US2938233A - Pellet formation - Google Patents

Pellet formation Download PDF

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Publication number
US2938233A
US2938233A US535721A US53572155A US2938233A US 2938233 A US2938233 A US 2938233A US 535721 A US535721 A US 535721A US 53572155 A US53572155 A US 53572155A US 2938233 A US2938233 A US 2938233A
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US
United States
Prior art keywords
mass
clay
pellets
revolving
coating material
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 - Lifetime
Application number
US535721A
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English (en)
Inventor
Nack Herman
George F Sachsel
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.)
G & A Lab Inc
G & A Laboratories Inc
Original Assignee
G & A Lab Inc
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
Priority to BE551194D priority Critical patent/BE551194A/xx
Application filed by G & A Lab Inc filed Critical G & A Lab Inc
Priority to US535721A priority patent/US2938233A/en
Priority to GB26319/56A priority patent/GB813552A/en
Priority to FR1160384D priority patent/FR1160384A/fr
Priority to DEG20595A priority patent/DE1033188B/de
Application granted granted Critical
Publication of US2938233A publication Critical patent/US2938233A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/16—Auxiliary treatment of granules
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J3/00—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms
    • A61J3/005—Coating of tablets or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/565—Mixing liquids with solids by introducing liquids in solid material, e.g. to obtain slurries
    • B01F23/566—Mixing liquids with solids by introducing liquids in solid material, e.g. to obtain slurries by introducing liquids in a fluidised bed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/62—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis comprising liquid feeding, e.g. spraying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/404—Mixers using gas or liquid agitation, e.g. with air supply tubes for mixing material moving continuously therethrough, e.g. using impinging jets
    • 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
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • 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
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • B01F27/1144—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections with a plurality of blades following a helical path on a shaft or a blade support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
    • B01F33/8363—Mixing plants; Combinations of mixers combining mixing with other treatments with coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/16—Auxiliary treatment of granules
    • B29B2009/163—Coating, i.e. applying a layer of liquid or solid material on the granule
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/16—Auxiliary treatment of granules
    • B29B2009/166—Deforming granules to give a special form, e.g. spheroidizing, rounding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/51—Use of fluidized bed in molding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/101—Aggregate and pellet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated

