorus 8.0g / l, slurries add phosphoric acid solution and carry out peptization, aging 1.0 hour then, all the other are identical with embodiment 1 (1), obtain containing silicon and Phosphorous Aluminum Hydroxide Product B1.

[0050] (2) The preparation of the silicon- and phosphorus-containing alumina support is the same as in Example 1 (2).

[0051] (3) The preparation of the catalyst is the same as in Example 1 (3). That is, the cost example obtains product B of the present invention.

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Abstract

The invention discloses a petroleum wax hydrogenation catalyst and its preparing method, adopting the Si- and P- containing aluminum hydroxide prepared by CO2 netur neutralization process to act as a carrier material of catalyst, where the Si and P auxiliaries are added in steps, some Si- and P- containing compounds mix with sodium meta-aluminate solution to form a glue, some Si-containing compounds are added after the glue is formed or in the ageing process, and most P-containing compounds are added in the process of peptizing or pulping the produced aluminum hydroxide after washed, thus making most Si and P are distributed on the surface of aluminum hydroxide, effectively give full play to the Si and P cooperatively regulating surface physico-chemical property and hole structure of the catalyst. Its preparing process is simple and low-cost. It has good activity and selectivity as processing petroleum waxes including high-melting point petroleum wax.

Description

technical field [0001] The invention relates to a hydrorefining catalyst and a preparation method thereof, in particular to a petroleum wax hydrorefining catalyst with large average pore size, highly concentrated pore distribution and high activity and a preparation method thereof. Background technique [0002] The main component of paraffin wax raw material is normal paraffin, and the content of isoparaffin is very low. However, the content of isoparaffins in the microcrystalline wax raw material is much higher than that in the paraffin wax raw material, and its composition carbon number is higher. Microcrystalline wax raw materials have the following properties: small crystals, high melting point, high viscosity in molten state, good oil retention, high oil content, high content of sulfur, nitrogen and condensed ring aromatics. The purpose of petroleum wax hydrofinishing is to retain the paraffin wax components, remove carcinogens such as condensed ring aromatic hydrocarb...

Claims

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Application Information

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