| 摘要 |
organic chemistry, particularly, preparation of DL-aspartic acid. SUBSTANCE: described is synthesis of DL-aspartic acid from maleic anhydride, aqueous ammonia, hydrochloric acid in the presence of carbamide clatrate catalyst with didecylmethylammonium bromide at temperature of 140-145 C and pressure of (5,0-5,5).105 Pa. This enables one to attain 72-80 % of "pure" DL-aspartic acid. Use of aqueous ammonia and hydrochloric acid instead of sodium chloride. EFFECT: more efficient preparation method. 2 cl, 1 tbl |
