EP1091799A1 - A method for formulating particles - Google Patents

A method for formulating particles

Info

Publication number
EP1091799A1
EP1091799A1 EP99925481A EP99925481A EP1091799A1 EP 1091799 A1 EP1091799 A1 EP 1091799A1 EP 99925481 A EP99925481 A EP 99925481A EP 99925481 A EP99925481 A EP 99925481A EP 1091799 A1 EP1091799 A1 EP 1091799A1
Authority
EP
European Patent Office
Prior art keywords
particles
solution
inert
formulating
medium
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.)
Withdrawn
Application number
EP99925481A
Other languages
German (de)
French (fr)
Inventor
Ola Jonassen
Ingvald Str Mmen
Per Arne Schieflo
Odilio Alves-Filho
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.)
Dtech AS
Original Assignee
Leiv Eiriksson Nyfotek AS
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 Leiv Eiriksson Nyfotek AS filed Critical Leiv Eiriksson Nyfotek AS
Publication of EP1091799A1 publication Critical patent/EP1091799A1/en
Withdrawn legal-status Critical Current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
    • B01J2/003—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic followed by coating of the granules
    • 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

Definitions

  • the present invention is related to a method for formulating particles from solutions for processing in a fluid bed.
  • the method according to the invention may be utilized to produce frozen fluidable particles of solutions thereby using an inert medium in such a way that the solutions may be dried in a fluidized drying chamber.
  • the inert medium as such is disappearing by supplication during drying or already during the formulation of the particles.
  • the method also may be utilized for particle formation if the need for further processing is not drying, but may be performed in a fluid bed.
  • the solution to be dried is cooled down to the initial freezing point. Thereafter the solution is mixed with the inert medium under pressure, thereafter to be expanded to compact, frozen particles comprising the inert medium as well as the solution in a frozen state.
  • the fluidable particles may be produced from the inert medium which thereafter is covered by the solution.
  • the particles normally are produced in a size of 0,5 to 5 mm.
  • the inert medium to be sublimized during drying or expansion can be for example be N 2 , C0 2 or such.
  • Equipment necessary for forming the method may be constructed for batch or continuous operation whether two components are mixed in a pressurised container.
  • the pressurised container should have valve for expansion of the mixture to particle shape. This is performed in a cold room in such a way that the particles do not melt.
  • the mixing relation as well as the pressure in the container and thereby also the temperature of the expanded particles, are adjusted in such a way that the desired density is achieved for the particles.
  • the desired density is desired partly based on the fluidising properties of the particles in the following drying chambers and the defined claims for the dried end product.
  • the clean inert particles initially are produced in an equipment corresponding with the equipment described above, or in another way, for example by granulation.
  • the particles are covered with the solution which already is undercooled to the initial freezing point.
  • the thickness and the initial temperature of the layer for the clean inert particles have to be adjusted to ensure that melting is avoided.
  • Addition of the layer may be performed in an ordinary industrial equipment for this purpose in a batch or continuous production process.
  • the equipment is arranged in a cold room.
  • the following drying is performed in a normal fluidized drying chamber having a lower temperature than the lowest melting temperature of the particles.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Drying Of Solid Materials (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

Method for formulating particles from solutions, wherein cooling the solution down to the initial freezing point, to mix the solution under pressure with an inert medium, to expand the solution to solid, fluidable frozen particles comprising the insert medium and the solution in a frozen shape.

Description

A method for formulating particles
5 The present invention is related to a method for formulating particles from solutions for processing in a fluid bed.
For drying known methods are utilizing among others mixture of solutions where the dried end product is mixed with 0 a return flow with the product. Such a method, however, includes very different resting times for the product which is recirculated in relation to products not being recirculated. Additionally the flow of products substantially is increased through the drying chamber. s The solution is spread out or in other way laid on inert particles having a layer which thereafter is dried. The layer is peeled in the drying chamber thereafter to be taken out as dried powder in a cyclon, or the particles are taken out of the chamber for peeling. Such a method easily pollutes the dried o product from the inert particles. Furthermore, the inert particles which substantially do not pollute, are relatively heavy particles needing very large amounts of energy supplied to the fans to maintain the particles in fluidized condition.
With the method according to the present invention 5 substantial advantages are achieved in relation to known methods, whereby the advantages with the known method substantially are maintained and the disadvantages avoided. In this way a strongly reduced recilient time is achieved, strongly reduced flow of products through the dryer, no o pollution of the product from the inert particles, reduced claim for energy for the fans and furthermore also a possibility to control the density and porousity of the end product .
The above mentioned advantages are achieved with the 5 method according to the invention as defined with features stated in the claims.
The method according to the invention may be utilized to produce frozen fluidable particles of solutions thereby using an inert medium in such a way that the solutions may be dried in a fluidized drying chamber. The inert medium as such is disappearing by supplication during drying or already during the formulation of the particles. The method also may be utilized for particle formation if the need for further processing is not drying, but may be performed in a fluid bed. According to the invention the solution to be dried, is cooled down to the initial freezing point. Thereafter the solution is mixed with the inert medium under pressure, thereafter to be expanded to compact, frozen particles comprising the inert medium as well as the solution in a frozen state. Alternatively, the fluidable particles may be produced from the inert medium which thereafter is covered by the solution. This certainly must be made in such a way that the particles as such do not melt. The particles normally are produced in a size of 0,5 to 5 mm. The inert medium to be sublimized during drying or expansion, can be for example be N2, C02 or such.
Equipment necessary for forming the method may be constructed for batch or continuous operation whether two components are mixed in a pressurised container. The pressurised container should have valve for expansion of the mixture to particle shape. This is performed in a cold room in such a way that the particles do not melt.
The mixing relation as well as the pressure in the container and thereby also the temperature of the expanded particles, are adjusted in such a way that the desired density is achieved for the particles. The desired density is desired partly based on the fluidising properties of the particles in the following drying chambers and the defined claims for the dried end product.
By production of inert particles to be covered with the solution, the clean inert particles initially are produced in an equipment corresponding with the equipment described above, or in another way, for example by granulation. The particles are covered with the solution which already is undercooled to the initial freezing point. The thickness and the initial temperature of the layer for the clean inert particles have to be adjusted to ensure that melting is avoided. Addition of the layer may be performed in an ordinary industrial equipment for this purpose in a batch or continuous production process. Preferably the equipment is arranged in a cold room. The following drying is performed in a normal fluidized drying chamber having a lower temperature than the lowest melting temperature of the particles.
By drying the particle formulation in a closed circuit having low temperature, substantial quality advantages are achieved in relation to known drying processes, especially because volatile components such as aromatic components are preserved.

