Method for regenerating precious metal hydrogenation catalyst

A technology for hydrogenation catalysts and precious metals, which is applied in the field of regeneration of precious metal catalysts, and can solve the problems of long process and high cost

Active Publication Date: 2009-03-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the existing catalyst regeneration method, this method adds a new active component, thereby improving the performance of the catalyst, but this method can only be regenerated outside the reactor, and the process is long and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A noble metal hydrogenation catalyst for treating the C9+ fraction of pyrolysis gasoline is adopted, the active component of the catalyst is platinum / palladium bimetal, and the metal content is 0.5% by weight. The main purpose of this process is to remove dienes and some olefins in the raw oil while minimizing aromatics saturation. The hydrogenation process conditions are: hydrogen partial pressure 3.0MPa, volume space velocity 1.5h -1 , The reaction inlet temperature is 50°C, and the volume ratio of hydrogen to oil is 500:1. The properties of the raw oil are listed in Table 1, the comparison data of the oil produced before and after catalyst regeneration are listed in Table 2, and the comparison with the time required for the ordinary regeneration process is listed in Table 3.

[0016] The specific steps of regeneration are as follows: the device stops feeding raw oil, the amount of hydrogen fed remains unchanged, and the operating pressure remains unchanged. The temp...

Embodiment 2

[0028] Adopt noble metal hydrogenation catalyst in embodiment 1 to process pyrolysis gasoline C 6 ~C 8 Distillate, the main purpose of this process is also to remove dienes and some olefins in raw oil, while minimizing aromatics saturation. The main process conditions are: hydrogen partition pressure 2.5MPa, volume space velocity 2.0h -1 , The reaction inlet temperature is 52°C, and the volume ratio of hydrogen to oil is 600:1. The properties of raw oil are listed in Table 4, the comparison data of oil produced before and after catalyst regeneration are listed in Table 5, and the comparison with the time required for the ordinary regeneration process is listed in Table 6.

[0029] The regeneration steps are as follows: stop the device and feed the raw material oil, double the amount of hydrogen fed, keep the operating pressure constant, raise the temperature in the reactor to 230°C at 25°C / h, purge at constant temperature for 30 hours, and then lower the temperature back to ...

Embodiment 3

[0039] A noble metal hydrogenation catalyst for treating the C9+ fraction of pyrolysis gasoline is adopted, the active component of the catalyst is single palladium, and the palladium content is 1.5% by weight. The main purpose of this process is to remove dienes and some olefins in the raw oil while minimizing aromatics saturation. The hydrogenation process conditions are: hydrogen partial pressure 2.8MPa, volume space velocity 1.8h -1 , The reaction inlet temperature is 52°C, and the volume ratio of hydrogen to oil is 550:1. The properties of the raw oil are listed in Table 7, the comparison data of the oil produced before and after catalyst regeneration are listed in Table 8, and the comparison with the time required for the ordinary regeneration process is listed in Table 9.

[0040] The regeneration steps are as follows: stop the device and feed the raw material oil, double the amount of hydrogen fed, keep the operating pressure constant, raise the temperature in the rea...

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Abstract

The invention relates to a hydrogenation catalyst regeneration method for a light hydrocarbon noble metal, which comprises the following steps: the hydrocarbon feeding is firstly stopped by using a reactor, heating or heat-exchange equipment, and hydrogen in the hydrogenation process of the light hydrocarbon noble metal; and then the hydrogen is heated by the heating or heat-exchange equipment, so as to enter the reactor to contact an inactivating noble metal catalyst. The catalyst regeneration method is organically combined with a hydrogenation process for the light hydrocarbon, conducts the catalyst regeneration by fully using the conditions in the hydrogenation technology process, and has the advantages of simple process, low cost, short time and good regeneration effect, and can be applied in the regeneration process of hydrogenation catalyst of various light hydrocarbon noble metals.

Description

technical field [0001] The invention relates to a regeneration method of a noble metal hydrogenation catalyst, in particular to a regeneration method of a noble metal catalyst for hydrogenation of light hydrocarbon raw materials. Background technique [0002] Hydrogenation catalysts are divided into two categories: noble metals and non-noble metals. The hydrogenation activity of noble metal hydrogenation catalysts is much higher than that of non-noble metal hydrogenation catalysts, but the price is higher, and the requirements for the impurity content of raw oil are also higher. Therefore, noble metal hydrogenation catalysts are usually used in reactions with special needs, such as selective hydrogenation and other fields. [0003] With the prolongation of the operation cycle, the activity of the hydrogenation catalyst will gradually decline. When the product quality requirements cannot be met or the economy is unreasonable, the catalyst must be burnt and regenerated to res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/10B01J23/96
Inventor 徐大海李扬刘继华王震佟德群牛世坤李士才
Owner CHINA PETROLEUM & CHEM CORP
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