摘要:
A fuel composition suitable for use in spark ignition internal combustion engines comprises a high octane gasoline and an alkyl furan having a boiling point of not more than 150°C. Suitable alkyl furans are 2 methyl furan and 2,5 dimethyl furan. The gasoline may be leaded or unleaded.
摘要:
An off-shore floating oil production system is provided with an improved riser support. The oil production system comprises a floating vessel 2 having a moonpool 3 and a support system for supporting a riser 16 running through the moonpool 3. The support system comprises guides 7 in the moonpool 3, a carriage 6 which runs on the guides 7 and means 11 for supporting the carriage 6 which contains a pivoted support (12, 13) for the riser 16. Means 17 are also provided for permitting rotation between a section of the riser 16 and the carriage 6. Vertical movement of the carriage compensates for heaving of the vessel, movement of the pivoted support for pitching and rolling and movement of the rotatable means for «weathervaning».
摘要:
Ethylene glycol is produced by reacting at elevated temperature methanol, a polymeric source of formaldehyde and an organic peroxide having the formula R-O-O-R 1 wherein R and R 1 are independently either alkyl or aralkyl groups containing from 3 to 12 carbon atoms. The polymeric source of formaldehyde is preferably paraformaldehyde.
摘要:
A hardenable epoxy resin composition comprising a curable epoxy resin, a hardener for the epoxy resin and a polyetherimide having the general formula; where
X is CyH 2 y, or , or -S- y is a positive integer from 1 to 5 m is 0 or 1 n is a positive integer from 20 to 150 and R' is an aromatic hydrocarbon radical having from 6 to 20 carbon atoms, or a cycloalkylene radical having from 2 to 20 carbon atoms or a divalent radical of the formula where and x is a positive integer from 1 to 5. Preferably X is C 3 H 6 and R' is preferably
The compositions are particularly suitable for use in fibre composite materials.
摘要:
An alcohol and either an aldehyde or a ketone are produced by oxidising in a liquid medium a paraffinic hydrocarbon in the presence of a soluble iron catalyst, molecular oxygen, an acid and a reducing agent which is a zerovalent metal such as iron in powder form.