Dearsenicating agent for removing high boiling point arsonium compound in liquid-state petroleum hydrocarbon at low temperature and normal temperature
A petroleum hydrocarbon, high boiling point technology, applied in the direction of refining with metal oxides, etc., can solve the problems of unsatisfactory removal effect and insufficient arsenic capacity of the arsenic remover, and achieve the effect of good removal performance, easy operation and favorable conditions.
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Embodiment 1
[0030] Take silicon dioxide (SiO 2 ) carrier 200 grams, impregnated to a certain concentration of 300 milliliters Fe(NO 3 ) 3 and Pd(NO 3 ) 2 After immersing in the mixed solution overnight, dry it on the electric furnace with a low fire, further dry it at 120 ° C, and then burn it in a high temperature furnace at 400 ° C for 12 hours to prepare the dearsenic compounds numbered 1 to 11 respectively. agent (see Table 1), and store it in a vacuum desiccator for future use.
[0031] Take 50 grams of arsenic removal agents numbered 1 to 11 respectively, fill them in a fixed-bed reactor with an inner diameter of 33mm, activate them in a nitrogen atmosphere at 150-300°C for 2 hours, cool down to below 50°C, and then measure The pump is injected with 500ppb arsenic (as AsPh 3 form) of naphtha (sulfur 300ppm), keep the liquid space velocity at 2.5h -1 After 200 hours of continuous treatment, the arsenic concentration at the outlet was detected, and the test results are shown in ...
Embodiment 2
[0035] Add aluminum nitrate (Al(NO 3 ) 3 9H 2 O) 187.6 grams (0.5mol) and zinc nitrate (Zn(NO 3 ) 2 .6H 2 O) 59.5 grams (0.2mol), copper nitrate (Cu(NO 3 ) 2 .3H 2 O) 40.6 grams and silver nitrate (AgNO 3 ) 2.06g, then add 100mL of deionized water, fully stir to dissolve, keep the temperature at 50~55℃, add dropwise 40wt% Na 2 CO 3 The solution is aged until the pH value of the solution is between 7.5 and 9, and centrifuged after aging for 0.5 hour to obtain a solid material. The solid material was reslurried with deionized water to fully remove soluble inorganic salts, dried at 120°C after molding, and then burned in a high-temperature furnace at 400°C for 12 hours, and stored in a vacuum desiccator for future use.
[0036] Get 50 grams of the gained arsenic removal agent, fill and pretreat the arsenic removal agent according to the method in Example 1, then inject the arsenic removal agent with 500ppb arsenic (as Ph. 3 form) of naphtha, keep the liquid space veloc...
Embodiment 3
[0038] Take 50 grams of the arsenic removal agent prepared by the method in Example 2, fill it in a fixed-bed reactor with an inner diameter of 33 mm, and use hydrogen-nitrogen mixed gas (H 2 / N 2 (v / v)=1:1) after reduction for 4 hours, the temperature was lowered to below 50°C. Then use a metering pump to inject 500ppb arsenic (as AsPh 3 form) of naphtha, keep the liquid space velocity at 2.5h -1 After 200 hours of continuous treatment, the arsenic concentration at the outlet was detected to be less than 5.0ppb.
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