Novel high-carbon mercaptan synthesis reaction tower

Abstract

The utility model relates to the technical field of high-carbon mercaptan synthesis process, and discloses a novel high-carbon mercaptan synthesis reaction tower, which comprises a fixed bed reactor, a fixed bed reactor, a fixed bed reactor and a fixed bed reactor, the fixed bed reactor comprises a sprayer, a first-stage catalyst, a first liquid distributor, a second-stage catalyst and a first-stage gas-liquid separator which are sequentially connected in series, the first-stage gas-liquid separator is connected with a first-stage liquid level meter, and the first-stage catalyst and the second-stage catalyst are respectively connected with thermocouples; the reaction tower is used for high-carbon mercaptan synthesis reaction, and the reaction tower comprises a feeding buffer, a second liquid distributor, a packed tower, a second-stage gas-liquid separator and a second-stage liquid level meter which are sequentially connected in series. According to the utility model, by finely regulating and controlling the temperature, moderately changing the pressure or optimizing the using amount of the catalyst and other process conditions, the original components with lower conversion rate can be effectively improved, and a more ideal and balanced conversion effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-carbon mercaptan synthesis technology, in particular to a novel high-carbon mercaptan synthesis reaction tower. Background Art

[0002] Higher-carbon mercaptans are a class of organic compounds with significant applications, and their technical background spans multiple fields. In the chemical industry, with the continuous exploration and development of organic synthesis technologies, the synthesis methods for higher-carbon mercaptans have gradually expanded and improved. Early synthetic methods often suffered from low yields, harsh reaction conditions, and poor selectivity. With the in-depth study of chemical theory and advancements in experimental techniques, new synthetic routes have been continuously developed. For example, the synthesis efficiency and purity of higher-carbon mercaptans have been improved through specific catalytic reactions, the use of efficient reagents, and optimized reaction conditions. In the field of materials science, higher-carbon mercaptans, due to their unique chemical properties, play an important role in the modification of polymer materials. For example, in the rubber industry, higher-carbon mercaptans are used to improve the vulcanization properties of rubber and enhance the strength, wear resistance, and aging resistance of rubber products. In the petrochemical industry, higher-carbon mercaptans are also important additives, used to improve the properties of oil products, such as their antioxidant and corrosion resistance.

[0003] During the actual synthesis process, various reaction conditions, such as temperature, pressure, reactant ratio, solvent selection, and reaction duration, must be strictly controlled to effectively improve yield and ensure purity. Furthermore, post-reaction separation and purification are also crucial. Generally, distillation, extraction, and crystallization are used to obtain pure high-carbon mercaptan products.

[0004] Higher-carbon mercaptans are synthetic products produced by reacting olefin feedstocks with hydrogen sulfide gas over a catalyst. Because olefin feedstocks contain a variety of carbon compositions, and the same carbon composition can be composed of multiple isomers, experimental results show that under identical process conditions such as temperature, pressure, and catalyst, the catalytic reaction efficiency of carbon-carbon double bonds, carbon-carbon single bonds, and carbon-hydrogen bonds in the olefin feedstock with hydrogen sulfide varies, leading to impurities in the synthetic product and affecting its quality. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a novel high-carbon mercaptan synthesis reaction tower, which aims to improve the problem of large differences in component conversion rates of carbon distribution in high-carbon mercaptan raw materials in the prior art.

[0006] To achieve the above-mentioned object, the utility model adopts the following technical solution: a novel high-carbon mercaptan synthesis reaction tower, comprising: a fixed-bed reactor, the fixed-bed reactor being used to improve the conversion rate of the supplied raw material components, the fixed-bed reactor comprising a sprayer, a first-stage catalyst, a first liquid distributor, a second-stage catalyst, and a first-stage gas-liquid separator connected in series, the first-stage gas-liquid separator being connected to a first-stage liquid level gauge, and the first-stage catalyst and the second-stage catalyst being respectively connected to thermocouples;

[0007] A reaction tower is provided, which is used for the synthesis reaction of high-carbon mercaptans. The reaction tower comprises a feed buffer, a second liquid distributor, a packing tower, a secondary gas-liquid separator and a secondary liquid level meter connected in series. The discharge port of the secondary gas-liquid separator is connected to the input end of a product circulation pump, the output end of the circulation pump is connected to the feed buffer via a reflux pipe, and the feed buffer and the primary gas-liquid separator are connected via a pump-liquid pipe.

[0008] As a further description of the above technical solution:

[0009] A liquid inlet pipe is fixedly connected to the top of the outer side of the fixed bed reactor, and the liquid inlet pipe is used to add raw materials of olefin polymerization products. An air inlet pipe is fixedly connected to the middle and lower part of the outer side of the fixed bed reactor, and the air inlet pipe is used to add hydrogen sulfide gas raw materials.

