GB654246A - Improvements in or relating to a method of forming pellets of phthalic anhydride andother substances having a sharp crystallising point - Google Patents

Improvements in or relating to a method of forming pellets of phthalic anhydride andother substances having a sharp crystallising point

Info

Publication number
GB654246A
GB654246A GB9697/47A GB969747A GB654246A GB 654246 A GB654246 A GB 654246A GB 9697/47 A GB9697/47 A GB 9697/47A GB 969747 A GB969747 A GB 969747A GB 654246 A GB654246 A GB 654246A
Authority
GB
United Kingdom
Prior art keywords
drum
pellets
region
point
temperature
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
GB9697/47A
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.)
Monsanto Chemicals Ltd
Monsanto Chemical Co
Original Assignee
Monsanto Chemicals Ltd
Monsanto Chemical 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 Monsanto Chemicals Ltd, Monsanto Chemical Co filed Critical Monsanto Chemicals Ltd
Publication of GB654246A publication Critical patent/GB654246A/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
    • 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
    • B01J2/12—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating drums
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/54—Preparation of carboxylic acid anhydrides
    • C07C51/573—Separation; Purification; Stabilisation; Use of additives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

654,246. Making pellets from finely-divided solids. MONSANTO CHEMICAL CO. April 11, 1947, No. 9697. Convention date, July 19, 1943. [Class 87 (ii)] Pellets of phthalic anhydride, maleic anhydride, naphthalene, para dichlorobenzene, phenol, and other substances having a sharp crystallizing point, are continuously formed by initially supplying material 10 in a finelydivided form to a rotary drum 11, and continuously supplying additional material, in molten form, through a tube 17 into a region A, Fig. 2, of the material 10. The molten material is fed at such a rate as to maintain the material in the region A in a plastic state. This region is maintained at a temperature between the melting-point and about 30‹ C. below the melting point of the material. The drum is rotated at such a speed that the solid material moves up the rising side of the drum and falls over inwardly, thereby forming the region A, which has relatively restricted circulation. The temperature of the mass in addition to being controlled by adjusting the flow of the molten mass may be controlled by cooling the drum, e.g. by spraying it with water, or by separating some of the pellets formed, cooling them, and returning them to the drum. If small pellets are desired, the temperature is allowed to rise. The drum is preferably tilted a little, not more than 30 degrees, and by adjusting this angle, it is possible to selectively remove from the drum the larger pellets. The pellets are removed by a screw conveyer 20 to a barrel 19. Specification 654,272 is referred to.
GB9697/47A 1943-07-19 1947-04-11 Improvements in or relating to a method of forming pellets of phthalic anhydride andother substances having a sharp crystallising point Expired GB654246A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US654246XA 1943-07-19 1943-07-19

Publications (1)

Publication Number Publication Date
GB654246A true GB654246A (en) 1951-06-13

Family

ID=22062621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9697/47A Expired GB654246A (en) 1943-07-19 1947-04-11 Improvements in or relating to a method of forming pellets of phthalic anhydride andother substances having a sharp crystallising point

Country Status (1)

Country Link
GB (1) GB654246A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1270750A2 (en) * 2001-06-01 2003-01-02 Glatt Systemtechnik GmbH Pelletising apparatus for producing spherical bulk material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1270750A2 (en) * 2001-06-01 2003-01-02 Glatt Systemtechnik GmbH Pelletising apparatus for producing spherical bulk material
EP1270750A3 (en) * 2001-06-01 2004-03-10 Glatt Systemtechnik GmbH Pelletising apparatus for producing spherical bulk material

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