Method for depositing catalyst metals into zeolite to produce hydrocarbon processing catalyst
A catalyst carrier and zeolite technology, which is applied in the field of preparing non-acidic hydrocarbon processing catalysts and non-acidic monofunctional reforming catalysts, can solve the problems of damaging the catalyst's operating performance, and achieve the effect of eliminating or minimizing debris deposition
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Embodiment 1
[0087] According to the process disclosed in US Pat. No. 5,348,924, a 28% (weight) alumina binder is used to bond the zeolite L extrudate. Through the process of the present invention, a certain amount of the above zeolite L extrudate (A=800g) Loading W = 0.64 wt% platinum concentration.
[0088] By combining 9.7055g of tetraaminoplatinum dichloride monohydrate (Platinum assay: 55.53% by weight, 0.02756mol), 4.3211g of potassium hydroxide particles (86% purity, 0.06623mol) and 7.2717g of potassium chloride (0.09754 mol) was dissolved in sufficient water, and the solution with a total weight of 1440 g was prepared to prepare a platinum loading solution with an initial pH value of 12.5.
[0089] The above loading solution was placed in the tank and circulated at a rate of 600 ml / min. 800 g of extrudate were added to the circulating solution. After 15 hours, the platinum loading solution was drained to yield 1048 g of mother liquor. The pH of the mother liquor was determined t...
Embodiment 2
[0091] The catalysts in the following table were prepared using the procedure of Example 1.
[0092] Only one factor varied in catalysts A to E, and that was the endpoint pH of the loading solution. All five catalysts were tested under the same reforming conditions. Thus, this example shows how the endpoint pH of the loading solution affects the performance of the catalyst under reforming conditions.
[0093] The platinum is loaded on the catalyst using the full immersion method, which involves placing the extrudate in a mesh basket and immersing it in a tank. The loading solution was stored in a container at room temperature, pumped through a mesh basket containing catalyst, and returned to the loading solution storage container. The cycle is maintained for 90 minutes. Maintain good contact between the loading solution and the catalyst.
[0094] The endpoint pH varies with the ratio of KOH (base) to KCl (salt) added to the loading solution to achieve the desired potassium...
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