Mixer for continuous flow reactor

Patent metadata

Field	Value
Publication number	US-9700855-B2
Application number	US-201414456528-A
Country	US
Kind code	B2
Filing date	Aug 11, 2014
Priority date	Mar 15, 2007
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A mixer for a continuous flow reactor and methods for forming the mixer and the operation thereof. The mixer allows for segmentation of a primary reactant flow through a plurality of ports into many smaller flows that are injected as jets into a secondary reactant flow in channels of the mixer. The channel has a constant width dimension to enhance even flow distribution and local turbulence of the primary and secondary reactant flows. The constant width dimension of the channel and the size and number of the ports of the mixer can be configured to ensure the primary reactant flow injected into the channel directly impinges on a surface of the channel that is opposite the injection point at normal operating conditions.

First claim

What is claimed is:

1. A method of forming a mixer for a continuous flow reactor, comprising:
forming an elongate inner sleeve with an inside surface and an outside surface opposite the inside surface, where the inside surface defines an axial opening; and
forming an elongate outer sleeve having a first surface, a second surface opposite the first surface and a plurality of ports extending through the first surface and the second surface of the elongate outer sleeve, where the elongate outer sleeve has an inner diameter measured between the first surface through a longitudinal axis of the elongate outer sleeve that allows the elongate outer sleeve to be concentrically arranged with the elongate inner sleeve to form an annular channel that extends through the first end and the second end of the elongate inner sleeve.

2. The method of claim 1 , where forming the elongate outer sleeve provides the annular channel with a constant width dimension relative the inner diameter of the elongate outer sleeve in a range of 0.01 to 1.0.

3. The method of claim 1 , where forming the elongate outer sleeve provides the annular channel with a constant width dimension of about 3.2 cm.

4. The method of claim 1 , where forming the elongate inner sleeve provides the outside surface with an unbroken continuous wall having an arcuate surface.

5. The method of claim 1 , where forming the elongate outer sleeve provides each of the plurality of ports with a diameter relative to a width of the annular channel of 0.4.

6. The method of claim 1 , where forming the elongate outer sleeve provides the plurality of ports with a cross sectional area sufficient to accommodate delivery of a major flow volume into the annular channel of the mixer.

7. The method of claim 1 , including concentrically arranging the elongate outer sleeve with the elongate inner sleeve to form the annular channel for the continuous flow reactor.

8. A method of forming a continuous flow reactor, comprising:
providing an elongate core having a first exterior surface and a mounting shaft;
positioning a mixer around the mounting shaft, the mixer having:
an elongate inner sleeve with an inside surface defining an axial opening through which the mounting shaft passes, and an outside surface opposite the inner surface;
an elongate outer sleeve concentrically arranged with the elongate inner sleeve, the elongate outer sleeve having a first surface, a second surface opposite the first surface and a plurality of ports extending through of the first and second surface of the elongate outer sleeve, where the elongate outer sleeve has an inner diameter measured between the first surface through a longitudinal axis of the elongate outer sleeve so that the elongate outer sleeve is concentrically arranged with the elongate inner sleeve to form an annular channel that extends through the first end and the second end of the elongate inner sleeve; and

an elongate housing concentrically arranged around the mixer and at least a portion of the elongate core, where the first exterior surface of the elongate core and a first inner surface of the elongate housing to define a second segment of the annular channel, and where an interior surface of the elongate housing and the second surface of the elongate outer sleeve define an annular conduit having an inlet through which a fluid can pass into the annular conduit and through the plurality of ports into the annular channel.

9. A method of operating a continuous flow reactor, comprising:
providing an elongate inner sleeve with an inside surface and an outside surface opposite the inside surface, where the inside surface defines an axial opening that receives a mounting shaft that extends through a first end and a second end of the elongate inner sleeve;
positioning the elongate inner sleeve over the mounting shaft, where the mounting shaft extends through the first end and the second end of the elongate inner sleeve;
providing an elongate outer sleeve having a first surface, a second surface opposite the first surface and a plurality of ports extending through the first surface and the second surface of the elongate outer sleeve, where the elongate outer sleeve has an inner diameter measured between the first surface through a longitudinal axis of the elongate outer sleeve that allows the elongate outer sleeve to be concentrically arranged with the elongate inner sleeve; and
concentrically arranging the elongate outer sleeve with the elongate inner sleeve to form an annular channel for the continuous flow reactor that extends through the first end and the second end of the elongate inner sleeve.

10. The method of claim 9 , including segmenting a primary reactant flow with the plurality of ports; and
injecting the primary reactant flow segmented with the plurality of ports into a secondary reactant flow in the annular channel of the continuous flow reactor to provide a Jet Mixing Number of at least 0.9 and a time to homogeneity of less than 0.5 seconds for the primary and secondary reactant flows.

11. The method of claim 10 , where injecting the primary reactant flow into the secondary reactant flow includes proving the Jet Mixing Number of 1.0 to 2.0.

12. The method of claim 10 , including supplying the primary reactant flow at a flow rate that is at least twice that of the secondary reactant flow.

13. The method of claim 10 , where injecting the primary reactant flow includes providing a greater volumetric flow rate of the primary reactant flow through a first portion of the plurality of ports as compared to a second portion of the plurality of ports.

Assignees

• Bachman Gene W
• Jones Raymond M
• Cloeter Michael D
• Lipp Charles W
• Bartel Mark J
• Coomes Brady J
• Daigle Scott J
• Janda Steve F
• Dow Global Technologies Llc

Inventors

• Bachman Gene W
• Jones Raymond M
• Cloeter Michael D
• Lipp Charles W
• Bartel Mark J
• Coomes Brady J
• Daigle Scott J
• Janda Steve F

Classifications

• Y10T29/49826

  Assembling or joining · CPC title

• B23P19/00

  Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation {(connecting metal parts or objects by metal-working procedures B21J, B23K)}; Tools or devices therefor so far as not provided for in other classes (hand tools in general B25) · CPC title

• B01F2215/0036

  Operations & Transport · mapped topic

• B01F3/0865

  Operations & Transport · mapped topic

• B01F2005/0017

  Operations & Transport · mapped topic