Technology for preparing 2-ethylanthraquinone
A technology for producing ethylanthraquinone and a production process, which is applied in the field of production process for 2-ethylanthraquinone, can solve problems such as inability to realize large-scale industrial production, difficult sources of raw materials, cumbersome synthesis steps, etc., achieve low cost and increase production efficiency, easy preparation
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Embodiment 1
[0036] Step 1. Preparation of 2-ethylanthracene:
[0037] Mix the raw material MWW structure molecular sieve, transition metal salt solution, tetramethylammonium hydroxide, pentamethyleneimine, and deionized water uniformly to obtain the ratio of the amount of substances as H 2 0 / Si0 2 = 5, R1 / Si0 2 = 0.015, R2 / Si0 2 =0.5, and the mixture was crystallized at 180°C for 5h and recovered. The prepared catalyst was contacted and reacted with anthracene and ethylene at a temperature of 180°C and a pressure of 1MPa to obtain 2-ethyl Anthracene
[0038] Step 2. Preparation of 2-ethylanthraquinone. The Y-type molecular sieve catalyst is treated in glycerol at 150°C for 5 hours, and then mixed with the resulting mixture, inorganic directing agent, and transition metal salt solution at 80°C for 2 hours, and then placed in a closed reactor Treated at 120°C for 20h, take out the product under normal temperature and pressure, dry and roast to obtain mesoporous Y-type molecular sieve with a pore...
Embodiment 2
[0040] Step 1. Preparation of 2-ethylanthracene. A conventional MWW structure catalyst is reacted with anthracene and ethylene at a temperature of 180°C and a pressure of 1MPa to obtain 2-ethylanthracene;
[0041] Step 2. Preparation of 2-ethylanthraquinone. The Y-type molecular sieve catalyst is treated in glycerol at 150°C for 5 hours, and then mixed with the resulting mixture, inorganic directing agent, and transition metal salt solution at 80°C for 2 hours, and then placed in a closed reactor Treated at 120℃ for 20h, take out the product under normal temperature and pressure, dry and calcined to obtain mesoporous Y molecular sieve with pore diameter centered on 5-7nm; the mass mixing ratio of Y molecular sieve and glycerol is 1:5, Y molecular sieve and inorganic The mass mixing ratio of the directing agent is 1:0.5. Under the conditions of a temperature of 180°C and a pressure of 1 MPa, 2-ethylanthracene and hydrogen peroxide are contacted and reacted with the prepared catalys...
Embodiment 3
[0043] Step 1. Preparation of 2-ethylanthracene. The raw material MWW structure molecular sieve, transition metal salt solution, nitrogen-containing organic base Rl, organic amine R2, and deionized water are mixed uniformly to obtain the ratio of the amount of substance to H 2 0 / Si0 2 = 5, R1 / Si0 2 = 0.015, R 2 / Si0 2 =0.5, and the mixture was crystallized at 180°C for 5h and recovered. The prepared catalyst was contacted and reacted with anthracene and ethylene at a temperature of 180°C and a pressure of 1MPa to obtain 2-ethyl Anthracene
[0044] Step 2. Preparation of 2-ethylanthraquinone. At a temperature of 180°C and a pressure of 1MPa, 2-ethylanthracene and hydrogen peroxide are contacted and reacted with a conventional mesoporous Y-type molecular sieve catalyst to obtain 2- Ethyl anthraquinone.
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