US 6,486,217 B2Granted

Throat and cone gas injector and gas distribution grid for slurry reactor (CJB-0004)

AssigneeExxonMobil Research and Engineering Company

InventorsMin Chang, Constantine Anastasios Coulaloglou, Edward Ching-Sheng Hsu

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Abstract

A gas distribution grid for a slurry reactor includes a plurality of gas injectors horizontally arrayed across, and extending through, an otherwise gas and liquid impervious plate. The injectors have a throat open at both ends, with a gas pressure reducing bore at one end which is the entrance end and with the other end opening into an upward opening cone. Flow diverting means in the injectors prevents slurry solids from entering the throat and being attrited by the high velocity gas jet exiting the bore into the throat. It is preferred that the gas injectors not protrude above the top surface of the grid and flat space is eliminated by means such as angular fillers, to prevent solids accumulation top of the grid. A chamber may be present at the junction of the bore and throat to prevent unrestricted expansion of the gas jet entering the throat. This is useful for injecting gas into a reactive hydrocarbon synthesis slurry in a slurry reactor, with reduced catalyst attrition and deactivation.

Claims4

Dependent claims

A CO hydrogenation process wherein a gas is injected into a reactor through a gas injector, wherein the improvement comprises:

passing the gas through a pressure reducing zone having a first gas entrance end and a first gas exit end, the reducing zone terminating at the first gas exit end in an orifice which opens into an entrance of an elongated, longitudinal first gas expansion zone;
passing the gas through the first gas expansion zone having a second gas entrance end and a second gas exit end, the second gas entrance end and the second gas exit end being at opposite ends of its longitudinal axis, an inner wall and a substantially constant cross-sectional area perpendicular to the axis, which area is larger than that of the orifice;
passing the gas through the exit end of the first gas expansion zone opening into a third gas entrance of a second gas expansion zone having the third gas entrance end and a third gas exit end at opposite ends of its longitudinal axis, an inner wall and a cross-sectional area perpendicular to the axis that increases from the third gas entrance to the third gas exit;
and
introducing the gas from the third gas exit into the reactor.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/738,844Filed 15 Dec 2000 · continuation in part
Priority: 21 Oct 1997
Published: US 2001/0018462 A130 Aug 2001
Granted: 26 Nov 2002
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

C10G 2/342
Apparatus, reactors: with moving solid catalysts
B01J 8/006
Separating solid material from the gas/liquid stream: by filtration
B01J 8/22
With liquid as a fluidising medium: gas being introduced into the liquid
B01J 8/44
According to "fluidised-bed" technique: fluidisation grids

Family

Application08/955,130Parent of this division · filed 21 Oct 1997
Application09/473,514Parent of this continuation-in-part · filed 28 Dec 1999
US 2001/0018462 A1Pre-grant publication · published 30 Aug 2001
US 6,199,835 B1Parent of this continuation-in-part
Application09/473,514Parent of this division
US 6,076,810 AParent of this division
US 6,486,217 B2This patent

From the US filing history. Foreign family members aren’t listed.