A method for treating a PO catalyst production off-gas

Abstract

The application provides a treatment method of PO catalyst production tail gas. The treatment method comprises the following steps: first, using an absorbent to absorb and treat the tail gas, and then using an adsorbent to adsorb and treat the tail gas after the absorption treatment; the absorbent comprises an acid solution and a surfactant. The treatment method provided by the application comprises two treatment steps of absorption treatment and adsorption treatment in sequence, and the absorbent with a specific composition is used in the absorption treatment step, so that various pollutants in the PO catalyst production tail gas can be effectively reduced, and the treatment method has the advantages of high VOCs removal rate and effective removal of silicon-containing pollutants in the tail gas.

Description

Technical Field

[0001] This invention belongs to the field of industrial exhaust gas treatment technology, specifically relating to a method for treating exhaust gas from PO catalyst production. Background Technology

[0002] The production process of propylene oxide (PO) catalyst requires the use of a large amount of silicone oil, and the waste gas generated during the production process contains a large amount of silicon-containing pollutants such as siloxanes and silanols. It is a waste gas with high ammonia nitrogen and high volatile organic compounds (VOCs) that is difficult to degrade.

[0003] Currently, the treatment method for waste gas containing organosilicon pollutants is mostly condensation followed by activated carbon adsorption before high-altitude emission. For example, CN116036784A discloses a treatment process for waste gas with high hydrogen content silicone oil, which involves two-stage cooling to recover the silicone oil, followed by activated carbon adsorption to ensure the gas meets emission standards. However, for waste gas with high VOC content, this method leads to high activated carbon consumption and generates a large amount of solid waste, and the activated carbon adsorption effect is poor when the water vapor content in the waste gas is high. Therefore, this treatment process is not suitable for treating waste gas from PO catalyst production processes.

[0004] CN101274269A discloses an adsorption resin with concentrated pore size and large micropore specific surface area and its preparation method. The resin has good adsorption selectivity for benzene-based organic compounds, but it does not have a significant advantage in treating gases containing silicon components.

[0005] Therefore, it is very meaningful to develop a method that can effectively treat the tail gas produced by PO catalyst. Summary of the Invention

[0006] Based on the above analysis, the present invention aims to provide a method for treating exhaust gas from PO catalyst production, in order to solve the technical problems of low VOCs removal rate and low silicon-containing pollutant removal rate when treating exhaust gas from PO catalyst production in the prior art.

[0007] The objective of this invention is mainly achieved through the following technical solutions.

[0008] This invention provides a method for treating tail gas produced by PO catalyst, comprising: firstly absorbing the tail gas with an absorbent, and then adsorbing the absorbed tail gas with an adsorbent.

[0009] The absorbent includes an acid solution and a surfactant.

[0010] The method for treating PO catalyst production tail gas provided by the present invention includes sequential absorption treatment and adsorption treatment. By using an absorbent with a specific composition in the absorption treatment step, various pollutants in the PO catalyst production tail gas can be effectively reduced, thus achieving effective treatment of the PO catalyst production tail gas.

[0011] In this invention, the acid solution in the absorbent can absorb a large amount of ammonia in the tail gas, preventing ammonia from clogging the pores of the resin adsorbent and causing adsorption failure. The surfactant can improve the absorption effect of silanols in an ammonium ion environment. By using an absorbent including an acid solution and a surfactant for absorption treatment, the concentration of ammonia and silanol components in the PO catalyst production tail gas can be significantly reduced, thereby effectively avoiding the influence of ammonia and silanol components on the adsorbent in subsequent adsorption treatment.

[0012] According to some embodiments of the present invention, the ammonia concentration in the exhaust gas after absorption treatment is 1-20 mg / m³. 3 The concentration of silanol components is 10–50 mg / m³. 3 .

[0013] According to some embodiments of the present invention, the acid solution includes at least one of hydrochloric acid, sulfuric acid, and nitric acid.

[0014] According to some embodiments of the present invention, the concentration of the acid solution is 10 w% to 30 w%.

[0015] According to some embodiments of the present invention, the surfactant includes an amino acid surfactant.

[0016] In this invention, an amino acid surfactant is selected as the surfactant, which, compared to other types of surfactants, can further improve the absorption effect of the absorbent on silanol in an ammonium ion environment.

[0017] According to some embodiments of the present invention, the amino acid surfactant includes at least one of dodecylaminopropionic acid, dodecyl dimethylene aminodicarboxylic acid, sodium lauroyl glutamate, and sodium cocoyl glutamate.

