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Catalyst for synergistically purifying multiple pollutants in adipic acid device and preparation and application thereof

A composite catalyst, dual-function catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalyst, adipic acid production, etc. Effect

Inactive Publication Date: 2020-08-14
BEIJING UNIV OF CHEM TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the pollution problem of the waste gas of the adipic acid production unit, propose a kind of in-situ preparation method of the bifunctional molecular sieve-based catalyst, select the best catalyst, and adopt the method of catalytic decomposition and catalytic reduction, which can N produced during the production of adipic acid 2 O and NO x (except N 2 Other nitrogen oxides other than O, such as NO) are purified in the same reactor

Method used

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  • Catalyst for synergistically purifying multiple pollutants in adipic acid device and preparation and application thereof
  • Catalyst for synergistically purifying multiple pollutants in adipic acid device and preparation and application thereof
  • Catalyst for synergistically purifying multiple pollutants in adipic acid device and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: take by weighing 2.2g copper acetate monohydrate (Cu(CH 3 COO) 2 ·H 2 O) Dissolve in 1 g of water, add 0.5 g of tetraethylenepentamine (TEPA), stir at room temperature for 2 h, and obtain copper amine complex (Cu-TEPA). Then weigh 7.5g of phosphoric acid, add 17g of water, mix evenly, pour into the complexed Cu-TEPA solution and stir for 5min. Add 5.6g pseudo-boehmite (70%wt), 5.3g silica sol (30%wt), 5g diethylamine (DEA), 1g seed crystal (H-SAPO-34Si:Al:P=1:1 : 1), stirring at normal temperature for 60min, the crystallization liquid is packed into 100mL to be equipped with in the dynamic reactor of polytetrafluoroethylene liner, and pass into N 2 and N 2 Mixture of O N 2 :N 2 O=9:1, keep the pressure at 1.5Mpa, and crystallize at 150°C for 7 days to obtain a solid phase product. The product was washed and separated by centrifugation at 5000r / min for 3min, dried in an oven at 100°C for 12h, and finally calcined at 550°C for 6h with a heating rate o...

Embodiment 2

[0027] Embodiment 2: take by weighing 4.5g copper acetate monohydrate (Cu(CH 3 COO) 2 ·H 2 O) Dissolve in 2.5 g of water, add 0.5 g of tetraethylenepentamine (TEPA), and stir at room temperature for 2 h to obtain copper amine complex (Cu-TEPA). Then weigh 7.5g of phosphoric acid, add 17g of water, mix evenly, pour into the complexed Cu-TEPA solution and stir for 5min. Add 5.6g pseudo-boehmite (70%wt), 5.3g silica sol (30%wt), 5g diethylamine (DEA), 1g seed crystal (H-SAPO-34Si:Al:P=1:1 : 1), stirring at normal temperature for 60min, the crystallization liquid is packed into 100mL to be equipped with in the dynamic reactor of polytetrafluoroethylene liner, and pass into N 2 and N 2 Mixture of O N 2 :N 2 O=9:1, keep the pressure at 1.5Mpa, and crystallize at 150°C for 7 days to obtain a solid phase product. The product was washed and separated by centrifugation at 5000r / min for 3min, dried in an oven at 100°C for 12h, and finally calcined at 550°C for 6h with a heating ra...

Embodiment 3

[0028] Embodiment 3: take by weighing 9g copper acetate monohydrate (Cu(CH 3 COO) 2 ·H 2 O) Dissolve in 2.5 g of water, add 0.767 g of tetraethylenepentamine (TEPA), and stir at room temperature for 2 h to obtain copper amine complex (Cu-TEPA). Then weigh 6.92g of phosphoric acid, add 15.25g of water, mix well, pour into the complexed Cu-TEPA solution and stir for 5min. Add 5.46g pseudo-boehmite (70%wt), 5.41g silica sol (30%wt), 4.64g diethylamine (DEA), 0.6g seed crystal (H-SAPO-34Si:Al:P=1 :1:1), stirring at room temperature for 30min, the crystallization solution was charged into a 50mL dynamic reactor equipped with a polytetrafluoroethylene liner, and N 2 and N 2 Mixture of O N 2 :N 2 O=9:1, keep the pressure at 1.5Mpa, and crystallize at 150°C for 7 days to obtain a solid phase product. The product was washed and separated by centrifugation at 5000r / min for 3min, dried in an oven at 100°C for 12h, and finally calcined at 550°C for 6h with a heating rate of 2°C / min...

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Abstract

The invention discloses a catalyst for synergistically purifying multiple pollutants in an adipic acid device, and preparation and application of the catalyst. The catalyst consists of a carrier, an auxiliary agent and a metal load, wherein the carrier is an SAPO-34 molecular sieve synthesized in situ, and pseudo-boehmite and silica sol are needed for synthesis of the SAPO-34 molecular sieve; theauxiliary agent is tetraethylenepentamine (TEPA), phosphoric acid and diethylamine (DEA), and the metal load is Fe and Cu; and main active components of the catalyst are Fe2O3, Cu2O and the like. Thecatalyst can be used in the field of tail gas treatment in adipic acid production or nitric acid production. The catalyst provided by the invention can realize simultaneous catalysis of purification reactions of N2O and NOx, has the advantages of simple preparation process and wide raw material sources, and can provide an effective catalyst for the field of environmental governance.

Description

technical field [0001] The invention belongs to a preparation method and application of a catalyst used for the purification treatment of waste gas produced by adipic acid, in particular to a zeolite metal composite oxide catalyst to catalyze the decomposition of N 2 O and NO x NH 3 - SCR reaction and preparation method of this type of catalyst. It can be used for the treatment of nitrogen-containing waste gas discharged from adipic acid and cyclohexanol manufacturers. Background technique [0002] In recent years, due to the rapid increase in the market price of adipic acid, the number of adipic acid installations in my country has also increased rapidly. In 2016, the annual output has reached 3.5 million tons, accounting for almost half of the global production capacity. In the production of adipic acid, a large amount of waste gas will be produced, especially various nitrogen oxides, nitric oxide (NO), nitrogen dioxide (NO 2 ) has constituted a series of important nit...

Claims

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Application Information

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IPC IPC(8): B01J29/85B01J37/30B01D53/86B01D53/56
CPCB01D53/8628B01D2251/2062B01D2257/402B01D2257/404B01J29/85B01J37/30B01J2229/183B01J2229/186Y02C20/10Y02P20/30
Inventor 陈标华张傑赵铎史红军李英霞陈聚良屈建海陈亚春钟儒学朱子强金保国张军明刘水侠赵瑞冯继伟刘荣鸽梁甫徐宏宁
Owner BEIJING UNIV OF CHEM TECH
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