Natural gas desulfurizer, its preparation method and application
By preparing a mixed desulfurizing agent of 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine in a molar ratio of (1~3):(2~4), the problems of poor selectivity and low efficiency in the existing technology were solved, and the effect of efficient removal of H2S and organic sulfur was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2026-05-22
AI Technical Summary
Existing natural gas desulfurizing agents have poor selectivity and low desulfurization efficiency when purifying high-sulfur natural gas, and also suffer from solvent loss and side reaction formation that makes regeneration difficult.
2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine in a molar ratio of (1~3):(2~4) were used as desulfurizing agents. The mixture was prepared by reacting it under specific conditions and then distilling it under reduced pressure. The resulting mixed desulfurized liquid was then desulfurized at a specific temperature.
It improved the selective removal rates of H2S and organic sulfur to 98%~99% and 70%~75% respectively, reduced energy consumption and byproduct generation, and improved the desulfurization effect.
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of desulfurization agent development technology, and relates to a natural gas desulfurization agent, its preparation method and application. Background Technology
[0002] With a deeper global understanding of sustainable development and increasing human concern for the quality of their living environment, the standards for controlling the sulfur content of natural gas, as a clean energy source, are becoming increasingly stringent. To meet this demand, natural gas desulfurization technology has been widely researched and applied. Natural gas desulfurization methods are mainly divided into two categories: dry and wet methods, each with different characteristics and applicable scenarios.
[0003] Dry desulfurization technology uses solids as desulfurizing agents and has the advantage of high desulfurization efficiency. However, most of these desulfurizing agents are non-renewable and have relatively low sulfur capacity, making them more suitable for processing natural gas with low sulfur content or for fine desulfurization stages in natural gas chemical processes. Although dry desulfurization performs well in certain specific situations, its limitations are also quite obvious, making it difficult to meet the needs of large-scale, high-sulfur natural gas processing.
[0004] In contrast, wet desulfurization technology has become dominant in large-scale, high-sulfur natural gas processing. Wet desulfurization removes sulfides from natural gas through solution absorption, which is currently the primary method for treating natural gas with high hydrogen sulfide content. Early wet desulfurization units often used ethanolamine as a solvent. Ethanolamine, as one of the strongest bases among amines, has extremely high chemical reactivity and can rapidly react with acidic gases (such as H2S and CO2), thereby achieving significant removal. However, ethanolamine also has some significant drawbacks. First, it has almost no selectivity, meaning that while removing H2S, it also removes a large amount of CO2, which may not be ideal in certain situations. Second, ethanolamine is prone to foaming and degradation, and during the purification process, it can react with certain components in the feed gas to generate non-renewable degradation products (such as oxazolidinones), causing some of the solvent to lose its desulfurization capacity. Furthermore, ethanolamines react irreversibly with organic sulfur compounds in natural gas, such as carbonyl sulfide and carbon disulfide, leading to solvent loss and the accumulation of degradation products, further impacting desulfurization efficiency. Additionally, desulfurizing agents using secondary alcohol amines as solvents offer some improvement, but they also suffer from a lack of selectivity, making it difficult to remove H2S to a level suitable for transportation. Therefore, despite the significant advantages of wet desulfurization technology in treating high-sulfur natural gas, continuous research and development of new desulfurizing agents and processes are necessary to enhance desulfurization efficiency, reduce costs, and minimize environmental pollution. Summary of the Invention
[0005] In view of the problems existing in the prior art, the present invention provides a natural gas desulfurizing agent, its preparation method and application, thereby solving the technical problems of poor selectivity and low desulfurization efficiency of the existing desulfurizing agents when purifying large amounts of high sulfur-containing natural gas.
[0006] This invention is achieved through the following technical solution: A natural gas desulfurizing agent comprising 2-(2-morpholino-4-ethoxy)-ethanol and N-methyldiethanolamine in a molar ratio of (1~3):(2~4).
[0007] The above-mentioned method for preparing a natural gas desulfurizing agent includes the following steps: S1: Morpholine and 2-chloroethoxyethanol are mixed evenly and then methanol is added to react. After the reaction is completed, the pH of the system is adjusted to neutral and refluxed. After the reaction is completed, the reaction solution is filtered and the filtrate is distilled under reduced pressure to obtain the 2-(2-morpholine-4-ethoxy)-ethanol. S2: The natural gas desulfurizer is prepared by mixing the 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine evenly.
[0008] Preferably, the molar ratio of morpholine to 2-chloroethoxyethanol is (1~0.5):(3~1).
[0009] Preferably, the molar ratio of morpholine to 2-chloroethoxyethanol is 3:1.
