发明名称 |
METHOD OF PREPARING MONOSUBSTITUTED DIHYDRATE SODIUM PHOSPHATE |
摘要 |
production of alkali metal phosphate, more particularly monosubstituted dihydrate sodium phosphate in food industry, and impregnation of fabrics to make them fireproof. SUBSTANCE: method comprises neutralization of phosphoric acid with sodium hydroxide at original sodium hydroxide to phosphoric acid molar ratio of 0.95-1.0:1, evaporation and filtration to separate impurities, maintenance of saturated solution for 100-300 minutes prior to crystallization followed by filtration and crystallization of said solution by cooling to 5-19 C. Commercial product is separated from mother liquor. EFFECT: higher quality of commercial sodium phosphate and greater process efficiency due to reduced content of impurities in final product and preparation of large transparent crystals of monosubstituted dihydrate sodium phosphate of rhombic shape. 1 tbl
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申请公布号 |
RU2162440(C1) |
申请公布日期 |
2001.01.27 |
申请号 |
RU20000116441 |
申请日期 |
2000.06.27 |
申请人 |
OTKRYTOE AKTSIONERNOE OBSHCHESTVO "REATEHKS" |
发明人 |
KESOJAN G.A.;DOBROSKOKINA N.D.;EPIFANOVA O.M.;ANISIMOVA L.M.;LERE-PLAND P.A. |
分类号 |
C01B25/30;(IPC1-7):C01B25/30 |
主分类号 |
C01B25/30 |
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