Thermal cracking wax to normal alpha-olefins
US4042488A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1975 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Oct 23, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/22
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Normal alpha-olefins containing minimum paraffin content are prepared from hydrocarbon wax streams by a process which comprises PA1 Preheating a charge wax stock to thermal cracking temperature; PA1 Passing said charge wax stock during said preheating operation through the intermediate temperature range of 625.degree.-800.degree. F in a time less than about 8 seconds whereby the desired product contains a decreased proportion of paraffin impurities; PA1 Thermally cracking said preheated charge wax stock in vapor phase in the presence of steam at thermal cracking conditions thereby forming a product stream cracking effluent containing desired product n-alpha olefins containing 6-18 carbon atoms together with decreased proportion of paraffin impurities; PA1 Separating said desired product n-alpha olefins containing 6-18 carbon atoms from said product stream cracking effluent; and PA1 Maintaining the Severity Value of said product stream cracking effluent during said separating less than about 66.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.