Archive for the ‘Chemical’ Category
Hallchem
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Chemical Air fresheners can have an undetermined yet worrying affect on the human reproductive system. The ill effects of air freshener use may not only be experienced by the individual using the item, but perhaps most alarmingly by the individual’s children through exposure to phthalates (pronounced thal-ates). Phthalates are the chemicals found in many popular air freshener brands. The NRDC (Natural Resources Defense Council)-the New York City based environmental action group- tested 14 commonly used air fresheners.
While the NRDC states that their testing was ‘limited’ it should be noted that 12 of the 14 brands tested contained phthalates.
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Hallchem
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Chemical Liquid Wood better known by the trade name Arboform is the ecofriendly replacement to Plastic. With environmental issues such as pollution, increased CO2 levels causing global warming and depletion of oil reserves, scientists have chosen to look for eco-friendly alternatives. One such alternative is liquid wood. Arboform is the trade name coined for liquid wood.
For decades plastics have reigned the commodity and durable goods market because of their utility and durability. In the 20th Century the introduction of plastics found uncontested utility in every home, industry or machinery. However today, in an eco-friendly and environmentally conscious decade, a soupy expanse of plastic covering approximately 1 million square miles of the Pacific ocean is a cause of serious concern and raises alarm.
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Hallchem
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Chemical The Acheson process is the oldest and still most important graphitization process. The carbon articles are placed with their long axes perpendicular to the direction of the electrical current in the furnace bed and are surrounded with a resistive bed of granular coke in which most of the Joule Heat is produced. A constant furnace resistance is essential for uniform product quality (avoidance of local temperature peaks). The way in which the furnace is loaded is therefore critical.
In Acheson furnaces articles with very different shapes can be graphitized, making the process very versatile. The capacities of currently operated furnaces range up to net loads of 100 t or more. A typical Acheson furnace is 12 to 15 m long and 3 to 3.5 m wide and is loaded with 35 to 55 t of carbon articles. After a heating time of 3 days final temperatures of 2800 to 3000°C are attained. A further 8 to 10 days are required for cooling the furnace, so that a production cycle takes about 2 weeks.
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Hallchem
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Chemical Effects of food chemicals can be very severe. Learn a few things about how food chemicals came to be a part of the foods you eat today. Products initially synthesized as chemical weapons against soldiers were eventually diverted to the fight against pests and diseases at the end of World War II. Methyl bromide, for example, a deadly odorless gas, continues to be utilized today in many agricultural technologies despite the European regulations for its proper disposal.
Methyl bromide and other similar food chemicals were used to disinfect land on which farmers were trying to develop crops. Food chemicals such as methyl bromide were also sprayed in greenhouses and on quilts and other non-food products for sanitization purposes.
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