TW382617B - Process for the recovery of sulfur from SO2 containing gases - Google Patents

Abstract

The invention relates to a process for recovering sulfur from an SO2 containing gas stream through catalytic conversion thereof to elemental sulfur, comprising converting SO2 and H2S in the presence of liquid sulfur and a catalyst system based on a heterogeneous catalyst which catalyzes the Claus reaction, while as promoter for the Claus reaction a basic nitrogen compound is present in the liquid sulfur.

Description

A7 B7 V. Description of the invention Printed by the Shellfish Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Amendment 8 & 9. 2 3] Tai Ge uses T3 * sulfur, and is then withdrawn from the gas passed by Claus through the thermal step. 1 8 · 87 kmol / h of 02 as air oxygen was supplied to the thermal step. Another 1.40 kmol / h of O2 as air oxygen was supplied to the SUPERCLAUS step. After the SUPERCLAUS step, the volume percentage of H2S in the exhaust gas is 0 * 032%, and the content of S02 is 0. 189% by volume, and the content of 02 is 0. 50% by volume. The number of steps from SUPERCLAUS is 12 22 kmol / h, the temperature is 130 ° C, and the pressure is 1. 13 bar (absolute). The exhaust gas is supplied to the catalyst bed described in FIG. 3. Liquid sulfur from the contact vessel passes through the bed. Add tertiary alkanolamine (TEA) to liquid sulfur. The sulfur then returns to the contact medium container. The number of circulating flows is set so that a sufficient Hz S relative to S02 is supplied to the catalyst bed so that the ratio of HZ S: S 0 2 is at least 1: 1. The H2S concentration in the outlet gas was 0.015% by volume, and the SOZ volume percentage thereof was 0.011% by volume. The conversion rate of sulfur S to sulfur in the reactor was therefore 92%, while the conversion rate of S02 was 94%. • With the SUPERCLAUS reactor step, followed by this reactor step (where the reaction between H2S and S02 is performed in liquid sulfur), the overall sulfur recovery rate of the Claus plant exceeds 99.5%. Brief description of the drawings Figure 1 is a schematic diagram of recovering sulfur from sulfur dioxide; Figure 2 is another schematic diagram of recovering sulfur from sulfur dioxide through a Claus factory; -14- This paper is applicable to China Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page)

Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 V. Description of Invention (/) In many methods, such as petroleum refining, purification of natural gas, and production of complete gas from plutonium or petroleum residues, sulfur-containing gases are released. Especially H2 S. This H2S must be removed before the above gases can be used. The most important reason for the removal of H 2 S is to prevent the emission of S02 when the plutonium 2 S is burned. At the same time, H2S is a very toxic gas and has a foul odor is well known. The most commonly used method in the industry is to remove HZ S through a liquid adsorbent, thereby converting H2 S into a concentrated form, and then converting the H2 S gas into a harmless sulfur element. In addition, in many cases, the first step may be omitted, that is, H 2 S is formed into a concentrated form, and Hz S is directly converted into sulfur. One of the most widely known and widely used methods to convert H2S to sulfur is the so-called Claus process. This Claus method is performed in different ways, depending on the H2S content in the feed gas. According to the most traditional specific embodiment, a part of H2S is burned to SO2, and then further reacts with the remaining H2S to form sulfur jil. A detailed description of the Claus method can be found in RN Maddox "Gas and Liquid Sweetening"; Campbell Petroleum Series (1977) pp. 239-243 and HG Paskall ^ Capabilities of the Modified Claus Process ", pu b 1. Western Research & Development, Calgary, Alberta, Canada (179 7) 〇 Klaus's method is based on the following reactions: This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the notes on the back first (^^ write this page)

