Shanhong Chemical Co,Ltd-China tartaric acid supplier, manufacturer

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Chirality and Plane-Polarized Light

        In 1815, Jean Baptiste Biot discovered that plane-polarized light passing through some organic compounds could be rotated either clockwise or counterclockwise. Years later in 1849, Louis Pasteur put this information to good use, when he separated sodium ammonium tartrate crystals according to geometrical shape.
        When the grape wine in the total acid content of greater than 7.5g / L, you need to drop acid treatment; when grape wine in the total acid content of less than 5g / L on the need for additional acid treatment. Grape wine down by acid and acid treatment, should be transferred in the original wine after the winter storage of natural frozen before processing.
        Acid treatment can reduce the physical withdrawal method for freezing and promote tartrate precipitation. When the physical methods fail to reduce acid requirements, the need for chemical deacidification. That grape wine by adding weak alkali salts, and in which excess organic acids, thereby reducing the acidity. The most commonly used acid-lowering agents are calcium carbonate, potassium bicarbonate and potassium tartrate, calcium carbonate of which the most effective and cheapest. 1g / L of calcium carbonate, can reduce the total acid 1g / L (with sulfuric acid), can reduce the total acid 1.5g / L (by tartaric).
        If you need additional sour grape wine, preferably by adding tartaric acid. Because the total amount of citric acid in wine shall not exceed 1gl, so by using citric acid has many limitations, and the decomposition of lactic acid bacteria susceptible to bacterial diseases. Citric acid is usually added by the amount of generally not more than 0.5g / L.