1. A process for fluidized catalytic cracking of a hydrocarbon feed stream to products, the process comprising:
blending coked catalyst and regenerated catalyst;
contacting said hydrocarbon feed stream with said blended catalyst within an outer wall of a riser to produce said products and coked catalyst;
regenerating a first portion of said coked catalyst to provide said regenerated catalyst; and
recycling a second portion of said coked catalyst through a passage disposed within said outer wall of said riser.
2. The process of claim 1 further comprising contacting said coked catalyst and regenerated catalyst in an inner riser isolated from said passage.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A backlit touch button assembly, comprising:
a circuit board;
at least one light source positioned on the circuit board; and
a reflecting plate and a marked strip attached to opposite sides of the circuit board;
wherein the reflecting plate defines at least one optical groove receiving the at least one light source, the at least one optical groove comprises a reflecting portion, the circuit board defines at least one through hole adjacent to the at least one light source, and the at least one through hole corresponds to the reflecting portion, the reflecting portion comprises a first reflecting surface, a second reflecting surface, and a third reflecting surface, and the first reflecting surface and the third reflecting surface meet the second reflecting surface, respectively.
2. The backlit touch button assembly of claim 1, wherein the first reflecting surface meets the second reflecting surface at 45\xb0.
3. The backlit touch button assembly of claim 2, wherein the third reflecting surface meets the second reflecting surface at 30\xb0.
4. The backlit touch button assembly of claim 1, wherein each optical groove further comprises a receiving portion communicating with the reflecting portion and adjacent to the first reflecting surface.
5. The backlit touch button assembly of claim 4, wherein the second reflecting surface is a roughened surface.
6. The backlit touch button assembly of claim 1, further comprising a diffusing sheet received in the at least one optical groove.
7. The backlit touch button assembly of claim 6, wherein the diffusing sheet is attached to the first reflecting surface, the second reflecting surface, and the third reflecting surface.
8. The backlit touch button assembly of claim 1, wherein the at least one light source is a light emitting diode.
9. The backlit touch button assembly of claim 1, wherein two positioning poles are formed on opposite sides of the reflecting plate, the circuit board defines two positioning holes, and the positioning poles engage in the positioning holes of the circuit board.
10. The backlit touch button assembly of claim 1, wherein the at least one through hole is substantially rectangular.
11. A backlit touch button assembly, comprising:
a circuit board;
at least one light source positioned on the circuit board; and
a reflecting plate and a marked strip attached to opposite sides of the circuit board;
wherein the reflecting plate defines at least one optical groove receiving the at least one light source, the at least one optical groove comprises a reflecting portion, the circuit board defines at least one through hole adjacent to the at least one light source, the at least one through hole corresponding to the reflecting portion, the reflecting portion comprises a reflecting surface reflecting light emitted thereon to the at least one through hole and away from the at least one light source.
12. The backlit touch button assembly of claim 11, wherein each of the at least one optical grooves further comprises a receiving portion communicating with the reflecting portion and adjacent to the first reflecting surface.
13. The backlit touch button assembly of claim 12, wherein the second reflecting surface is a rough surface.
14. The backlit touch button assembly of claim 11, further comprising a diffusing sheet received in the at least one optical groove.
15. The backlit touch button assembly of claim 14, wherein the diffusing sheet is attached to the first reflecting surface, the second reflecting surface, and the third reflecting surface.
16. The backlit touch button assembly of claim 11, wherein the at least one light source is a light emitting diode.
17. The backlit touch button assembly of claim 11, wherein two positioning poles are formed on opposite sides of the reflecting plate and the circuit board defines two positioning holes receiving the positioning poles.
18. The backlit touch button assembly of claim 11, wherein the at least one through hole is substantially rectangular.