Order

V. Description of the Invention (/ 3) FIG. 3 illustrates a preferred embodiment of the present invention. The description of the symbol of the essential components is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 1 Pipeline 2 Reactor 3 Catalyst 4 Pipeline 5 Pipeline 6 Pipeline 7 Cooler 8 Pump 9 Pipeline 1 0 Claus Factory 1 1 Pipeline 1 2 Pipeline 1 3 Pipeline 1 4 Pipeline 1 5 Super Klaus Plant 1 6 Pipeline 1 7 Pipeline 1 8 String 1 9 Pipeline 2 0 Pipeline 2 1 Pump -15- This paper size applies to China National Standard (CNS) A4 (210 X 297 male) (%) (Please read the notes on the back before filling in this page) .0 Pack · d. Printed by the Consumers 'Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 ___B7_ Five' Invention Description (l) 2Hz S + 3〇2 points 2H2 0 + 2S02 (1) 4H2 S + 2S0Z <-> 4H2 〇 + 6 / nSn (2) Reaction (1) and reaction (2) cause the following total reaction 2Hz S + 〇2; ^ > 2H2 〇 + 2 / nSn ( 3) A conventional Claus plant suitable for processing H2S containing between 50 and 100% gas includes a thermal step (burner, combustion chamber, exhaust gas container, and sulfur condenser) followed by multiple reactions, typically two or three reactions Reactor step (gas heating, reactor filled with catalyst, and sulfur condenser). Reaction (1) and reaction (2) occur in the thermal step, while only reaction (2), which is known as the Claus reaction, is used in the reactor step. However, in the Claus method, H2S is not completely converted to sulfur, mainly because the Claus equilibrium reaction (2) does not react completely. So there will be a certain amount of H2 S and S02 remaining. In view of the increasingly stringent environmental protection regulations, the practice of burning the above-mentioned residual gases is no longer allowed. The exhaust gas must be further desulfurized. The exhaust gas method is well known to those skilled in the art, such as documented in BG Goar, Tail Gas Clean-up Processes, a review, paper at the 33rd Annual Gas Conditioning Conference, Norman, Oklahoma, March 7- 9, 1 9 8 3 〇The most famous and by far the most effective method for exhaust gas desulfurization is the SCOT method described in Maddox's "Gas and liuqid sweetening" (1977). The SCOT method achieves a sulfur recovery of 99.8 to 99.9%. The disadvantages of the SCOT method are the high investment cost and the -4- paper size applicable to the Chinese National Standard (CNS) A4 size (210 X 297 mm) (Please read the precautions on the back first \ $ ^ write this page)

+ ° A7 B7 丨 Amendment, this month and day 5. Description of the invention (/ 〆) 2 2 Cooler (Please read the precautions on the back before filling out this page) Printed on the paper. Applicable to the paper by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs China National Standard (CNS) A4 (210 X 297 mm) A7 __B7___ printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs. 5. Description of the invention (3) Excessive energy dissipation. Another method to increase the efficiency of the Claus method is the SUPERCLAUS® method. This method can increase the efficiency of the Claus method from 94-97% to more than 99%. The SIIP ERCLAUS ® method is described in "SUPERCLAUS ®, the answer to Claus plant limitations" pub 1. 38th Canadian Chem. Eng. Conference, Oct, 25, 1 9 88, Edmonton, Alberta, Canada The exhaust gas treatment method is low. The reaction in the thermal step and the Claus reactor step (2) is operated under excess H2S, so in the gas from the last Claus reactor step, the H2S content is about 1% by volume and the S02 content is about 02% volume. In the step of connecting the downstream reactor, under the use of a special selective gasification catalyst, H2 S is selectively gasified to sulfur element 2 H z S + 〇z ^ 2Hz O + 2 / nSn (4 These catalysts are described in European patents 0429920 and 0403353. The tail gas from the SUPERLCAUS® reactor step still contains an SO2 content of 0.02% by volume and about 0.2% by volume of SOz, and 0.2 to 0.5% by volume of 02. Another Claus method is described in U.S. Patent 4,280,990 (Jagodzinski et al.). The Claus reaction (2) is performed in liquid sulfur under high pressure in the presence of a standard Claus catalyst, Without cold-5- (Please read the precautions on the back first

