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Preparation method of composite acid gas absorbent

The technology of acid gas and absorbent is applied in the field of preparation of composite acid gas absorbent, which can solve the problems of high synthesis cost and difficult to purchase, and achieve the effects of low product cost, low price and good catalytic performance.

Inactive Publication Date: 2008-09-03
NANJING UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The formation process of these composite solutions is a physical mixing process, that is, two or three solvents are mixed in a certain ratio (formulation) to form a mixed solution, and one or two solvents in the composite solution are usually not easy to purchase in the market, and the synthesis cost is high.

Method used

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  • Preparation method of composite acid gas absorbent
  • Preparation method of composite acid gas absorbent

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Embodiment Construction

[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0013] to combine figure 1 , figure 2 , the preparation method of the composite acid gas absorbent of the present invention comprises the following steps:

[0014] (1) First, crush the porous silica gel, sieve, take 10-50 mesh particles, preferably 20-30 mesh particles, dry at 120°C for 3 hours, calcinate at 650°C in a muffle furnace for 4 hours, take out , cooled to room temperature in a desiccator.

[0015] (2) Take nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O) 446g and copper nitrate (Cu(NO 3 ) 2 ·3H 2 (2) 112g was dissolved in water, and 200g of the finished product in (1) was immersed in the prepared solution, mixed thoroughly and left to stand for 24h. Then place it in a water bath at 60-70°C, evaporate and dry under stirring until the water is completely evaporated, dry at 120°C for 4 hours, slowly raise the temperature to 500°C in a muffle furnace, a...

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Abstract

A processs for preparing the composite acidic gas absorbent used to prepare catalyst includes such steps as pulverizing porous silicon gel, sieving, drying, calcining, cooling, sequentially immersing in the aqueous solution of nickel nitrate and copper nitrate, and the aqueous solution of phospho-tungstic acid, laying aside, drying, slow calcining, coaling, heating the refractory inertial material to a certain temp, using N2 to displace the air in system, adding H2 and ethanolamine to evaporator of material, evaporating, catalytic reaction on gas-phase flowing material to obtain resultant, condensing to obtain liquid phase and separating H2.

Description

1. Technical field [0001] The invention belongs to the field of catalytic synthesis and separation, in particular to a preparation method of a composite acid gas absorbent. 2. Background technology [0002] Composite acid gas absorbent is compatible with the excellent performance of a single solution, and can provide higher mass transfer driving force, higher absorption capacity, higher absorption rate and regeneration rate in the separation process. At present, various composite solutions for absorbing acid gases have been widely used in industry (Chemical Engineering Science, 2001, 56: 6217-6224). Patents such as US 4,397,660 and DE3,411,532 propose composite solvents. US4,892,674 proposes adding a hindered amine salt or a hindered amino acid to form a composite solvent in an alcohol amine solvent; US4,895,670 proposes a composite solvent formed by a sterically hindered amine and a hindered amino acid. CN1356157A proposes a mixed solvent consisting of MDEA (N-methyldieth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
Inventor 王连军陆建刚李健生孙秀云刘晓东
Owner NANJING UNIV OF SCI & TECH