Definitions

  • This invention relates to a method of forming pellets coated with a finely divided material wherein the coating material may be of the same composition as the pellets or of a composition difierent from the pellet material.
  • pellets produced by the prilling process it is usually necessary to coat the pellets produced by the prilling process after they leave the prilling tower by means of an additional coating step.
  • the disadvantages of the stagnant bed method of pelleting and coatingmaterials are the inefilcient cooling of the pellets and the deformation of the pellets upon impact with the mass of finely divided particles of material, which particles are substantially motionless with respect to each other.
  • Pellets produced by sprinkling or dropping the material to be pelleted into a mass of finely divided coating material in a rotating drum, although substantially spherical in shape, are nonuniform in size, therefore requiring an additional step of classification when uniform sized pellets are desired.
  • Fig. 1 is a diagrammatic view partly in section of a pelleting and coating apparatus showing also means for recirculating the coating material;
  • Fig. 2 is a sectional view of the pelleting and coating mixer taken on the line 2-2 of Fig. 1.
  • this invention comprises supplying a finely divided or powdered coating material container having situated therein rotary means shown in the drawings as spirally shaped mixing blades 12 rotated by the drive shaft 11.
  • the amount of coating material supplied to the container is sufiicient so that by adjusting the speed of rotation of the rotary mixing means the surface level of the rapidly revolving mass of coating material rises to just below the arc of travel of the mixing means above the axis of rotation.
  • Rotation of the mixing means imparts a revolving movement to the mass with beating or mixing of air into the mass while also causing the finely divided particles of material to randomly move with re- 2,938,233 Patented May 31, 19,60
  • the mass of finely divided coating, material is a revolving internally agitated mass of finely divided particles having an appearance of a semi-fluid solid.
  • the coating material in this condition, droplets of the material to be pelleted are dropped or sprayed into the coating material in a direction transverse to the direction of the aerated or gas-expanded masss circum- :ferential revolution. While being mixed and revolved with the mass of revolving internally agitated coating particles the droplets are coated with the coating material and cooled.
  • the pellets removed from the revolving mass of coating material are substantially spherical in shape and of uniform size, the size being determined by the initial size of the droplets of the material to be pelleted supplied to the mass of coating material.
  • the particular apparatus shown in the drawings is primarily useful for the pelleting of thermoplastic materials, such-as rosin, and the coating of the pellets with such ma terials as finely divided clay.
  • the process is especially useful in the production of pellets of iodine disproportionated rosin having free flowability and good storageability imparted to the pellets by means of coatings of attapulgite clay according to the invention disclosed and claimed in US. Patent No. 2,797,211.
  • the process of this invention is specifically described with respect to the use of the iodine disproportionated rosin and attapulgite clay as a coating material in the operation of the apparatus shown in the drawings, it is to be. understood that bther materials to be pelleted and other coating materials may be used.
  • the numeral 10 refers to an j'open-top mixing container having situated therein a rotary mixer or blender comprised of a drive shaft 11 rotated by some suitable means not shown and having supported thereon by support means 13 spiral. ribbon mixing blades 12.
  • Conveniently situated in the bottom of the container 10 is an opening 14 surrounded by the wall. 15.
  • a gate valve 16 By opening gate valve 16 portions of the clay mass 33 and the solidified and coated pellets 32 are removed from the container and dropped onto the screen 19 upon which the solidified and coated pellets 32 are separated from the excess clay and removed to a suitable container 24 through the opening 23 in the enclosure wall 22.
  • the excess clay separated from the pellets is passed to a clay storage tank 20 and is recycled to the container 10 through the pipe 25 and by means of the conveyors 26 and 28 connected by the pipe 27 and through the hopper 29.
  • the enclosure walls 21 and 22 encase the opening 14, the screen 19 and the storage tank 20 so as to prevent the spread of dust resulting from the screening operation.
  • the numeral 17 designates a pipe or conduit leading from a suitable source of molten rosin, the source of the rosin not being shown.
  • the section of the pipe 17 situated above the open top of the container 10 contains a multiplicity of nozzles designated by the numeral 18.
  • the rosin is emitted from the nozzles 18 in the form of molten drop lets or in the form of a stream which breaksup into droplets before contacting the clay mass in the container 10'.
  • the size and form of the molten rosin pellets may be controlled by the shape of the nozzles 18 and the size of the nozzle openings.
  • The. amount of clay in the container 10 is controlled sothat by adjusting the speed of rotation of the mixing blades 12 the surface level 33 of the rapidly moving clay mass 30 rises to just below the arc of travel of the mixing blades 12 above the axis of rotation of the blades.
  • the rise in the surface level of the clay mass is accompanied with the beating and blending of air into the clay mass by the mixing blades.
  • the air blended into the mass of clay acts to expand the mass and, in a sense, acts as distance of only 7.5 to Sinches.
  • a lubricant for the clay particles enhance the random movement of the particles with respect to each other while the mass is revolved, thereby presenting a revolving internally agitated .mass of clay conditioned into a state of fluidity.
  • the aerated or air-expanded revolving mass of clay quickly cools the molten rosin droplets without agglomeration.
  • the impact resistance of the surface of the aerated or air-expanded mass of clay is decreased, practically eliminating deformation of the rosin droplets on contact with surface of the mass.
  • the rosin droplets revolve with the clay mass, they are cooled and coated with a thin adherent film of the clay, resulting in the desired clay coated rosin pellets.
  • the amount of clay in the container is such that the surface level 33 of the revolving clay is substantially above the arc of travel of the rotating mixing blades 12 the pellets produced are elongated, stringy, and friable.
  • the surface of the clay mass moves slowly and with an undulating movement, the undulating movement corresponding to the passage of the mixing blades underneath the surface of the clay mass
  • the surface level of the revolving clay mass about 1 inch above the arc of travel of the mixing blades, the linear speed of the surface of the clay. mass increases but still with an undulating motion.
  • the linear speed of the clay surface was measured and found to be approximately to 80 inches per minute. With the level of the revolving clay mass reduced to about 1 to 1.5 inches below the arc of travel of the mixing blades, the linear speed of the clay surface increases noticeably and approaches the mixing blade linear speed which was calculated to be about 1800 inches per minute. In this instance, the volume of the .clay mass upon being revolved increased by approximately 20 percent over the volume of the clay mass before revolving and air-expanding the mass by the mixing operation. Thus, the air-expanded clay mass represented arevolving fluidized or semifluidized solid having a volume ratio of about five parts solid to one part gas. The results of the runs under these. described conditions are tabulated below. In each of the runs the speed of rotation of the mixing blades was constant.
  • the finely divided coating material may be of the same composition as the material being pelleted. While reference has been made to finely divided coating material, it is, of course, understood that this has reference to either a powdered material or to particles of larger sizes but which are nevertheless smaller than the pellets In the pelleting and coating of some materials requiring large amounts of heat transfer from the pellets to the mass of coating material, some means of cooling the coating material may be desirable.
  • Cooling of the coating material may be easily accom plished during recycling such as bythe passage of a cooling medium through -a jacket cooler suitably situated about the conveyors 26 and 28 in Fig. 1.
  • the container 10 could be jacketed also for the passage of a cooling medium.
  • a bladed mixer means is rotated in a bed of particles of finely divided solid coating material having liquid droplets of a solidifiable material fixed therewith, and while a gas is mixed in said bed during rotation to expand the volume of said bed,to produce an internally, rotationally agitated mass revolving in the direction of said.
  • a method for preparing spherical pellets of a solidifiable material coated with finely divided particles of a solid coating material comprising: rotating a bladed mixer means in a mass of the finely divided particles to mix a gas in said mass, and expand the volume of said mass during said rotating, to revolve said mass of finely divided particles and agitate said particles, and to condition said mass to a state of'fiuidity whereby said particles move randomly with respect to each other within the mass; maintaining the, top surface of said mass during said rotating above the axis of rotation of said mixer means and below the top of the arc of rotation of said mixer means; introducing liquid droplets of the solidifiable materialint'o the surface of the mass during said rotating with said'mass being at a temperature below the solidification point of the solidifiable material; and removing said pellets as solidified droplets of the. solidifiable material coated with tihefinely divided particles of the solid coating material.
  • a method for preparing spherical pellets of rosin coated with finely divided particles of clay comprising: supplying a mass of finely divided particles of clay to a mixer having mixing blades revolving to mix air at atmospheric pressure with said mass, to expand the volume of said mass, to revolve said mass of finely divided particles and agitate said particles, and to condition said mass to a state of fluidity whereby said particles move randomly with respect to each other within the mass; maintaining the top Surface of the revolving mass of clay above the axis of rotation of said revolving blades and said revolving blades having an arc of travel 10 during rotation that extends partially above the top surface; introducing liquid droplets of molten rosin into the air-expanded, revolving, conditioned clay mass in a direction transverse to the direction of the circumferential revolution of the mass, said mass being at a temperature 15 2,726,852