(Installation-this page) The paper size is applicable to the Chinese National Standard (CNS) A4 (210X297 mm). Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. In this method, the thermal step 僳 is performed at a pressure of 5 to 50 bar, after which the existing gas passes through the reactor filled with catalyst under the same pressure. The reaction between H2 S and S02 therefore takes place at a pressure of 5 to 50 bar, whereby the sulfur condenses on the catalyst. The liquid sulfur passes through the catalyst bed to circulate the heat of reaction. The gas from the thermal step contains about 7.9% by volume of H2S and 3.95% by volume of S02, so S: S02 is 2: 1. The reactor temperature in the first bed was set so that the outlet temperature was 2 7 5¾. The outlet temperature of the second bed was set at 1951C. From the examples of this method, it can be deduced that these high percentages of H 2 S and S 0 2 will have better conversion rates under increased pressure. Alternatively, the same method is recommended for the desulfurization of Claus exhaust gas. In this case, Claus tail gas is placed under high pressure. The disadvantages of desulfurization methods for Claus gas and Claus tail gas are the high cost of H2S gas (Claus feed gas) and air compressors, and the high cost of tail gas compressors. These compressors High energy consumption, the danger of toxic Hz S gas leaking out of compressors and other plant equipment, and the operational reliability of these compressors. This is why this method has never been used commercially. In the method described in U.S. Patent No. 4,280,990, a standard Claus catalyst is used. During the period of the above patent, active gasified aluminum hafnium was used as a Claus catalyst, and its surface area was about 300 m 2 / gr and the average pore size was about 50A. This catalyst is also described in U.S. Patent 4,280,990. This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm). (Please read the precautions on the back first and write this page.) D Ordered by the Consumer Standards Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs to print A7 B7 'V. Invention Description (Dead). In the years when this method was developed, standard Claus gasified aluminum catalysts were used in Claus reactors. Therefore, no research has been conducted on other types of catalysts, or the catalysts have not yet come out or have not yet been developed. Nor has any research been done on working pressures depending on H2S and SOz concentrations. Most of the tests described in U.S. Patent No. 4,280,990 use 2 · 5% volume Hz S and 1.2% volume S02. U.S. Patent 3,447,903 shows another method which is also based on the application of the Claus method using liquid sulfur. According to this method, the reaction is promoted in the presence of withdrawal of basic nitrogen compounds. It is seen from the examples that this compound is used in an amount of about 1 to 50 ppm. This method has never been used commercially. An object of the present invention is to provide a method for recovering sulfur in exhaust gas, thereby removing S02 and ^ {2S as much as possible. What's more, the purpose of the present invention is to provide a method to improve the traditional method for recovering sulfur, so as to achieve a high-return-gram U-agent phase-change medium, t-to-multi-turn-to-promote, etc. After the application of sulfide and sulfide, the sulfide and sulfide M smine solution were collected and replaced by W Laofa. Include U for the purpose of improving the efficiency of the air bag P for development and reform 2 method. After receiving 0 square}, the material has been cleared back to 3, 0113, to the mold contains, ti2 is the standard method of acH nitrogen and the nature of the 2 basic startle, the supply of uso has When the percentage of las las in the sensation 5 bright sulfur (C for sulfur into the people. Issued as a response to the order to promote the 9 into the liquid 9 is very low, and so on, the media when the labor changes, this paper applies China standards National Standard (CNS) A4 specification (210X 297 mm) 5. Invention description rate. In this way, the use of liquid sulfur as a reaction medium has been known for a long time. However, it is only possible to use low pressure at low pressure using the method of the present invention. That is, the method is carried out at atmospheric pressure or slightly above atmospheric pressure. This method can be carried out in a variety of ways. It is important that the catalyst directly contacts the liquid sulfur that is sufficiently supplied from the outside. It is preferred that this liquid already contains tritium The converted H2 S, because the conversion efficiency is significantly higher. Therefore, it is possible to supply the gas phase Hz S and S0Z, but it will reduce the efficiency. In the method of the present invention, H2 S and S02 react to become sulfur and water hydration with H2 S: S02 is 2: 1 and in the presence of a suitable catalyst and liquid sulfur, The preferred pressure is between 1 and 5 bar, and the temperature is preferably between 120 υ and 250 Ϊ: In the method of the present invention, suitable catalysts have a roocropore structure. These include having a small withdrawal Activated alumina with pores and large volumes of meso and macro pores. The meso, macro and superstructures of these activated gasified aluminum contain more than 65% of the total pore volume. It is also possible to use those with these as support materials Catalysts, this support material has been impregnated with active materials, such as metal oxides. These catalysts are often referred to as 〃promoting catalysts〃. In general, it can be said that those catalysts can effectively catalyze the Claus reaction. Except as already discussed Besides conventional activated gasification aluminum catalysts, other conventional catalysts for this reaction are also suitable for use, such as titanium digasification, and metal vapors on a support.

