- Microwave-assisted synthetic method of pyrophosphate piperazine
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The invention relates to a microwave-assisted synthetic method of pyrophosphate piperazine. The specific method comprises the steps of diphosphate piperazine synthesis by phosphoric acid and piperazine in the water, and then the diphosphate piperazine is placed under microwave-assisted heating for dehydration in the vacuum state, to achieve pyrophosphate piperazine synthesis. The invention directly uses microwave to heat from the internal diphosphate piperazine molecule by adopting microwave-assisted heating method, simultaneous heating and warming from internal and external of the materials could be achieved no need of any heat conduction process, the heating speed is fast and even, conducive to implementation of dehydraton reaction and to get pyrophosphate piperazine; compared to the traditional heating method, its energy consumption only requires a fraction or several tenths of the traditional heating method to achieve the heating purpose of the same effect, which greatly reduces the costs and improves economic benefit. In addition, weight loss temperature for the products acquired is significantly improved, and the product heat stability is greatly improved compared to the products under the current technology. This method is featured with less pollution, low energy consumption and good product heat stability.
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Paragraph 0014; 0016
(2017/02/09)
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- High purity pyrophosphorate piperazinecarboxylic and flame retardant synthetic resin composition
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PROBLEM TO BE SOLVED: To provide high purity piperazine pyrophosphate giving a flame-retardant composition exhibiting excellent flame retardance, and to provide a method for economically producing the piperazine pyrophosphate. SOLUTION: There are provided piperazine pyrophosphate represented by chemical formula (I) and having a sodium content of 10 ppm or less and a production method for piperazine pyrophosphate, obtaining the piperazine pyrophosphate by dehydration condensation of piperazine diphosphate. COPYRIGHT: (C)2011,JPOandINPIT
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Paragraph 0017; 0018
(2016/12/22)
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