摘要:
Synthetic plastic materials for the manufacture of extrusion, injection and press forms are described, which are prepared from elastomers as well as mixed- and copolymers thereof with thermoplastic properties and liquification products from extractive coal hydrogenation which are residues with a softening point between 50.degree. and 150.degree. C. Polar, aromatic or cyclic groups in the elastomer component increase the compatibility of the coal liquification residue with the elastomer and improve the mechanical properties of the products.
摘要:
Self-curing or curable materials are obtained from the distillation residues of coal hydrogenation by condensing a residue of this type having a softening point of 30.degree. to 54.degree. C. in a first stage with a mono- or dihydroxybenzene and/or a methylhydroxybenzene and/or an ethylene substituted benzene. These reactants are used at a ratio of residue to benzene derivative between 1:1 and 2:1 and the reaction is carried out in the presence of acid at a pH of 1 to 2 and at a temperature of 90.degree. to 100.degree. C. In a second stage the thus obtained reaction product is then further reacted at about the same temperature with an aldehyde. As a result a novolak-type resin is obtained. The invention permits the making of inexpensive self-curing or curable materials with properties similar to those of phenolic acids. Besides, the invention also provides an outlet for the high boiling residue of the extractive coal hydrogenation which otherwise had little use.
摘要:
Synthetic form masses are described which are derived from thermoplastic polyolefins as well as mixed and copolymerisates thereof and a coal liquification product. The coat liquification product is a residue which precipitates out during extractive hydrogenation and has a softening point between 70.degree. and 200.degree. C. The thermoplastic polyolefin contains a component of polar, aromatic or cyclic monomers, which improve the compatibility of the components in the mixture. The form masses from this mixture, which may include filler material, have excellent tear resistance properties.
摘要:
A membrane having a preselected pore type which is suited for separating processes comprising a shaped body formed by heating a mixture of finely ground carbonaceous material with a binder composed of about 5 to 20% by weight natural or synthetic elastomer or a mixture of both and of about 1 to 20% by weight of thermoplastic material to about 400.degree. to 1400.degree. C. in an inert atmosphere at a rate of temperature increase between 0.1.degree. and 10.degree. C./min. The membranes are useful for a wide range of selective chemical and physical separation operations of different materials.
摘要:
Coal-containing shaped bodies are made by intimately mixing particulate coal with 10 to 30 percent by weight of a polymer. The mixture is shaped by subjecting it to a pressure between about 295 and 3430 newtons per square centimeter. Shaping takes place within a temperature range of 100.degree. to 250.degree. C. The shaped bodies have high compressive and bending strengths and can be precisely dimensioned.
摘要:
A carbonaceous adsorbent in the form of a shaped body which has been heated to about 400 to 1400.degree. C in an inert atmosphere is composed essentially of a mixture of finely divided carbonaceous material of a grain size below 50 and up to below 100 microns with a binder composed of about 1 to 20% by weight of a natural or synthetic elastomer and about 1 to 15% by weight of a thermoplastic material. The adsorbent is made by subjecting the mixture to a shaping step followed by heating to a temperature of about 400.degree. to 1400.degree. C in an inert atmosphere which step may be followed by an activation of the carbonaceous material.
摘要:
Coal-tar pitch is heated to a temperature which is at least 100.degree. C above its softening point but below its decomposition temperature and is mixed with a filter aid, such as kieselghur or activated carbon prior to filtering the pitch at at least the preheat temperature so as to remove ashes, soot and heavy metals therefrom. The thus-purified pitch is then coked. In this manner, it is possible to obtain high-quality, anisotropic acicular coke which is readily convertible into graphite.
摘要:
A composition for sound absorbent panels, which may be utilized in construction elements, comprises a mixture of 70 to 97 weight percent of carbon-contained material and a binder of synthetic plastic material. The carbon-contained material used in the composition contains 50-60% of pure carbon and 40-50% of inorganic constituents and may be obtained from residues of coal hydrogenation or pitch filtration. The material is treated at an elevated temperature and under pressure before the binder is added thereto and then the obtained compound is formed into a panel.
摘要:
Manufacture of isotropic coke by first selecting as feed material tar from low temperature carbonization with a hydrogen content above 5.5%, a carbon content less than 88% and a softening point above 60.degree. C., filtering the tar to remove solid particles, and heating the filtrate to a temperature between about 900.degree. C. and 1300.degree. C. to form an isotropic coke.
摘要:
A process is provided for purifying filter-clogging coal tar residue of the type obtained by low-temperature carbonization of coal. Such coal tar residues include viscous organic coal tar constituents, particulate solid impurities and liquid water. Applicants' process includes the step of heating coal at 450.degree.-700.degree. C. at least substantially in the absence of air to thereby decompose the coal to products including coal tar, the coal tar being of the type containing liquid water, particulate solid impurities, and viscous organic coal tar constituents including light oils, the light oils incidentally combining with the liquid water to produce a filter-clogging emulsion. The thus-formed coal tar is then heated to a temperature above the boiling point of water and sufficiently high to thereby distill off substantially all of the water and the light oils to thereby obtain an intermediate product which is substantially free from the presence of liquid water and light oil constituents which in combination form a filter-clogging emulsion. Finally, the intermediate product is subsequently filtered to thereby separate the particulate solid impurities from the undistilled viscous constituents of the coal tar.