Method for producing ethylene cracking material by hydrogenation of liquefied gas

An ethylene cracking and liquefied gas technology, which is applied in the processing of gas mixtures, hydrocarbon oil treatment products, and hydrocarbon oil treatment, etc., can solve the problems of high olefin content, fast coke deposition in the catalyst bed, affecting the service life of the catalyst in one pass, etc. To achieve the effect of controlling the reaction speed and realizing the conversion rate

Active Publication Date: 2019-12-13
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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Problems solved by technology

This method solves the C 4 The stability of the distillate hydrogenation process solves the problem that the olefin content in the hydrocoked gasoline obtained from the coker gasoline hydrogenation unit is high, and it is difficult to meet the quality requirements of steam cracking raw materials
However, in actual industrial installations, when the olefin content in the liquefied petroleum gas feedstock is high (35v%-50v%), the problem that the hot spot temperature (or temperature bulb) is too high will easily cause the catalyst bed to deposit carbon quickly has not yet been solved. be better resolved, thereby affecting the single-pass service life of the catalyst

Method used

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  • Method for producing ethylene cracking material by hydrogenation of liquefied gas
  • Method for producing ethylene cracking material by hydrogenation of liquefied gas
  • Method for producing ethylene cracking material by hydrogenation of liquefied gas

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Effect test

Embodiment １

[0050] The reaction adopts a fixed-bed reactor and feeds upwards. The catalyst is loaded in four stages, along the flow direction of the material, and filled in equal volume proportions. From top to bottom, the catalysts are A, B, C, and D in sequence. The reaction process does not adopt a staged hydrogen intake scheme. Hydrogen and liquefied gas raw materials enter the reactor from the inlet of the first reaction section. The physical properties of the catalyst used in the reaction are shown in Table 2. The catalyst needs to be vulcanized during use, and the vulcanization operation is carried out by a conventional vulcanization method in the art, so no further details are given. The reaction conditions and results are shown in Table 4. The amount of coke deposited in each section of the catalyst bed after operation is shown in Table 5.

Embodiment 2

[0052] The reaction adopts a fixed-bed reactor, and feeds from above; the catalyst is loaded in four stages, along the flow direction of the material, and filled in equal volume proportions. From top to bottom, the catalysts are A, B, C, and D in sequence. The reaction is divided into four stages to feed hydrogen, and the amount of hydrogen fed to each stage of the bed is respectively: the amount of hydrogen entering the first catalyst bed in the first stage is 30v% of the chemical hydrogen consumption required for the reaction, and the amount of hydrogen entering the second catalyst bed in the second stage The amount of hydrogen in the bed is 30v% of the chemical hydrogen consumption required for the reaction, the amount of hydrogen entering the third catalyst bed in the third stage is 30v% of the chemical hydrogen consumption required for the reaction, and the fourth stage enters the fourth catalyst bed The amount of hydrogen is 50v% of the chemical hydrogen consumption requ...

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Abstract

The invention discloses a method for producing an ethylene cracking material through liquefied gas hydrogenation. The method is characterized in that liquefied gas and hydrogen pass through a hydrogenation reactor through a cocurrent flowing mode, then are contacted with a hydrogenation catalyst under hydrogenation technical condition and subjected to a reaction; the hydrogenation reactor comprises more than two reaction segments, and according to a contact sequence with a reaction material, the activity of the catalyst in a downstream reaction segment is higher than the activity of the catalyst in an upstream reaction segment. The method reduces the relative average reaction speed at an entrance of a catalyst bed layer, changes problem of large relative average reaction speed at the entrance of the catalyst bed layer, a difference of the average reaction speed of each segment of the catalyst bed layer is greatly reduced, and the relative average reaction speed of each segment of the catalyst bed layer is more uniform.

Description

technical field [0001] The invention relates to a method for producing ethylene cracking material by hydrogenation of liquefied gas, in particular, a method for hydrogenation of liquefied gas by adopting a catalyst gradation packing method. Background technique [0002] With the development of oil refining industry, especially the continuous improvement of catalytic cracking technology, people pay more and more attention to the deep processing of refinery gas. There are many ways to utilize refinery gas, among which hydrogenation of liquefied gas is one of the topics that people generally pay attention to. Liquefied petroleum gas can be used for many purposes after hydrogenation, such as ethylene raw material, raw material for the synthesis of maleic anhydride, and liquefied gas for vehicles. Among them, liquefied petroleum gas is used as ethylene raw material because of its large amount and involves many production devices, so it is prepared attention. [0003] As far as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G70/02
CPCC10G70/02C10G2400/20
Inventor 徐彤艾抚宾乔凯祁文博袁毅
Owner CHINA PETROLEUM & CHEM CORP
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