Patent GB-409018-A (GB)
Title: Manufacture of materials containing ethanol
IPC: C12H1/14
Filed: 1932-07-15
Abstract: The preparation of esters of carbohydrates of the general formula n(C6H10O5) such as cellulose, starch, soluble starch, dextrin, inulin, a vegetable gum, tragacanth, lichenin, hemicelluloses, amyloid, glycogen, or agar-agar intended for addition to alcoholic beverages is described.  The ester may be a simple or mixed ester, for example, a cellulose acetate or starch acetate, or a suitable mixed ester of cellulose or starch, for example, an ester including an acyl radical and a radical of a mono- or dibasic acid containing a hydroxyl group. An example describes the preparation of an acetate of cellulose or starch or dextrin in the presence of pyridine sulphate. Instead of pyridine sulphate, quinoline sulphate or a homologue thereof may be employed.  Cellulose hydrate, hydrocellulose or oxycellulose may be substituted for cellulose as a starting material. Esters of the other carbohydrates specified above may be prepared by analogous methods.  If any of these esters do not give clear solutions, they may be purified by dissolving in aqueous ethanol, filtering, evaporating the filtrate to dryness, or precipitating it with a suitable agent such as an alcohol-ether mixture or the like. The viscosity of any of these cellulose esters may be reduced by known methods.  Specifications 6035/13, [Class 2 (ii)], and 3370/14, [Class 2 (iii)], are referred to.ALSO:Alcoholic beverages of reduced or no inebriating effect contain in solution at least one ester of a carbohydrate of the type n (C6H10O5).  Esters of cellulose, starch, soluble starch, dextrin, inulin, a vegetable gum, tragacanth, lichenin, hemicelluloses, amyloid, glycogen, and agar-agar are specified.  The ester may be a simple or mixed ester, for example, a cellulose acetate or starch acetate, or a suitable mixed ester of cellulose or starch, for example, an ester including an acyl radical and a radical of a mono- or dibasic acid containing a hydroxyl group. The esters may be incorporated with the beverage at any stage of its preparation or into the finished beverage, in which they are either soluble or at least partially soluble.  Thus the esters may be added to at least one of the ingredients used in the preparation of the beverage, or into the parent material of the beverage, for example, beer or sparkling wines, before or during fermentation, or to the mineral water of any kind such as soda water intended for admixture with the otherwise finished beverage.  Beverages specifically mentioned are brandy, whisky, gin, absinth, kirchwasser, wodka, starka, wines, liqueurs, aperitifs, bitters, champagne, cider, perry, beer, cocktails, and cobblers.  The beverages may contain sweetening substances, flavouring, aromatic essences or oils, colouring matters and fruit juices or syrups.  The proportion of carbohydrate ester in the finished beverage is usually 10 to 25 per cent by weight, but may be higher or lower in certain cases.  According to an example, a cellulose acetate or a starch acetate or a dextrin acetate or a mixed cellulose acetate or an ester of cellulose or starch or dextrin containing more than two dissimilar-esterifying groups, such as an ester containing an acetate, lactate, and pyruvate radical, which ester is soluble in water and aqueous ethanol is dissolved in any liquor prepared by fermentation followed by distillation.  Simple esters of cellulose or starch or dextrin of the above kind are prepared by treating cellulose or starch or dextrin with acetic anhydride in presence of pyridine sulphate or quinoline sulphate or a homologue thereof; an example is given. The mixed esters referred to may be prepared in known manner. When making these esters, cellulose hydrate, hydrocellulose, or oxycellulose may be substituted for cellulose as starting material.  Instead of these esters of carbohydrates there may be used esters of any of the other carbohydrates specified above, prepared by similar methods.  If any of these esters do not give clear solutions, they may be purified by dissolving in aqueous ethanol solution filtering, evaporating the filtrate to dryness, or precipitating it with a suitable agent such as an alcohol-ether mixture or the like.  Where reduction of the viscosity of the cellulose derivatives so obtained is necessary, this can be achieved in known manner.  Specifications 6035/13 and 3370/14, [both in Class 15 (ii)], are referred to.