The treatment method of the gas phase super -stable molecular sieve gas and the preparation method of the obtained mixture and its application and catalytic cracking catalyst
A gas-phase ultra-stable, catalytic cracking technology, applied in molecular sieve catalysts, physical/chemical process catalysts, separation methods, etc., can solve the problems of ineffective utilization of exhaust gas and waste of resources, achieve low wear index, reduce emissions, optimize The effect of cracking performance
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[0039] According to a preferred embodiment of the present invention, the method further includes: contacting the second tail gas with water in the third-stage absorption kettle 3 for third absorption to obtain a third absorption liquid and discharging the tail gas.
[0040] According to a specific embodiment of the present invention, the gas-phase ultra-stable molecular sieve tail gas is contacted with water in the first-stage absorption kettle 1, and the dust and silicon tetrachloride gas in the gas-phase ultra-stable molecular sieve tail gas are first absorbed, and the gas-phase ultra-stable molecular sieve tail gas is first absorbed. The ultra-stable molecular sieve tail gas is cooled, and the first tail gas is obtained at the top of the first-stage absorption kettle 1. The first tail gas enters from the bottom of the second-stage absorption kettle 2 through the first induced draft fan 7, contacts with water in the second-stage absorption kettle 2, and carries out the second...
Embodiment 1
[0074] like figure 1 Shown, silicon tetrachloride and Y-type molecular sieve are carried out the gas-phase ultra-stable molecular sieve tail gas Q1 (its composition is shown in Table 1) that the gas-phase ultra-stable reaction obtains and is passed into the first-stage absorption kettle 1 from the bottom, and is cooled and cooled in contact with water. First absorption, relative to each 1m 3 Gas phase ultra-stable molecular sieve tail gas Q1, the amount of water is 25L. The top of the first-stage absorption kettle 1 obtains the first tail gas, which is introduced from the lower part of the second-stage absorption kettle 2 through the first induced draft fan 7, and the second absorption is carried out. 3For the first tail gas, the amount of water used is 15L. The second tail gas is obtained from the top of the second-stage absorption kettle 2, and is introduced from the lower part of the third-stage absorption kettle 3 through the second induced draft fan 8, and the third abs...
Embodiment 2
[0079] The gas-phase ultrastable molecular sieve tail gas Q2 (its composition is shown in Table 1) is treated according to the method of Example 1, wherein in the first-stage absorption kettle 1, relative to every 1 m 3 The gas phase ultra-stable molecular sieve tail gas, the amount of water is 32L; 3 The first tail gas, the amount of water is 18L; in the third-stage absorption kettle 3, relative to each 3 The amount of water used in the second exhaust gas is 8L. The top of the third-stage absorption kettle 3 obtains the exhaust gas P2, which contains HCl 4.8 mg / m 3 , dust 28mg / m 3 , to meet the requirements of DB37 / 2375-2013 Shandong Province Industrial Furnace Air Pollutant Emission Standard. 99% of the HCl in the gas-phase ultrastable molecular sieve tail gas Q2 is recovered.
[0080] In the hydrochloric acid storage tank 4, a liquid mixture M2 containing chlorosilicon and aluminum elements is obtained. The content of each element in the liquid mixture M2 containing ch...
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