摘要:
A composition suitable for forming surface coatings, laminates or composite materials formed by bringing together:(a) a first polymer containing carboxylic acid, anhydride or acid chloride groups,(b) an amine or alcohol or a derivative thereof which is a tertiary amine, a ketimine, an acetal or an oxazolidine and(c) a second polymer capable of cross-linking with the first polymer in the presence of the amine or alcohol.The components may be initially in two packs and either mixed prior to application or sprayed onto the surface simultaneously from separate nozzles.The surface coatings are particularly suitable for coating surfaces which are otherwise difficult to coat and protect and may be applied to wet or rusted surfaces without surface preparation.
摘要:
An oxygenated hydrocarbon product comprising methanol and ethanol is produced by hydrogenating carbon monoxide at a temperature in the range 150.degree. to 450.degree. C. and a pressure in the range 1 to 700 bars in the presence as catalyst of a supported mixture of the metals rhodium, silver, zirconium and molybdenum and optionally also one or more of the metals iron, manganese, rhenium, tungsten, ruthenium, chromium, thorium and potassium. The preferred support is silica.
摘要:
A high pressure gas flare using the Coanda effect has a noise attenuator surrounding the high pressure gas outlet slot. The noise attenuator is in the form of one or more upwardly diverging frusto-conical shields which may be spaced apart or closed with the body of the flare. The attenuator is particularly useful for steam driven flares.
摘要:
Strengthened zeolite molecular sieve agglomerates are prepared by treating the agglomerates with an aqueous solution of a water soluble silicon compound and subsequently with an aqueous solution of a mineral acid of sufficient strength to decationize the molecular sieve and/or increase its SiO.sub.2 :Al.sub.2 O.sub.3 ratio. The strengthened agglomerates are suitable for use as catalyst supports.
摘要翻译:通过用水溶性硅化合物的水溶液处理附聚物,随后用足够强度的无机酸的水溶液处理加强的沸石分子筛附聚物,以使分子筛分解和/或提高其SiO 2 :Al 2 O 3比例。 增强的附聚物适合用作催化剂载体。
摘要:
This invention relates to a method of dehydroisomerizing n-butane by contacting at elevated temperatures a feedstock containing n-butanes with a catalyst composition containing a gallium compound on a support. The process affords a valuable method of producing iso-butene which is a basic chemical feedstock for a number of products including polyisobutenes, methacrolein and methyl tertiary butyl ether, to name a few. The last named compound can be prepared by reacting isobutene with methanol and is a convenient means of separating iso-butene from the products of the dehydroisomerization stage.
摘要:
A functionalized silica is prepared by reacting silica with a silane and an aromatic hydroxy aldehyde. The product is useful for removing metals from solution, e.g., Cu from ATK, or in the extraction of U from solutions arising from the processing of its ores.
摘要:
A method of monitoring the wear of relatively moving parts, particularly inaccessible moving parts of internal combustion engines, comprises fixing a length of radioactive material into the part to be monitored, so that one end of the material is flush with the wearing surface, and measuring the loss of radioactivity as the surface of the part and radioactive material are worn away.An internal combustion engine having a length of radioactive material fixed into a relatively moving part, as described above, and a radiation detector which may be fitted to the outside of the engine is also claimed.The method may also be used to measure wear in, for example, pumps or compressors.
摘要:
A heat storage medium consists of sodium hydroxide and water, the sodium hydroxide concentration being in the range greater than the stoichiometric concentration in sodium hydroxide monohydrate up to and including 80% by weight, the water concentration being in the range less than the said stoichiometric concentration down to and including 20% by weight. Within this particular concentration range the tendency of the sodium hydroxide water system to supercool diminishes after a few cycles. The initial supercooling may be reduced by the addition of tellurium dioxide in amount 0.1 to 2.0% by weight of the combined weight of sodium hydroxide and water.
摘要:
Oxygenated hydrocarbon compounds containing from one to four carbon atoms, e.g. acids, alcohols and/or aldehydes are produced by reacting carbon monoxide with hydrogen in the presence of a supported mixture of a rhodium component and a chromium component, optionally incorporating also iron, manganese, molybdenum, tungsten or ruthenium at elevated temperature and generally at elevated pressure. A preferred support is silica which may be activated by the addition of metal and non-metal activators followed by calcination, prior to incorporation of the rhodium and chromium components.
摘要:
A barrier for the containment and recovery of oil spilt on water comprises a first buoyant air chamber 1, a ballast water chamber 2, an oil and water discharge tube 3 and a second buoyant air chamber 6. The first air chamber 1 has a plurality of sections of reduced diameter 7, which together with the ballast water chamber 2 define a series of weirs for oil and water to pass into a gallery formed by the ballast water chamber 2, the oil and water discharge tube 3 and the second air chamber 6. Pumps 4 may be provided in the oil and water discharge tube 3 to remove oil from the gallery. The second air chamber 6 provides buoyancy to maintain the optimum configuration of the weirs.