[0010] Preferably, the amount of methanol added is 1 wt% to 10 wt% of the mixed solution of morpholine and 2-chloroethoxyethanol.
[0011] Preferably, the morpholine and 2-chloroethoxyethanol are mixed evenly and then methanol is added to carry out the reaction. The reaction temperature is 120~180℃ and the time is 2~5h.
[0012] Preferably, the reflux reaction is carried out at a temperature of 65-75°C for 55-65 minutes.
[0013] Preferably, the pressure of the vacuum distillation is 1~4 kPa and the time is 30~60 min.
[0014] The above-mentioned natural gas desulfurizer is used in crude oil desulfurization by dissolving the natural gas desulfurizer in water to prepare a mixed desulfurization solution of 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanol. The solid content of the mixed desulfurization solution is 48wt%~52wt%, and desulfurization is carried out at a temperature of 295~300K.
[0015] Preferably, the natural gas desulfurizer has a removal rate of 70%~75% for organic sulfur and a removal rate of 98%~99% for H2S.
[0016] Compared with the prior art, the present invention has the following beneficial technical effects: This invention discloses a natural gas desulfurizing agent comprising 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine in a molar ratio of (1~3):(2~4). 2-(2-morpholine-4-ethoxy)-ethanol contains a morpholine ring and an ethoxy functional group, exhibiting strong polarity and reactivity, thereby enabling it to interact with H2S and organic sulfur. During the desulfurization process, its polarity enhances the physical solubility of H2S and organic sulfur. Furthermore, the morpholine ring and ethoxy group in the structure can effectively bind with sulfides, effectively promoting the desulfurization reaction. N-Methyldiethanolamine (NME) exhibits high selectivity for H2S and low energy consumption during desulfurization. NME can react with H2S and organic sulfur to form intermediates such as thiolates or thiocarbonates, which can be further converted into stable sulfur forms in subsequent steps. The combined action of 2-(2-morpholine-4-ethoxy)ethanol and MDEA creates an effective synergistic effect, accelerating the conversion of sulfides. Furthermore, the molar ratio of 2-(2-morpholine-4-ethoxy)ethanol to NME is (1~3):(2~4), ensuring more efficient utilization of the active components in the desulfurizer during the reaction, thereby improving the overall desulfurization effect. In conclusion, this natural gas desulfurizer can effectively remove H2S and organic sulfur, demonstrating highly efficient desulfurization and thus possessing broad application prospects in the field of natural gas desulfurization.
[0017] Furthermore, this invention also discloses a method for preparing the above-mentioned natural gas desulfurizing agent. Specifically, firstly, morpholine and 2-chloroethoxyethanol are mixed evenly and then methanol is added for reaction. After the reaction is completed, the pH of the system is adjusted to neutral and refluxed. After the reaction is completed, the reaction solution is filtered and the filtrate is distilled under reduced pressure to obtain the 2-(2-morpholine-4-ethoxy)-ethanol. Then, the 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine are mixed evenly to obtain the natural gas desulfurizing agent. This method is simple, low in cost, and has a good desulfurization effect.
[0018] Furthermore, the molar ratio of morpholine to 2-chloroethoxyethanol is (1~0.5):(3~1), which maximizes the yield of the target product and minimizes byproducts.
[0019] Furthermore, the molar ratio of morpholine to 2-chloroethoxyethanol is 3:1, which maximizes the yield of the target product.
[0020] Furthermore, the amount of methanol added is 1-10%, which can make the reaction more complete.
[0021] Furthermore, the reaction involves mixing morpholine and 2-chloroethoxyethanol evenly and then adding methanol for reaction at a temperature of 120-180°C for 2-5 hours, which maximizes the yield of the target product.
[0022] Furthermore, the reflux reaction is carried out at a temperature of 65-75°C for 55-65 minutes, which maximizes the yield of the target product.
[0023] Furthermore, the pressure of the vacuum distillation is 1~4 kPa and the time is 30~60 min, which can maximize the yield of the target product.
[0024] Meanwhile, this invention also discloses the application of the aforementioned natural gas desulfurizer in crude oil desulfurization. Specifically, 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine are dissolved in water at a molar ratio of (1~3):(2~4) to prepare a mixed desulfurization solution of 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanol. The solid content of the mixed desulfurization solution is 48~52wt%, and a desulfurization evaluation experiment is conducted at a temperature of 295~300K. This solid content allows for good desulfurization effect while maximizing economic benefits. This desulfurization temperature is similar to that of on-site solvent desulfurization. Attached Figure Description
[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a process flow diagram for desulfurization. Detailed Implementation
[0027] To enable those skilled in the art to understand the features and effects of the present invention, the terms and expressions used in the specification and claims are explained and defined in general below. Unless otherwise specified, all technical and scientific terms used herein have the ordinary meaning understood by those skilled in the art regarding the present invention, and in case of conflict, the definitions in this specification shall prevail.
