Regeneration method of desulfurization adsorbent

An adsorbent and adsorption desulfurization technology, which is applied in separation methods, filter regeneration, filtration separation, etc., can solve the problems of no regenerated desulfurization adsorbent and high consumption of adsorbent, and achieve the effect of solving the problem of recycling and simple process

Active Publication Date: 2005-07-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem in the adsorption process is that the consumption of adsorbent is relatively high, for example, the consumption of adsorbent required for processing 1 ton of diesel oil is 10kg
[0008] So far, there is no report on regeneration of desulfurization adsorbent with water vapor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This example illustrates the preparation of the nickel-based amorphous alloy adsorbent used in the present invention.

[0024] Add 1.2kg of nickel and 1.5kg of aluminum into a graphite crucible with a nozzle at the bottom, heat it in a high-frequency furnace to above 1300°C to melt and alloy it. Spray the alloy liquid from the nozzle at the bottom of the crucible onto a copper roller with a rotating speed of 670 rpm. Cooling water is passed through the copper roller. After rapid cooling, the alloy liquid is thrown out along the tangent of the copper roller to form scaly strips, scale The strips were ground to a particle diameter of less than 70 microns to obtain the master alloy.

[0025] The master alloy was subjected to constant temperature heat treatment at 700°C for 3 hours in a hydrogen atmosphere. The heat-treated master alloy was slowly added into a three-neck flask filled with 500 g of 20% sodium hydroxide aqueous solution, and the temperature was controlled at...

Embodiment 2-5

[0028] These examples illustrate the preparation of nickel-based amorphous alloy adsorbents useful in the present invention.

[0029] Adsorbent-2 to Adsorbent-5 with different compositions used in the method of the present invention were prepared according to the steps of Example 1. Their compositions are listed in Table 1.

[0030] Table 1

[0031] Example Sorbent number Sorbent composition

[0032] 1 Adsorbent-1 Ni 92 Al 8

[0033] 2 Adsorbent-2 Ni 76 Mo 17 Al 7

[0034] 3 Adsorbent-3 Ni 52 Fe 40 Al 8

[0035] 4 Adsorbent-4 Ni 77 co 17 Al 6

[0036] 5 Adsorbent-5 Ni 89 Cr 2.2 Al 8.8

Embodiment 6-15

[0038] These examples illustrate the implementation effect of the regeneration method provided by the present invention under different operating conditions.

[0039]Examples The catalytic diesel oil that has been removed by hydrodesulfurization to remove most of the sulfide is used as the raw material for adsorption desulfurization, and its basic properties are as follows: density 0.8642g / cm 3 , Distillation range 155-365°C, sulfur content 109ppm.

[0040] The adsorption operation process is as follows: 10 grams of adsorbent with an average particle size of 60 microns is placed in a fixed-bed reactor with an inner diameter of 14 mm, an outer diameter of 20 mm, and a length of 550 mm, heated to the adsorption temperature (250 ° C), and the above-mentioned Diesel feedstock is fed at a certain flow rate (the weight space velocity is 10h -1 ) into the reactor from the top of the reactor. High-resolution gas chromatography-atomic emission spectrometry detector (GC-AED) was used ...

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Abstract

This invention relates to fuel oil absorption desulfuration nickel base non-crystal alloy absorption regeneration method, which makes water steam contact with the agent with one to ten litre water per hour per kilometer for half to three hours in temperature of 100 to 500 degrees and under pressure of the common one to the 0.5 Mpa. The method is suitable for activity deducing to the initial activity half or even lower agent and after regeneration, the agent can recover more than 90 úÑ to total or partly substitutes the fresh absorption agent.

Description

technical field [0001] The invention relates to a regeneration method of a desulfurization adsorbent. More specifically, the present invention relates to a method for regenerating a nickel-based amorphous alloy adsorbent whose activity has been reduced during adsorption and desulfurization of fuel oil. technical background [0002] With the increasingly stringent requirements of environmental protection on the quality of gasoline and diesel, people are increasingly restricting the sulfur content in fuel oil. Some countries have proposed to use gasoline and diesel with lower sulfur content. For example, the new formula gasoline implemented in California, USA in 1996 required the sulfur content to be no more than 40 μg / g; the European Union’s gasoline sulfur content limit in 2000 was 150 μg / g, and the directional index for gasoline sulfur content in 2005 was no more than 50 μg / g. There are also corresponding regulations on the sulfur content of diesel oil. At present, many c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34C10G25/12
Inventor 曾小军张晓昕宗保宁慕旭宏孟祥堃
Owner CHINA PETROLEUM & CHEM CORP
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