Acetylene carbon black preparation method
By adding benzene anthracene mixed steam during the preparation process of acetylene carbon black and controlling the temperature, the problem of unstable quality of acetylene carbon black products is solved, and high-quality acetylene carbon black is achieved at low temperatures, reducing the preparation difficulty and cost.
Patent Information
- Application Number
- CN202510686376.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2025-08-29
AI Technical Summary
In the prior art, temperature fluctuations in the acetylene carbon black reactor lead to unstable product quality.
Acetylene gas is generated by adding calcium carbide and water to the acetylene reactor in a certain proportion, and mixed with benzene anthracene steam and mixed with benzene anthracene to the carbon black reactor under a preset pressure, and adjusting the temperature to 1200 degrees Celsius to 1500 degrees Celsius, so that the acetylene gas and benzene anthracene mixed steam can be reacted to form acetylene carbon black.
Prepare acetylene carbon black with uniform particles and stable properties at lower temperatures, reducing the difficulty and cost of preparation, improving convenience and stability, and meeting the needs of different usage environments.
Smart Images
Figure CN120554871A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of energy technology, and in particular relates to a method for preparing acetylene black. Background Art
[0002] Acetylene black is produced by continuous pyrolysis of acetylene with a purity exceeding 99%, obtained through the decomposition and purification of by-product gases from the calcium carbide process or naphtha (crude gasoline) pyrolysis. Compared to furnace-processed carbon black, it exhibits better conductivity and liquid absorption. Furthermore, due to its reduced presence of impurities such as heavy metals, it minimizes losses due to self-discharge and offers improved storage performance.
[0003] In related technologies, the internal temperature of the reactor is raised to above 800°C (the starting temperature for acetylene decomposition), and then acetylene is introduced to initiate thermal decomposition. Because this reaction is exothermic, it can proceed automatically. To ensure stable product quality, the reaction temperature should be maintained at around 1800°C. The furnace temperature can be controlled using a water-cooled jacket on the reactor's outer tube.
[0004] However, due to the influence of the actual environment, the temperature in the reactor may fluctuate and even fall below 1800°C, resulting in unstable product quality of the generated acetylene black. Summary of the Invention
[0005] The present application provides a method for preparing acetylene black, which solves the problem in the prior art that the temperature in the reactor may fluctuate and fall below 1800°C, resulting in unstable product quality of the generated acetylene black.
[0006] To achieve the above objectives, this application adopts the following technical solutions:
[0007] In a first aspect, an embodiment of the present application provides a method for preparing acetylene black, the method comprising:
[0008] adding calcium carbide and water in a first ratio into an acetylene reaction furnace to generate acetylene gas;
[0009] Adding the acetylene gas and the benzene anthracene mixed steam into the carbon black reactor at a preset pressure according to a second ratio;
[0010] The temperature in the carbon black reaction furnace is adjusted to between 1200 degrees Celsius and 1500 degrees Celsius, so that the acetylene gas and the benzene anthracene mixed vapor react to generate acetylene carbon black.
[0011] Optionally, the first ratio is a weight ratio range between the calcium carbide and the water, and the weight ratio range between the calcium carbide and the water is 1:15 to 1:30.
[0012] Optionally, the second ratio is a volume ratio range between the acetylene gas and the benzene-anthracene mixed vapor, and the volume ratio range between the acetylene gas and the benzene-anthracene mixed vapor is 2:1 to 5:1.
[0013] Optionally, the preset pressure has a pressure range of 20 kPa to 60 kPa.
[0014] Optionally, before adding the acetylene gas and the benzene anthracene mixed vapor in a second ratio at a preset pressure into the carbon black reaction furnace, the method further comprises:
[0015] Benzene and anthracene are added into the heater in a third ratio, and the benzene and anthracene are heated by the heater at a second temperature for a second preset time to obtain the benzene-anthracene mixed vapor.
[0016] Optionally, the third ratio is a weight ratio range between the benzene and the anthracene, and the weight ratio range between the benzene and the anthracene is 1:0.01 to 1:0.1.
[0017] Optionally, the second temperature ranges from 220 degrees Celsius to 230 degrees Celsius, and the second preset time ranges from 15 minutes to 20 minutes.
[0018] Optionally, during the process of generating the acetylene gas, the temperature of the acetylene reaction furnace ranges from 80 degrees Celsius to 90 degrees Celsius.