[0018] In this invention, the above-mentioned amino acid surfactants are used to formulate the absorbent, which makes the absorbent more favorable for the absorption of silanol in an ammonium ion environment compared to the use of other types of amino acid surfactants.

[0019] According to some embodiments of the present invention, the mass ratio of the acid (solute in the acid solution) to the surfactant is 100 to 500, for example, it can be 100, 120, 125, 140, 150, 160, 180, 200, 220, 240, 270, 300, 325, 350, 375, 400, 430, 450, 480, 500, etc.

[0020] According to some embodiments of the present invention, the volumetric flow rate ratio of the exhaust gas to the absorbent is 0.5 to 5, for example, it can be 0.5, 0.8, 1, 1.2, 1.5, 1.6, 2, 2.5, 3, 3.5, 4, 4.4, 4.6, 5, etc.

[0021] According to some embodiments of the present invention, the absorption treatment includes: passing the exhaust gas from bottom to top through a spray tower, and spraying an absorbent from top to bottom onto the exhaust gas passing through the spray tower for absorption treatment.

[0022] According to some embodiments of the present invention, the adsorbent is a styrene-divinylbenzene resin containing amino groups.

[0023] Compared to other adsorbents, the styrene-divinylbenzene resin containing amino groups used in this invention has a better adsorption effect on the treated exhaust gas.

[0024] According to some embodiments of the present invention, the method for preparing the styrene-divinylbenzene resin containing amino groups includes: firstly, reacting the styrene-divinylbenzene resin with a chloromethylating agent to undergo a chloromethylation reaction, and then reacting the chloromethylated styrene-divinylbenzene resin with an amination agent to undergo an amination reaction, thereby obtaining the styrene-divinylbenzene resin containing amino groups.

[0025] The styrene-divinylbenzene resin in this invention can be a commercially available product or prepared using existing common preparation methods.

[0026] According to some embodiments of the present invention, the content of divinylbenzene units in the styrene-divinylbenzene resin is 40wt% to 50wt%.

[0027] In this invention, the degree of crosslinking (divinylbenzene unit content) of styrene-divinylbenzene resin affects the adsorption effect of the adsorbent. Adsorbents prepared using styrene-divinylbenzene resin with a crosslinking degree of 40% to 50% as raw material can achieve better adsorption effects.

[0028] According to some embodiments of the present invention, the chloromethylating agent is selected from at least one of chloromethyl ether, chloromethanol, and p-dichlorobenzyl. Compared with other reagents that can undergo chloromethylation reaction with styrene-divinylbenzene resin, the above-mentioned chloromethylating agents provided by the present invention can enable the prepared adsorbent to have better adsorption effect.

[0029] According to some embodiments of the present invention, the amination reagent is selected from at least one of diethylenetriamine and triethylenetetramine. Compared with other reagents that can undergo amination reactions with chloromethylated styrene-divinylbenzene resins, the above-mentioned amination reagents provided by the present invention can enable the prepared adsorbent to have better adsorption effects.

[0030] According to some embodiments of the present invention, the mass ratio of the styrene-divinylbenzene resin to the chloromethylating agent is 10 to 100, for example, it can be 10, 12, 15, 20, 25, 27, 30, 33.3, 35, 38, 40, 45, 48, 50, 51, 55, 60, 65, 66, 70, 75, 78, 80, 82, 86, 90, 95, 100, etc.

[0031] According to some embodiments of the present invention, the mass ratio of the chloromethylating agent to the amination agent is 1 to 10, for example, it can be 1, 1.5, 2, 3, 3.3, 4, 4.5, 5, 6, 7, 8, 9, 10, etc.

[0032] According to some embodiments of the present invention, the chloromethylation reaction is carried out in the presence of an organic solvent and a Lewis acid.

[0033] According to some embodiments of the present invention, the Lewis acid includes ferric chloride.

[0034] According to some embodiments of the present invention, the amination reaction is carried out in an organic solvent.

[0035] According to some embodiments of the present invention, the temperature of the amination reaction is 60-120°C, for example, 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°C, etc.; the time of the amination reaction is 8-24h, for example, 8h, 9h, 10h, 12h, 14h, 15h, 18h, 19h, 20h, 21h, 22h, 24h, etc.

