Hydrocracking catalyst
A hydrocracking and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, inorganic chemistry, etc., can solve the problems of reduced active surface area and reduced unit cell size
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0057] In the preparation of the catalyst according to the invention, after mixing the zeolite with the binder and, if present, the second cracking component, an aqueous acid solution can be added to the mixture after it has been milled, extruded and calcined in a conventional manner. Any suitable monobasic acid can be used as the acid solution, such as nitric acid and acetic acid. During extrusion, conventional extrusion aids can be used; commonly used extrusion aids include Superfloc available from Nalco.
[0058] Extrusion can be carried out using any conventional commercially available extruder. Specifically, a screw extruder can be used to force the mixture through holes in a die plate to produce a catalyst extrudate having a desired shape, such as a cylinder or a trilobal shape. The extruded die is then cut to the appropriate length. If desired, the catalyst extrudate may be dried, for example at a temperature of 100-300° C. for 30 minutes to 3 hours, prior to calcinat...
Embodiment 1
[0121] In these first tests, the activity of a number of comparative catalysts was evaluated against the catalysts of the invention. The results are given in Table 3.
[0122] Table 3 shows: when using the ultra-stable zeolite Y material with higher unit cell size (higher than 24.40 Å) to prepare hydrocracking catalyst, with the change of unit cell size, surface area, SAR and micropore volume, No increase in activity (expressed as T demand): For a net conversion of 65 wt%, comparative catalysts A and B exhibit more or less the same temperature demand (T demand).
[0123] Those skilled in the art will generally appreciate that below a certain unit cell size, further reductions in the unit cell size of the zeolite support (expressed as a decrease in aluminum content - also expressed as an increase in SAR) will result in a loss of activity , that is, a higher temperature is necessary to achieve the same conversion rate. This expectation is indeed confirmed by Comparative Cataly...
Embodiment 2
[0131] In this example, the catalysts of the present invention were evaluated for their hydrocracking selectivity to middle distillate hydrocarbons.
[0132] Middle distillates are here understood to be hydrocarbons in the kerosene plus diesel boiling range.
[0133] In order to get a true comparison of selectivities between catalysts, it is necessary to compare the selectivities under conditions of constant stability, ie at the same T requirement. Therefore, Table 4 compares the product selectivity of the comparison catalyst and the catalyst of the present invention on this basis. The selectivity of the following products is specifically recorded: C 1 -C 4 Hydrocarbon, C 5 -150°C (naphtha) hydrocarbons and 150°C-370°C hydrocarbons (kerosene and diesel).
[0134] It can be seen that the product selectivity is very similar.
[0135] Catalyst number
[0136] 1 Properties of zeolites
PUM
| Property | Measurement | Unit |
|---|---|---|
| unit cell dimension | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More