It has been found that when water vapor is input to the gas to be treated at a pressure of less than 5 bar, or when water vapor is present in the gas, it will promote H2 S — 8-This paper applies the Chinese National Standard (CNS) 8-4 Specifications (210X297 mm) Please read the note and write this page. The Central Government Bureau of the Ministry of Economic Affairs printed the decomposed gas A7 B7. 5. The description between the invention (*)) and SO2 becomes sulfur and water. At the same time, efficiency can be greatly affected by proper choice of dwell time. It has also been determined that under pressures below 5 bar, when sulfides are present in the sulfur, these will react to sulfur and water in the same way as H2S. It was found that when the gas contains gas, the gas hardly reacts with H2S or the sulfur present to form SOz. The main advantage of the method of the present invention is that it reacts under low pressure and therefore resolves all the disadvantages of the method of U.S. Patent 4,280,99. In the method of the present invention, H2S gas can also be added to these bodies or H2S can be dissolved in liquid sulfur to process S02-containing gas. Please read _ read-back _ of-note-matters-Central Bureau of Standards, Ministry of Economic Affairs Employee consumer cooperatives printed on this, will get the conversion S 0 Η 2 S according to the order with a small amount of water conversion Jinping suitable M EA,), ammonia, in the preferred invention method, S 0 2 is better than 髙 Z It needs Η 2 to be stored in sulfur. People are surprised at the efficiency of basic nitrogen compounds. The basic nitrogen compounds are DGA, DE ammonium salts, and aromatic nitrogen. The third conversion rate has been determined. The term S is greatly simplified because Hz S can be added after dissolution. It is found that when the present invention, Hz S and So are improved, even when setting amines (such as alkylamines), A, DIPA, MD compounds (such as Quinoline, alkanolamine, because it will not -9- dissolve unused loaded sulfur needed to control the solution when dissolved in liquid sulfur. The sulfur in the method reacts to sulfur and the temperature reaches the actual alkanolamine (such as EA. TEA morpholine). Forms a high boiling point The size of the paper is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) A7 B7 V. Description of the invention (7) Sulfamate, and because these amines are quite cheap. The present invention will be made clearer by referring to the following drawings. In FIG. 1, a gas containing H2S and S02 is fed to a reactor 2 having a catalyst 3 via a line 1 and a liquid sulfur is supplied via a line 4 to pass through the catalyst together with a feed gas. The reaction of Hz S and SOz is generated in the catalyst bed.

After the reaction between Hz S and S02, the outlet gas is discharged through line 5. Please read ^ read back-note