[0019] Optionally, during the process of adding the acetylene gas into the carbon black reaction furnace, the feed temperature of the acetylene gas ranges from 13 degrees Celsius to 20 degrees Celsius.
[0020] Optionally, after generating acetylene black, the method further comprises:
[0021] The acetylene carbon black is analyzed by at least one of physical and chemical property testing, scanning electron microscopy testing, and four-probe resistance testing to obtain a property test report of the acetylene carbon black.
[0022] An embodiment of the present application provides a method for preparing acetylene black, which comprises adding calcium carbide and water to an acetylene reactor in a first ratio to generate acetylene gas, and then mixing the acetylene gas with a benzene-anthracene mixed vapor in a second ratio at a preset pressure and adding the mixture to the carbon black reactor, and then adjusting the temperature in the carbon black reactor to between 1200 degrees Celsius and 1500 degrees Celsius so that the acetylene gas and the benzene-anthracene mixed vapor react to generate acetylene black. By introducing the benzene-anthracene mixed vapor during the preparation of acetylene black, acetylene black with uniform particles and stable properties is successfully prepared at a low temperature of 1200 degrees Celsius to 1500 degrees Celsius. Compared with the prior art, acetylene black with stable product quality can be prepared at a lower temperature, thereby reducing the conditions and difficulty of preparing acetylene black, and further improving the convenience and stability of preparing acetylene black. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 A schematic flow chart of a method for preparing acetylene black provided in an embodiment of the present application;
[0024] Figure 2 Scanning electron microscope images of acetylene black and conventional carbon black provided in the examples of this application. DETAILED DESCRIPTION
[0025] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known chemical reaction processes and chemical reaction conditions are omitted to prevent unnecessary details from obstructing the description of the present application.
[0026] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a," "said," "above," and "the" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise.
[0027] Figure 1 A schematic flow chart of a method for preparing acetylene black provided in the embodiment of the present application is provided as an example and not as a limitation. Figure 1 , the method comprising:
[0028] Step 101: Add calcium carbide and water into an acetylene reaction furnace in a first ratio to generate acetylene gas.
[0029] The first ratio may be a weight ratio range of calcium carbide to water, and the weight ratio range of calcium carbide to water may be 1:15 to 1:30. Furthermore, during the generation of acetylene gas, the temperature of the acetylene reactor ranges from 80 degrees Celsius to 90 degrees Celsius.
[0030] In the process of preparing acetylene carbon black, acetylene can be prepared first, so that acetylene can be added during the process of generating carbon black, and then acetylene carbon black with stable product quality and excellent conductive properties can be generated based on a relatively low temperature.
[0031] Specifically, calcium carbide and water can be mixed according to a first ratio based on their weight, and then added to an acetylene reactor. The acetylene reactor is heated so that the calcium carbide and water react in the acetylene reactor to generate acetylene gas.
[0032] Step 102: Add benzene and anthracene into the heater in a third ratio, heat the benzene and anthracene by the heater, and heat the benzene and anthracene at a second temperature for a second preset time to obtain a benzene-anthracene mixed vapor.
[0033] The third ratio is a weight ratio range between benzene and anthracene, and the weight ratio range between benzene and anthracene is 1:0.01 to 1:0.1. The second temperature range is 220 degrees Celsius to 230 degrees Celsius, and the second preset time range is 15 minutes to 20 minutes.
[0034] Similar to step 101, benzene-anthracene mixed vapor for preparing acetylene black can also be prepared in advance, so that the benzene-anthracene mixed vapor can be added during the process of generating acetylene black, thereby generating acetylene black of the same quality within a lower temperature range.
[0035] Specifically, benzene and anthracene can be first mixed according to a third ratio based on their weight, and then the mixed benzene and anthracene can be added to the heater. The heater heats the benzene and anthracene based on the second temperature to vaporize the benzene and anthracene. After the second preset time, a benzene-anthracene mixed vapor can be obtained.
[0036] Step 103: Add acetylene gas and benzene anthracene mixed steam into the carbon black reactor at a preset pressure in a second ratio.
[0037] The second ratio is a volume ratio range between acetylene gas and benzene anthracene mixed vapor, and the volume ratio range between acetylene gas and benzene anthracene mixed vapor is 2:1 to 5:1. Moreover, the preset pressure range is 20 kPa to 60 kPa.
