Classifications

• • A—HUMAN NECESSITIES
  • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
  • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
  • A23C1/00—Concentration, evaporation or drying
  • A23C1/04—Concentration, evaporation or drying by spraying into a gas stream
  • A23C1/05—Concentration, evaporation or drying by spraying into a gas stream combined with agglomeration granulation or coating
• • A—HUMAN NECESSITIES
  • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
  • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
  • A23C1/00—Concentration, evaporation or drying
• • A—HUMAN NECESSITIES
  • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
  • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
  • A23C1/00—Concentration, evaporation or drying
  • A23C1/04—Concentration, evaporation or drying by spraying into a gas stream
• • A—HUMAN NECESSITIES
  • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
  • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
  • A23C9/00—Milk preparations; Milk powder or milk powder preparations
  • A23C9/16—Agglomerating or granulating milk powder; Making instant milk powder; Products obtained thereby
• • A—HUMAN NECESSITIES
  • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
  • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
  • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
  • A23L3/40—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by drying or kilning; Subsequent reconstitution
  • A23L3/46—Spray-drying

Definitions

• ABSTRACT OF THE DISCLOSURE Production of a milk-product concentrate containing more than 45% dry solids, at a temperature greater than 45 C., by spray-drying said product to obtain a powder having a water content within the range of 4.5 to 7%, an followed by subjecting the resulting powder to a different secondary drying treatment so as to reduce its water content to approximately 3.5%.
• This invention is directed to a process for the production of milk-product powders and also comprises, by way of novel industiral products, the powders which are obtained by means of said process.
• the invention is applicable especially, although not exclusively, to the production of powders of skimmed milk and the numerical values indicated in the following description relate to this particular product.
• powders in which the lactose has crystallized do not lend themselves to a subsequent instantaneization treatment as readily as normal spray-dried powders, in particular when it is desired to obtain a powder in the form of granules.
• the process according to the present invention has for its object to elimniate the various drawbacks which have just been outlined by making it possible to obtain milkproduct powders which have in particular the following combination of properties:
• the process in accordance with the in vention consists in principle in subjecting to a spraydrying process a concentrate containing a proportion of dry material which is higher than 45 and preferably between 50 and and having a temperature which is higher than 45 C. and preferably in the vicinity of to (3., by effecting the drying in the spray-drier until a powder is obtained having a water content within the range of 4.5 to 7% and preferably between 4.5 and 6%, .and in then subjecting the powder thus obtained to a secondary drying operation so as to reduce its water content to approximately 3.5%.
• the spraydrying stage will preferably be eifected in a drying tower fitted with a spraying device consisting either of pressure nozzles or compressed-air nozzles. Good results can someture of the drying air in the spray-drier), While at the times also be obtained by making use of a spray device same time retaining the other characteristic features of with centrifugal disc.
• the invention temperature of injection of the concentrate The secondary drying of the powder produced in the higher than 45 C.
• spray-drier is preferably carried out immediately after 5 65 C., water content of the powder at the outlet of the separation of the powder from the drying air, and can drying chamber within the range of 4.5 to 7%, and secbe carried out by any suitable means, for example in a ondary drying of the powder).
• compressed-air system which is supplied with hot air or that, among the known means for increasing the density on a drying table.
• the powder which has been subjected to the 10 ing concentrate constitutes the most advantageous factor secondary drying process can be subjected if necessary to in the practical application of the invention since it addia bolting operation or to the action of a cyclone selector tionally results in a substantial reduction in the quantity for the purpose of separating the finest particles from the of water which is evaporated in the spray-drier and conseid powder. quently a very considerable economy in total consumption In all cases also, the powder which has been subjected of steam which is necessary for the entire process. to the secondary drying treatment can undergo a cooling Whatlclaim is: process, 1.
• the comparative table given below indicates b way of comprising the steps of providing a starting milk-product nonlimitative example the results obtained in the producconcentrate containing a proportion of dry material which tion of a skimmed milk powder, on the one hand by is greater than 45% and having a temperature which is means of a conventional spray-drying process and, on the greater than 45 C., subjecting the starting milk-product other hand, by means of the process according to the inconcentrate to a spray-drying process by effecting the vention by making use in both cases of different types drying with drying air in the spray-drier until a powder of spraying devices. is obtained having a water content within the range of NORMAL TREATMENT WITHOUT REMOISTENING OF THE POWDER Pressure spraying nozzles Compressedair spraying Centrifugal disc nozzles Conventional Treatment Conventional Treatment Conventional Treat ment;
• the starting milk-product case also necessary to increase the moisture content of the concentrate contains from 50 to 55% dry solids and is at powder at the outlet of the spray-drier to approximately a temperature within the range of to C. when it is 66.5%. r fed into the spray drier, and wherein the powder obtained Furthermore, as has been mentioned earlier, all the nufrom the spray-drying process has a water content within merical values which have been specified in the foregoing the range of 4.5 to 6%. have been given in the case of skimmed milk. However, it 3.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Polymers & Plastics (AREA)
• Health & Medical Sciences (AREA)
• Nutrition Science (AREA)
• Dairy Products (AREA)
• Freezing, Cooling And Drying Of Foods (AREA)
• Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=8823718

Family Applications (1)

Country Status (9)

Cited By (3)

Families Citing this family (3)

Citations (4)

• 1964
  • 1964-02-21 FR FR964641A patent/FR1401226A/fr not_active Expired
• 1965
  • 1965-02-11 BE BE659565D patent/BE659565A/xx not_active IP Right Cessation
  • 1965-02-15 LU LU47990A patent/LU47990A1/xx unknown
  • 1965-02-17 ES ES0309448A patent/ES309448A1/es not_active Expired
  • 1965-02-18 GB GB7127/65A patent/GB1044501A/en not_active Expired
  • 1965-02-18 NL NL6502049A patent/NL6502049A/xx unknown
  • 1965-02-19 CH CH228865A patent/CH437991A/fr unknown
  • 1965-02-20 DE DE19651492780 patent/DE1492780A1/de active Pending
  • 1965-02-23 US US434617A patent/US3410701A/en not_active Expired - Lifetime

Patent Citations (4)

Also Published As

Similar Documents