I Printed by the Central Bureau of Standards of the Ministry of Economic Affairs, the consumer cooperative printed a liquid reactor 2 〇 In-vivo via the next two grams and the anti-reaction 1 3 Passed by sulfur to form the pipeline 5 formed by the pipeline state sulfur from the reverse. In Figure 2 formed by chestnut 8, line 1 is still supplied to the catalyst-containing anti-Rolls reactor reactor step after the sulfur containing line 4 is sulfurized, and the sulfur leaving the reaction is supplied to the reactor through the sulfur assisted by 14 Contains a supply of super-supply to the required step and then contains a catalyst supply. Exhaust gas passes through the pipeline, and line 9 is added. From the line 6 to the cooler 7, the sulfur is recycled to the reaction line 9 via the line 4 and discharged. Hz S gas containing 90% by volume of H2S. Claus plant 10, which includes a thermal step and air is supplied via line 11. Sulfur in the thermal step is discharged via pipe 12. The tail gas from the second thorium 2 S and S 0 2 passes through the reactor 2 of the line 3. From the catalyst bed, the liquid reacts in H2S and S02 in the catalyst bed and leaves the reactor through line 5. Liquid sulfur is circulated to the reactor 2 via a cooler 7. Was discharged. Alternatively, the basic nitrogen compounds can be applied to the paper size of -10. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) A7 B7 V. Description of the invention (7) Figure 3 is a pseudo description of the method of the present invention. In a specific embodiment, the Krypton 2 S-containing gas is supplied to the Claus plant 10 via line 1, which includes a thermal step, followed by two catalyst reaction steps. The air required for the Claus reaction is supplied via line 11. The sulfur formed in the thermal step and the reactor step is discharged via the pipe 12. The tail gas from the second catalyst reactor step still containing Hz S and S02 is supplied via line 13 to the SUPERCLAUS plant 15. The selectively oxidized air is supplied through a line 16 while liquid sulfur is discharged through a line 17. The exhaust gas radon is supplied to the reactor 2 containing the catalyst 3 via a line 13. Liquid sulfur is supplied through the catalyst bed via line 4. This liquid sulfur comes from the pipe string 18, where the sulfur has been in contact with the H2S-containing gas passing through the Claus plant line 1. In column 18, liquid sulfur has merged a portion of the H2S from the gas. After H2S and S02 dissolved in liquid sulfur react in the catalyst bed to become sulfur, the tail gas leaves the reactor through line 5. Liquid sulfur leaves reactor 2 via line 6 and is circulated to line 18 via line 19 under the pump 8 ribs. The sulfur formed is dissolved in line 9. Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs In the pipe column, sulfur absorbs H2S again and is supplied to reactor 2 via line 20, pump 2 1, cooler 2 2 and line 4 again. Optionally, basic nitrogen compounds can be supplied to the liquid sulfur via line 1 4. The invention will be further illustrated in the following examples. Example 1 -11- This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) Printed by A7, _B7 _______, the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs As shown in the plant shown in Figure 2, in the Claus plant with two catalyst steps, the Claus reaction is performed. The heat step is supplied with Claus gas containing 90. 0% by volume H2S, which is equivalent to 36. 0 kmol / h, 3.5% by volume CO2, 2.0% by volume hydrocarbons and 4.5% by volume H2 0 and 19.5 kmol / h as air gas. Second catalyst step After that, the volume percentage of HZ S in the tail gas was 0.5 8% by volume, and the content of S02 was 0.29% by volume, and the content of water was 33.2% by volume. The sulfur recovery efficiency of the Claus plant was 94%. Tail gas at a rate of 120 Nmol / h, a temperature of 15010, and a scraping force of 1.13 bar was supplied to the catalyst bed of Fig. 2. Catalyst 3 was activated gasified aluminum with a highly medium and macroporous structure. The amount of liquid sulfur of 50 m³ / h and temperature of 15 ου was circulated through the catalyst bed. The produced method was heated by reaction and discharged in the cooler, so that The temperature of the episulfur remains fixed. In order not to cause the sulfur level in the reactor to rise too high, some sulfur is emitted from the system from time to time. The volume percentage of H2S in the gas after the catalyst bed is // 188%, and The volume percentage of S02 is 0.088%. The conversion rate of Hz S to sulfur in the reactor is 68%, and S0 2 is 70%. According to this reactor step (the reaction between Η 2 S and S ◦ 2 The total sulfur recovery efficiency of the Claus plant in the reaction of liquid sulfur) is above 97. 7%. Please read first-back

I note

Order example 2 -12 This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) Printed by the Consumers Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 'V. Description of the invention (f /) As shown in Figure 2 In the same plant, an aromatic amine (quinoline) was added to the circulating sulfur via line 14. The amount of quinoline supplied was such that the sulfur concentration in the reactor was 500 ppm by weight. The Claus gas to the thermal step is the same as described in Example 1, but now 19.85 kmol / h 02 is supplied as air gas to obtain