[0028] The theories or mechanisms described and disclosed herein, whether right or wrong, should not in any way limit the scope of the invention, that is, the contents of the invention can be implemented without being limited by any particular theory or mechanism.
[0029] In this document, all features defined by numerical ranges or percentage ranges, such as numerical values, quantities, contents, and concentrations, are for the sake of brevity and convenience only. Accordingly, descriptions of numerical ranges or percentage ranges should be considered as covering and specifically disclosing all possible sub-ranges and individual numerical values (including integers and fractions) within those ranges.
[0030] In this article, unless otherwise specified, “contains,” “includes,” “containing,” “has,” or similar terms cover the meanings of “composed of” and “mainly composed of,” for example, “A contains a” covers the meanings of “A contains a and others” and “A contains only a.”
[0031] For the sake of brevity, not all possible combinations of the technical features in each implementation scheme or embodiment are described herein. Therefore, as long as there is no contradiction in the combination of these technical features, the technical features in each implementation scheme or embodiment can be combined arbitrarily, and all possible combinations should be considered within the scope of this specification.
[0032] The present invention provides a natural gas desulfurizing agent comprising 2-(2-morpholino-4-ethoxy)-ethanol and N-methyldiethanolamine in a molar ratio of (1~3):(2~4).
[0033] The above-mentioned method for preparing a natural gas desulfurizing agent includes the following steps: S1: Morpholine and 2-chloroethoxyethanol are mixed evenly and then methanol is added. The mixture is reacted at 120~180℃ for 2~5h. After the reaction is completed, the pH of the system is adjusted to neutral and the mixture is refluxed at 65~75℃ for 55~65min. After the reaction is completed, the reaction solution is filtered and the filtrate is distilled under reduced pressure at 1~4Kpa for 30~60min to obtain the 2-(2-morpholine-4-ethoxy)-ethanol. The molar ratio of morpholine to 2-chloroethoxyethanol is (1~0.5):(3~1), with a preferred molar ratio of 3:1. The amount of methanol added is 1 wt% to 10 wt% of the mixed solution of morpholine and 2-chloroethoxyethanol. S2: The natural gas desulfurizer is prepared by mixing 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine in a molar ratio of (1~3):(2~4).
[0034] Furthermore, this invention also discloses the application of the aforementioned natural gas desulfurizer. In use, the natural gas desulfurizer is dissolved in water to prepare a mixed desulfurization solution of 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanol. The solid content of the mixed desulfurization solution is 48wt%~52wt%, and desulfurization is carried out at a temperature of 295~300K. The natural gas desulfurizer has a removal rate of 70%~75% for organic sulfur and a removal rate of 98%~99% for H2S.
[0035] in addition, Figure 1 This is a process flow diagram for desulfurization. Acidic feed gas enters the absorption tower from the bottom after passing through an inlet separator, where it absorbs H2S and organic sulfur. The purified gas exits from the top of the absorption tower, while the rich liquid exits from the bottom and enters a flash tank to depressurize and release acidic gases and some hydrocarbons. Some heat is recovered from the solvent through heat exchange, and the solvent is recycled.
[0036] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.
[0037] The following examples use instruments and equipment conventional in the art. Experimental methods in the following examples, unless otherwise specified, are generally performed under conventional conditions or as recommended by the manufacturer. All raw materials used in the following examples are conventional commercially available products with specifications conventional in the art. In this specification and the following examples, unless otherwise specified, "%" refers to weight percentage, "parts" refers to parts by weight, and "ratio" refers to weight proportion.
