发明名称 |
WERKWIJZE VOOR DE BEREIDING VAN EEN SYNTHETISCHE SMEEROLIE. |
摘要 |
The process for producing synthetic lubricating oils of high viscosity index, high thermal stability and extremely low carbonaceous residue starts from polymers of extremely high viscosity, having a boiling point above 175 DEG C. These polymers are obtained by polymerisation of normal alpha-olefins of the general formula R-CH=CH2, where R is an alkyl radical having 2 to 16 carbon atoms. The polymerisation is carried out in the presence of the TiCl4/polyimine-alane catalyst in an atmosphere which is inert or at least partially replaced by hydrogen. These polymers are subjected to a catalytic hydrocracking treatment at temperatures varying from 300 to 400 DEG C. The hydrogen pressure is between 20 and 200 kg/cm<2>. The product is then distilled in vacuo up to a top temperature of 400 DEG C, relative to atmospheric pressure. Finally, the fraction of boiling point above 400 DEG C is separated off. |
申请公布号 |
NL155843(B) |
申请公布日期 |
1978.02.15 |
申请号 |
NL19740003336 |
申请日期 |
1974.03.12 |
申请人 |
SNAM PROGETTI S.P.A., MILAAN, ITALIE. |
发明人 |
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分类号 |
C10M107/02;C08F8/00;C08F8/04;C08F8/50;C10G71/00;C10M105/04;C10M107/10;C10M169/00;C10M177/00;C10N20/02;C10N60/02 |
主分类号 |
C10M107/02 |
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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