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dispersion Chemistry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Glanulating (AREA)
US535721A 1955-09-21 1955-09-21 Pellet formation Expired - Lifetime US2938233A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE551194D BE551194A (is") 1955-09-21
US535721A US2938233A (en) 1955-09-21 1955-09-21 Pellet formation
GB26319/56A GB813552A (en) 1955-09-21 1956-08-28 Method of making pellets coated with a finely divided material
FR1160384D FR1160384A (fr) 1955-09-21 1956-09-20 Procédé et appareil pour former des grains enrobés d'une matière finement divisée
DEG20595A DE1033188B (de) 1955-09-21 1956-09-20 Verfahren zum Herstellen mit einer duennen Schicht ueberzogener kleiner Kugeln, Pillen od. dgl.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US535721A US2938233A (en) 1955-09-21 1955-09-21 Pellet formation

Publications (1)

Publication Number Publication Date
US2938233A true US2938233A (en) 1960-05-31

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Application Number Title Priority Date Filing Date
US535721A Expired - Lifetime US2938233A (en) 1955-09-21 1955-09-21 Pellet formation

Country Status (5)

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US (1) US2938233A (is")
BE (1) BE551194A (is")
DE (1) DE1033188B (is")
FR (1) FR1160384A (is")
GB (1) GB813552A (is")

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026568A (en) * 1958-11-14 1962-03-27 Schuller Services Ltd Method for producing coated bitumen pellets
US3036338A (en) * 1959-01-08 1962-05-29 G & A Lab Inc Coating and pelletizing of fusible materials
US3070837A (en) * 1957-02-14 1963-01-01 Montedison Spa Process and apparatus for the preparation of granules
US3071815A (en) * 1958-09-09 1963-01-08 Allied Chem Process for producing free flowing oil soluble fusible organic dyestuffs
US3083411A (en) * 1958-10-07 1963-04-02 Chain Belt Co Method for seeding fines
US3085870A (en) * 1959-04-13 1963-04-16 Ici Ltd Granular materials
US3186102A (en) * 1959-06-02 1965-06-01 English Clays Lovering Pochin Method of drying an insoluble particulate material
US3207824A (en) * 1962-06-22 1965-09-21 Wisconsin Alumni Res Found Process for preparing agglomerates
US3270100A (en) * 1962-08-01 1966-08-30 Delvan Mfg Company Method for making capsules by interfacial polymerization
US3861849A (en) * 1971-06-15 1975-01-21 Carborundum Co Apparatus for producing oxide refractory material having fine crystal structure
US3976563A (en) * 1975-03-07 1976-08-24 Bell Telephone Laboratories, Incorporated Dry reclamation of wire scrap
US4073838A (en) * 1974-08-12 1978-02-14 Boehringer Ingelheim Gmbh Granulating process
US4630405A (en) * 1985-02-27 1986-12-23 Roto-Finish Company, Inc. Finishing chamber and finishing machine comprising the same
US4764329A (en) * 1987-06-12 1988-08-16 The United States Of American As Represented By The Secretary Of The Army Producing explosive material in granular form
US5413023A (en) * 1985-12-27 1995-05-09 Mcdonnell Douglas Corporation Elastomeric prepreg roving composite
US5682004A (en) * 1991-09-18 1997-10-28 Wasagchemie Sythen Gmbh Apparatus for reduction of the grain size of crystalline explosive
US5801453A (en) * 1996-06-11 1998-09-01 United Technologies Corporation Process for preparing spherical energetic compounds
US20100196708A1 (en) * 2007-08-27 2010-08-05 Borealis Technology Oy Equipment and process for producing polymer pellets

