PRODUCTION OF TETRA SODIUM PYROPHOSPHATE DEPENDING ON THE LOCAL CONDITIONS

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ADABIPOUR MOJTABA; TEIMOURI FATEMEH

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Seminar: IRANIAN CHEMISTRY CONGRESS
Year:2014 | Issue:17

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Title

PRODUCTION OF TETRA SODIUM PYROPHOSPHATE DEPENDING ON THE LOCAL CONDITIONS

Author(s)

ADABIPOUR MOJTABA | TEIMOURI FATEMEH | Issue Writer Certificate

Keywords

TETRA SODIUM PYROPHOSPHATE

PHOSPHORIC ACID

SODIUM HYDROXIDE

CALCINATION

Abstract

BACKGROUND: TETRA SODIUM PYROPHOSPHATE (TSPP) WITH THE FORMULA NA4P2O7 IS USED AS A BUFFERING AGENT, AN EMULSIFIER, A DISPERSING AGENT, AND A THICKENING AGENT, AND IS USED AS A FOOD ADDITIVE. TSPP IS SOMETIMES USED IN DETERGENTS AND TOOTHPASTE AS ANTI-DEPOSITION AGENT [1]. THE CONVENTIONAL TSPP PRODUCTION METHODS INVOLVE A TWO STEPS REACTION: 1) NEUTRALIZATION OF PHOSPHORIC ACID WITH NA2CO3 AT 90-105OC FOR PRODUCING DISODIUM PHOSPHATE (DSP) AND 2) CONDENSATION OF DSP IN CALCINATION CONDITION [2].METHODS: IN THIS RESEARCH WE WISH TO REPORT OPTIMIZED PROCESS FOR THE SYNTHESIS OF TSPP USING PHOSPHORIC ACID AND SODIUM HYDROXIDE AS ROW MATERIALS. IN THE 1ST STEP, PHOSPHORIC ACID IS NEUTRALIZED TO DSP AS A MIDDLE PRODUCT THEN THE WATER OF THE REACTION IS EVAPORATED AND IN THE 2ND STEP DRIED DSP IS CALCINED TO TSPP. (FIGURE 1).RESULTS: THE NAOH/H3PO4 MOLE RATIO WAS 1.98/1 AT 98OC AND THE WATER CONTENT OF DRIED DSP WAS 6.0%. THE CALCINATION TEMPERATURE WAS 300-350OC. THE PURITY OF TSPP WAS 98%.CONCLUSION: IN SUMMARY, WE FOUND AN ECONOMICAL PROCEDURE FOR PRODUCTION OF TSPP BY A TWO STEPS METHOD. THE FEATURES OF THIS PROCEDURE ARE HIGH YIELDS, OPERATIONAL SIMPLICITY AND THE ENVIRONMENTALLY FRIENDLY METHOD. MEANWHILE, PRODUCTION OF TSPP IS DEPENDENT ON THE LOCAL CONDITIONS.

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APA: Copy

ADABIPOUR, MOJTABA, & TEIMOURI, FATEMEH. (2014). PRODUCTION OF TETRA SODIUM PYROPHOSPHATE DEPENDING ON THE LOCAL CONDITIONS. IRANIAN CHEMISTRY CONGRESS. SID. https://sid.ir/paper/909188/en

Vancouver: Copy

ADABIPOUR MOJTABA, TEIMOURI FATEMEH. PRODUCTION OF TETRA SODIUM PYROPHOSPHATE DEPENDING ON THE LOCAL CONDITIONS. 2014. Available from: https://sid.ir/paper/909188/en

IEEE: Copy

MOJTABA ADABIPOUR, and FATEMEH TEIMOURI, “PRODUCTION OF TETRA SODIUM PYROPHOSPHATE DEPENDING ON THE LOCAL CONDITIONS,” presented at the IRANIAN CHEMISTRY CONGRESS. 2014, [Online]. Available: https://sid.ir/paper/909188/en

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