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2010•Zhongguo yaofangRequires access

Improved Synthesis Technology of 5-nitrosalicylic Acid

Lu Yang

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Abstract

OBJECTIVE:To synthesize 5-nitrosalicylic acid by a new method.METHODS:5-nitrosalicylic acid was synthesized using salicylic acid as raw material and urea nitrate/sulphuric acid as nitrating agent.The influences of material ratio,reaction temperature and reaction time were investigated with yield of nitration as index.RESULTS:Optimal reaction condition was as follows:ration of urea nitrate to salicylic acid(mole ratio) was 1.2:1;reaction temperature was 25 ℃ and reaction time was 6 h.The yield of nitration was 86.4%.CONCLUSION:The method is characterized with high yield and moderate reaction condition.It is suitable for industrial production.

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What this paper is about

OBJECTIVE:To synthesize 5-nitrosalicylic acid by a new method.METHODS:5-nitrosalicylic acid was synthesized using salicylic acid as raw material and urea nitrate/sulphuric acid as nitrating agent.The influences of material ratio,reaction temperature and reaction time were investigated with yield of nitration as index.RESULTS:Optimal reaction condition was as follows:ration of urea nitrate to salicylic acid(mole ratio) was 1.2:1;reaction temperature was 25 ℃ and reaction time was 6 h.The yield of nitration was 86.4%.CONCLUSION:The method is characterized with high yield and moderate reaction condition.It is suitable for industrial production.

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Available abstract

OBJECTIVE:To synthesize 5-nitrosalicylic acid by a new method.METHODS:5-nitrosalicylic acid was synthesized using salicylic acid as raw material and urea nitrate/sulphuric acid as nitrating agent.The influences of material ratio,reaction temperature and reaction time were investigated with yield of nitration as index.RESULTS:Optimal reaction condition was as follows:ration of urea nitrate to salicylic acid(mole ratio) was 1.2:1;reaction temperature was 25 ℃ and reaction time was 6 h.The yield of nitration was 86.4%.CONCLUSION:The method is characterized with high yield and moderate reaction condition.It is suitable for industrial production.

Key concepts: Nitration, Yield (engineering), Salicylic acid, Chemistry, Urea, Raw material, Reaction conditions, Nuclear chemistry

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