Process for vacuum freeze drying of roses

Abstract

The invention discloses a process for vacuum freeze drying of roses. The process comprises the following steps of S1, picking and treating the roses; S2, treating the roses with a color-retaining solution; S3, freeze-drying the roses; S4, drying the roses by gradient heating; and S5, performing low-temperature condensation and collection on rose hydrolat. The process for vacuum freeze drying of the roses has the beneficial effects that the color-retaining solution is utilized and atomized, so that collection and utilization of the roses are realized; the stability of petal cells is kept by utilizing simmondsia chinensi oil, tartaric acid and apricot kernel oil, and meanwhile, the oxidation resistance of the simmondsia chinensi oil, tartaric acid and apricot kernel oil is combined and superposed to stabilize the overall color of petals, so that sufficient drying is realized; collection and utilization are realized by utilizing three-stage heating; collection and utilization are achievedby limiting low-temperature condensation and collection conditions; sufficient drying is realized by atomizing the color-retaining solution; and sufficient drying is achieved by standing for 35 min.

Description

technical field [0001] The invention relates to the field of food processing, in particular to a process for vacuum freeze-drying roses. Background technique [0002] Rose, belonging to the order Rosaceae, is a deciduous shrub of the family Rosaceae, with many needles on the branches, odd-numbered pinnate compound leaves, 5-9 leaflets, oval, with side thorns, and its flowers are mainly used for food and extraction of rose oil and rose oil. Used in cosmetics, food, fine chemical and other industries. "Materia Medica Text" said: "Rose, clear but not turbid, harmonious but not violent, softening the liver and refreshing the stomach, dispersing qi and activating blood, clearing and suffocating stagnation without any disadvantages of pungent, warm, rigid and dry. The most effective and the most tame, there are almost no other aromatic products.” Roses contain more than 300 kinds of chemical components, such as aromatic alcohols, aldehydes, fatty acids, phenols and essence-contai...

AI Technical Summary

Problems solved by technology

Although the method of vacuum drying is used to minimize the damage to the active ingredients of roses, the appearance is well preserved, and the nutrients and active substances of roses are maintained, but in fact, the temperature in the heating stage is not enough to completely dry roses. During the transportation stage, it is very easy to cause the roses to return to normal temperature and soften, and then be damaged; at the same time, if the roses are warmed up by direct heating, the rose aroma that escapes during the warming up stage cannot be effectively collected and utilized.

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