[0038] Example 1 This embodiment prepares a natural gas desulfurizing agent, and the specific preparation method is as follows: First, 1 part of morpholine and 0.5 parts of 2-chloroethoxyethanol are mixed evenly and added to a high-temperature and high-pressure reactor. A certain amount of methanol is added as a solvent. The reaction is carried out at 180°C for 4 hours. After cooling, the mixture is poured out, and a certain amount of NaOH is added. The mixture is then refluxed at 70°C for 1 hour. After filtration, the filtrate is cold-distilled under reduced pressure to obtain solid 2-(2-morpholine-4-ethoxy)-ethanol. Then, the obtained 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine are mixed evenly at a molar ratio of 1:3 to prepare a 50wt% aqueous solution to obtain a natural gas desulfurizing agent. Example 2 This embodiment prepares a natural gas desulfurizing agent, and the specific preparation method is as follows: First, 2 parts of morpholine and 1 part of 2-chloroethoxyethanol were mixed evenly and added to a high-temperature and high-pressure reactor. A certain amount of methanol was added as a solvent, and the mixture was reacted at 180°C for 4 hours. After cooling, the mixture was poured out, and a certain amount of NaOH was added. The mixture was then refluxed at 70°C for 1 hour. After filtration, the filtrate was cold-distilled under reduced pressure to obtain solid 2-(2-morpholine-4-ethoxy)-ethanol. Then, the obtained 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine were mixed evenly at a molar ratio of 1:3 to prepare a 50wt% aqueous solution to obtain a natural gas desulfurizing agent. Example 3 This embodiment prepares a natural gas desulfurizing agent, and the specific preparation method is as follows: First, 3 parts of morpholine and 1 part of 2-chloroethoxyethanol were mixed evenly and added to a high-temperature and high-pressure reactor. A certain amount of methanol was added as a solvent, and the mixture was reacted at 180°C for 4 hours. After cooling, the mixture was poured out, and a certain amount of NaOH was added. The mixture was then refluxed at 70°C for 1 hour. After filtration, the filtrate was cold-distilled under reduced pressure to obtain solid 2-(2-morpholine-4-ethoxy)-ethanol. Then, the obtained 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine were mixed evenly at a molar ratio of 1:3 to prepare a 50wt% aqueous solution to obtain a natural gas desulfurizing agent.
[0039] Example 4 This embodiment prepares a natural gas desulfurizing agent, and the specific preparation method is as follows: First, 3 parts of morpholine and 1 part of 2-chloroethoxyethanol were mixed evenly and added to a high-temperature and high-pressure reactor. A certain amount of methanol was added as a solvent, and the mixture was reacted at 120°C for 2 hours. After cooling, the mixture was poured out, and a certain amount of NaOH was added. The mixture was then refluxed at 70°C for 1 hour. After filtration, the filtrate was distilled under reduced pressure to obtain solid 2-(2-morpholine-4-ethoxy)-ethanol. Then, the obtained 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine were mixed evenly at a molar ratio of 1:3 to prepare a 50wt% aqueous solution to obtain a natural gas desulfurizing agent.
[0040] Example 5 This embodiment prepares a natural gas desulfurizing agent, and the specific preparation method is as follows: First, 3 parts of morpholine and 1 part of 2-chloroethoxyethanol were mixed evenly and added to a high-temperature and high-pressure reactor. A certain amount of methanol was added as a solvent, and the mixture was reacted at 150°C for 3 hours. After cooling, the mixture was poured out, and a certain amount of NaOH was added. The mixture was then refluxed at 70°C for 1 hour. After filtration, the filtrate was cold-distilled under reduced pressure to obtain solid 2-(2-morpholine-4-ethoxy)-ethanol. Then, the obtained 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine were mixed evenly at a molar ratio of 2:3 to prepare a 50wt% aqueous solution to obtain a natural gas desulfurizing agent.
[0041] Example 6 This embodiment prepares a natural gas desulfurizing agent, and the specific preparation method is as follows: First, 3 parts of morpholine and 1 part of 2-chloroethoxyethanol were mixed evenly and added to a high-temperature and high-pressure reactor. A certain amount of methanol was added as a solvent, and the mixture was reacted at 180°C for 5 hours. After cooling, the mixture was poured out, and a certain amount of NaOH was added. The mixture was then refluxed at 70°C for 1 hour. After filtration, the filtrate was cold-distilled under reduced pressure to obtain solid 2-(2-morpholine-4-ethoxy)-ethanol. Then, the obtained 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine were mixed evenly at a molar ratio of 2:4 to prepare a 50wt% aqueous solution to obtain a natural gas desulfurizing agent.
[0042] The desulfurization rates of Examples 1-6 (products A-F, respectively) and N-methyldiethanolamine were measured at 298 K, and their removal rates of organic sulfur and H2S from natural gas were analyzed. The test results are shown in Table 1. Table 1. Comparison of desulfurization effects of the desulfurizing agents prepared in Examples 1-6
[0043] Example 7 A method for preparing a natural gas desulfurizing agent includes the following steps: S1: Morpholine and 2-chloroethoxyethanol were mixed evenly and then methanol was added. The mixture was reacted at 120°C for 5 hours. After the reaction was completed, the pH of the system was adjusted to neutral and the mixture was refluxed at 65°C for 65 minutes. After the reaction was completed, the reaction solution was filtered and the filtrate was distilled under reduced pressure at 1 kPa for 60 minutes to obtain the 2-(2-morpholine-4-ethoxy)-ethanol. The molar ratio of morpholine to 2-chloroethoxyethanol is 1:3. The amount of methanol added is 1 wt% of the mixed solution of morpholine and 2-chloroethoxyethanol. S2: The natural gas desulfurizing agent is prepared by mixing 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine in a molar ratio of 1:2.
