Coupling reactor for synthesizing ethylene glycol by alkyl oxalate hydrogenation

The technology of alkyl oxalate and ethylene glycol is applied in the field of chemical technology, which can solve the problems of inability to guarantee the service life of the catalyst, uneven axial distribution of the fluid, and high catalyst loading coefficient, and achieves good industrial application prospects and uniform distribution of reaction gas. , Improve the effect of bed utilization

Pending Publication Date: 2019-03-01
PUJING CHEM IND SHA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this patent, the catalyst loading factor of the reactor is high, the pressure drop is small, and the production capacity is large, but the radial reactor has a large fluid flow area and a thin catalyst bed, so there is a possibility that the fluid i

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  • Coupling reactor for synthesizing ethylene glycol by alkyl oxalate hydrogenation

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Embodiment

[0032] Such as figure 1 As shown, a coupling reactor for the hydrogenation of alkyl oxalate to ethylene glycol includes an upper head 1, a lower head 24 and a reactor shell arranged between the upper head 1 and the lower head 24 Body 12, upper head 1 is provided with reaction gas inlet 3, refrigerant outlet 2 and manhole 4, lower head 24 is provided with reaction gas outlet 22, refrigerant inlet 23 and catalyst discharge port 21, the inside of reactor shell 12 is composed of A first gas distributor 61 , an adiabatic reaction section 5 , a second gas distributor 62 , and an axial radial reaction section 13 are provided sequentially from top to bottom.

[0033] Wherein, the adiabatic reaction section 5 adopts a detachable overall frame structure, including refractory ceramic ball layers 7 arranged in parallel above and below, and an adiabatic section catalyst layer 8 arranged between the two refractory ceramic ball layers 7 .

[0034] The axial radial reaction section 13 includ...

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Abstract

The invention relates to a coupling reactor for synthesizing ethylene glycol by alkyl oxalate hydrogenation. The coupling reactor comprises an upper head, a lower head and a reactor shell arranged between the upper head and the lower head, wherein the upper head is provided with a reaction gas inlet, a refrigerant outlet and a manhole; the lower head is provided with a reaction gas outlet, a refrigerant inlet and a catalyst unloading port; a first gas distributor, an adiabatic reaction section, a second gas distributor and an axial-radial reaction section are arranged in the reactor shell fromtop to bottom sequentially. Compared with the prior art, the coupling reactor is simple and compact in overall structure, good in economic practicability, safe and stable, has the advantages that reaction gas is distributed uniformly, bed temperature distribution is reasonable, selectivity of ethylene glycol is high, and production capacity of the reactor can be improved remarkably on the premisethat diameter of the reactor is not increased, and has good industrial application prospect accordingly.

Description

technical field [0001] The invention belongs to the technical field of chemical technology, and relates to a coupled reactor, in particular to a coupled reactor for hydrogenating alkyl oxalate to synthesize ethylene glycol. Background technique [0002] Ethylene glycol is an important organic chemical raw material, which can react with terephthalic acid (PTA) to produce polyethylene terephthalate (PET), that is, polyester resin, which can be used as polyester fiber and polyester Plastic raw material, which is currently the most important use of ethylene glycol. Ethylene glycol can also react with polybasic acids such as phthalic acid, maleic acid, and fumaric acid to form corresponding polymers, collectively called alkyd resins. Secondly, ethylene glycol can also be directly used as an antifreeze agent and a coolant for preparing an engine. The dinitrate of ethylene glycol can be used as an explosive, and it is also used in the production of plasticizers, paints, adhesives,...

Claims

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Application Information

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IPC IPC(8): B01J8/02B01J8/04C07C29/149C07C31/20
CPCB01J8/025B01J8/0278B01J8/0285B01J8/0453B01J8/0492B01J8/0496B01J2208/00168B01J2208/00902B01J2208/00911C07C29/149C07C31/202Y02P20/52
Inventor 张博计扬骆念军毛彦鹏
Owner PUJING CHEM IND SHA
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