[0036] According to some embodiments of the present invention, the preparation method of the styrene-divinylbenzene resin containing amino groups includes: swelling styrene-divinylbenzene resin in an organic solvent, adding a chloromethylating agent, and reacting with ferric chloride as a catalyst to obtain chloromethylated styrene-divinylbenzene resin; adding an amination agent, reacting at 60-120°C for 8-24 hours, washing, and drying to obtain the adsorbent.

[0037] According to some embodiments of the present invention, the organic solvent includes dichloromethane.

[0038] According to some embodiments of the present invention, the VOCs concentration in the tail gas produced by the PO catalyst is 5000–100000 mg / m³. 3 Ammonia concentration is 5000–20000 mg / m³ 3 The concentration of silanol components is 100–3000 mg / m³. 3 The concentration of silane components is 3000–10000 mg / m³. 3 .

[0039] Compared with the prior art, the present invention can achieve at least the following beneficial effects:

[0040] The method for treating the tail gas from PO catalyst production provided by this invention includes two treatment steps: absorption treatment and adsorption treatment performed sequentially. In the absorption treatment step, an absorbent with a specific composition is used, which can effectively reduce various pollutants in the tail gas from PO catalyst production. It has the advantages of high VOCs removal rate and effective removal of silicon-containing pollutants in the tail gas. Detailed Implementation

[0041] To make the technical problem to be solved, the technical solution, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely for illustrating this patent and do not limit the scope of protection of this invention in any way.

[0042] Unless otherwise defined, the technical terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art. Unless otherwise specified, the reagents used in the following embodiments are conventional biochemical reagents; the raw materials, instruments, and equipment used in the following embodiments can all be obtained commercially or by existing methods; unless otherwise specified, the reagent dosages are those used in routine experimental operations; unless otherwise specified, the experimental methods are conventional methods.

[0043] The testing methods for the various performance data involved in the embodiments and comparative examples of the present invention include: the concentration of ammonia is determined by hydrochloric acid titration, and the concentrations of silanol, silane, and VOCs are determined by an Agilent 7890A gas chromatograph.

[0044] The PO catalyst production tail gas treated in the various embodiments and comparative examples of the present invention is the same tail gas, and the concentrations of various pollutants in the tail gas are shown in Table 1.

[0045] Example 1

[0046] (1) Absorption treatment: The tail gas from the production of PO catalyst is passed from bottom to top through a spray tower, and the absorbent is sprayed from top to bottom through the spray tower to absorb the tail gas passing through the spray tower.

[0047] in:

[0048] Absorbent: Hydrochloric acid (20 wt%) + 0.1 wt% dodecylaminopropionic acid;

[0049] Absorbent flow rate: 100m 3 / h;

[0050] Exhaust gas flow rate: 100m³ 3 / h.

[0051] (2) Adsorption treatment:

[0052] Adsorbent preparation: 15g polyvinyl alcohol, 200g deionized water, 100g styrene, 200g toluene, 100g divinylbenzene, and 1g benzoyl peroxide were mixed and reacted at 90℃ for 6h. After washing with alcohol and water, and drying, styrene-divinylbenzene resin was obtained. 100g styrene-divinylbenzene resin and 10g benzyl p-chloroform were added to 100mL dichloromethane and soaked and swollen for 12h. 0.5g FeCl3 was added and reacted at 60℃ for 12h. Sodium hydroxide was added to adjust the pH to 10. Then 1g triethylenetetramine was added and reacted at 90℃ for 12h. After washing with alcohol and water, and drying, the adsorbent was obtained.

[0053] Adsorption treatment conditions include:

[0054] Resin column filling volume: 1L;

[0055] Adsorption residence time: 20s.

[0056] The results of exhaust gas treatment are shown in Table 2.

[0057] Example 2

[0058] (1) Absorption treatment: The tail gas from the production of PO catalyst is passed from bottom to top through a spray tower, and the absorbent is sprayed from top to bottom through the spray tower to absorb the tail gas passing through the spray tower.

[0059] in:

[0060] Absorbent: Sulfuric acid (25wt%) + 0.2wt% sodium lauroyl glutamate;

[0061] Absorbent flow rate: 50m 3 / h;

[0062] Exhaust gas flow rate: 100m³ 3 / h.