Claims

P a t e n t C l a i m s
1. Method for formulating particles from solutions, CHARACTERIZED IN cooling the solution down to the initial 0 freezing point, to mix the solution under pressure with an inert medium, to expand the solution to solid, fluidable frozen particles comprising the inert medium and the solution in a frozen shape.
2. Method by formulating particles from solutions, s CHARACTERIZED IN producing fluidable particles of the inert medium and to cover the particles with the solution.
3. Method according to claim 2, CHARACTERIZED IN covering the particles with the solution in such a way that particles do not melt. o 4. Method according to preceding claims,
CHARACTERIZED IN to manufacture particles in a range of 0,5 to 5 mm.
5. Method according to preceding claims, CHARACTERIZED IN to use for example N2, C02 or such as inert 5 medium, which will sublimes during drying or by expansion.
0
EP99925481A 1998-06-02 1999-06-01 A method for formulating particles Withdrawn EP1091799A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO982501 1998-06-02
NO19982501A NO311164B1 (en) 1998-06-02 1998-06-02 Process for freeze-drying of solutions
PCT/NO1999/000172 WO1999065600A1 (en) 1998-06-02 1999-06-01 A method for formulating particles

Publications (1)

Publication Number Publication Date
EP1091799A1 true EP1091799A1 (en) 2001-04-18

Family

ID=19902098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99925481A Withdrawn EP1091799A1 (en) 1998-06-02 1999-06-01 A method for formulating particles

Country Status (6)

Country Link
EP (1) EP1091799A1 (en)
JP (1) JP2002518155A (en)
AU (1) AU4174699A (en)
CA (1) CA2333995C (en)
NO (1) NO311164B1 (en)
WO (1) WO1999065600A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0305133D0 (en) * 2003-03-06 2003-04-09 Sinvent As Product

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7512179L (en) * 1974-11-07 1976-05-10 Jacques Guiller PROCEDURE FOR TRANSFORMING A MASS IN LIQUID FORM TO KULOR GRANULES OR OTHER SMALLER BODIES IN FROZEN FORM, AND DEVICE FOR EXTENSION OF THE PROCEDURE
DE2659546A1 (en) * 1976-12-30 1978-07-13 Boehringer Mannheim Gmbh METHOD FOR PRODUCING FROZEN GRANULES
FR2396248A1 (en) * 1977-06-30 1979-01-26 Guiller Jacques Cryogenic immersion freezing plant partic. for food prods. - recycles liq. carbon di:oxide by recompressing exhaust gas
JPH089582Y2 (en) * 1990-08-31 1996-03-21 大陽酸素株式会社 Frozen grain production equipment
RU2023319C1 (en) * 1991-05-05 1994-11-15 Московская государственная академия химического машиностроения Process of manufacture of finely divided powder materials
ATE165438T1 (en) * 1994-02-09 1998-05-15 Kinerton Ltd METHOD FOR DRYING A MATERIAL FROM A SOLUTION
SE509920C2 (en) * 1994-12-23 1999-03-22 Bjoern Sivik Method and apparatus for continuous cooling of a pumpable emulsion or suspension
FR2756196A1 (en) * 1996-11-25 1998-05-29 Air Liquide Granule preparation process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9965600A1 *

Also Published As

Publication number Publication date
NO311164B1 (en) 2001-10-22
NO982501D0 (en) 1998-06-02
NO982501L (en) 1999-12-03
CA2333995C (en) 2009-01-13
CA2333995A1 (en) 1999-12-23
JP2002518155A (en) 2002-06-25
AU4174699A (en) 2000-01-05
WO1999065600A1 (en) 1999-12-23

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