Bunn automatic coffee maker |
| Posted: 20 Nov 2010 11:42 AM PST
First of all, history begins with a really fast. Ludwig Roselius in 1905 by decaffeinated coffee was the first time, a German coffee merchant, in the sea after having received a shipment of coffee in a storm that was dampened somewhat '. He experimented with coffee wet brine, and found that caffeine could be used benzene as a solvent for the association. Since caffeine is soluble in water at temperatures above 175 degrees, would boil the solution to separate the caffeinecoffee. With his method, the coffee was decaffeinated, but had lost much of its flavor. For the record improves, Ludwig for his trial and continued his discovery to be sold under the brand name Sanka. Benzene is no longer used because it is not considered safe for human consumption. Today, there are often used method for removing caffeine from coffee 3, with dozens of variations of these methods. Two common variations are the direct and indirectMethod. European or traditional methods – Direct method: The process directly involves the beans softened by steam, then wash and soak for about 10 hours with methylene chloride or ethyl acetate solution to the caffeine from the bean. The solution is discarded, the beans are steamed again to remove any remaining solvent (methylene chloride boiled at 114 °, ethyl acetate to 104 °), then the beans are dried to their original moisture content. Europeanor traditional methods – indirect method: Instead of steaming coffee beans are soaked in oil in very hot water, caffeine, along with many of the extracts. This solution is then either methylene chloride or ethyl acetate, treated with caffeine ties. Subsequently, the solution for the temperature at which the caffeine and methyl chloride or ethyl acetate compounds evaporate heated. The oils are then reintroduced to the beans and broad beansthen dried. About 80% of decaffeinated coffee is processed through the traditional process, or European, and many serious coffee drinkers believe that this method makes the best tasting coffee. Others worry about chemicals. methyl chloride is a superior solvent considered, as it can evaporate at lower temperatures and leaves virtually no trace in the beans, but there is a danger to the environment for workers in the decaffeination plants, and it is known that damage the ozoneLayer. ethyl acetate can be obtained and is found as a natural "chemical, but most of the ethyl acetate decaffeination synthethically is produced by several types of fruit and vegetables. The water or Swiss Water Process: Also known as process water, this process does not use chemicals, but the hot water, steam and osmosis to take steps to remove the caffeine of coffee in two parts. In the first phase, which is similar to the traditional indirect method, the beansare in a solution of warm water, soaked to remove the caffeine and aromatic oils. The beans used in this phase are then discarded. The solution is run through activated carbon filter to remove the caffeine but leaves the flavor oils. A new batch of seeds is then soaked in the solution. According to the laws of osmosis, the caffeine leaves the beans go to the gas solution, but the flavor in the solution and the beans are the same, so that leaves the taste of the beans. Beans arethen dried and shipped to the roaster. The disadvantage is that the treatment not only removes the caffeine. Some of the oils from the coffee beans are removed and so is less flavorful. The method of supercritical carbon dioxide: In this method, which are not as popular as other methods, the beans are immersed in a solution of liquid carbon dioxide to remove the caffeine. Obtained in a liquid state, carbon dioxide under high pressure (73-300Atmospheres), which makes the logistics costs of this method is a bit 'higher than other methods. After the caffeine is absorbed by carbon dioxide, there will be the pressure is reduced and carbon dioxide evaporate on the left, or the solution is through a carbon filter to remove the caffeine. Although expensive, the advantage of the method of carbon dioxide, which has no harmful carbon dioxide gas, the method is not harmful to health or the environment. OtherMethods: Since there is no consensus best way to get caffeine from coffee, there are still new methods developed beans. A new method is the process of triglycerides. In this process, coffee beans are green beans, soaked in a solution or hot water and coffee for the creation of caffeine on the surface. Then the containers are transferred to another bean oil and immersed in coffee flavor, coffee, brought out of contact. L ' Flavor oils contain triglycerides are a natural combination of fatty acids and glycerol, and after several hours at elevated temperatures, are able to eliminate caffeine from the beans, while not affecting the taste. Another new procedure, and perhaps the future of decaffeinated coffee is naturally decaffeinated coffee growing trees that have recently discovered that coffee with caffeine products. Depending on the variety of> Coffee, the caffeine content is very different, from about 75 mg to 250 mg per 6 oz cup. Arabica coffee varieties normally contain the caffeine of robusta varieties, and dark roast coffee usually has about half less caffeine than lighter roasted coffee roasting reduced because the caffeine content of the bean. An arabica bean containing a tenth as much caffeine as a normal bean has been found, so the ability to develop or find a bean without caffeineprobably a matter of time. |
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