Method for purifying materials containing metal impurities

A technology for metal impurities and materials, applied in the field of heteroatom purification, can solve the problems of improved iron removal effect, increased bed pressure drop, and too fast pressure drop of catalyst bed, etc.

Active Publication Date: 2012-12-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN1323873A adopts solid inert fiber material, operates under the condition of hydrogen, and the iron removal rate has been improved, but the reaction temperature is higher, and the iron removal effect needs to be further improved
In CN2465800 and CN2671682, catalysts with spongy honeycomb holes inside the particles are installed on the top of the hydrogenation catalyst bed, but this method only alleviates the problem of excessive pressure drop of the catalyst bed, and does not fundamentally solve the bed pressure problem. up and down problem

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  • Method for purifying materials containing metal impurities
  • Method for purifying materials containing metal impurities

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Gasoline fraction iron removal process.

[0023]During the processing process, the gasoline fraction is polluted by iron impurities, the content of which is 32 μg / g in terms of iron element, the flash gas (low fraction gas) of the low-pressure separator is the low fraction gas of the catalytic cracking gasoline hydrotreating unit, and the volume content of hydrogen sulfide is 3.4%, the pressure is 0.7MPa. Experimental schemes 1-1 and 1-2 use a catalyst, which is the residual oil hydrogenation protection agent FZC-102 (Raschig ring, diameter 5mm) developed and produced by Fushun Petrochemical Research Institute. Embodiments 1-3 use alumina particles (Raschig ring, outer diameter 5mm, inner diameter 2.5mm, height 6mm, diameter of the most probable pore of alumina is 15nm). Experimental schemes 1-4 are the same alumina particles as schemes 1-3, and the alumina particles contain 2wt% potassium oxide. Adopt the inventive method to process, specifically according to the att...

Embodiment 2

[0027] Diesel fraction iron removal process.

[0028] Diesel fractions contain iron impurities and are contaminated by iron impurities during processing. The iron content is 85 μg / g. The flash gas (low fraction gas) of the low-pressure separator is the low fraction gas and hydrogen sulfide of the catalytic cracking diesel hydrotreating unit. The volume content is 6.5%, the pressure is 1.0MPa, and the catalyst adopts residual oil hydrogenation protection agent FZC-101 (seven-hole ring, outer diameter 16mm), FZC-102 (Raschig ring, diameter 5mm) developed and produced by Fushun Petrochemical Research Institute. ), the volume ratio is 1:2, packed in layers, the diesel raw material is first contacted with FZC-101, then with FZC-102, and processed by the method of the present invention, specifically according to the attached figure 1 Process operation. In the comparative example, the operating conditions are the same as those of the experimental mode 2-1, except that instead of usi...

Embodiment 3

[0032] Demetallization process of vacuum distillate oil (distillation range 379~540℃).

[0033] The content of various impurities is 12 μg / g of iron, 25 μg / g of calcium, and 22 μg / g of sodium. The flash gas (low fraction gas) of the low-pressure separator is the low fraction gas of the vacuum distillate oil hydrocracking unit, and the volume content of hydrogen sulfide is 5.1%, the pressure is 1.5MPa, the catalyst adopts residual oil hydrogenation protection agent FZC-100 (seven-hole ball, outer diameter 16mm), FZC-101 (seven-hole ring, outer diameter 16mm) developed and produced by Fushun Petrochemical Research Institute, FZC-102 (Raschig ring, diameter 5mm), the volume ratio is 1:2:2, packed in layers, the diesel raw material is firstly contacted with FZC-100, and then with FZC-101 and FZC-102, using the method of the present invention processing, according to the attached figure 2 Process operation. The specific conditions and results are shown in Table 3.

[0034] Tabl...

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Abstract

The invention relates to a method for purifying materials containing metal impurities, in particular to a method for removing at least one metal impurity of iron, sodium and calcium from hydrocarbon materials, which comprises that the materials containing metal impurities are mixed with flash gas (low grade gas) in a low-pressure separator of a hydrogenation unit to obtain the materials with a higher impurity removal rate by a fixed bed layer of filtering materials, absorbent or catalyst. Compared with the prior art, the method in the invention has mild operation conditions and high impurity removal rate, and can be used in processing various materials containing metal impurities.

Description

technical field [0001] The present invention relates to a purification method for removing heteroatoms from metal impurity materials, in particular to a demetallization purification method for metal impurity materials such as iron, sodium or calcium, especially for removing iron, sodium or calcium from hydrocarbon materials Demetallization purification method for metal impurity materials. Background technique [0002] Hydrocarbon materials, such as various mineral hydrocarbon materials, often contain various heteroatoms, such as sulfur, nitrogen, oxygen and various metals. The removal of various heteroatoms is an important part of hydrocarbon processing, and many processing processes are aimed at removing these heteroatoms, such as hydrodesulfurization, hydrodenitrogenation, and hydrodemetallization. Other non-hydrocarbon substances, such as various solvents and other chemical products, may also contain similar metal impurities. [0003] Iron is a common and very special t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G25/00
Inventor 方向晨关明华梁相程周勇王震
Owner CHINA PETROLEUM & CHEM CORP
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