A method for promoting the conversion of butane to aromatics

Abstract

Disclosed is a method for preparing arene by promoting conversion of butane. Due to the adoption of the method that accelerants are added in raw materials, conversion rates and reaction rates of the butane are improved. The accelerants comprise any one kind or mix of any several kinds of carbinol, dimethyl ether, ethanol, chloromethane, iodomethane, toluene and xylol. In mixed materials of the butane and the accelerants, the ratio of the number of carbon atoms contained in the butane to the number of carbon atoms contained in the accelerants is 10-500. Molecular sieve catalysts are any one kind and the mix of any several kinds of HZSM-5, HZSM-11, HZSM-22, HY and HBeta.

Description

technical field

[0001] The invention relates to a method for promoting the conversion of butane to produce aromatic hydrocarbons. Background technique

[0002] The raw materials of current chemical production rely heavily on petroleum, while petroleum and coal resources are decreasing day by day; the demand for aromatics as liquid fuels, solvents, and chemical raw materials is increasing day by day. At the same time, the reserves of low-carbon alkanes represented by natural gas are very large on the earth, but due to the relatively stable structure and properties of low-carbon alkanes, there are few breakthroughs in direct conversion. If the conversion of low-carbon alkanes can be improved in some way, in Resources, energy, technology and economy have very important strategic significance.

[0003] For a long time, most low-carbon alkanes have been used as fuels, and butane is a by-product of natural gas processing and petrochemical processes, and the main component of liqu...

Examples

Embodiment 1

[0043] Embodiment 1 metal supported catalyst preparation

[0044] The HZSM-5, HZSM-11, and HZSM-22 (Si / Al=20-100) molecular sieve catalysts used in the experiment were purchased from Nankai University Catalyst Factory.

[0045] Weigh 100.00 g (dry basis) of the molecular sieve carrier, add a certain concentration of metal salt solution, and then add a certain amount of 25-28% ammonia water, and stir until it becomes a paste. Dry at 120°C for 6 hours, then increase the temperature at a rate of 5°C / min to 550°C and bake for 5 hours, cool to room temperature and grind to powder, bake at 350°C for 2 hours, after cooling, go through tableting, grinding, Sieve, and keep catalyst particles of 60 mesh to 80 mesh for future use.

[0046] Table 1 shows the relationship between the number of the obtained catalyst sample and the molecular sieve carrier used, the metal salt solution, the amount of 25-28% ammonia water added, and the mass percentage of the metal supported on the catalyst. ...

Embodiment 2

[0057] Methanol as a promoter mixed with butane on various catalysts for pulse reaction experiments

[0058] Load 32mg of catalyst into a quartz tube with an inner diameter of 3mm, heat to 550°C in the flow of activated gas (nitrogen, hydrogen, methane or a mixture of any of several) and maintain it for 30 minutes in this state, Complete the catalyst activation process. Then the raw material gas of 1ml under normal pressure is passed through catalyzer, and the contact time of raw material gas and catalyzer is 1s, and raw material gas proportioning is: butane / methanol=70 (the carbon number ratio that butane and promotor contain), its concrete The composition is: butane 52.5%, methanol (steam) 3%, helium 44.5%, and the above percentages are mole percentages. The product after reaction enters chromatographic analysis, and its analysis condition is as comparative example 1, and result is as shown in table 2 (aromatic hydrocarbon product comprises benzene, toluene, ethylbenzene, s...

Embodiment 3

[0062] Impulse reaction experiment of various accelerators mixed with butane on CAT-1

[0063] 32 mg of CAT-1 catalyst was loaded into a quartz tube with an inner diameter of 3 mm, heated to 550° C. in an activation gas (nitrogen) flow and kept there for 30 minutes to complete the catalyst activation process. Then the feed gas of 1ml under normal pressure is passed through catalyzer, and the contact time of feed gas and catalyzer is 1s, and feed gas proportioning is: butane / promotor=70 (butane and promotor contain carbon number ratio), above-mentioned The percentages are all mole percentages. The reacted product enters the chromatogram for analysis, and the analysis conditions are as in Comparative Example 1, and the results are shown in Table 3.

