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公开(公告)号:US4078013A
公开(公告)日:1978-03-07
申请号:US743558
申请日:1976-11-22
CPC分类号: B01J31/122 , B01J31/0237 , B01J31/0244 , B01J31/34 , C07C6/04 , B01J2231/543 , B01J27/10 , B01J31/1805 , B01J31/181 , Y10S585/906
摘要: Improved homogeneous metathesis catalysts are obtained by the use of a nitrogenous modifying agent with a tungsten compound and organotin compound. These modified catalyst systems used for olefin metathesis give significantly increased conversions and excellent product selectivity.
摘要翻译: 通过使用具有钨化合物和有机锡化合物的含氮改性剂获得改进的均相复分解催化剂。 用于烯烃复分解的这些改性催化剂体系显着提高了转化率和优异的产物选择性。
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公开(公告)号:US4078012A
公开(公告)日:1978-03-07
申请号:US743935
申请日:1976-11-22
CPC分类号: B01J31/0259 , B01J31/0267 , B01J31/122 , B01J31/34 , C07C6/04 , B01J2231/543 , B01J27/10 , B01J31/185 , B01J31/24 , Y10S585/906
摘要: Improved homogeneous metathesis catalysts are obtained by the use of a trivalent phosphorus modifying agent with a cocatalyst comprised of tungsten hexachloride and an organotin compound. These modified catalyst systems give significantly increased conversions and excellent product selectivity when used for olefin metathesis.
摘要翻译: 通过使用三价磷改性剂与由六氯化钨和有机锡化合物组成的助催化剂获得改进的均相复分解催化剂。 当用于烯烃复分解时,这些改性的催化剂体系显着提高了转化率和优异的产物选择性。
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3.
公开(公告)号:US4393155A
公开(公告)日:1983-07-12
申请号:US408368
申请日:1982-08-13
CPC分类号: C08L95/005
摘要: Improved viscosity maintenance properties and high demulsibility values are provided by asphalt-in-water emulsions; e.g., RS-2 comprising in combination asphalt, emulsifiers and polyacrylamides having molecular weights above about 100,000.
摘要翻译: 沥青水乳液提供了改进的粘度维持性能和高的破乳性值; 例如包含分子量高于约100,000的沥青,乳化剂和聚丙烯酰胺组合的RS-2。
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