| 摘要 |
<p>1,153,946. Nitrogenous fertilizers. SCHOLVEN-CHEMIE A.G. 13 July, 1967 [16 July, 1966], No. 32356/67. Heading C1B. [Also in Division C2] Fertilizers having a N-content of 26-35% are prepared by condensing urea with a mixture of furfurol and formaldehyde in aqueous solution in the presence of a condensation catalyst. An excess of urea may be present.</p> |