[0044] Example 8 A method for preparing a natural gas desulfurizing agent includes the following steps: S1: Morpholine and 2-chloroethoxyethanol were mixed evenly and then methanol was added. The mixture was reacted at 180℃ for 2 hours. After the reaction was completed, the pH of the system was adjusted to neutral and the mixture was refluxed at 75℃ for 55 minutes. After the reaction was completed, the reaction solution was filtered and the filtrate was distilled under reduced pressure at 4 kPa for 30 minutes to obtain the 2-(2-morpholine-4-ethoxy)-ethanol. The molar ratio of morpholine to 2-chloroethoxyethanol is 0.5:1. The amount of methanol added is 10 wt% of the mixed solution of morpholine and 2-chloroethoxyethanol. S2: The natural gas desulfurizing agent is prepared by mixing 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine in a molar ratio of 3:4.
[0045] Example 9 A method for preparing a natural gas desulfurizing agent includes the following steps: S1: Morpholine and 2-chloroethoxyethanol were mixed evenly and then methanol was added. The mixture was reacted at 150°C for 3 hours. After the reaction was completed, the pH of the system was adjusted to neutral and the mixture was refluxed at 70°C for 60 minutes. After the reaction was completed, the reaction solution was filtered and the filtrate was distilled under reduced pressure at 3 kPa for 40 minutes to obtain the 2-(2-morpholine-4-ethoxy)-ethanol. The molar ratio of morpholine to 2-chloroethoxyethanol is 0.8:3. The amount of methanol added is 5 wt% of the mixed solution of morpholine and 2-chloroethoxyethanol. S2: The natural gas desulfurizing agent is prepared by mixing 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine in a molar ratio of 2:3.
[0046] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.
[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.
Claims
1. A natural gas desulfurizing agent, characterized in that, It includes 2-(2-morpholino-4-ethoxy)-ethanol and N-methyldiethanolamine in a molar ratio of (1~3):(2~4).
2. The method for preparing a natural gas desulfurizing agent as described in claim 1, characterized in that, Includes the following steps: S1: Morpholine and 2-chloroethoxyethanol are mixed evenly and then methanol is added to react. After the reaction is completed, the pH of the system is adjusted to neutral and refluxed. After the reaction is completed, the reaction solution is filtered and the filtrate is distilled under reduced pressure to obtain the 2-(2-morpholine-4-ethoxy)-ethanol. S2: The natural gas desulfurizer is prepared by mixing 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanolamine evenly.
3. The method for preparing a natural gas desulfurizing agent according to claim 2, characterized in that, The molar ratio of morpholine to 2-chloroethoxyethanol is (1~0.5):(3~1).
4. The method for preparing a natural gas desulfurizing agent according to claim 2, characterized in that, The molar ratio of morpholine to 2-chloroethoxyethanol is 3:
1.
5. The method for preparing a natural gas desulfurizing agent according to claim 2, characterized in that, The amount of methanol added is 1 wt% to 10 wt% of the mixed solution of morpholine and 2-chloroethoxyethanol.
6. The method for preparing a natural gas desulfurizing agent according to claim 2, characterized in that, The mixture of morpholine and 2-chloroethoxyethanol is homogeneous and then methanol is added to carry out the reaction. The reaction temperature is 120~180℃ and the reaction time is 2~5h.
7. The method for preparing a natural gas desulfurizing agent according to claim 2, characterized in that, The reflux reaction is carried out at a temperature of 65-75°C for 55-65 minutes.
8. The method for preparing a natural gas desulfurizing agent according to claim 2, characterized in that, The pressure of the vacuum distillation is 1~4 kPa, and the time is 30~60 min.
9. The application of the natural gas desulfurizing agent as described in claim 1 in crude oil desulfurization, characterized in that, The natural gas desulfurizing agent is dissolved in water to prepare a mixed desulfurization solution of 2-(2-morpholine-4-ethoxy)-ethanol and N-methyldiethanol. The solid content of the mixed desulfurization solution is 48wt%~52wt%, and desulfurization is carried out at a temperature of 295~300K.
10. The application of the natural gas desulfurizing agent as described in claim 9 in crude oil desulfurization, characterized in that, The natural gas desulfurizer has a removal rate of 70%~75% for organic sulfur and a removal rate of 98%~99% for H2S.