Reduced-capacity moving-bed reactor with radial flow of the feedstock

Patent metadata

Field	Value
Publication number	US-10441933-B2
Application number	US-201615381807-A
Country	US
Kind code	B2
Filing date	Dec 16, 2016
Priority date	Dec 17, 2015
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

This invention describes a moving-bed catalyst reactor having radial flow of the feedstock called moving-bed radial reactor, consisting of 3 zones called upper hemispheric body (III), lateral zone (II), and lower hemispheric body (I), the three zones being connected together by means of flanges.

First claim

The invention claimed is:

1. A moving-bed reactor having a radial flow of a feedstock and having a gravitational flow of a catalyst comprising an upper hemispheric body (III), a lateral body (II), and a lower hemispheric body (I),
the upper hemispheric body (III) being provided with an intake pipe ( 6 ) for the feedstock and with legs ( 7 ) for introducing the catalyst communicating with conical elements ( 9 ) that provide access to an annular zone (IIa),
the annular zone (IIa) is located between a central collector ( 4 ) and an outer screen ( 3 ) over a radial distance of between 100 mm and 400 mm, said outer screen ( 3 ) being positioned parallel to the lateral body (II) of the reactor and at a certain distance from the latter, and the central collector ( 4 ) extending approximately along the longitudinal axis of symmetry of the reactor over the entire height of said annular zone (IIa) and continuing inside a lower hemispheric body (I),
the lower hemispheric body (I) carries drain legs ( 8 ) of the catalyst and a drain pipe ( 1 ) for the reaction effluents, said drain pipe ( 1 ) connected to a lower end of the central collector ( 4 ),
the outer screen ( 3 ) being supported by a supporting ring ( 2 ), which extends over the entire periphery of the lower hemispheric body (I) and which is attached to the lower hemispheric body (I), and the central collector ( 4 ) being closed at its upper end by a solid plate ( 5 ),
wherein the upper hemispheric body (III) is connected by flanges (B 3 , B 4 ) to the lateral body (II), and the lateral body being furthermore connected by flanges (B 1 , B 2 ) to the lower hemispheric body (I),
wherein the flange (B 4 ) and the lower end of the conical element ( 9 ) are positioned at the lower end of the upper hemispheric body (III), and
wherein the flange (B 3 ) and the solid plate ( 5 ) are positioned at the upper end of the lateral body (II), and provides access to the annular zone (IIa).

2. The reactor according to claim 1 , wherein the outer screen ( 3 ) consists of an assembly of scallop-shaped screen elements, extending longitudinally over the entire height of the annular zone (IIa).

3. A method using the reactor according to claim 1 , comprising:
feeding the feedstock into the reactor by the intake pipe ( 6 ) located in the upper part of an upper hemispheric body (III) of the reactor and enters into the annular zone (IIa) located inside the lateral body (II) by passing through the outer screen ( 3 ),
moving the feedstock through a catalytic bed contained in the annular zone (IIa) in an approximately radial manner, and the effluents resulting from a catalytic reaction are collected in the central collector ( 4 ), and then
continuously draining the effluents from said reactor through the drain pipe ( 1 ) that is reattached to the central collector ( 4 ),
admitting the catalyst into the annular zone (IIa) through legs ( 7 ) located in the upper hemispheric body (III) that communicate with said annular zone through conical elements ( 9 ), the catalyst flows gravitationally into said annular zone (IIa), and then is drained from the reactor through drain legs ( 8 ) located in the lower hemispheric body (I).

4. The method of claim 3 wherein the catalytic reaction is selected from the group consisting of catalytic reforming of gasolines, skeletal isomerization of olefins, metathesis for the production of propylene, oligocracking, and dehydration of alcohols.

5. A method of constructing the reactor according to claim 1 , comprising:
a) equipping the lower hemispheric body (I) with drain legs ( 8 ) for draining the catalyst, and with a drain pipe ( 1 ) for reaction effluents that is provided at its upper end which is suitable for reattachment to the central collector ( 4 ),
b) positioning the central collector ( 4 ) in the annular zone (IIa), and said central collector ( 4 ) is attached to the drain pipe ( 1 ) for draining the effluents,
c) closing said central collector ( 4 ) at its upper end by a solid plate ( 5 ),
d) attaching the lower hemispheric body (I) to the lateral body (II) by an assembly of flanges (B 1 ) and (B 2 ) carried by said lateral body (II) and said lower hemispheric body (I),
e) attaching an outer screen ( 3 ) or outer screen elements to a supporting ring ( 2 ) positioned in a unit formed by the lateral body (II) and the lower hemispheric body (I),
f) attaching the upper hemispheric body (III) to the lateral body (II) by an assembly of flanges (B 3 ) and (B 4 ), said upper hemispheric body (III) being previously equipped with a intake pipe ( 6 ) for introducing the feedstock and with legs ( 7 ) making possible the intake of the catalyst into the reactor.

Assignees

• Ifp Energies Now

Inventors

• Bazer-Bachi Frederic
• Lambert Fabian
• Plais Cecile

Classifications

• B01J2208/00752

  Feeding · CPC title

• C10G11/00

  Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils (cracking in direct contact with molten metals or salts C10G9/34) · CPC title

• B01J8/12 Primary

  moved by gravity in a downward flow · CPC title

• C10G35/12

  according to the "moving-bed" method · CPC title

• C07C6/04

  at a carbon-to-carbon double bond · CPC title