H2S in the tail gas after the second catalyst step-so much SOz. The volume percentages of Hz S and S02 in the exhaust gas are each 0.46%, and the water content thereof is 33.0% by volume. The volume fraction of Hz S in the exhaust gas after the catalyst bed is 0.0046%, and the volume fraction of S02 is 0.018%. The conversion rate of H2S to sulfur in the reactor is therefore 90%, while S02 is 96%. 0% 之间。 According to this reactor step (the reaction between Hz S and S02 occurs as liquid sulfur) the total sulfur recovery efficiency of the Claus plant is 99.0% or more. Example 3 In the plant shown in FIG. 3, the SURPERCLAUS reactor step is arranged after the second catalyst step of the Claus plant, and the H2S in the gas from the second catalyst step is selectively gasified to sulfur . The tail gas from the SUPERCLAUS step is supplied to the catalyst bed as described in FIG. 3. Before the gas passes through the thermal step, Claus gas first contacts the sulfur gas in the contact vessel in a convective manner; The Claus gas flowing into the contact vessel is the same as in Example 1. In the contact container, 193 kmol / h Hz S is dissolved in -1 3-This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the notes on the back first Matters ^ k this page) Order _ A7 B7 V. Description of the invention Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Shellfish Consumer Cooperative, amended 8 & 9. 2 3] Taige uses T3 * sulfur, and then from Claus through the thermal step Into the radon gas was withdrawn. 1 8 · 87 kmol / h of 02 as air oxygen was supplied to the thermal step. Another 1.40 kmol / h of O2 as air oxygen was supplied to the SUPERCLAUS step. After the SUPERCLAUS step, the volume percentage of H2S in the exhaust gas is 0 * 032%, and the content of S02 is 0. 189% by volume, and the content of 02 is 0. 50% by volume. The number of steps from SUPERCLAUS is 12 22 kmol / h, the temperature is 130 ° C, and the pressure is 1. 13 bar (absolute). The exhaust gas is supplied to the catalyst bed described in FIG. 3. Liquid sulfur from the contact vessel passes through the bed. Add tertiary alkanolamine (TEA) to liquid sulfur. The sulfur then returns to the contact medium container. The number of circulating flows is set so that a sufficient Hz S relative to S02 is supplied to the catalyst bed so that the ratio of HZ S: S 0 2 is at least 1: 1. The H2S concentration in the outlet gas was 0.015% by volume, and the SOZ volume percentage thereof was 0.011% by volume. The conversion rate of sulfur S to sulfur in the reactor was therefore 92%, while the conversion rate of S02 was 94%. • With the SUPERCLAUS reactor step, followed by this reactor step (where the reaction between H2S and S02 is performed in liquid sulfur), the overall sulfur recovery rate of the Claus plant exceeds 99.5%. Brief description of the drawings Figure 1 is a schematic diagram of recovering sulfur from sulfur dioxide; Figure 2 is another schematic diagram of recovering sulfur from sulfur dioxide through a Claus factory; -14- This paper is applicable to China Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page)

V. Description of the Invention (/ 3) FIG. 3 illustrates a preferred embodiment of the present invention. The description of the symbol of the essential components is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 1 Pipeline 2 Reactor 3 Catalyst 4 Pipeline 5 Pipeline 6 Pipeline 7 Cooler 8 Pump 9 Pipeline 1 0 Claus Factory 1 1 Pipeline 1 2 Pipeline 1 3 Pipeline 1 4 Pipeline 1 5 Super Klaus Plant 1 6 Pipeline 1 7 Pipeline 1 8 String 1 9 Pipeline 2 0 Pipeline 2 1 Pump -15- This paper size applies to China National Standard (CNS) A4 (210 X 297 male) (%) (Please read the precautions on the back before filling this page) .0 packs · d. A7 B7 丨 revised, this year, month and day 5. Description of the invention (/ 〆) 2 2 Cooler (Please read the precautions on the back first (Fill in this page again.) Printed on the paper by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Applicable to China National Standard (CNS) A4 (210 X 297 mm).

Claims (1)

