发明名称 |
METHOD OF PRODUCING UREA WITH IMPROVED PROPERTIES OF LOOSENESS TRANNSFER AND STORAGE |
摘要 |
Prodn. of urea with improved flow, transition and storage properties and virtual freedom from dust, comprises treating urea with 0.01-0.2 (pref. 0.05-0.1) wt.% of a 5-40 wt.% soln. of bitumen in mineral oil. The oil has viscosity of is not >50 cst at 50 degrees C; pour point is not >10 degrees C and resin content is not >3%. The bitumen is an extraction bitumen (e.g. propane bitumen) with softening point 60-80 degrees C; penetration is not >15 x 101mm and paraffin content is not >2%. The anticaking agent is added to the urea melt or to the granules; in the latter case the anticaking agent temp. is not 40 degrees C and the granules is not 10 degrees C. Treated urea remains free flowing after is not >12 months storage and is useful as fertiliser or feed additive. Smaller amts. of anti-caking agent are needed so prodn. costs are reduced. |
申请公布号 |
SU985011(A1) |
申请公布日期 |
1982.12.30 |
申请号 |
SU19797770574 |
申请日期 |
1979.05.16 |
申请人 |
VEB SHTIKSHTOFFVERK PISTERITTS (INOPREDPRIYATIE) |
发明人 |
KHEJNTS KRAMER,DD;KLAUS JASHE,DD;MANFRED OERTEL,DD;KHERMANN ROTE,DD;VOLFGANG TSAAKE,DD |
分类号 |
A23K1/00;A23K1/22;C05C1/02;C05C9/00 |
主分类号 |
A23K1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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