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- [3] CONCENTRATION OF THE PHOSPHORIC-ACID EXTRACTED BY AZEOTROPIC DISTILLATION REVISTA DE CHIMIE, 1988, 39 (10): : 866 - 868
- [4] CONCENTRATION OF PHOSPHORIC-ACID BY AZEOTROPIC DISTILLATION WITH TOLUENE REVISTA DE CHIMIE, 1984, 35 (10): : 930 - 932
- [5] OBTAINING OF PURE PHOSPHORIC-ACID FROM WET PHOSPHORIC-ACID REVISTA DE CHIMIE, 1990, 41 (09): : 713 - 718
- [6] SEPARATION AND DETERMINATION OF TIN BY STRONG PHOSPHORIC-ACID DISTILLATION FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1985, 321 (08): : 760 - 761
- [7] SEPARATION AND DETERMINATION OF GERMANIUM WITH STRONG PHOSPHORIC-ACID DISTILLATION FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1985, 320 (08): : 773 - 774
- [9] HIGH-QUALITY PHOSPHORIC-ACID FROM BY-PRODUCT PHOSPHORIC-ACID SLUDGE ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1987, 194 : 30 - FERT
- [10] PURIFICATION OF WET-PROCESS PHOSPHORIC-ACID BY TREATMENT WITH METHANOL ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1973, (AUG26): : 14 - 14