A kind of organic waste gas adsorbent and its preparation method, organic waste gas treatment method

Abstract

The present invention provides an adsorbent for organic waste gas and its preparation method, and a method for treating organic waste gas. The adsorbent includes a metal salt and a composite organic ligand, and the metal salt is composed of metal salts of three metal elements M1, M2 and M3. , wherein M1 is selected from one of Cr, Mn, Fe, Co, Ni, M2 is Cu; M3 is a rare earth element. The treatment method of the organic waste gas is as follows: the above-mentioned adsorbent is loaded in the adsorption device, the organic waste gas enters the adsorption device through the inlet for adsorption, the tail gas after the adsorption is discharged, and after the adsorption of the adsorbent is saturated, use hot oxygen-depleted air or inert The gas is purged and desorbed, and then goes to incineration. This method uses high-efficiency adsorbents to enrich the combustible components in the tail gas and then burn them directly to avoid consumption of other fuels; at the same time, the desorption process is carried out in a micro-channel device, which can avoid the risk of explosion; the method is efficient, energy-saving, and It is safe and has a good application prospect.

Description

technical field

[0001] The invention relates to an organic waste gas adsorbent, a preparation method thereof, and an organic waste gas treatment method, belonging to the field of tail gas treatment. Background technique

[0002] Gas-liquid two-phase oxidation reaction is a commonly used chemical production process. For example, hydrocarbons, alcohols, aldehydes and other compounds are oxidized with air to produce aldehydes, ketones, carboxylic acids and other products. The reaction tail gas contains a small amount of alkanes, Alcohols, aldehydes, ketones, carboxylic acids and other organic components and pollutants such as CO, the emission of exhaust gas will cause serious pollution to the surrounding environment and endanger human health, so it must be purified. The "Comprehensive Emission Standards of Air Pollutants" (GB16297-1996) promulgated by my country in 1996 stipulated the emission limits of 33 kinds of air pollutants, among which the volatile organic compounds not ...

Examples

Embodiment 1

[0052] The preparation of embodiment 1 metal organic framework compound adsorbent

[0053] a) Preparation of Adsorbent A

[0054] 2gCr(NO 3 ) 3 9H 2 O, 0.099gCuCl, 0.027gLa(NO 3 ) 3 ·6H 2 O, 5.73g 2,2'-diquinoline-4,4'-dicarboxylic acid, 1.165g ligand 2a Put 200g of distilled water in a beaker, stir at 70°C for 90min, mix well, titrate with 1mol / L hydrochloric acid to pH = 3, then transfer to a polytetrafluoroethylene-lined stainless steel reactor, react at 180°C for 60h, and cool naturally to At room temperature, filter, wash, and dry to obtain silver-gray crystals, which are then processed into spherical particles with a diameter of 0.1 mm to 0.2 mm to obtain about 5 g of adsorbent A.

[0055] b) Preparation of Adsorbent B

[0056] 1.16gCo(NO 3 ) 2 ·6H 2 O, 0.099gCuCl, 0.026gLa(NO 3 ) 3 ·6H 2 O, 6.1g of 2,2'-diquinoline-4,4'-dicarboxylic acid, 1.553g of ligand 2a, and 200g of distilled water were placed in a beaker, stirred at 70°C for 90min, mixed evenly, and...

Embodiment 2

[0073] Embodiment 2 adsorption effect experiment

[0074] (1) Experimental equipment

[0075] Self-made experimental adsorption equipment, refer to figure 1 , figure 2As shown, the adsorption device has a plurality of sheets 5 and a plurality of baffle microchannels 1 , and the baffle microchannels 1 are separated by a plurality of zigzag baffles 3 arranged in parallel and alternately. The zigzag baffles 3 have a bending angle of 100°, the width of the formed microchannel 1 is 0.1 cm, the length of the baffles 3 is 5 cm, the spacing between the lamella partitions 6 is 0.2 cm, and the length of each lamella is 5 cm. 5 sheets, the microchannel is filled with 7g of adsorbent prepared according to the method of the examples.

[0076] (2) Taking the tail gas from the reaction of isononanal (3,5,5-trimethylhexanal) to prepare isononanoic acid (3,5,5-trimethylhexanoic acid) as an example to verify the adsorption effect, the temperature of the tail gas is At 40°C, the gas composi...

Embodiment 3

[0105] Embodiment 3 desorption effect experiment

[0106] After the above-mentioned adsorbent is adsorbed and saturated, it is purged with hot oxygen-poor air (5% oxygen content) at 180°C, and the flow rate of the purge gas is 8L / h.