[0038] After obtaining the acetylene gas and the benzene anthracene mixed vapor, the acetylene gas and the benzene anthracene mixed vapor can be added to the carbon black reactor at the preset pressure at the same time, so that in the subsequent steps, the acetylene gas and the benzene anthracene mixed vapor can react in the carbon black reactor to generate acetylene carbon black.
[0039] It should be noted that, in the process of adding acetylene gas to the carbon black reactor, the feed temperature of the acetylene gas can be maintained in the range of 13 degrees Celsius to 20 degrees Celsius to ensure the safety and stability of the acetylene gas.
[0040] Step 104: Adjust the temperature in the carbon black reaction furnace to between 1200 degrees Celsius and 1500 degrees Celsius, so that the acetylene gas and the benzene anthracene mixed vapor react to generate acetylene carbon black.
[0041] Corresponding to step 103, after acetylene gas and benzene anthracene mixed steam are added to the carbon black reactor, the carbon black reactor can be heated so that the temperature inside the carbon black reactor is maintained between 1200 degrees Celsius and 1500 degrees Celsius, thereby generating high-quality acetylene carbon black at a lower temperature compared to a high temperature of 1800 degrees Celsius.
[0042] It should be noted that in actual applications, acetylene black can be produced through the process from step 101 to step 104 to complete the preparation of acetylene black. In the embodiment of the present application, step 105 can also be continued to detect and analyze the produced acetylene black to determine the quality of the acetylene black.
[0043] Step 105: Analyze the acetylene black by at least one of physical and chemical property testing, scanning electron microscopy testing, and four-probe resistance testing to obtain a property test report of the acetylene black.
[0044] After the acetylene carbon black is generated, it can be analyzed and tested in terms of oil absorption value, nitrogen adsorption value, iodine absorption value, ash content and carbon black particle size by at least one of the following analytical methods: physical and chemical property testing and analysis, scanning electron microscopy (SEM) analysis and four-probe resistance testing and analysis. A property test report of the acetylene carbon black is obtained to determine the product quality of the acetylene carbon black generated by the above method.
[0045] Accordingly, referring to the process of step 101 to step 104, three types of acetylene carbon black (HH-1, HH-2 and HH-3) can be prepared using different parameters, and the three types of acetylene carbon black are compared with two types of acetylene carbon black in the prior art (conventional carbon black and a certain brand of conductive carbon black). The comparison results are shown in Table 1.
[0046] Table 1
[0047]
[0048] Data analysis shows that the acetylene carbon black obtained in the examples of the present application has an ash purity of less than 0.1, which is much lower than that of a certain brand of conductive carbon black. The particle size is also smaller than that of a certain brand of conductive carbon black and conventional carbon black without the addition of benzene anthracene vapor. In practical applications, it can be more closely combined with the active material. Most importantly, the electrical conductivity of the acetylene carbon black of the present application is on the same order of magnitude as that of a certain brand of battery-grade conductive carbon black. It has ultra-high conductivity and can be used as a conductive additive for energy storage batteries.
[0049] It should be noted that in the process of preparing three types of acetylene black using different parameters, calcium carbide and water can be fed into the acetylene reactor in a ratio of 1:20 to 1:25, and then acetylene gas is generated. The generated acetylene gas and benzene anthracene mixed vapor (benzene: anthracene = 1:0.05) are sprayed into the reactor through a nozzle at a pressure of 60 kPa in a ratio of 1:3 to 1:5, and then acetylene black (HH-1, HH-2 and HH-3) is generated at a temperature of 1500 degrees Celsius.
[0050] Furthermore, conventional carbon black can be produced without adding benzene-anthracene mixed vapor. Specifically, calcium carbide and water can be added to an acetylene generation reactor at a weight ratio of 1:25, reacted at 85°C for 40 minutes to produce acetylene gas. The acetylene gas (feed temperature: 15°C) is then sprayed into a cracking furnace at a pressure of 40 kPa, and the cracking furnace temperature is maintained at 1200°C to produce acetylene black and tail gas. After compression, gas-solid separation is performed to obtain acetylene black.
[0051] Further, see Figure 2 , Figure 2 Scanning electron microscope images of an acetylene carbon black and conventional carbon black provided in an embodiment of the present application, area a in the figure corresponds to acetylene carbon black HH-1, area b in the figure corresponds to acetylene carbon black HH-2, area c in the figure corresponds to acetylene carbon black HH-3, and area d in the figure corresponds to conventional carbon black prepared without adding benzene anthracene mixed vapor.