[0063] (2) Adsorption treatment:

[0064] Adsorbent preparation: 15g polyvinyl alcohol, 200g deionized water, 100g styrene, 200g toluene, 70g divinylbenzene, and 1g benzoyl peroxide were mixed and reacted at 90℃ for 6h. After washing with alcohol and water, and drying, styrene-divinylbenzene resin was obtained. 100g styrene-divinylbenzene resin and 5g p-dichlorobenzyl were added to 100mL dichloromethane and soaked for 12h to swell. 0.5g FeCl3 was added and reacted at 60℃ for 12h. Sodium hydroxide was added to adjust the pH to 10. Then 1g diethylenetriamine was added and reacted at 90℃ for 12h. After washing with alcohol and water, and drying, the adsorbent was obtained.

[0065] Adsorption treatment conditions include:

[0066] Resin column filling volume: 1L;

[0067] Adsorption residence time: 20s.

[0068] The results of exhaust gas treatment are shown in Table 2.

[0069] Example 3

[0070] (1) Absorption treatment: The tail gas from the production of PO catalyst is passed from bottom to top through a spray tower, and the absorbent is sprayed from top to bottom through the spray tower to absorb the tail gas passing through the spray tower.

[0071] in:

[0072] Absorbent: Nitric acid (15 wt%) + 0.1 wt% dodecyl dimethylaminodicarboxylic acid;

[0073] Absorbent flow rate: 50m 3 / h;

[0074] Exhaust gas flow rate: 80m³ 3 / h.

[0075] (2) Adsorption treatment:

[0076] Adsorbent preparation: 15g polyvinyl alcohol, 200g deionized water, 100g styrene, 200g toluene, 80g divinylbenzene, and 1g benzoyl peroxide were mixed and reacted at 90℃ for 6h. After washing with alcohol and water, and drying, styrene-divinylbenzene resin was obtained. 100g styrene-divinylbenzene resin and 3g chloromethyl ether were added to 100mL dichloromethane and soaked and swollen for 12h. 0.5g FeCl3 was added and reacted at 60℃ for 12h. Sodium hydroxide was added to adjust the pH to 10. Then 2g triethylenetetramine was added and reacted at 90℃ for 12h. After washing with alcohol and water, and drying, the adsorbent was obtained.

[0077] Adsorption treatment conditions include:

[0078] Resin column filling volume: 1L;

[0079] Adsorption residence time: 20s.

[0080] The results of exhaust gas treatment are shown in Table 2.

[0081] Example 4

[0082] (1) Absorption treatment: The tail gas from the production of PO catalyst is passed from bottom to top through a spray tower, and the absorbent is sprayed from top to bottom through the spray tower to absorb the tail gas passing through the spray tower.

[0083] in:

[0084] Absorbent: Hydrochloric acid (20wt%) + 0.1wt% sodium lauroyl glutamate;

[0085] Absorbent flow rate: 50m 3 / h;

[0086] Exhaust gas flow rate: 100m³ 3 / h.

[0087] (2) Adsorption treatment:

[0088] Adsorbent preparation: 15g polyvinyl alcohol, 200g deionized water, 100g styrene, 200g toluene, 90g divinylbenzene, and 1g benzoyl peroxide were mixed and reacted at 90℃ for 6h. After washing with alcohol and water, and drying, styrene-divinylbenzene resin was obtained. 100g styrene-divinylbenzene resin and 10g chloromethanol were added to 100mL dichloromethane and soaked for swelling for 12h. 0.5g FeCl3 was added and reacted at 60℃ for 12h. Sodium hydroxide was added to adjust the pH to 10. Then 3g triethylenetetramine was added and reacted at 90℃ for 12h. After washing with alcohol and water, and drying, the adsorbent was obtained.

[0089] Adsorption treatment conditions include:

[0090] Resin column filling volume: 1L;

[0091] Adsorption residence time: 20s.

[0092] The results of exhaust gas treatment are shown in Table 2.

[0093] Example 5

[0094] (1) Absorption treatment: The tail gas from the production of PO catalyst is passed from bottom to top through a spray tower, and the absorbent is sprayed from top to bottom through the spray tower to absorb the tail gas passing through the spray tower.

[0095] in:

[0096] Absorbent: Hydrochloric acid (28wt%) + 0.2wt% sodium cocoyl glutamate;

[0097] Absorbent flow rate: 50m 3 / h;

[0098] Exhaust gas flow rate: 200m³ 3 / h.

