摘要:
steering mechanism for a vehicle comprises a steering shaft having a steering means connected to its upper end and a steering gear (27) connected to its lower end. The steering shaft comprises an elongate energy absorbing tube (23, 25) having a bond (24) between the tube and one or both of the steering gear and the steering means. The longitudinal axial component of the bond (24) is adapted to disrupt under crash impact and to allow the tube to progressively collapse and absorb the impact energy.
摘要:
Lactones are produced by reacting an unsaturated alcohol capable of intramolecular esterification to form a. lactone ring with carbon monoxide in the presence of a protonic acid and a catalyst comprising (a) at least one of the metals palladium, rhodium, ruthenium, iridium and cobalt, and (b) at least one of the metals copper, molybdenum and iron, the metals (a) and (b) being in the form of either the elemental metal or a compound thereof.
(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:
Carbamate esters are prepared by contacting an aromatic amine, carbon monoxide, an alcohol and a protonic acid in the presence of a catalyst comprising (a) a metal selected from palladium, rhodium, ruthenium, iridium and cobalt and (b) copper.
摘要:
A flow meter suitable for the measurement of the mass flow rate of two phase flows. The flow meter has an S-shaped flow tube (5) located within a housing (1). The housing (1) has an inlet (2) and outlet (3) which are in register with the inlet and outlet of the flow tube (5). The flow tube (5) has force transducers (7) fitted at the bends of the tube which measure the reaction forces during fluid flow and enable a mass flow reading to be obtained.
摘要:
A process for producing corrosion inhibiting particles comprising binding corrosion inhibiting cations by ion-exchange to particles of silica or alumina, which preferably have a BET surface area of at least 500 m 2 /g, to form cation exchanged particles, the cations of which are releaseable by further ion-exchange, the BET surface area of the cation-exchanged particles being reduced, preferably to less than 150m 2 /g, by subjecting the cation-exchanged particles to a heat treatment which comprises heating the particles at a temperature of from 50 to 120°C while maintaining the water content of the particles at more than 15% by weight, followed by heating with removal of water to dry the particles. An embodiment of the invention comprises heating a slurry of the cation exchanged particles followed by drying e.g. spray drying.
摘要:
A composition for use after reductive activation as a catalyst for the conversion of synthesis gas to hydrocarbons having a carbon number greater than one, which composition has the formula: wherein A is an alkali metal, x is a number such that the valence requirements of the
other elements for oxygen is satisfied, a is greater than zero and less than 1%w/w, based on the total weight of the composition, b is in the range from zero to 10% w/w, based on the total weight of the composition, and CE and O constitute the remainder of the composition, is produced by the process comprising the steps of:
(A) bringing together in solution soluble salts of the metals ruthenium and cerium and a precipitant comprising a carbonate and or bicarbonate and/or a hydroxide of an alkali metal or ammonium under conditions whereby there is formed a precipitate comprising rythenium and cerium in the form of compounds thermally decomposable to their oxides, and (B) recovering the precipitate obtained in step (A). Also a process for the conversion of synthesis gas using the catalyst produced as aforesaid, optionally in combination with a zeolite.