 DC to AC inverter with neutral having a resonant circuit |
| The present invention provides an improved inverter for converting a DC voltage into three phase AC ... |
|
| Power conversion system with dual permanent magnet generator having prime mover start capability |
| In accordance with the present invention, a dual permanent magnet generator is used in a starting/... |
|
| Starter/generator system with variable-frequency exciter control |
| In accordance with the present invention, a control for a brushless generator avoids the problems ... |
|
| Rectifying device for achieving a high power efficiency |
| OF THE INVENTION One embodiment of the present invention will be explained below with reference to ... |
|
| Metallic silicide production |
| What is claimed is: 1. A method of forming a metallic silicide layer on a substrate, including the ... |
|
| Method for electrically connecting non corrodible anodes to the corrodible core of a power supply cable |
| OF THE INVENTION The method of the present invention is particularly suited to connect one or more ... |
|
| Process of solvent-free lamination using isocyanate/amine adhesives |
| We claim: 1. A method for the production of laminated films employing a two-component non-solvent ... |
|
| Fuel cell system |
| In accordance with the principles of the present invention, the above and other objectives are ... |
|
| Fuel cell |
| The object of the present invention is to provide a fuel cell which can be replenished easily with ... |
|
|
Heavy crude conversion
| Details |
Inventors: Hamner, Glen P.;
Assignee: Exxon Research and Engineering Company (Linden, NJ)
Primary Examiner: Gantz; Delbert E.
Assistant Examiner: Schmitkons; G. E.
Attorney, Agent or Firm: Proctor; Llewellyn A.
This invention relates to novel catalysts, of two distinct types, useful for the catalytic hydroconversion of the 1050.degree.F.+ hydrocarbon material contained in heavy crudes and residua such that the resulting product will be suitable for further processing in conventional refinery operations allowing maximization of clean liquid products. Catalysts, which include Group VIB and Group VIII metals, preferably in admixture, and preferably including a Group IVA metal, notably germanium, having certain critical ranges of physical characteristics inclusive of large uniform pore sizes, are used for the conversion, these having been shown to possess improved catalytic activity and selectivity for the hydroconversion of the 1050.degree.F.+ materials of the heavy feeds and residua. Novel methods are described for the preparation of such catalysts, as well as for use of such catalysts. One of the catalysts, i.e., one having properties inclusive of a large number of pores in the 100-275A pore size diameter range, is particularly suitable as a first stage catalyst and the other, which has properties inclusive of a large number of pores in the 100A-200A pore size diameter, is especially suitable as a second stage catalyst for use in processing the effluent of said first stage. |
|
DETAILED DESCRIPTION Having described the invention, what is claimed is: 1.
A process for the demetallization and conversion of the 1050.
degree.
F.
+ materials of a heavy metals containing hydrocarbon feed to 1050.
degree.
F.
- material comprising contacting said feed in the presence of added hydrogen, with a catalyst characterized as comprising a composite of from about 5 to about 30 percent of a Group VIB metal, from about 1 to about 12 percent of a Group VIII metal, or admixture of said Group VIB and Group VIII metals, and a porous inorganic oxide support, said catalyst including a combination of properties comprising, when the catalyst is of size ranging up to 1/50 inch average particle size diameter, at least about 20 percent of its total pore volume of absolute diameter within the range of about 100A to about 200A; when the catalyst is of size ranging from about 1/50 inch up to 1/25 inch average particle size diameter, at least about 15 percent of its total pore volume of absolute diameter within the range of about 150A to about 250A; when the catalyst is of size ranging from about 1/25 inch to about 1/8 inch average particle size diameter, at least about 15 percent of its total pore volume of absolute diameter within the range of about 175A to about 275A; a surface area ranging at least about 200 m.
sup.
2 /g to about 600 m.
sup.
2 /g and a pore volume ranging from about 0.
8 cc/g to about 3.
0 cc/g, at severity sufficient to convert at least about 30 percent of the 1050.
degree.
F.
+ material to 1050.
degree.
F.
- material, while removing at least about 80 percent of the heavy metals from the feed.
2.
The process of claim 1 wherein from about 40 percent to about 60 percent of the 1050.
degree.
F.
+ material is converted to 1050.
degree.
F.
-, and from about 85 percent to about 90 percent of the metals are removed from the bed.
3.
The process of claim 1 wherein the feed is characterized as follows:
______________________________________
Gravity, .
degree.
API -5 to 20
Heavy Metals, ppm 5-1000
1050
|
| Related patents |
|
|
Hydrocarbon hydrotreating catalyst composition
What is claimed is: 1. A catalyst composition having an improved catalyst life and suitable for use in hydrodesulfurizing a hydrocarbon feedstock containing ...
|
|
|
Process for the hydrotreating of heavy hydrocarbon streams
OF THE INVENTION The present invention is directed to a novel process for the hydrotreating of heavy hydrocarbon feedstocks. Such feedstocks will contain asphaltenes, ...
|
|
|
Multi-stage process for demetalation and desulfurization of petroleum oils
OF THE INVENTION The hydrocarbon feed to the process of this invention can be a whole crude. However, since the high metal and sulfur components of a crude oil tend to ...
|
|
|
Converter circuit
I claim: 1. In a DC to DC converter having a transformer, a secondary winding on said transformer connected to feed a load, a primary winding on said transformer, means ...
|
|
|
Switching regulator having parallel diode isolated primary windings and plural secondary windings
The object of the present invention is to provide a switching regulator using one switching control circuit and one switching means and applying chopped voltages to many ...
|
|
|
Pulsed power converter with multiple output voltages
A distributed power system for providing multiple output voltages, including pulsed voltages, to a solid-state phased-array radar T/R module, for example, comprises: an ...
|
|
|
Overload protection for a switch mode power supply
FIG. 1 illustrates an zero voltage switching forward converter or power supply 300. A protection circuit 400, embodying an inventive feature, provides protection to ...
|
|
|
Zero voltage, zero current, resonant converter
An embodiment of the invention is shown in FIG. 2, wherein 10 refers to a main transformer having primary windings 12 and 14, a core 16, and secondary windings 18 and 20...
|
|
|
Current-mode control device and switching power supply employing same
OF EMBODIMENTS OF THE INVENTION Hereinafter, the preferred embodiments of the present invention are explained in detail with reference to the drawings. FIG. 1 shows a ...
|
|
|
FET power converter with reduced switching loss
While the invention is susceptible to various modifications and alternative forms, certain illustrative embodiments thereof have been shown by way of example in the ...
|
|
|
Fuel Cells 
