摘要:
Higher hydrocarbons are produced from methane by reacting the methane at elevated temperature, suitably in the range from 600 to 800°C, with an oxygen-containing gas having a ratio of methane to oxygen of greater than the stoichiometric ratio for complete combustion in the presence as catalyst of a lithium-doped material which under the reaction conditions is a physically base-stable, non-melting, oxygen-stable compound of an element of Groups III to VIII of the Periodic Table of the Elements including the rare earth elements.
摘要:
A rock analyser comprises a chamber containing a heater (2) and the sensor (6) of a hydrocarbon detector (7), the heater (2) being connectable to a source of power (5) and the sensor (6) being connected to the remainder of the hydrocarbon detector (7). The analyser determines the amount of hydrocarbon material present in the rock. It is portable and is useful for field screening tests to reduce the number of samples sent for laboratory analysis.
摘要:
A method and apparatus for preventing or reducing injury and loss of life and preventing, reducing or delaying damage to an aircraft in a fuel fire emergency involves supplying air under pressure from outside the aircraft to the aircraft interior to ventilate said interior, the aircraft being specially adapted to be connected to said air supply and having ducting to convey the pressurized air to the aircraft interior. Preferably the compressed air is in the form of a water mist.
摘要:
57 An inflatable sealing element comprises: (a) a body of elastomeric material having an internal chamber and being adapted when inflated to bear against a non-compressible surface to effect a seal, (b) a feed spigot for supplying fluid to the internal chamber of (a) to cause the latter to inflate, and (c) a rigid reinforcing member substantially filling the internal chamber of (a) when the latter is in the deflated condition. The presence of the reinforcing member ensures more accurate positioning of the internal chamber and greater uniformity of expansion of the body, thereby improving the seal. The seal is suitable for use in ball valves.
摘要:
Active carbon is made by treating a carbonaceous feed with a mixture of KOH and NaOH in a molar ratio of NaOH:KOH 80:20 to 20:80, and heating to at least 500°C in an inert atmosphere.
摘要:
This invention relates to a process for converting a C 2 -C 6 paraffin feedstock to aromatics over a gallium loaded xeolite catalyst. The feature of the invention is to bring the ethane in the feed with a fresh or freshly regenerated catalyst first and thereafter to bring the residual catalyst from this step into contact with the remainder of the C 3 -C 6 feedstock. The present process has the advantage of maximising the yields of aromatics from a mixed feedstock using a single reactor and a single charge of catalyst.
摘要:
Alkyl halides are prepared by reacting an alcohol with a halogenating agent in the presence of a compound of a metal of Groups IA or IIA of the Periodic Table as catalyst. The performance of the catalyst is generally improved by the addition of a solubilising agent.
摘要:
Alkyl alkoxy, aryl alkoxy or alkylaryl alkoxy halides are prepared by reacting the corresponding alkoxy alcohol with a halogenating agent, eg, thionyl chloride, in the presence of a soluble metal or compound of a metal of Groups IA or IIA of the Periodic Table as catalyst. In addition to being faster, the catalysed reaction results in an increased yield of desired product and a decrease in the tendency of the polyoxyalkylene chain to cleave.