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Method for prolonging service life of palladium catalyst of hydrogenation tower and hydrogenation tower system thereof

A technology of palladium catalyst and hydrogenation tower, applied in chemical instruments and methods, peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, chemical recovery, etc., can solve the problem of incomplete regeneration of palladium catalyst Impurity removal, degradation products cannot be effectively cleaned, and the activity level cannot be restored, so as to achieve the effect of improving regeneration effect, saving steam consumption, and extending regeneration cycle

Pending Publication Date: 2021-09-21
HANGZHOU MINGXIN HYDROGEN PEROXIDE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

2. Incomplete palladium catalyst regeneration cannot effectively remove the impurities adsorbed on the palladium catalyst, or cannot restore the activity level of the original palladium catalyst
The traditional regeneration method is the steam method, the single use of steam has poor regeneration effect, short service life, and the degradation products adsorbed on the palladium catalyst cannot be effectively removed

Method used

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  • Method for prolonging service life of palladium catalyst of hydrogenation tower and hydrogenation tower system thereof
  • Method for prolonging service life of palladium catalyst of hydrogenation tower and hydrogenation tower system thereof
  • Method for prolonging service life of palladium catalyst of hydrogenation tower and hydrogenation tower system thereof

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specific Embodiment

[0063] Among the three hydrogenation tower units, the uppermost hydrogenation tower unit is connected in series with the middle hydrogenation tower unit, and when the lowermost hydrogenation tower unit is in regeneration or standby state after regeneration, please refer to the description below for the switching status of the corresponding two-way valve :

[0064] The working fluid from the working fluid circulation pump 01 first passes through the primary working fluid filter 1 and then the secondary working fluid filter 2 to filter out solid impurities that may be entrained, and then passes through the opened two-way valve A, together with the hydrogenation fluid circulation pump. 02 and after the hydrogenated liquid that has passed through the circulating hydrogenated liquid filter 3 is mixed (at this time, the two-way valve B is opened), it is preheated to the required temperature through the working fluid preheater 4, and the two-way valves D, V, E, W, H and K are closed,...

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Abstract

The invention discloses a method for prolonging the service life of a palladium catalyst of a hydrogenation tower and a hydrogenation tower system thereof. The method for prolonging the service life of the palladium catalyst by using the hydrogenation tower system comprises the following steps: 1, filtering a working solution; 2, mixing with hydrogenation liquid, preheating by a working liquid preheater, and mixing with hydrogen; 3, inputting into a hydrogenation tower which consists of three sections of hydrogenation tower units, two sections of the three sections of hydrogenation tower units being in an up-and-down serial use state, and the other section being always in a regeneration state or a standby state after regeneration; 4, the working solution and hydrogen entering the hydrogenation tower sequentially enter two sections of hydrogenation tower units, then flowing out from the tower bottom of the hydrogenation tower units and entering a hydrogenation liquid gas-liquid separator; 5, hydrogenated liquid in the hydrogenated liquid gas-liquid separator being filtered and then entering a hydrogenated liquid storage tank; and 6, regenerating the palladium catalyst. The use cycle of the palladium catalyst can be prolonged, the production cost is reduced, the economic benefit and the social benefit are greatly improved, and sewage discharge is reduced.

Description

technical field [0001] The invention relates to a method for prolonging the service life of a hydrogenation tower palladium catalyst and a hydrogenation tower system thereof. Background technique [0002] Hydrogen peroxide, also known as hydrogen peroxide, is an important inorganic chemical raw material. It is mainly used in the bleaching of textiles and pulp, the synthesis of chemicals and environmental protection. It is also widely used in electronics, food and metallurgical industries. The method used by our company to produce hydrogen peroxide is the anthraquinone method, that is, the alkylanthraquinone is dissolved in an organic solvent to form a working solution, and the alkylanthraquinone is used as the working carrier, hydrogenated under the action of a palladium catalyst to make the alkylanthraquinone It is reduced to hydroanthraquinone, then oxidized with oxygen in compressed air to obtain the original alkyl anthraquinone, and hydrogen peroxide is generated at the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/04B01J8/02C01B15/023
CPCB01J8/0446B01J8/0492B01J8/0292C01B15/023B01J2208/00946Y02P20/584
Inventor 胡卫平吴海峰刘清兴严峻
Owner HANGZHOU MINGXIN HYDROGEN PEROXIDE
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