[0010] As a further description of the above technical solution:

[0011] The fixed bed reactor is a hot wall fixed bed reactor, and the reaction temperature is ≤65°C.

[0012] As a further description of the above technical solution:

[0013] The reaction tower is a tower-type synthesis reactor, and the second-stage reaction temperature is ≤115°C.

[0014] As a further description of the above technical solution:

[0015] A hydrogen sulfide output pipe is provided on one side of the secondary gas-liquid separator, and a synthetic product output pipe is provided on the reflux pipe.

[0016] The utility model has the following beneficial effects:

[0017] In the utility model, the interior of the fixed bed reactor is heated by an inner wall heater in the reactor, and the reaction temperature in the reactor is regulated by a thermocouple device so that it fluctuates within an appropriate range to achieve precise control of the reaction process. At the same time, the liquid distributor in the reaction tower evenly distributes the raw materials, increases the contact area between the raw materials and the catalyst, and fully utilizes the liquid distributor in the reaction tower to evenly distribute the raw materials to exert the effectiveness of the catalyst. By finely controlling the temperature, appropriately changing the pressure, or optimizing the amount of catalyst used and other process conditions, the components with originally low conversion rates can be effectively improved to achieve a more ideal and balanced conversion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention provides a schematic diagram of the process flow of a novel high-carbon mercaptan synthesis reaction tower.

[0019] Legend:

[0020] 1. Sprinkler; 2. First-stage catalyst; 3. Liquid distributor No. 1; 4. Second-stage catalyst; 5. Thermocouple; 6. First-stage gas-liquid separator; 7. First-stage liquid level gauge; 8. Feed buffer; 9. Second-stage liquid distributor; 10. Packing tower; 11. Second-stage gas-liquid separator; 12. Second-stage liquid level gauge; 13. Product circulation pump; 14. Reflux pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Reference Figure 1The present invention provides an embodiment of a novel high-carbon mercaptan synthesis reaction tower, comprising a fixed-bed reactor, which is used to improve the conversion rate of the supplied raw material components. The fixed-bed reactor comprises a sprayer 1, a first-stage catalyst 2, a first liquid distributor 3, a second-stage catalyst 4, and a first-stage gas-liquid separator 6 connected in series. The first-stage gas-liquid separator 6 is connected to a first-stage liquid level gauge 7. The first-stage catalyst 2 and the second-stage catalyst 4 are respectively connected to a thermocouple 5. Workers add olefin polymerization products and hydrogen sulfide into the reactor through the feed port and air inlet on the fixed-bed reactor. Gas, when the olefin polymerization product is sprayed in the fixed bed reactor through the spray port on the sprayer 1, the hydrogen sulfide gas transported through the air inlet is catalytically synthesized in the first-stage catalyst 2 to produce high-carbon olefin raw materials. The unreacted raw materials after the primary reaction are evenly dispersed through the fine water holes evenly opened on the No. 1 liquid distributor 3. The water holes are used to evenly distribute the olefin raw materials on the second-stage catalyst 4, thereby increasing the contact area between the raw materials and the catalyst, improving the reaction efficiency, and conducting a secondary reaction. Subsequently, the high-carbon olefin raw materials after the reaction are gathered in the liquid storage tank at the bottom of the fixed bed reactor.

[0023] Reference Figure 1 , reaction tower, the reaction tower is used for the synthesis reaction of high-carbon mercaptans, the reaction tower includes a feed buffer 8, a second liquid distributor 9, a packed tower 10, a secondary gas-liquid separator 11 and a secondary liquid level meter 12 connected in series in sequence, the discharge port of the secondary gas-liquid separator 11 is connected to the input end of the product circulation pump 13, the output end of the circulation pump 13 is connected to the feed buffer 8 through a reflux pipe, the feed buffer 8 and the liquid storage tank are connected by a pump liquid pipe, and the high-carbon olefin raw material is pumped into the tower synthesis reactor by a pump machine. In order to prevent impact during raw material pumping, the feed buffer 8 is used to slow down the impact of raw material feeding. Subsequently, the No. 2 liquid distributor 9 is used to evenly distribute the high-carbon olefin raw material in the packed tower 10, and the solid acid catalyst in the packed tower 10 converts the high-carbon olefin raw material into a high-carbon mercaptan product, and the hydrogen sulfide gas in the product is separated by the secondary gas-liquid separator 11, and is pumped to the fixed bed reactor for secondary utilization by a circulating compressor.

