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

Similar Documents

Publication Publication Date Title
US2618547A (en) Manufacture of mixed fertilizers
GB962265A (en) Improvements in the granulating and drying of fluid materials such as aqueous solutions, pastes and slurries
IN168807B (en)
RU95106645A (en) METHOD FOR PRODUCING UREA GRANULES
BG99405A (en) Method for the preparation of granular urea
ES2000228A6 (en) High-strength, storage-linkage particulate urea and method for the production thereof.
US3738821A (en) Process of agglomerating ammonium sulfate and making complete fertilizer
US3477842A (en) Manufacture of free flowing fertilizer product by coating granules with urea-formaldehyde from an alkaline solution
US3307934A (en) Method of making a granulated peat fertilizer
GB1292925A (en) Urea formaldehyde condensation products
GB1484223A (en) Process for preparing medium density granular sodium tripolyphosphate
GB1305041A (en)
US3351455A (en) Ammonium sulfate-ammonium bisulfate fertilizer and method of making
US2061534A (en) Fertilizer in granular form
US2375898A (en) Process for the production of substantially anhydrous calcium nitrate
GB1314660A (en) Processes for the production of hexamethylenetetramine pellets
SE8204077D0 (en) A PROCESS FOR MAKING GRANULES CONTAINING UREA AS THE MAIN COMPONENT
ES406336A1 (en) Agglomerated rubber chemicals
US3644359A (en) Free-flowing cyanuric acids
ES393643A1 (en) Multi-level spray drying method
US3415638A (en) Process for preparing ammonium phosphate
GB1119702A (en) Fertilizers
ES271256A1 (en) Improvements in or relating to the preparation of physically united materials and chemical compounds in particulate form
FI80823B (en) GRANULAER MINERALFODERPRODUKT INNEHAOLLANDE MAGNESIUMOXID SOM HUVUDKONONONON.
SU990755A1 (en) Process for producing granulated potassium chloride

Legal Events

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