[0064] Table 3: Pulse reaction experiment of various accelerators mixed with butane on CAT-1

[0065] Accelerator

[0066] Iodomethane

technical field

[0001] The invention relates to a method for promoting the conversion of butane to produce aromatic hydrocarbons. Background technique

[0002] The raw materials of current chemical production rely heavily on petroleum, while petroleum and coal resources are decreasing day by day; the demand for aromatics as liquid fuels, solvents, and chemical raw materials is increasing day by day. At the same time, the reserves of low-carbon alkanes represented by natural gas are very large on the earth, but due to the relatively stable structure and properties of low-carbon alkanes, there are few breakthroughs in direct conversion. If the conversion of low-carbon alkanes can be improved in some way, in Resources, energy, technology and economy have very important strategic significance.

[0003] For a long time, most low-carbon alkanes have been used as fuels, and butane is a by-product of natural gas processing and petrochemical processes, and the main component of liqu...

Examples

Embodiment 1

[0043] Embodiment 1 metal supported catalyst preparation

[0044] The HZSM-5, HZSM-11, and HZSM-22 (Si / Al=20-100) molecular sieve catalysts used in the experiment were purchased from Nankai University Catalyst Factory.

[0045] Weigh 100.00 g (dry basis) of the molecular sieve carrier, add a certain concentration of metal salt solution, and then add a certain amount of 25-28% ammonia water, and stir until it becomes a paste. Dry at 120°C for 6 hours, then increase the temperature at a rate of 5°C / min to 550°C and bake for 5 hours, cool to room temperature and grind to powder, bake at 350°C for 2 hours, after cooling, go through tableting, grinding, Sieve, and keep catalyst particles of 60 mesh to 80 mesh for future use.

[0046] Table 1 shows the relationship between the number of the obtained catalyst sample and the molecular sieve carrier used, the metal salt solution, the amount of 25-28% ammonia water added, and the mass percentage of the metal supported on the catalyst. ...

Embodiment 2

[0057] Methanol as a promoter mixed with butane on various catalysts for pulse reaction experiments

[0058] Load 32mg of catalyst into a quartz tube with an inner diameter of 3mm, heat to 550°C in the flow of activated gas (nitrogen, hydrogen, methane or a mixture of any of several) and maintain it for 30 minutes in this state, Complete the catalyst activation process. Then the raw material gas of 1ml under normal pressure is passed through catalyzer, and the contact time of raw material gas and catalyzer is 1s, and raw material gas proportioning is: butane / methanol=70 (the carbon number ratio that butane and promotor contain), its concrete The composition is: butane 52.5%, methanol (steam) 3%, helium 44.5%, and the above percentages are mole percentages. The product after reaction enters chromatographic analysis, and its analysis condition is as comparative example 1, and result is as shown in table 2 (aromatic hydrocarbon product comprises benzene, toluene, ethylbenzene, s...

Embodiment 3

[0062] Impulse reaction experiment of various accelerators mixed with butane on CAT-1

[0063] 32 mg of CAT-1 catalyst was loaded into a quartz tube with an inner diameter of 3 mm, heated to 550° C. in an activation gas (nitrogen) flow and kept there for 30 minutes to complete the catalyst activation process. Then the feed gas of 1ml under normal pressure is passed through catalyzer, and the contact time of feed gas and catalyzer is 1s, and feed gas proportioning is: butane / promotor=70 (butane and promotor contain carbon number ratio), above-mentioned The percentages are all mole percentages. The reacted product enters the chromatogram for analysis, and the analysis conditions are as in Comparative Example 1, and the results are shown in Table 3.

[0064] Table 3: Pulse reaction experiment of various accelerators mixed with butane on CAT-1

[0065] Accelerator

[0066] Iodomethane

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