[go: up one dir, main page]

Shirley Jr et al., 1982 - Google Patents

Melt granulation of urea by the falling-curtain process

Shirley Jr et al., 1982

Document ID
18063775611250187034
Author
Shirley Jr A
Nunnelly L
Carney Jr F
Publication year
Publication venue
Industrial & Engineering Chemistry Product Research and Development

External Links

Snippet

In this process, molten urea is sprayed onto cascading granules in a rotary drum to build seed granules toproduct size. Heat released by solidifying melt is removed primarily by evaporation of a fine mist of water sprayed into air passed through the granulation drum …
Continue reading at pubs.acs.org (other versions)

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with materials not having a specially fertilising activity
    • C05G3/0005—Further uses of fertiliser, also the form in which it is presented, e.g. by englobed granules
    • C05G3/0011—Further uses of fertiliser, also the form in which it is presented, e.g. by englobed granules by covering; apparatus for covering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, 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
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C1/00—Ammonium nitrate fertilisers
    • C05C1/02—Granulation; Pelletisation; Stabilisation; Colouring
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with materials not having a specially fertilising activity
    • C05G3/0005—Further uses of fertiliser, also the form in which it is presented, e.g. by englobed granules
    • C05G3/0058—Granulation of fertiliser compounds, so far as it is not covered by another class of fertilisers
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C05C9/005—Post-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, 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

Similar Documents

Publication Publication Date Title
US4842790A (en) Method and apparatus for producing high-strength grannular particulates from low-strength prills
EP0141437B1 (en) Process for the preparation of granules
EP0141436B1 (en) Process for the preparation of granules
US20240042480A1 (en) Fluid Bed Granulation Process and Apparatus
US4353709A (en) Granulation process
CN102596383B (en) Method for producing pellets
US4190622A (en) Process for prilling urea
US4686115A (en) Process for granulating chemical products and apparatus therefor
NO160956B (en) SYNKRON SUPPRESSION SCRAMBLING OF TELEVISION SIGNALS FOR SUBSCRIPTION TV AND PROGRESS MEASURES BY SYNKRON SUPPRESSION SCRAMBLER SUBSCRIPTION TV SYSTEM.
WO1994003267A1 (en) Process for the production of urea granules
US4024210A (en) Sulfur pelletizing
US3398191A (en) Process for the production of granular nitrogenous compounds
CA1154213A (en) Sulfur prilling
US6022386A (en) Process for producing porous ammonium nitrate and ammonium nitrates produced
Shirley Jr et al. Melt granulation of urea by the falling-curtain process
US3117020A (en) Process for the spherical granulation of water-soluble nitrogenous material
JPS5934419B2 (en) Method for producing urea prills and urea prills obtained by applying this method
EP0278246B1 (en) Production of granular bisphenols
CN107381599A (en) A kind of bulky grain ammonium nitrate products and preparation method thereof
IE862024L (en) Granulating devide and plant.
US3232703A (en) Process for the production of ammonium nitrate
US3475195A (en) Process and apparatus for granulating paste
CN106810321B (en) Equipment and method for producing sulfur-containing phosphate fertilizer by adding liquid sulfur into gas phase
CN107602159B (en) Preparation device and method of ammoniated water-soluble granular compound fertilizer
EP4444457B1 (en) Fluidized bed granulation