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    • 6. 发明申请
    • METHOD FOR THE PREPARATION OF MELAMINE
    • 制备甲胺的方法
    • WO1998027071A1
    • 1998-06-25
    • PCT/NL1997000683
    • 1997-12-11
    • DSM N.V.VAN WIJCK, Julius, Gerardus, Theodorus
    • DSM N.V.
    • C07D251/60
    • C07D251/60
    • The invention relates to a method for the preparation of melamine from urea in which solid melamine is obtained by transferring the melamine stream leaving the reactor to a product cooling unit where the melamine stream is cooled to a temperature below 175 DEG C. More in particular it relates to a method for the preparation of melamine from urea via a non-catalytic high-pressure process by transferring the melamine melt leaving the reactor to a product cooling unit where the melamine is recovered by cooling the melamine melt using a cooling medium, the melamine melt being cooled to a temperature below 175 DEG C.
    • 本发明涉及一种从尿素制备三聚氰胺的方法,其中通过将离开反应器的三聚氰胺流转移到产物冷却单元获得固体三聚氰胺,其中将三聚氰胺流冷却至低于175℃。更具体地说, 涉及通过将离开反应器的三聚氰胺熔体转移到产物冷却单元,其中通过使用冷却介质冷却三聚氰胺熔体来回收三聚氰胺,通过非催化高压方法从尿素制备三聚氰胺的方法,三聚氰胺 将熔体冷却至175℃以下
    • 9. 发明申请
    • ROD-SHAPED PELLETS
    • ROD形状的小珠
    • WO1998016359A1
    • 1998-04-23
    • PCT/NL1997000575
    • 1997-10-14
    • DSM N.V.CLAESSENS, Hubertus, MarieBULTERS, Markus, Johannes, HenricusWALLINK, Hermanus, Antonius
    • DSM N.V.
    • B29B09/14
    • B29C70/14B29B9/14B29C47/00B29C47/0011B29K2023/12B29K2105/0094B29K2223/12B29K2309/08B29K2707/04
    • Rod-shaped pellets containing a thermoplastic polymer and glass fibres, with the glass fibres extending in the longitudinal direction of the pellet and having the length of the pellet, wherein the pellets have a core and a sleeve, with the core containing a mixture of glass fibres and polypropylene fibres, with the polypropylene of the fibres being a homopolymer or a random copolymer of propylene and less than 10 wt.% of one or more olefins from the group ethylene, 1-olefins with 4-10 C-atoms and dienes with 4-10 C-atoms, the polypropylene of the fibres having a melt index (230 DEG C/2.16 kg) of 5 - 500 dg/min. and a density of at least 900 kg/m , with at least 50 wt.% of the sleeve consisting of a polypropylene homopolymer, random copolymer of propylene and less than 10 wt.% of one or more olefins from the group ethylene, 1-olefins with 4-10 C-atoms and dienes with 4-10 C-atoms or a block copolymer of propylene and at most 27 wt.% of one or more olefins from the group ethylene and butene and at most 8 wt.% of one or more olefins from the group 1-olefins with 3-10 C-atoms and dienes with 4-10 C-atoms and the propylene contained in the sleeve having a melt index of 1 - 200 dg/min. (230 DEG C/2.16 kg) and a density of at least 900 kg/m .
    • 含有热塑性聚合物和玻璃纤维的棒状颗粒,其中玻璃纤维在颗粒的纵向方向上延伸并且具有颗粒的长度,其中颗粒具有芯和套筒,其中芯包含玻璃的混合物 纤维和聚丙烯纤维,其中纤维的聚丙烯是丙烯的均聚物或无规共聚物和小于10重量%的一种或多种来自乙烯的单烯烃,具有4-10个碳原子的1-烯烃和具有4-10个碳原子的二烯烃, 4-10个C原子,纤维的聚丙烯的熔体指数(230℃/ 2.16kg)为5-500dg / min。 和至少900kg / m 3的密度,至少50wt。%的套管由聚丙烯均聚物,丙烯的无规共聚物和小于10wt。%的一种或多种来自乙烯基团的烯烃组成 具有4-10个C-原子的1-烯烃和具有4-10个C-原子的二烯或丙烯的嵌段共聚物和至多27wt。%的一种或多种乙烯和丁烯的烯烃和至多8wt。 %的来自具有3-10个C原子的1-烯烃和具有4-10个C原子的二烯的一种或多种烯烃,并且所述套筒中所含的丙烯的熔体指数为1-200dg / min。 (230℃/ 2.16kg),密度至少为900kg / m 3。