GB743942A - Improvements in or relating to heat recovery in a gas fluidized-solids contacting operation - Google Patents

Improvements in or relating to heat recovery in a gas fluidized-solids contacting operation

Info

Publication number
GB743942A
GB743942A GB19267/53A GB1926753A GB743942A GB 743942 A GB743942 A GB 743942A GB 19267/53 A GB19267/53 A GB 19267/53A GB 1926753 A GB1926753 A GB 1926753A GB 743942 A GB743942 A GB 743942A
Authority
GB
United Kingdom
Prior art keywords
solids
heat exchanger
line
coarse
fines
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB19267/53A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
Esso Research and Engineering Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Exxon Research and Engineering Co, Esso Research and Engineering Co filed Critical Exxon Research and Engineering Co
Publication of GB743942A publication Critical patent/GB743942A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/1836—Heating and cooling the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/005—Separating solid material from the gas/liquid stream
    • B01J8/0055—Separating solid material from the gas/liquid stream using cyclones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
    • B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
    • B01J8/32—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique with introduction into the fluidised bed of more than one kind of moving particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/00106—Controlling the temperature by indirect heat exchange
    • B01J2208/00265—Part of all of the reactants being heated or cooled outside the reactor while recycling
    • B01J2208/00274—Part of all of the reactants being heated or cooled outside the reactor while recycling involving reactant vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
    • B01J2208/00008—Controlling the process
    • B01J2208/00017—Controlling the temperature
    • B01J2208/0053—Controlling multiple zones along the direction of flow, e.g. pre-heating and after-cooling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Catalysts (AREA)

Abstract

<PICT:0743942/IV(a)/1> In a hydroforming process in which a fluidized catalyst is contacted with a hydrocarbon vapour and the effluent vapour stream containing less than about 0.001 lbs. per cubic foot of fine catalyst is passed through a heat exchanger, the deposition of fine solids in the heat exchanger is prevented by adding extraneous non-abrasive solids of larger particle size than the fines to the effluent vapour stream prior to passage through the heat exchanger, passing cooled effluent vapour from the exchanger to a separator to remove the coarser particles, and reinjecting these particles into the vapour stream passing to the heat exchanger. The fine solids present in the effluent stream may have an average size of less than 20 microns and the coarse solids a size of more than 80 microns. The coarse solids may be added in an amount to increase the total solids content to at least 0.001 lbs. per cubic foot. Smooth sand or microspheres of aluminium silicate or alumina are suitable coarse solids. In the apparatus shown, the product stream containing catalyst fines is removed from reactor 10 through line 15 and mixed with coarse solids from line 17; the mixture passes through heat exchanger 18 where it heats the hydrocarbon feed and/or the recycle hydrogen-containing gas for the hydroforming reaction. The coarse particles are removed in separator 30 and recycled. The product still containing catalyst fines passes through line 33 to scrubber 35 where the fines are removed by contact with a condensed polymer fraction which is recycled through line 39.ALSO:<PICT:0743942/III/1> In a process in which a fluidized solid is contacted with a gas or vapour and the effluent gas, stream containing less than about 0.001 lbs. per cub. ft. of fine solid particles is passed through a heat exchanger, the deposition of fine solids in the heat exchanger is prevented by adding extraneous non-abrasive solids of larger particle size than the fines to the effluent gas stream prior to passage through the heat exchanger, passing cooled effluent gas from the exchanger to a separator to remove the coarser particles, and reinjecting these particles into the gas stream passing to the heat exchanger. The fine solids present in the effluent stream may have an average size of less than 20 microns and the coarse solids a size of more than 80 microns. The coarse solids may be added in an amount to increase the total solids content to at least 0.001 lbs. per cub. ft. Smooth sand or microspheres of aluminium silicate or alumina are suitable coarse solids. In the apparatus shown, hydroforming of hydrocarbons is carried out in reactor 10 and the product stream containing catalyst fines is removed through line 15 and mixed with coarse solids from line 17; the mixture passes through heat exchanger 18 where it heats the hydrocarbon feed and/or the recycle hydrogen-containing gas for the hydroforming reaction. The coarse particles are removed in separator 30 and recycled. The product still containing catalyst fines passes through line 33 to scrubber 35 where the fines are removed by contact with a condensed polymer fraction which is recycled through line 39. Reference is also made to the use of the process in coking and in the regeneration of catalyst used for cracking.
GB19267/53A 1952-12-18 1953-07-10 Improvements in or relating to heat recovery in a gas fluidized-solids contacting operation Expired GB743942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US743942XA 1952-12-18 1952-12-18

Publications (1)

Publication Number Publication Date
GB743942A true GB743942A (en) 1956-01-25

Family

ID=22119318

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19267/53A Expired GB743942A (en) 1952-12-18 1953-07-10 Improvements in or relating to heat recovery in a gas fluidized-solids contacting operation

Country Status (4)

Country Link
BE (1) BE524996A (en)
FR (1) FR1086555A (en)
GB (1) GB743942A (en)
NL (2) NL181868B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140144A (en) * 1981-11-23 1984-11-21 Ahlstroem Oy Method for recovering heat from gases containing substances which contaminate heat transfer surfaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140144A (en) * 1981-11-23 1984-11-21 Ahlstroem Oy Method for recovering heat from gases containing substances which contaminate heat transfer surfaces

Also Published As

Publication number Publication date
BE524996A (en)
NL80999C (en)
FR1086555A (en) 1955-02-14
NL181868B (en)

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