Beneficial energy-efficiencies in the microwave-assisted vacuum preparation of polyphosphoric acid

The use of microwave irradiation for zeolite regeneration in a continuous ethanol dewatering process

“…Thus, the energy efficiency factor calculated as the ratio Q dehydration /Q exp is 0.23, which is in a good accordance with our previous results obtained in the investigations of MW-assisted drug substances drying and phosphoric acid dehydration [27,28], wherein the same MW installation was used. Thus, it may be concluded that high factors of MW irradiation utilization can hardly be achieved at a laboratory scale.…”

“…It should be noted that the concept of the module design has been borrowed from our previous investigations on MW-assisted drying of alkali halides [28][29][30]. In result of this study the tailored MW drying equipment was designed [29], comprising an ampoule loaded with the salt to be dried, and placed in alignment into MW cylindrical cavity.…”

A Temperature-Control System for Continuous-Flow Microwave Heating Using a Magnetron as Microwave Source

“…Phosphoric acid (content: 85%, analytical purity, Tianjing Hengxing Chemical Reagent co., Ltd, Tianjing, China) is used as the testing material to evaluate the performance of the entire system. The reason why phosphoric acid is chosen as the test material is that microwave heating has been widely used in the concentration of phosphoric acid [31], [32]. Meanwhile, the viscosity of 85% phosphoric acid is relatively moderate (2.2-28 in the temperature range of 20-140 • C) [33], which is representative in general chemicals.…”

Synthesis of cocarboxylase: process intensification via microwave irradiation

“…Масса кислоты во всех опытах составляла 200 г. Подробности проведения экспериментов по МВ дегидратации Н 3 РО 4 и изучению кинетики процесса в сравнении с термическими экспериментами описаны в [17]. Авторами статьи экспериментально установлено, что скорость реакции дегидратации при оптимальной мощности источника излучения в микроволновом поле увеличивается вдвое по сравнению с термическим процессом при получении ПФК одной и той же концентрации.…”