Controlled atmosphere storage method
US4142372A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1977 |
| Grant date | Mar 6, 1979 |
| Priority date | — |
| Expiry date | Oct 19, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA23B7/148
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
In a vegetables and fruits-storing method of conventional controlled atmosphere storage including continuously feeding the air of a definite oxygen content such as, for example, 2 - 3% by volume and definite amount obtain by means of an adsorber into a refrigerator to obtain an atmosphere suitable for storage of the vegetables and fruits, an improved method wherein the improvement comprises in the first step feeding the open air and the atmosphere of the refrigerator to be recycled in such order or simultaneously into the adsorber packed with an adsorbent such as zeolite or the like which adsorbs more nitrogen than oxygen, adsorbing the nitrogen in the open air and the atmosphere and expelling the high oxygen content air of the adsorber having oxygen content lower than that of the open air but higher than that of desired atmosphere of the refrigerator, in the next step expelling a part of the remained high oxygen content air, and in the further next step, desorbing the nitrogen and the remained high oxygen content air of the adsorber to obtain the desired oxygen content air of, for example, 2 - 3% by volume and feeding the desired oxygen content air into the refrigerator, and repea…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.