Weir quench and processes incorporating the same

Patent metadata

Field	Value
Publication number	US-9795941-B2
Application number	US-201314429594-A
Country	US
Kind code	B2
Filing date	Sep 29, 2013
Priority date	Sep 30, 2012
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

The present invention provides a weir quench, an apparatus utilizing the weir quench and processes incorporating the same. The weir quench incorporates an inlet having an inner diameter (Di) and an upper chamber having an inner diameter (Duc), wherein the inlet inner diameter (Di) is at least 90% of the upper chamber inner diameter (Duc). The apparatus constitutes a reactor having an outlet with an inner diameter fluidly coupled with the weir quench inlet, wherein the ratio of the reactor oulet inner diameter (Dr) to the weir quench inlet diameter (Di) is greater than one. The weir quench, and apparatus are advantageously utilized in processes utilizing a limiting reagent.

First claim

The invention claimed is:

1. A weir quench comprising an inlet having an inner diameter, an upper chamber having an inner diameter and at least one downcomer tube having an inner diameter, wherein the inlet inner diameter is at least 90% of the upper chamber inner diameter and wherein the ratio of the inner diameter of the inlet to the downcomer tube inner diameter is greater than 3.

2. The weir quench of claim 1 , wherein the ratio of the inlet inner diameter to the downcomer tube inner diameter is less than 6.

3. The weir quench of claim 2 , wherein the ratio of the inlet inner diameter to the downcomer tube inner diameter is at least 4 and less than 5.

4. The weir quench of claim 1 , wherein the at least one downcomer tube has an inner diameter of at least 1 inch.

5. The weir quench of claim 1 , wherein the ratio of the downcomer tube length to the downcomer tube inner diameter is from 3 to 8.

6. The weir quench of claim 1 , further comprising a lower chamber operatively disposed relative to the at least one downcomer tube, and wherein the lower chamber comprises a baffle.

7. The weir quench of claim 1 , wherein the placement of the downcomer tube is at least 0.1 inch below the ceiling of the lower chamber quench outlet.

8. The weir quench of claim 1 , wherein the lower quench outlet is at least one inch above the quench reservoir bottom.

9. An apparatus comprising: A reactor having an outlet with an inner diameter; and
A weir quench fluidly connected to the reactor and having an inlet with an inner diameter, an upper chamber having an inner diameter and at least one downcomer tube having an inner diameter,
Wherein the ratio of the reactor outlet inner diameter to the weir quench inlet inner diameter is greater than 1, the inlet inner diameter is at least 90% of the upper chamber inner diameter and wherein the ratio of the inner diameter of the inlet to the downcomer tube inner diameter is greater than 3.

10. The apparatus of claim 9 , wherein the at least one downcomer tube has an inner diameter of at least 1 inch.

11. The apparatus of claim 9 , wherein the ratio of the downcomer tube length to the downcomer tube inner diameter is from 3 to 8.

12. The apparatus of claim 9 , further comprising a lower chamber operatively disposed relative to the at least one downcomer tube, and wherein the lower chamber comprises a baffle.

13. A process for quenching the gaseous product stream from a chemical process comprising a limiting reagent comprising:
Providing the gaseous product stream from a reactor having an outlet with an inner diameter to a weir quench with an inlet having an inner diameter, an upper chamber having an inner diameter and at least one downcomer tube having an inner diameter, wherein the ratio of the reactor outlet inner diameter to the weir quench inlet inner diameter is greater than one, the inlet inner diameter is at least 90% of the upper chamber inner diameter and wherein the ratio of the inner diameter of the inlet to the downcomer tube inner diameter is greater than 3.

14. The process of claim 13 , further comprising using a reaction product as the quench flow.

15. The process of claim 13 , wherein the mass flow ratio of the quench flow to the product stream is at least 2.

16. The process of claim 13 , wherein the mass flow ratio of the quench flow to the product stream is less than 6.

17. The process of claim 13 , wherein the flow velocity of the product stream is less than 10 ft./s.

18. The process of claim 13 , wherein the temperature of the quench flow is greater than 20° C.

19. The process of claim 18 , wherein the temperature of the quench flow is less than 250° C.

Assignees

• Blue Cube Ip Llc

Inventors

• Tirtowidjojo Max M
• Bai Hua
• Luebbe Thomas U
• Mcmurray Victor E

Classifications

• F28C3/06

  the heat-exchange media being a liquid and a gas or vapour (temperators for cooling steam F22) · CPC title

• B01J2219/00123

  adding a temperature modifying medium to the reactants · CPC title

• B01J2219/00247

  Fouling of the reactor or the process equipment · CPC title

• B01J10/00

  Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor (B01J19/08 takes precedence; separation, e.g. distillation, also combined with chemical reactions B01D, {e.g. B01D3/009}) · CPC title

• B01J2219/00761

  Details of the reactor · CPC title