[0099] (2) Adsorption treatment:

[0100] Adsorbent preparation: 15g polyvinyl alcohol, 200g deionized water, 100g styrene, 200g toluene, 100g divinylbenzene, and 1g benzoyl peroxide were mixed and reacted at 90℃ for 6h. After washing with alcohol and water, and drying, styrene-divinylbenzene resin was obtained. 100g styrene-divinylbenzene resin and 10g benzyl p-chloroform were added to 100mL dichloromethane and soaked and swollen for 12h. 0.5g FeCl3 was added and reacted at 60℃ for 12h. Sodium hydroxide was added to adjust the pH to 10. Then 2g diethylenetriamine was added and reacted at 90℃ for 12h. After washing with alcohol and water, and drying, the adsorbent was obtained.

[0101] Adsorption treatment conditions include:

[0102] Resin column filling volume: 1L;

[0103] Adsorption residence time: 20s.

[0104] The results of exhaust gas treatment are shown in Table 2.

[0105] Example 6

[0106] The exhaust gas was treated according to the method in Example 1, except that the content of divinylbenzene units in the styrene-divinylbenzene resin used to prepare the adsorbent was different.

[0107] The preparation method of styrene-divinylbenzene resin includes: mixing 15g polyvinyl alcohol, 200g deionized water, 100g styrene, 200g toluene, 150g divinylbenzene, and 1g benzoyl peroxide, stirring and reacting at 90℃ for 6h, washing with alcohol, washing with water, and drying to obtain styrene-divinylbenzene resin.

[0108] The results of exhaust gas treatment are shown in Table 2.

[0109] Example 7

[0110] The exhaust gas was treated according to the method in Example 1, except that the content of divinylbenzene units in the styrene-divinylbenzene resin used to prepare the adsorbent was different.

[0111] The preparation method of styrene-divinylbenzene resin includes: mixing 15g polyvinyl alcohol, 200g deionized water, 100g styrene, 200g toluene, 43g divinylbenzene, and 1g benzoyl peroxide, stirring and reacting at 90℃ for 6h, washing with alcohol, washing with water, and drying to obtain styrene-divinylbenzene resin.

[0112] The results of exhaust gas treatment are shown in Table 2.

[0113] Example 8

[0114] The exhaust gas was treated according to the method in Example 1, the only difference being that the composition of the absorbent was different.

[0115] Absorbent: Hydrochloric acid (20wt%) + 0.1wt% glycerol monopyrrolidone carboxylic acid ester.

[0116] The results of exhaust gas treatment are shown in Table 2.

[0117] Example 9

[0118] The exhaust gas was treated according to the method in Example 1, the only difference being that the composition of the absorbent was different.

[0119] Absorbent: Hydrochloric acid (20wt%) + 0.1wt% octadecyl dimethyl betaine.

[0120] The results of exhaust gas treatment are shown in Table 2.

[0121] Comparative Example 1

[0122] The tail gas was treated according to the method in Example 1, except that: no spray absorption treatment was performed, and only an adsorbent was used to adsorb the tail gas produced by the PO catalyst.

[0123] The results of exhaust gas treatment are shown in Table 2.

[0124] Comparative Example 2

[0125] The tail gas was treated according to the method in Example 1, except that: no adsorption treatment was performed, and only an absorbent was used to spray and absorb the tail gas produced by the PO catalyst.

[0126] The results of exhaust gas treatment are shown in Table 2.

[0127] Comparative Example 3

[0128] The exhaust gas was treated according to the method in Example 1, except that the absorbent did not contain dodecylaminopropionic acid.

[0129] The results of exhaust gas treatment are shown in Table 2.

[0130] Table 1

[0131]

[0132] Table 2

[0133]

[0134]

[0135] Note: After absorption treatment, the reduction in VOCs and silanes in the gas is not significant, and test results are not given in the table.

[0136] The above experimental results show that the treatment method provided by this invention can effectively reduce various pollutants in the tail gas from PO catalyst production. If only adsorption treatment is performed without absorption treatment (Comparative Example 1), not only will the removal effect of ammonia and silanol pollutants be unsatisfactory, but the treatment effect of silane pollutants and VOCs will also be affected. If only absorption treatment is performed without adsorption treatment (Comparative Example 2), silane pollutants cannot be removed, and the treatment effect of VOCs is also very limited. If the absorbent does not include amino acid surfactants (Comparative Example 3), the treatment effect will also be significantly worse.