[0107] Adsorbent A:

[0108]

[0109] Note: "-"—not detected

[0110] Adsorbent B:

[0111]

[0112] Note: "-"—not detected

[0113] Adsorbent C:

[0114]

[0115] Note: "-"—not detected

[0116] Adsorbent D:

[0117]

[0118] Note: "-"—not detected

[0119] Adsorbent E:

[0120]

[0121] Note: "-"—not detected

[0122] Adsorbent F:

[0123]

[0124] Note: "-"—not detected

[0125] Adsorbent G:

[0126]

[0127] Note: "-"—not detected

[0128] Adsorbent H:

[0129]

technical field

[0001] The invention relates to an organic waste gas adsorbent, a preparation method thereof, and an organic waste gas treatment method, belonging to the field of tail gas treatment. Background technique

[0002] Gas-liquid two-phase oxidation reaction is a commonly used chemical production process. For example, hydrocarbons, alcohols, aldehydes and other compounds are oxidized with air to produce aldehydes, ketones, carboxylic acids and other products. The reaction tail gas contains a small amount of alkanes, Alcohols, aldehydes, ketones, carboxylic acids and other organic components and pollutants such as CO, the emission of exhaust gas will cause serious pollution to the surrounding environment and endanger human health, so it must be purified. The "Comprehensive Emission Standards of Air Pollutants" (GB16297-1996) promulgated by my country in 1996 stipulated the emission limits of 33 kinds of air pollutants, among which the volatile organic compounds not ...

Examples

Embodiment 1

[0052] The preparation of embodiment 1 metal organic framework compound adsorbent

[0053] a) Preparation of Adsorbent A

[0054] 2gCr(NO 3 ) 3 9H 2 O, 0.099gCuCl, 0.027gLa(NO 3 ) 3 ·6H 2 O, 5.73g 2,2'-diquinoline-4,4'-dicarboxylic acid, 1.165g ligand 2a Put 200g of distilled water in a beaker, stir at 70°C for 90min, mix well, titrate with 1mol / L hydrochloric acid to pH = 3, then transfer to a polytetrafluoroethylene-lined stainless steel reactor, react at 180°C for 60h, and cool naturally to At room temperature, filter, wash, and dry to obtain silver-gray crystals, which are then processed into spherical particles with a diameter of 0.1 mm to 0.2 mm to obtain about 5 g of adsorbent A.

[0055] b) Preparation of Adsorbent B

[0056] 1.16gCo(NO 3 ) 2 ·6H 2 O, 0.099gCuCl, 0.026gLa(NO 3 ) 3 ·6H 2 O, 6.1g of 2,2'-diquinoline-4,4'-dicarboxylic acid, 1.553g of ligand 2a, and 200g of distilled water were placed in a beaker, stirred at 70°C for 90min, mixed evenly, and...

Embodiment 2

[0073] Embodiment 2 adsorption effect experiment

[0074] (1) Experimental equipment

[0075] Self-made experimental adsorption equipment, refer to figure 1 , figure 2As shown, the adsorption device has a plurality of sheets 5 and a plurality of baffle microchannels 1 , and the baffle microchannels 1 are separated by a plurality of zigzag baffles 3 arranged in parallel and alternately. The zigzag baffles 3 have a bending angle of 100°, the width of the formed microchannel 1 is 0.1 cm, the length of the baffles 3 is 5 cm, the spacing between the lamella partitions 6 is 0.2 cm, and the length of each lamella is 5 cm. 5 sheets, the microchannel is filled with 7g of adsorbent prepared according to the method of the examples.

[0076] (2) Taking the tail gas from the reaction of isononanal (3,5,5-trimethylhexanal) to prepare isononanoic acid (3,5,5-trimethylhexanoic acid) as an example to verify the adsorption effect, the temperature of the tail gas is At 40°C, the gas composi...

Embodiment 3

[0105] Embodiment 3 desorption effect experiment

[0106] After the above-mentioned adsorbent is adsorbed and saturated, it is purged with hot oxygen-poor air (5% oxygen content) at 180°C, and the flow rate of the purge gas is 8L / h.

[0107] Adsorbent A:

[0108]

[0109] Note: "-"—not detected

[0110] Adsorbent B:

[0111]

[0112] Note: "-"—not detected

[0113] Adsorbent C:

[0114]

[0115] Note: "-"—not detected

[0116] Adsorbent D:

[0117]

[0118] Note: "-"—not detected

[0119] Adsorbent E:

[0120]

[0121] Note: "-"—not detected

[0122] Adsorbent F:

[0123]

[0124] Note: "-"—not detected

[0125] Adsorbent G:

[0126]

[0127] Note: "-"—not detected

[0128] Adsorbent H:

[0129]

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