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139465A (en) * 1959-05-29 1964-06-30 Dow Chemical Co Pelleting method
DE1122086B (de) * 1959-06-25 1962-01-18 Basf Ag Verfahren zur Puderung koerniger Mineralduengemittel
CN108013491B (zh) * 2016-11-04 2023-09-15 内蒙古伊利实业集团股份有限公司 一种趣味珠生产设备及方法
CN111617689A (zh) * 2020-06-13 2020-09-04 郭侠 一种花岗岩涂料制备系统
CN112439657B (zh) * 2020-11-17 2021-11-30 杭州饱乐食品有限公司 一种麦片表面快速精准喷涂冻干粉的系统及喷涂方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US857756A (en) * 1906-08-29 1907-06-25 George C Erdner Method of making shot.
US2457962A (en) * 1945-02-19 1949-01-04 Phillips Petroleum Co Agglomeration of powdered material
US2484792A (en) * 1945-08-31 1949-10-11 Gilman B Mollring Process of making binary asphaltic particles
US2574357A (en) * 1948-05-05 1951-11-06 Continental Can Co Method of and apparatus for forming solder pellets
US2726852A (en) * 1952-08-08 1955-12-13 Straba Handels Ag Method and apparatus for preparing coated particle compositions

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US857756A (en) * 1906-08-29 1907-06-25 George C Erdner Method of making shot.
US2457962A (en) * 1945-02-19 1949-01-04 Phillips Petroleum Co Agglomeration of powdered material
US2484792A (en) * 1945-08-31 1949-10-11 Gilman B Mollring Process of making binary asphaltic particles
US2574357A (en) * 1948-05-05 1951-11-06 Continental Can Co Method of and apparatus for forming solder pellets
US2726852A (en) * 1952-08-08 1955-12-13 Straba Handels Ag Method and apparatus for preparing coated particle compositions

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3070837A (en) * 1957-02-14 1963-01-01 Montedison Spa Process and apparatus for the preparation of granules
US3071815A (en) * 1958-09-09 1963-01-08 Allied Chem Process for producing free flowing oil soluble fusible organic dyestuffs
US3083411A (en) * 1958-10-07 1963-04-02 Chain Belt Co Method for seeding fines
US3026568A (en) * 1958-11-14 1962-03-27 Schuller Services Ltd Method for producing coated bitumen pellets
US3036338A (en) * 1959-01-08 1962-05-29 G & A Lab Inc Coating and pelletizing of fusible materials
US3085870A (en) * 1959-04-13 1963-04-16 Ici Ltd Granular materials
US3186102A (en) * 1959-06-02 1965-06-01 English Clays Lovering Pochin Method of drying an insoluble particulate material
US3207824A (en) * 1962-06-22 1965-09-21 Wisconsin Alumni Res Found Process for preparing agglomerates
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US20100196708A1 (en) * 2007-08-27 2010-08-05 Borealis Technology Oy Equipment and process for producing polymer pellets
US9212240B2 (en) * 2007-08-27 2015-12-15 Borealis Technology Oy Equipment and process for producing polymer pellets
US20160059440A1 (en) * 2007-08-27 2016-03-03 Borealis Technology Oy Equipment and process for producing polymer pellets
US10744678B2 (en) * 2007-08-27 2020-08-18 Borealis Technology Oy Equipment and process for producing polymer pellets
US11020878B2 (en) 2007-08-27 2021-06-01 Borealis Technology Oy Equipment and process for producing polymer pellets

Also Published As

Publication number Publication date
BE551194A (is")
FR1160384A (fr) 1958-07-15
DE1033188B (de) 1958-07-03
GB813552A (en) 1959-05-21

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