Ben Lu Gong 888 8 ABCD Zheng, Yi Xiu ^ 6. Scope of Patent Application 1 ♦ A method for recovering sulfur from S02-containing gas, which is to convert the M catalyst into sulfur element. The method includes the method of promoting sulfur content in liquid sulfur and promoting the Claus reaction. In the presence of a catalyst-based catalyst system, S02 and H2S are converted. When used as an accelerator for the Claus reaction, there are basic nitrogen compounds in the liquid sulfur. The accelerator is selected from the group consisting of amines and alkylamines. Group of alkanolamines, ammonia, ammonium salts, and aromatic nitrogen compounds, and the catalysts can be titanium dioxide, activated alumina, and supported metal oxides, respectively at 1 to 5 bar and 1 20 ¾ to 2 5.0 ° C Under pressure and temperature. 2. The method according to item 1 of the scope of patent application, wherein the accelerator is selected from the group consisting of monoacetam, diethanolamine, DGA, DIPA, MDEA and triethanolamine. 3. If the method of applying for the scope of patents 1 or 2 is printed, which is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economics of the Tertiary Amine 4. If the method of applying for the scope of patents, the method of claim 1 Catalyst-based porous alumina or porous alumina provided with a metal oxide. 5. The method according to item 4 of the scope of patent application *, wherein the surface area v of the alumina is at least 150 square meters per gram. This paper uses the Chinese national standard (CNS > A4 size (210X297 mm)) Ben Lu Gong 888 8 ABCD Zheng, Yi Xiu ^ 6. Scope of Patent Application 1 ♦ A method for recovering sulfur from S02-containing gas, which is to convert the M catalyst into sulfur element. The method includes the method of promoting sulfur content in liquid sulfur and promoting the Claus reaction. In the presence of a catalyst-based catalyst system, S02 and H2S are converted. When used as a promoter for Claus reaction, there are basic nitrogen compounds in liquid sulfur. The promoter is selected from the group consisting of amines, alkylamines Group of alkanolamines, ammonia, ammonium salts, and aromatic nitrogen compounds, and the catalysts can be titanium dioxide, activated alumina, and supported metal oxides, respectively at 1 to 5 bar and 1 20 ¾ to 2 5.0 ° C Under pressure and temperature. 2. The method according to item 1 of the scope of patent application, wherein the accelerator is selected from the group consisting of monoacetam, diethanolamine, DGA, DIPA, MDEA and triethanolamine. 3. If the method of applying for the scope of patents 1 or 2 is printed, which is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economics of the Tertiary Amine 4. If the method of applying for the scope of patents, the method of Clause 1 is used. Catalyst-based porous alumina or porous alumina provided with a metal oxide. 5. The method according to item 4 of the scope of patent application *, wherein the surface area v of the alumina is at least 150 square meters per gram. This paper uses the Chinese national standard (CNS > A4 size (210X297 mm)) A8 B8 C8 D8 printed by the Shelley Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 6. The scope of patent application 6. ¾¾ Please deduct the method of sickle encirclement 5, where the pore volume in the pores with a diameter of 5nm or M (K nitrogen (Measurement) does not exceed 1 2 3 volume. 7. The method of claim 1 in which the H2S is dissolved in Hind sulfur and then contacted with SOz. 8. The method according to item 7 of the patent application, wherein a gas having an H2 5 content of at least 0.5% by volume is in contact with liquid sulfur 'so that a portion of BH2 S is dissolved in sulfur, and then a gas stream containing Hz S is supplied to Claus Factory, so that a part of H2S is thermally converted into SOz, and then in one or more steps, sulfur is formed in the catalyst Claus factory, and the gas mixture is directly converted after the sulfur is separated, or selected as needed This step is followed by conversion in liquid sulfur containing dissolved H2S. 9. The method according to item 1 of the scope of patent application, wherein the tail gas of the Claus step of the Claus plant catalyst with a Η 2 S content of at least 0.25% by volume is in contact with the fluid sulfur, so that at least a part of the Hz S is dissolved In liquid sulfur, H2 S-containing liquid sulfur is then contacted with S02-containing gas, which is carried out in the presence of a catalyst system based on a K-catalyzed heterogeneous catalyst, or as a Claus reaction When used as an accelerator, there are basic nitrogen compounds in the liquid sulfur. (Please read the precautions on the back first before filling in this page) 1 0 The method according to item 1 of the patent application, wherein the number of accelerators 2 (based on the weight of the liquid sulfur) is between 1 and 1000 ppm, which is 3-2 Α8 Β8 C8 D8 The range is preferably between 1 and 50 PD m. 1 1 · The method according to item 1 of the scope of patent application, wherein the reaction is performed in a fixed bed of catalyst particles or other bodies provided with a catalyst, wherein these particles or bodies are injected with liquid sulfur. Please read and read the back of the book first ~ Note the matter Re / Binding Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper is in accordance with Chinese National Standard (CNS) A4 (210X297 mm)