[0137] Emission standards for VOCs content in gases vary across regions. For example, the national standard requires VOCs content in gases to be ≤120 mg / m³. 3 Shanghai implements stricter emission standards, requiring VOCs content in the gas to be ≤60mg / m³. 3 The test results above show that the exhaust gases treated in Examples 1-9 can all meet the national emission standards, while the exhaust gas treatment effect in Examples 1-5 is even better and can fully meet the emission standards of Shanghai.

[0138] Any numerical value mentioned in this invention, if there is only a two-unit interval between any minimum and any maximum value, includes all values ​​that increase by one unit each time from the minimum to the maximum value. For example, if the amount of a component, or the value of a process variable such as temperature, pressure, or time, is stated as 50-90, in this specification it means specifically listing values ​​such as 51-89, 52-88… and 69-71 and 70-71, etc. For non-integer values, it may be appropriately considered that a unit is 0.1, 0.01, 0.001, or 0.0001. These are merely some specifically specified examples. In this application, in a similar manner, all possible combinations of numerical values ​​between the listed minimum and maximum values ​​are considered to have been disclosed.

[0139] It should be noted that the embodiments described above are only for explaining the present invention and do not constitute any limitation on the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory terms, not limiting terms. Modifications can be made to the present invention within the scope of the claims, and revisions can be made to the present invention without departing from the scope and spirit of the present invention. Although the present invention described herein relates to specific methods, materials, and embodiments, it does not mean that the present invention is limited to the specific examples disclosed herein; on the contrary, the present invention can be extended to all other methods and applications with the same function.

Claims

1. A method for treating tail gas from PO catalyst production, characterized in that, include: The exhaust gas is first absorbed using an absorbent, and then adsorbent is used to adsorb the absorbed exhaust gas. The absorbent includes an acid solution and a surfactant.

2. The processing method according to claim 1, characterized in that, The acid solution includes at least one of hydrochloric acid, sulfuric acid, and nitric acid; preferably, the concentration of the acid solution is 10 w% to 30 w%. And / or, the surfactant includes an amino acid surfactant; preferably, the amino acid surfactant includes at least one of dodecylaminopropionic acid, dodecyl dimethylene aminodicarboxylic acid, sodium lauroyl glutamate, and sodium cocoyl glutamate.

3. The processing method according to claim 1 or 2, characterized in that, The mass ratio of the acid to the surfactant is 100 to 500.

4. The processing method according to any one of claims 1-3, characterized in that, The volumetric flow rate ratio of the exhaust gas to the absorbent is 0.5 to 5.

5. The processing method according to any one of claims 1-4, characterized in that, The absorption treatment includes: passing the exhaust gas from bottom to top through a spray tower, and spraying absorbent from top to bottom onto the exhaust gas passing through the spray tower for absorption treatment.

6. The processing method according to any one of claims 1-5, characterized in that, The adsorbent is a styrene-divinylbenzene resin containing amino groups.

7. The processing method according to claim 6, characterized in that, The preparation method of the styrene-divinylbenzene resin containing amino groups includes: firstly, reacting the styrene-divinylbenzene resin with a chloromethylating agent to undergo a chloromethylation reaction, and then reacting the chloromethylated styrene-divinylbenzene resin with an amination agent to undergo an amination reaction, thereby obtaining the styrene-divinylbenzene resin containing amino groups. Preferred, The content of divinylbenzene units in the styrene-divinylbenzene resin is 40wt% to 50wt%; And / or, the chloromethylating agent is selected from at least one of chloromethyl ether, chloromethanol, and p-dichlorobenzyl; And / or, the amination agent is selected from at least one of diethylenetriamine and triethylenetetramine.

8. The processing method according to claim 7, characterized in that, The mass ratio of the styrene-divinylbenzene resin to the chloromethylating agent is 10 to 100. And / or, the mass ratio of the chloromethylating agent to the amination agent is 1 to 10.

9. The processing method according to claim 7 or 8, characterized in that, The chloromethylation reaction is carried out in the presence of an organic solvent and a Lewis acid; preferably, the Lewis acid includes ferric chloride. And / or, the amination reaction is carried out in an organic solvent; And / or, the amination reaction is carried out at a temperature of 60–120°C for a time of 8–24 h.

10. The processing method according to any one of claims 1-9, characterized in that, The VOCs concentration in the tail gas from the PO catalyst production process is 5000–100000 mg / m³. 3 Ammonia concentration is 5000–20000 mg / m³ 3 The concentration of silanol components is 100–3000 mg / m³. 3 The concentration of silane components is 3000–10000 mg / m³. 3 .

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