[0052] from Figure 2 It can be clearly observed that the quality of acetylene black products produced directly from acetylene is extremely unstable, while the products produced using the process of the embodiment of the present application can obtain acetylene black with uniform particle size and stable product quality at 1200-1500°C.
[0053] In summary, the embodiment of the present application proposes a method for preparing acetylene black, which is carried out by adding calcium carbide and water to an acetylene reactor in a first ratio to generate acetylene gas, and mixing the acetylene gas with a benzene anthracene mixed vapor in a second ratio at a preset pressure and adding the mixture to the carbon black reactor, and then adjusting the temperature in the carbon black reactor to between 1200 degrees Celsius and 1500 degrees Celsius, so that the acetylene gas and the benzene anthracene mixed vapor react to generate acetylene black. By introducing the benzene anthracene mixed vapor during the preparation of acetylene black, acetylene black with uniform particles and stable properties is successfully prepared under a low temperature environment of 1200 degrees Celsius to 1500 degrees Celsius. Compared with the prior art, acetylene black with stable product quality can be prepared under a lower temperature environment, thereby reducing the conditions and difficulty of preparing acetylene black, and further improving the convenience and stability of preparing acetylene black.
[0054] Moreover, through process control, the particle size and structure can be controlled in the temperature range of 1200 degrees Celsius to 1500 degrees Celsius to meet different usage environments.
[0055] In addition, acetylene black with stable product quality is produced at 1200 to 1500 degrees Celsius, and the production temperature is low, which can reduce costs and carbon emissions.
[0056] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.
[0057] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
[0058] In the embodiments provided in this application, it should be understood that the disclosed devices / equipment and methods can be implemented in other ways. For example, the device / equipment embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
[0059] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.
[0060] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
[0061] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.
[0062] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.
[0063] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.
[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A method for preparing acetylene black, characterized in that: The method comprises: adding calcium carbide and water in a first ratio into an acetylene reaction furnace to generate acetylene gas; Adding the acetylene gas and the benzene anthracene mixed steam into the carbon black reactor at a preset pressure according to a second ratio; The temperature in the carbon black reaction furnace is adjusted to between 1200 degrees Celsius and 1500 degrees Celsius, so that the acetylene gas and the benzene anthracene mixed vapor react to generate acetylene carbon black.
2. The method according to claim 1, characterized in that The first ratio is a weight ratio range between the calcium carbide and the water, and the weight ratio between the calcium carbide and the water ranges from 1:15 to 1:
30.
3. The method according to claim 1, characterized in that The second ratio is a volume ratio range between the acetylene gas and the benzene-anthracene mixed vapor, and the volume ratio range between the acetylene gas and the benzene-anthracene mixed vapor is 2:1 to 5:
1.
4. The method according to claim 1, wherein The preset pressure ranges from 20 kPa to 60 kPa.
5. The method according to claim 1, wherein Before adding the acetylene gas and the benzene anthracene mixed steam in a second ratio at a preset pressure into the carbon black reaction furnace, the method further includes: Benzene and anthracene are added into the heater in a third ratio, and the benzene and anthracene are heated by the heater at a second temperature for a second preset time to obtain the benzene-anthracene mixed vapor.
6. The method according to claim 5, characterized in that The third ratio is a weight ratio range between the benzene and the anthracene, and the weight ratio between the benzene and the anthracene is in a range of 1:0.01 to 1:0.
1.
7. The method according to claim 5, characterized in that The second temperature ranges from 220 degrees Celsius to 230 degrees Celsius, and the second preset time ranges from 15 minutes to 20 minutes.
8. The method according to any one of claims 1 to 7, characterized in that: During the process of generating the acetylene gas, the temperature of the acetylene reaction furnace ranges from 80 degrees Celsius to 90 degrees Celsius.
9. The method according to any one of claims 1 to 7, characterized in that: During the process of adding the acetylene gas into the carbon black reaction furnace, the feed temperature of the acetylene gas ranges from 13 degrees Celsius to 20 degrees Celsius.
10. The method according to any one of claims 1 to 7, characterized in that: After generating acetylene black, the method further comprises: The acetylene carbon black is analyzed by at least one of physical and chemical property testing, scanning electron microscopy testing, and four-probe resistance testing to obtain a property test report of the acetylene carbon black.