NL6814641A - Deep-freezing liq. or semi-liq. suspensions or extracts of foodstuffs - Google Patents

Deep-freezing liq. or semi-liq. suspensions or extracts of foodstuffs

Info

Publication number
NL6814641A
NL6814641A NL6814641A NL6814641A NL6814641A NL 6814641 A NL6814641 A NL 6814641A NL 6814641 A NL6814641 A NL 6814641A NL 6814641 A NL6814641 A NL 6814641A NL 6814641 A NL6814641 A NL 6814641A
Authority
NL
Netherlands
Prior art keywords
suspension
freezing
liquid nitrogen
droplets
drops
Prior art date
Application number
NL6814641A
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
Priority to NL6814641A priority Critical patent/NL6814641A/en
Publication of NL6814641A publication Critical patent/NL6814641A/en

Links

Classifications

    • 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
    • A23L3/36—Freezing; Subsequent thawing; Cooling
    • A23L3/37—Freezing; Subsequent thawing; Cooling with addition of or treatment with chemicals
    • A23L3/375—Freezing; Subsequent thawing; Cooling with addition of or treatment with chemicals with direct contact between the food and the chemical, e.g. liquid nitrogen, at cryogenic temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C1/00—Producing ice

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Storage Of Fruits Or Vegetables (AREA)

Abstract

Deep freezing liquid or semi-liquid suspensions or extracts of foodstuffs.. Such as apple pure, and particularly spinach etc., by bringing droplets of the suspension in the immediate vicinity of or into direct contact with drops of liquid nitrogen freely suspended in a gaseous atmosphere. The process can be carried out in a vertical cylindrical vessel through which the droplets of foodstuff suspension, preferably an aqueous suspension at 5 degrees C, and of liquid nitrogen may pass co-currently in such a way that the liquid nitrogen drops form a concentric curtain round the drops of suspension, or may be injected in counter-current flow. An auxiliary stream of gas is directed along the walls of the freezing vessel to prevent freezing of the suspension thereon and to assist in keeping the droplets in suspension for a longer period. The frozen product is a free flowing powder which can be removed, e.g. via a star-valve, and packed by standard machines. Higher production rates of better quality material are obtained because of the high freezing rate and difficulties associated with pre-packing before freezing are eliminated. The cost reduction is sufficient to justify the use of liquid nitrogen.
NL6814641A 1968-10-14 1968-10-14 Deep-freezing liq. or semi-liq. suspensions or extracts of foodstuffs NL6814641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL6814641A NL6814641A (en) 1968-10-14 1968-10-14 Deep-freezing liq. or semi-liq. suspensions or extracts of foodstuffs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6814641A NL6814641A (en) 1968-10-14 1968-10-14 Deep-freezing liq. or semi-liq. suspensions or extracts of foodstuffs

Publications (1)

Publication Number Publication Date
NL6814641A true NL6814641A (en) 1970-04-16

Family

ID=19804916

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6814641A NL6814641A (en) 1968-10-14 1968-10-14 Deep-freezing liq. or semi-liq. suspensions or extracts of foodstuffs

Country Status (1)

Country Link
NL (1) NL6814641A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0478118A1 (en) * 1990-08-31 1992-04-01 Taiyo Sanso Co., Ltd. Apparatus for producing frozen particles
EP0621453A1 (en) * 1993-04-20 1994-10-26 E.I. Du Pont De Nemours And Company Method and apparatus for producing frozen particles using an entrapment zone of atomized cryogenic liquid droplets

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0478118A1 (en) * 1990-08-31 1992-04-01 Taiyo Sanso Co., Ltd. Apparatus for producing frozen particles
EP0621453A1 (en) * 1993-04-20 1994-10-26 E.I. Du Pont De Nemours And Company Method and apparatus for producing frozen particles using an entrapment zone of atomized cryogenic liquid droplets
EP0871001A3 (en) * 1993-04-20 2000-01-05 Dade Chemistry Systems Inc. Method and apparatus for producing frozen particles using an entrapment zone of atomized cryogenic liquid droplets

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