GB1305041A - - Google Patents

Info

Publication number
GB1305041A
GB1305041A GB6354969A GB6354969A GB1305041A GB 1305041 A GB1305041 A GB 1305041A GB 6354969 A GB6354969 A GB 6354969A GB 6354969 A GB6354969 A GB 6354969A GB 1305041 A GB1305041 A GB 1305041A
Authority
GB
United Kingdom
Prior art keywords
hexamethylenetetramine
particles
bed
aqueous solution
fluidized bed
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
GB6354969A
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 filed Critical
Publication of GB1305041A publication Critical patent/GB1305041A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
    • C07D487/12—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains three hetero rings
    • C07D487/18—Bridged systems
    • 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
    • B01J2/16—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1305041 Hexamethylene tetramine TENNECO CHEMICALS Inc 31 Dec 1969 [31 Dec 1968] 63549/69 Heading C2C Uniform free-flowing spheres of hexamethylenetetramine are prepared by: (a) continuously introducing into a reaction zone gaseous ammonia and an aqueous solution containing 30- 5% (by weight) of formaldehyde and having a low cation content in a molar ratio of approximately 0À67 to 1; (b) heating the mixture to a temperature in the range 50-90‹ C. at a pH of 7À0 to 8À0 for 1-10 minutes; (c) continuously withdrawing the aqueous solution of hexamethylene tetramine from the reaction zone; (d) passing air heated to a temperature below the decomposition temperature of hexamethylenetetramine up through a confined zone containing finely-divided particles of hexamethylenetetramine at a flow rate sufficient to form a fluidized bed; (e) spraying into the fluidized bed the aqueous solution of hexamethylenetetramine obtained in step (c) in an amount such that the water in the solution is vaporized and the solid particles are coated with the solution; (f) injecting into the fluidized bed by means of air, particles of hexamethylenetetramine of a size smaller than the average size of the particles present in the bed, the particles being injected downwardly and transversely to the heated air flow in the bed; (g) continuously discharging a portion of the hexamethylenetetramine pellets from the bed; and (h) screening the discharged pellets to obtain a uniform free-flowing product.
GB6354969A 1968-12-31 1969-12-31 Expired GB1305041A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78830868A 1968-12-31 1968-12-31

Publications (1)

Publication Number Publication Date
GB1305041A true GB1305041A (en) 1973-01-31

Family

ID=25144094

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6354969A Expired GB1305041A (en) 1968-12-31 1969-12-31

Country Status (6)

Country Link
BE (1) BE743974A (en)
DE (1) DE1965404A1 (en)
FR (1) FR2027492A1 (en)
GB (1) GB1305041A (en)
IT (1) IT968009B (en)
NL (1) NL6919558A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023123524A1 (en) * 2021-12-28 2023-07-06 山东天成万丰投资有限公司 Urotropine production device with automatic ph adjustment function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023123524A1 (en) * 2021-12-28 2023-07-06 山东天成万丰投资有限公司 Urotropine production device with automatic ph adjustment function

Also Published As

Publication number Publication date
IT968009B (en) 1974-03-20
DE1965404A1 (en) 1970-07-16
BE743974A (en) 1970-05-28
FR2027492A1 (en) 1970-09-25
NL6919558A (en) 1970-07-02

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees