Flavors and Fragrances Dl-citronellol Powder

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Dl-citronellol Powder Usage and Synthesis.

Citronellol is the most commonly used fragrance, most suitable for rose, but also for citrus flavours and many citronellol esters, and can be used in the manufacture of hydroxydihydrocitronellol and, in turn, hydroxydihydrocitronellal. Citronellol is an indispensable raw material for the formulation of all kinds of rose-based floral flavours and can be used in almost all cosmetic products.

Uses of Dl-citronellol.

It can be used to extract the production of geraniol or citronella aldehyde, also used as insecticide, mosquito repellent and soap flavour; widely used in the formulation of perfume flavour, soap and cosmetic flavours, etc.; is the base of rose-type flavour aroma, is also commonly used to sweeten the floral aroma, such as in the lily of the valley, lilac, osmanthus and other types of incense.

It is the spice for blending various heavy and floral fragrances, and is often used to form rose base by blending with geranium oil, geranium alcohol, and phenyl ethanol. It can also be used in rose, strawberry, hanging fruit and other berries, citrus fresh fruit, peach and other edible flavours.

Characteristic of Dl-citronellol.

Colourless oily liquid, with a special aroma of fresh roses and a bitter taste. There are d-, dl- and l-three natural products, l-citronellol that rose alcohol (rhodinol; see the article), generally known as citronellol, refers to d-citronellol.

Boiling point 225℃, flash point 102℃. Soluble in ethanol and most non-volatile oils and propylene glycol, insoluble in glycerol, insoluble in water.

Natural citronellol (d-type) exists in more than 70 kinds of essential oils such as lemongrass oil and leaf oil.

Product Method of Bulk Dl-citronellol Powder.

Obtained by reducing citronella aldehyde. In anhydrous ethanol, add metal aluminium chips and aluminium amalgam, heating, once the aluminium is dissolved, the mixture of citronella aldehyde and anhydrous butanol under stirring slowly added, heated at 50 ~ 80 ℃ for 3 ~ 6h, cooling, diluted with water to separate out the alcohol layer, and then distilled to butanol by vacuum distillation, that is, citronellol.

In the ether, benzene or other organic solvents, in the conditions of constant access to hydrogen, with sodium metal reduction of citronellol and obtained.

In the ethanol solution by adding the catalyst ferrous sulfate, in the platinum black catalysed hydrogenation of citral and get geraniol, and then by the above method to get citronellol.

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