GB539477A - Improvements in and relating to the low temperature treatment for the preservation of perishable foods and other materials - Google Patents

Improvements in and relating to the low temperature treatment for the preservation of perishable foods and other materials

Info

Publication number
GB539477A
GB539477A GB61739A GB61739A GB539477A GB 539477 A GB539477 A GB 539477A GB 61739 A GB61739 A GB 61739A GB 61739 A GB61739 A GB 61739A GB 539477 A GB539477 A GB 539477A
Authority
GB
United Kingdom
Prior art keywords
pipes
chamber
vacuum
valve
header
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
GB61739A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB61739A priority Critical patent/GB539477A/en
Publication of GB539477A publication Critical patent/GB539477A/en
Expired legal-status Critical Current

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
    • A23L3/40—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by drying or kilning; Subsequent reconstitution
    • A23L3/44—Freeze-drying
    • 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
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/02—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation containing fruit or vegetable juices
    • A23L2/08—Concentrating or drying of juices
    • A23L2/12—Concentrating or drying of juices by freezing
    • 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
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/02—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation containing fruit or vegetable juices
    • A23L2/08—Concentrating or drying of juices
    • A23L2/12—Concentrating or drying of juices by freezing
    • A23L2/14—Concentrating or drying of juices by freezing and sublimation

Landscapes

  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)

Abstract

539,477. Freezing foods &c. KIDD, F. Jan. 7, 1939, Nos. 617 and 3181. [Class 29] Solid and liquid food substances such as meat, fish, fruit, fruit juices, milk &c. are dried for preservation by subjection to evaporation in a vacuum chamber 1 having means for maintaining a low temperature, and ice separated therefrom is evaporated without passing through the liquid phase by supplying heat through pipes 5 to the material while still under vacuum, the water vapour being condensed on cooling pipes 4. The chamber 1 has a sealed end door 2 and is connected through a valve 9 with a small chamber 10 connected through a valve 27 with the vacuum pump. The material is supported in heat conducting vessels on the pipes 5 which are initially supplied with a cold medium such as brine from a tank 20 through a header 36 and control valves 30. Water in the material evaporates and produces cold sufficiently to effect freezing, and the vapour is condensed on chilling surfaces in the chamber 10. The vacuum pump is shut off and the valve 9 closed while condensate is removed from the chamber 10. The supply of cold brine to the pipes 5 is cut off and warm brine from a tank 40 is circulated through the header 36 and pipes 5, and cooling medium is circulated from tank 20 through the pipes 4 to condense the vapour formed by the heating of pipes 5. The pipes 4 may be screened by polished heat reflecting baffles from the pipes 5. The heat may be derived from an immersion heater or steam circulated through header 36. Supplementary cooling medium may be supplied from a plant 44. The ice formed on pipes 4 is removed and drained away at valve 6 after the material has been removed from the chamber. Thermometers 12 and vacuum pressure gauges of the Pirani type may be fitted to facilitate control of the process. The material may be placed in storage cans during the drying process, the cans afterwards being vacuum sealed or charged with inert gas and sealed. Where liquids are treated they are frozen by a vacuum spray process and the solidified material subsequently treated in the chamber 1 as above described.
GB61739A 1939-01-07 1939-01-07 Improvements in and relating to the low temperature treatment for the preservation of perishable foods and other materials Expired GB539477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB61739A GB539477A (en) 1939-01-07 1939-01-07 Improvements in and relating to the low temperature treatment for the preservation of perishable foods and other materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB61739A GB539477A (en) 1939-01-07 1939-01-07 Improvements in and relating to the low temperature treatment for the preservation of perishable foods and other materials

Publications (1)

Publication Number Publication Date
GB539477A true GB539477A (en) 1941-09-12

Family

ID=9707505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB61739A Expired GB539477A (en) 1939-01-07 1939-01-07 Improvements in and relating to the low temperature treatment for the preservation of perishable foods and other materials

Country Status (1)

Country Link
GB (1) GB539477A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471035A (en) * 1943-10-02 1949-05-24 Frank E Hurd Apparatus for the desiccation of organic substances
US2917389A (en) * 1958-08-11 1959-12-15 Gen Foods Corp Coconut products and technique for producing the same
US2917745A (en) * 1958-08-08 1959-12-15 Gen Foods Corp Coconut treating process and product
US2917746A (en) * 1958-12-04 1959-12-15 Gen Foods Corp Coconut products and technique for producing the same
DE1753586B1 (en) * 1963-10-07 1970-11-19 Merck & Co Inc Process for freeze-drying and preservation of moisture-sensitive goods
US4331690A (en) 1972-01-14 1982-05-25 Tweedy Of Burnley Limited Treatment of foodstuffs

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471035A (en) * 1943-10-02 1949-05-24 Frank E Hurd Apparatus for the desiccation of organic substances
US2917745A (en) * 1958-08-08 1959-12-15 Gen Foods Corp Coconut treating process and product
US2917389A (en) * 1958-08-11 1959-12-15 Gen Foods Corp Coconut products and technique for producing the same
US2917746A (en) * 1958-12-04 1959-12-15 Gen Foods Corp Coconut products and technique for producing the same
DE1753586B1 (en) * 1963-10-07 1970-11-19 Merck & Co Inc Process for freeze-drying and preservation of moisture-sensitive goods
US4331690A (en) 1972-01-14 1982-05-25 Tweedy Of Burnley Limited Treatment of foodstuffs

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