Propylene/propane separation method
A separation method and propane technology, applied in the field of chemical materials, can solve the problems of high energy consumption and high operation requirements, and achieve the effects of simplifying separation steps, simple preparation process, and green environmental protection cost.
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Embodiment 1
[0066] Aluminum isopropoxide, concentrated phosphoric acid, silica sol, cyclohexylamine and water 2 o 3 :P 2 o 5 :0.1SiO2 2 :CHA:50H 2 The ratio of O (molar ratio) was prepared into a uniform reaction solution under the condition of a 60°C water bath, and the reaction solution was transferred to a dynamic oven for crystallization at 200°C for 96h. After the crystallization was completed, it was naturally cooled to room temperature, and the crystallized product was filtered and washed to obtain SAPO-17 molecular sieve. The prepared SAPO-17 molecular sieve was calcined at 600°C for 6 hours to completely remove the template agent in the molecular sieve. 4 g of SAPO-17 molecular sieves removed from the template and 200 mL of 1 mmol / L NaCl solution were subjected to ion exchange treatment, repeated 3 times, to obtain sodium ion-type SAPO-17 adsorbent 1#. At 25°C and 100kPa, the static adsorption capacities of propylene and propane of adsorbent 1# were 35.9 and 26.1mL / g respec...
Embodiment 2
[0068] Aluminum isopropoxide, concentrated phosphoric acid, ethyl orthosilicate, cyclohexylamine and water 2 o 3 :P 2 o 5 :0.1SiO2 2 :CHA:50H 2 The ratio of O (molar ratio) was prepared into a uniform reaction solution under the condition of a water bath at 50° C., and the reaction solution was transferred to a dynamic oven for crystallization at 200° C. for 80 h. After the crystallization was completed, it was naturally cooled to room temperature, and the crystallized product was filtered and washed to obtain SAPO-17 molecular sieve. The prepared SAPO-17 molecular sieve was calcined at 600°C for 4 hours to completely remove the template agent in the molecular sieve to obtain proton-type SAPO-17 adsorbent 2#. At 25°C and 100kPa, the static adsorption capacities of propylene and propane of adsorbent 2# were 50.0 and 31.3mL / g respectively, and the static adsorption selectivity was 1.60; The kinetic adsorption capacity of propylene and propane in the permeation experiment w...
Embodiment 3
[0070] Pseudoboehmite, concentrated phosphoric acid, silica sol, diethyldimethylammonium hydroxide and water 2 o 3 :P 2 o 5 :0.2SiO2 2 :DEDMAOH:50H 2 The ratio of O (molar ratio) was prepared in a water bath at 40°C to make a uniform reaction solution, and the reaction solution was transferred to a dynamic oven for crystallization at 200°C for 72 hours. After the crystallization was completed, it was naturally cooled to room temperature, and the crystallized product was filtered and washed to obtain SAPO-57 molecular sieve. The prepared SAPO-57 molecular sieve was calcined at 600° C. for 5 hours to completely remove the template agent in the molecular sieve. Remove the SAPO-57 molecular sieve 4g of templating agent and 0.8mmol / L K 2 CO 3 Solution 200mL is subjected to ion exchange treatment, repeats 4 times, obtains potassium ion type SAPO-57 adsorbent 3#. At 25°C and 100kPa, the static adsorption capacities of propylene and propane of adsorbent 3# were 35.5 and 25.8mL...
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