[0024] Reference Figure 1The top of the outer side of the fixed bed reactor is fixedly connected with a liquid inlet pipe, and the middle and lower part of the outer side of the fixed bed reactor is fixedly connected with an air inlet pipe. The fixed bed reactor is a hot wall fixed bed reactor, and the reaction temperature is ≤65°C, which helps to ensure that a specific reaction is carried out at a relatively low temperature, thereby achieving a stable reaction process and product generation. The reaction tower is a tower synthesis reactor, and the second-stage reaction temperature is ≤115°C. Such a temperature setting can meet the needs of reactions at different stages, promote the progress of the reaction and ensure the quality of the product. By finely controlling the temperature, moderately changing the pressure or optimizing the amount of catalyst used and other process conditions, the components with originally low conversion rates can be effectively improved to achieve a more ideal and balanced conversion effect. A hydrogen sulfide output pipe is provided on one side of the secondary gas-liquid separator 11. Workers add olefin polymerization products and hydrogen sulfide gas raw materials into the fixed bed reactor through the liquid inlet pipe and the gas inlet pipe on the fixed bed reactor. A synthetic product output pipe is provided on the reflux pipe 14. The olefin polymerization products are a series of isomers. The synthetic products enter the reaction tower through the top of the tower and realize gas-liquid separation at the bottom of the tower. The gas component is hydrogen sulfide. The gas component goes to the circulation compressor. The liquid component at the bottom of the tower is refluxed to the top of the tower through the reaction circulation pump, and part of it is output to the reaction system. The packed tower 10 is filled with a catalyst containing solid acid.

[0025] Working principle: Workers add olefin polymerization products and hydrogen sulfide gas into the reactor through the liquid inlet pipe and air inlet on the hot wall fixed bed reactor. When the olefin polymerization products are sprayed in the fixed bed reactor through the spray port on the sprayer 1, the hydrogen sulfide gas transported through the air inlet is catalytically synthesized in the first-stage catalyst 2 to produce high-carbon olefin raw materials. The unreacted raw materials after the first-stage reaction are evenly distributed through the fine water holes evenly opened on the No. 1 liquid distributor 3. The water holes are used to evenly distribute the olefin raw materials on the second-stage catalyst 4, thereby increasing the contact area between the raw materials and the catalyst, improving the reaction efficiency, and carrying out the secondary reaction. After the reaction, the high-carbon olefin raw materials are gathered in the liquid storage tank at the bottom of the fixed-bed reactor. Then, the high-carbon olefin raw materials are pumped into the tower synthesis reactor by a pump. In order to prevent impact during raw material pumping, the feed buffer 8 is used to slow down the impact of raw material feeding. Subsequently, the high-carbon olefin raw materials are evenly distributed in the packed tower 10 by using the No. 2 liquid distributor 9. The solid acid catalyst in the packed tower 10 converts the high-carbon olefin raw materials into high-carbon mercaptan products, which are transported to the synthesis reactor, and the hydrogen sulfide gas in the product is separated by the secondary gas-liquid separator 11. It is pumped to the hot-wall fixed-bed reactor for secondary utilization by using a circulating compressor.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A novel high-carbon mercaptan synthesis reaction tower, characterized in that: include: A fixed bed reactor is used to improve the conversion rate of the supplied raw material components. The fixed bed reactor comprises a sprayer (1), a first-stage catalyst (2), a first liquid distributor (3), a second-stage catalyst (4), and a first-stage gas-liquid separator (6) connected in series. The first-stage gas-liquid separator (6) is connected to a first-stage liquid level gauge (7). The first-stage catalyst (2) and the second-stage catalyst (4) are respectively connected to thermocouples (5). A reaction tower is provided, wherein the reaction tower is used for a high-carbon mercaptan synthesis reaction, and the reaction tower comprises a feed buffer (8), a second liquid distributor (9), a packing tower (10), a secondary gas-liquid separator (11) and a secondary liquid level meter (12) connected in series in sequence, wherein the discharge port of the secondary gas-liquid separator (11) is connected to the input end of a product circulation pump (13), the output end of the circulation pump (13) is connected to the feed buffer (8) via a reflux pipe, and the feed buffer (8) and the primary gas-liquid separator (6) are connected via a pump-liquid pipe.

2. A novel high-carbon mercaptan synthesis reaction tower according to claim 1, characterized in that: A liquid inlet pipe is fixedly connected to the top of the outer side of the fixed bed reactor, and the liquid inlet pipe is used to add raw materials of olefin polymerization products. An air inlet pipe is fixedly connected to the middle and lower part of the outer side of the fixed bed reactor, and the air inlet pipe is used to add hydrogen sulfide gas raw materials.

3. A novel high-carbon mercaptan synthesis reaction tower according to claim 1, characterized in that: The fixed bed reactor is a hot wall fixed bed reactor, and the reaction temperature is ≤65°C.

4. A novel high-carbon mercaptan synthesis reaction tower according to claim 1, characterized in that: The reaction tower is a tower-type synthesis reactor, and the second-stage reaction temperature is ≤115°C.

5. A novel high-carbon mercaptan synthesis reaction tower according to claim 1, characterized in that: A hydrogen sulfide output pipe is provided on one side of the secondary gas-liquid separator (11), and a synthetic product output pipe is provided on the reflux pipe.

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