Method for removal of alkyne by front-end deethanization front-end hydrogenation
A technology of pre-hydrogenation and pre-removal, applied in chemical instruments and methods, purification/separation of hydrocarbons and hydrocarbons, etc., can solve the problems of harsh conditions, high reaction temperature, low acetylene conversion rate, etc., and achieve moderate reaction activity. , improved resistance, good ethylene selectivity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0083] Weigh a clover-shaped alumina carrier of Φ4.5×4.5 mm. Take an appropriate amount of ferric nitrate, dissolve it in 60ml of deionized water by heating, adjust the pH value to 2.5, impregnate the equal volume on the surface of the carrier at the temperature of the impregnating solution at 50°C, flip the carrier quickly and impregnate for 6 minutes, let it rest for 30 minutes until the adsorption equilibrium, and age at 60°C for 30 minutes, then Follow the program in the oven: Dry the catalyst, and then use the temperature programming method to activate the catalyst. The activation procedure: Weigh an appropriate amount of silver nitrate and impregnate it according to the above preparation steps.
[0084] Before the catalyst is used, it is reduced in a reduction furnace with 40% hydrogen + 60% nitrogen, the reduction temperature is 375° C., the pressure is 0.5 MPa, and the reduction time is 4 hours. Attached figure 1 In the hydrogenation process shown, the catalyst ...
Embodiment 2
[0091] At 50°C, a certain amount of NaAlO 2 solution and ZrCl 4 The solution was stirred and mixed, then neutralized with nitric acid solution, stirred for 10 hours, and uniform Al-Zr particles were formed by co-precipitation. The resultant was filtered and the Na in it was washed with deionized water + and Cl - Ions, and then add an appropriate amount of polyvinyl alcohol with a mass concentration of 15% as a pore-forming agent, and knead it into shape. Dry at 130°C for 2h, and calcined at 650°C for 4h to obtain a Zr-Al composite support. The mass ratio of alumina to zirconia in the carrier is 4:1.
[0092] The catalyst was prepared with alumina-zirconia composite carrier. Take an appropriate amount of ferric chloride and silver chloride, heat and dissolve in deionized water, adjust the pH value to 2.0, and impregnate the excess on the carrier at a temperature of 80°C, shake the beaker for 10 minutes, and filter off the excess impregnating liquid. Aging in a water bath ...
Embodiment 3
[0099] The spherical alumina of Φ1.5 mm was weighed to prepare the catalyst. Dissolve an appropriate amount of ferric nitrate in deionized water, adjust the pH value to 3.0, soak the solution at a temperature of 40°C, spray the watering can onto the carrier, load it for 10 minutes to make the active components evenly loaded, and then follow the procedure in the oven: Dry the catalyst, and use the temperature programming method to activate the catalyst. The activation procedure: Obtain a catalyst dip.
[0100] Using the same method as the first step, take an appropriate amount of silver nitrate, dissolve it, spray it on the surface of the catalyst, dry it, and roast it to obtain the final catalyst. Drying procedure: Roasting procedure: The physical properties of the carrier and catalyst, and the content of each component of the catalyst are shown in Table 3.
[0101] Before the catalyst is used, it is reduced with 20% hydrogen in a reduction furnace, the reduction...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More