DE1059753B - Water bath for pasteurization or sterilization of food or pharmaceuticals packaged watertight in glass or metal containers - Google Patents

Description

It is often necessary to thermally treat packaged goods in water baths. Be like that Canning containers, such as tin cans made of sheet metal, plastic containers, mason jars and the like., On more or less higher temperatures, e.g. B. for pasteurization, and / or sterilization brought.

Such thermal treatments in aqueous media can be carried out in open containers under normal pressure or in closed systems under overpressure for the purpose of overheating or in vacuum units for the purpose of gentle thermal treatment. They are particularly suitable for the production of sterile and condensed milk, the meat and fish canning industry, canned vegetables and fruit, diet and medicinal products and the like. Unpleasant accompanying circumstances always arise, which can only be eliminated afterwards with a considerable amount of cleaning agents and time. Due to the given water hardness, water scale occurs with appropriate thermal treatment, which covers both the container walls and the packaging of the sterilized or pasteurized goods. In addition, there is almost always an additional heavy soiling, be it through handling or leakage or bursting of the goods used. ]

It is already known (Otto Wille, "Der Fisch", Vol. III, 1949, p. 544), cans that are in the autoclave come, beforehand with the help of a special cleaning agent to wash and clean. It is also known according to German patent 617 585 To clean the empty equipment, for example of milk stone residues. This is done on an enzymatic basis Ways. Next is after the German patent specification 694 237 a means for removing beer and Milk stone, for example, recommended from pasteurizers, which consists of tartaric acid, and is still low Contains additives of other salts such as phosphoric acid.

Both in one case and in the other, the procedures do not give the possibility to Pasteurizing or sterilizing goods brought really perfectly from the pasteurizing or Bring out the sterilization system. Pre- or post-treatment are necessary in each case, in the case of pre-treatment does not exclude post-treatment of the items to be sterilized and in the case of post-treatment the pasteurization system only subsequently reverses a condition that has already occurred.

It has now been found that all previously necessary pre- and post-treatments are superfluous become, above all, the most time-consuming manual cleaning that is necessary in almost all cases before labeling, printing or painting the loading water bath

for pasteurization or sterilization
from in glass or metal vessels

packed waterproof
Food or pharmaceuticals

Applicant:

Joh. A. Benckiser G.m.b.H.,

Chemical factory,
Ludwigshafen / Rhein, Frankenthaler Str. 3

Dipl.-Chem. Dr. Heinz Wissemeier,

Ludwigshafen / Rhine,
has been named as the inventor

conditions when the water, regardless of whether it is distilled or more or less hard Water acts, orthophosphates are added, which to smaller parts also by condensed phosphates can be replaced.

In addition to the customary orthophosphates, such as sodium or ammonium phosphates, phosphoric acids which are linked to other inorganic and / or organic groups in the form of salts, such as, for. B. hydrazine, hydroxylamine, amines, guanidines, triethanolamines, etc. If other substances are present in the solution, the P ₂ O ₅ content of the additives, calculated on the dry matter, should be at least 10%. The choice of phosphates and any other additives is advantageous so that the aqueous solutions prepared with them are slightly acidic (pg about 6), neutral or slightly alkaline (p _H about 9).

B e i s ρ i el 1

A rotary autoclave filled with milk bottles for the production of sterile milk is filled with water having a total hardness of 10 °. Around 450 g of a mixture consisting of 63% disodium phosphate anhydrous and 37% amidosulfonic acid are added per m ^{3 of water.} The bottles coming out of the autoclave after the heat treatment are clean, the crown cork closures, which are provided with a layer of lacquer, are not attacked and bare. Without to-909 557/248

As a result, the bottles come out of the autoclave cloudy, dirty and with partially damaged closures. The _pH value of the treated water was 7.0. . ·

Example2

For the preservation of canned meat, pressure containers are used which are filled with water and brought to temperatures of 110 ° C. Without treatment, the canned food (tinplate cans) will come out cloudy and in some cases are heavily soiled with the contents. They can no longer be labeled properly and have to be treated afterwards. By adding a mixture consisting of 42% disodium phosphate, 20% trisodium phosphate, 6.75% tripolyphosphate, 6.75% soda and 24.5% sulfamic acid, in amounts of 150 g per m ^{3 of} water at 10 ° total hardness the cans leave the autoclave in a clean condition without tarnishing and can be easily and safely labeled.

Example 3

Canned vegetables are heated to 90 ° C in open water baths, remain there for 45 minutes and are then cooled. Without treatment, they show a strong build-up of deposits, which discolor the cans so much that they have to be re-treated. They remained bright when the autoclave ^{water per m 3} with a total hardness of 200 g of a mixture consisting of% disodium phosphate anhydrous, 30% amidosulphonic acid, 15% alkylarylsulphonate and 5% soda was added. The p _H was 7.8.

Claims (3)

Patent claims: Γ. Use of orthophosphate-containing aqueous solutions having a p _H of about 6 to 9, optionally in the presence of other substances / such as amidosulfonic acid, as A ¥ asserbad for pasteurizing or sterilizing in glass or metal containers waterproof packaged food or medicines. ~ " 2. Use of aqueous solutions according to claim 1, characterized in that a A smaller part of the orthophosphates contained in the solution is replaced by condensed phosphates is. '·' ■ "■ 3. Use of aqueous solutions according to claim 1 and 2, characterized by a further content of sulfamic acid and / or soda and / or alkylarylsulfonate. Considered publications:
German Patent Nos. 617 585, 694 237, 839; Otto Wille, "The Fish", Vol. Ill, p. 544, Paragraph 3, 1949.. , © 909 557/248 6.59