摘要:
A method of preparing pure 3-butenyl triorgano oxysilanes, the intermediate products 3,4-dichlorobutyl triorgano oxysilanes and the use of the final products in rubber mixtures reinforced with silicic acid and vulcanizable with peroxides. 3,4-dichlorobutene-1 and trichlorosilane are used as initial products.
摘要:
Precipitated silica is mixed with a solution of caustic soda, water and sodium aluminate to form a mixture of the composition:12.+-.3 Na.sub.2 O:Al.sub.2 O.sub.3 :12.+-.3 SiO.sub.2 :200.+-.60 H.sub.2 O. This mixture was aged for 18-72 hours.
摘要翻译:将沉淀的二氧化硅与苛性钠,水和铝酸钠的溶液混合以形成组合物:12 +/- 3 Na 2 O:Al 2 O 3:12 +/- 3 SiO 2:200 +/- 60H 2 O的混合物。 将该混合物老化18-72小时。
摘要:
Novel cyclic N,N,N' and N,N,N',N'-substituted organyloxysilyl-functional silanes are prepared by reacting an aminopropyl silane with carbon disulfide and heating the dithiocarbamate.
摘要:
Gray-black pigments are prepared by encapsulating iron titanates of formula FeTiO.sub.3 in zirconium silicate crystals. Manufacture is by calcining a mixture of zirconium oxide having a particle size distribution of 6 to 10 .mu.m and a specific surface area of 2 to 5.2 m.sup.2 /g, silicon dioxide and iron and titanium oxides or Fe and Ti compounds forming oxides in the presence of mineralizers under oxidizing conditions at 800 to 1300.degree. C. Finely divided FeTiO.sub.3 can also be used.
摘要:
Glossy precious-metal preparations containing of one or more organo-precious-metal compounds, an organic carrier and a fluxing agent composed of organic metal compounds are used for microwave-resistant decorations on silicate tableware, the fluxing agent contains an organic silicon compound with three hydrolyzable groups at the silicon atom in a proportion of 0.1 to 2 moles of silicon per mole of precious metal.
摘要:
A catalyst for the production of hydrocarbon consists essentially of crystalline aluminum silicate, at least one compound of the metal zinc and/or cadmium and additionally silica. The catalyst is produced by heating a crystalline aluminum silicate, in a given case partially or completely converted to the hydrogen form, with a zinc and/or cadmium compound and molding with a silica containing binder.
摘要:
The invention is directed to a method of preparing sulfenic acid chlorides and sulfenic acid esters with hydrolyzable silyl groups in which an oligosulfane containing silyl groups is chlorinated, the sulfenic acid chloride produced is separated and converted by reaction with an alkali alcoholate to the corresponding sulfenic acid ester.
摘要:
There are prepared zeolite molded articles which also contain alkali silicate and/or alkaline earth silicate and mineral fibers and/or carbon fibers in addition to the zeolite.
摘要:
There is prepared an aqueous suspension which in addition to water, consists of 2 to 50 weight % of a mixture of bentonite and inorganic fibers, with the portion of inorganic fiber being 1 to 30 weight % and the portion of bentonite being 1 to 30 weight % and wherein the total amount of solids does not exceed 50 weight %. With the suspension there is attained an improvement of the mechanical properties of thermal insulating molded objects which are employed for thermal insulation and which for example, contain pyrogenically produced silica as a filler by delivery of this suspension on the thermal insulating plate. The suspension can also be delivered on thermal insulating molded bodies on which there is pressed a fiber net or a fiber felt. After applying the suspension several thermal insulating molded bodies can be joined together where the coating formed consisting of bentonite and inorganic fibers acts as binder. The heat insulating molded article in addition to this layer, can have one or more additional coatings based on organic or inorganic lacquer systems, silicone compositions or low melting glazes.
摘要:
The previously carried out internal coating of contact tubes not only required very much manual labor and was very time consuming, but it was also unsatisfactory in regard to adhesion of the contact liquid to the surface and homogenity of the catalyst. By the simultaneous action of heat on the liquid interface in the tubes during the lowering of the liquid level as well as by a specially suited apparatus for this purpose which operates according to the principle of communicating tubes there is provided the possibility of a good adhesion to the surface as well as the formation of a homogeneous layer at very little operating expense.