LYCOS RETRIEVER 
Nitric Acid: Nitric Acid Plant
built 630 days ago
Nitric acid is one of the feed stocks for adipic acid, which is used in the manufacture of nylon, polyurethane, and other products. The new facility will be built at INVISTA's Sakra site adjacent to their existing adipic acid plant, and this will improve the efficiency of the unit. The nitric acid plant is the latest in a series of Asia growth initiatives that INVISTA has embarked on. The construction is expected to complete by mid 2009.
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During 2000 Lovochemie, a Czech Republic-based fertiliser producer, decided to invest Koruna 1.3 billion to build a new nitric acid production plant. The unit, which is called KD 6, has a capacity of 900t/d (300,000t/yr) of 100% nitric acid. The production plant replaces four old plants, KD 1-4, which have been in operation for almost 50 years.
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Huet testing (ASTM A 262 Practise C) is a common method to check the corrosion resistance of stainless steel for use in nitric acid. As the test is done in boiling nitric acid at 65 % concentrasion it reflects very the typical corrosion situation in nitric acid plant. Welding will affect the corrosion resistance and to check the effects the test samples can be heated at about 600-700C before performing the corrosion tests. As can be seen the corrosion rate of 2RE10 is very marginally affect by heat even if the samples have been heated for 100 hours.
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The nitric acid plant uses single pressure process technology provided by France's Grande Paroisse. In a single pressure plant the oxidation and absorption take place at the same pressure. The process is said to benefit from proven reliability, low investment costs and low NOx tail gas content.
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Ground breaking for the nitric acid plant was held today. Among the dignitaries in attendance were Aw Kah Peng, Assistant Managing Director, Singapore Economic Development Board, and Julian Ho, Executive Director, Energy Chemicals and Engineering Services, Singapore Economic Development board, as well as Warren Primeaux, President of Intermediates at INVISTA, and Rick Dobzelecki, Vice President of Intermediates in Asia Pacific.
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Nitric Acid Plant