Abstract: A novel process for the continuous preparation of perfluorinated organic compounds by electrochemical fluorination of the parent non-fluorinated or partially fluorinated organic compounds, in which the quantity of charge which the electrolyte can still take up is kept in the range from about 5 Ah per kg of electrolyte to about 600 Ah per kg of electrolyte during the electrochemical fluorination, can be operated continuously over a prolonged period of time without the electrode area-time yield decreasing over time and without the formation of polymeric by products occurring.

Abstract: The invention relates to a process for utilizing waste salt mixtures from HALEX reactions, comprising at least one alkali metal chloride and at least one alkali metal fluoride or bifluoride, and optionally one or more organic compounds, which are depleted by extraction, by contacting the resulting waste salt mixture with concentrated sulfuric acid, removing the resulting hydrogen chloride for the most part by flushing with an inert gas, and reacting the salt-containing sulfuric acid with calcium fluoride to give hydrogen fluoride and alkali metal sulfate-containing calcium sulfate, which can be processed to give a building material binder.

Abstract: A novel process for the continuous preparation of perfluorinated organic compounds by electrochemical fluorination of the parent non-fluorinated or partially fluorinated organic compounds using hydrogen fluoride having an arsenic content of less than about 10 ppm can be operated over a prolonged period of time without the electrode area-time yield decreasing over time.

Abstract: A novel process for the continuous preparation of perfluorinated organic compounds by electrochemical fluorination of the parent non-fluorinated or partially fluorinated organic compounds by means of hydrogen fluoride having an arsenic content of less than about 10 ppm can be operated over a prolonged period of time without the electrode area-time yield decreasing over time.

Abstract: A novel process for the continuous preparation of perfluorinated organic compounds by electrochemical fluorination of the parent non-fluorinated or partially fluorinated organic compounds, in which the quantity of charge which the electrolyte can still take up is kept in the range from about 5 Ah per kg of electrolyte to about 600 Ah per kg of electrolyte during the electrochemical fluorination, can be operated continuously over a prolonged period of time without the electrode area-time yield decreasing over time and without the formation of polymeric by products occurring.

Abstract: The invention relates to mineral building materials which contain binders, optionally aggregates and at least one additive, characterized in that the additives used are compounds which are condensation products of substituted or unsubstituted diphenyl sulphones, formaldehyde and compounds from the group consisting of mononuclear or polynuclear, substituted or unsubstituted aromatic compounds, acid amides, urea, urea derivatives, substituted or unsubstituted aromatic ethers and imines.

Abstract: A room temperature vulcanizable silica-containing silicone rubber can be produced without pretreatment of the silica by mixing specified amounts of(a) a linear organopolysiloxane of the formula ##STR1## (b) silica of a specific surface area of at least about 50 m.sup.2 /g in the presence of water and a modifying agent of the formula(R.sub.3 Si)nX,then adding ##STR2## (E) ANOTHER FILLER OR PIGMENT, THIS CONSTITUTING A FIRST COMPONENT WHICH IS MIXED WITH A SECOND COMPONENT WHICH COMPRISES(f) a silicic acid ester of the formula(RO).sub.3 SiR'(g) a heavy metal catalyst, and(h) a monohydric aliphatic alcohol of the formulaR--(CH.sub.2).sub.a --OHeven though the silica is not pretreated as was heretofore necessary, the mixtures exhibit good flow properties and the rubber is characterized by improved mechanical properties.

Abstract: A viscosity-stable composition comprising by weightA. about 20 to 100 parts of a linear polyorganosiloxane of the formula ##STR1## in which R is an optionally substituted hydrocarbon radical with up to 10 C atoms,R.sup.1 has any of the definitions of R and in addition can be an OH radical, andn is a positive integer,B. about 5 to 50 parts of a highly disperse active filler with a surface area of at least 50 m.sup.2 /g,C. about 1 to 5 parts of a modifying agent of the formula(R.sub.3 Si).sub.n Xin whichR is as defined above,X is halogen, OH, OR, S, OOCR, N or NY,Y is hydrogen or any of the definitions of R, andn is 1, 2 or 3, andD. about 0.1 to 10 parts of water (based on (a) + (b) + (c)),Is produced by treating the filler with the modifying agent, in the presence of water, during its incorporation into the polyorganosiloxane. The preferred filler is silica but may also comprise TiO.sub.2, Al.sub.2 O.sub.3, Fe.sub.2 O.sub.3 and/or ZnO. Other additives may also be included.