Abstract: A process for removing silicon compounds from aqueous NaCl brine includes, first, adjusting a weak brine to a pH value of less than 3 with hydrochloric acid. Iron(III) chloride or other trivalent iron ions are added to the acidified weak brine, the obtained weak brine is then continuously fed to a stirred dissolution vessel which contains undissolved salt in addition to brine. Fresh salt is charged batch-wise and intermittently to the dissolution vessel to produce strong brine. The obtained strong brine is fed to a stirred buffer vessel, the pH value in this buffer vessel being maintained at a level ranging from 5 to 8. A strong-brine flow is continuously withdrawn from the buffer vessel and filtered, and the filtrate containing the added iron and silicon is discharged. Also a system for carrying out this process is disclosed.

Abstract: A process for removing silicon compounds from aqueous NaCl brine includes, first, adjusting a weak brine to a pH value of less than 3 with hydrochloric acid. Iron(III) chloride or other trivalent iron ions are added to the acidified weak brine, the obtained weak brine is then continuously fed to a stirred dissolution vessel which contains undissolved salt in addition to brine. Fresh salt is charged batchwise and intermittently to the dissolution vessel to produce strong brine. The obtained strong brine is fed to a stirred buffer vessel, the pH value in this buffer vessel being maintained at a level ranging from 5 to 8. A strong-brine flow is continuously withdrawn from the buffer vessel and filtered, and the filtrate containing the added iron and silicon is discharged.

Abstract: An installation for powder coating articles, in particular vehicle bodies, comprises a coating booth, in which a plurality of application devices for the powder coating may be arranged. The articles to be coated are located during the coating process on a rotating rotary stand. Application devices located in various angular positions relative to the axis of the rotary stand may be charged with powder coatings of different colours. A collecting hopper is located at the bottom of the coating booth, the outlet opening of which collecting hopper may be brought as desired into connection with various recovery devices for powder overspray. To coat articles of different colours, the application devices charged with powder coating of the appropriate colour are activated in each case and the recovery device which collects the powder of the corresponding colour is brought into connection with the outlet opening of the collecting hopper.

Abstract: A process for the epoxidation of olefins which includes i) reacting an olefin with hydrogen peroxide in presence of an epoxidation catalyst and an alcoholic solvent; ii) separating product olefin oxide and unreacted olefin from the reaction product of step i); iii) recovering a stream comprising the alcoholic solvent; and iv) subjecting the recovered stream of step iii) to hydrogenation.

Abstract: An installation for powder coating articles, in particular vehicle bodies, comprises a coating booth, in which a plurality of application devices for the powder coating may be arranged. The articles to be coated are located during the coating process on a rotating rotary stand. Application devices located in various angular positions relative to the axis of the rotary stand may be charged with powder coatings of different colours. A collecting hopper is located at the bottom of the coating booth, the outlet opening of which collecting hopper may be brought as desired into connection with various recovery devices for powder overspray. To coat articles of different colours, the application devices charged with powder coating of the appropriate colour are activated in each case and the recovery device which collects the powder of the corresponding colour is brought into connection with the outlet opening of the collecting hopper.

Abstract: An installation for powder coating articles, in particular vehicle bodies, comprises a coating booth, in which a plurality of application devices for the powder coating may be arranged. The articles to be coated are located during the coating process on a rotating rotary stand. Application devices located in various angular positions relative to the axis of the rotary stand may be charged with powder coatings of different colors. A collecting hopper is located at the bottom of the coating booth, the outlet opening of which collecting hopper may be brought as desired into connection with various recovery devices for powder overspray. To coat articles of different colors, the application devices charged with powder coating of the appropriate color are activated in each case and the recovery device which collects the powder of the corresponding color is brought into connection with the outlet opening of the collecting hopper.

Abstract: A process for the epoxidation of olefins which includes

Abstract: An installation for powder coating articles (2), in particular vehicle bodies, comprises a coating booth (10), in which a plurality of application devices (55) for the powder coating may be arranged. The articles (2) to be coated are located during the coating process on a rotating rotary stand (7). Application devices (55) located in various angular positions relative to the axis of the rotary stand (7) may be charged with powder coatings of different colours. A collecting hopper (18) is located at the bottom of the coating booth (10), the outlet opening (20) of which collecting hopper may be brought as desired into connection with various recovery devices (21 to 26) for powder overspray.

Abstract: A process for the removal of CO.sub.2 and sulfur compounds from natural gas and raw synthesis gas wherein N-formylmorpholine and N-acetylmorpholine mixtures are used as the desorbent at temperatures between -20.degree. C. and +40.degree. C. at pressures of 10 to 150 bar in a scrubbing operation. The acid gases are removed from the absorbent by flashing and the regenerated absorbent is recycled to the absorbent.

Abstract: In the process for purifying an aqueous MDEA-solution the formate content of the MDEA-solution circulated in a main stream between the absorber and desorber of a hydrogen sulfide wash unit for gas produced by gasification of a carbonaceous material, e.g. coal, is measured. A partial stream of MDEA-solution is withdrawn from the main stream, passed over an ion exchange medium which removes some formate present to form a partially purified partial stream and subsequently the purified partial stream is returned to the main stream. The amount of the withdrawal from the main stream is controlled so that the formate content of the main stream is maintained between 10 and 30 g/l. Only from 0.5 to 0.08% by volume need be withdrawn from the main stream to form the partial stream. The ion exchange medium can be regenerated with a hydroxide-containing solution, which is subsequently fed to an ammonia separator column of a hydrogen sulfide wash apparatus.

Abstract: In the process for gasification of municipal waste plastic waste material pieces of about a 20 mm piece size are compressed and heated at a pressure of from 40 to 80 bar until at a temperature of from 230.degree. to 300.degree. C. to produce an HCl-containing gas and a plastic waste material containing less than 3000 mg of HCl per kg and the HCl-containing gas produced is washed with water to produce a hydrochloric acid solution. The plastic waste material is then heated further until at a temperature of from 400.degree. to 500.degree. C. to form a plastic melt having a viscosity of less than 300 cSt, advantageously less than 50 cSt. This plastic melt is gasified at a pressure of 4 bar with oxygen in a flame reaction to form a crude gas containing a preponderant proportion of CO in relation to CO.sub.2 in a gasification chamber having a central temperature of about 1600.degree. C. The crude gas is withdrawn from the gasification reactor at a temperature of 1300.degree. to 1600.degree. C.

Abstract: A shaft device for a bellows-type gas meter. A first eccentric cam assembly and an element having a radial groove are both coupled to the shaft. A second eccentric cam assembly having an opening is placed on the shaft. A rotatable insert element is inserted in the opening in the second eccentric cam assembly. A follower is provided on the insert element for engaging the radial groove in the element coupled to the shaft. A radial protrusion is provided for axially locking the shaft by rotating the insert element. The angle between the centerline of the first eccentric cam assembly and the centerline of the second eccentric cam assembly is adjusted by rotating the insert element.

Abstract: A circuit arrangement for determining the polarity and the magnitude of the load current in a reversible d-c controller includes a bridge circuit comprising two pairs of bridge arms connected to opposite terminals of the voltage supply bus. Each pair of bridge arms connected to the same side of the supply bus form a bypass circuit connected across the load. Two diagonally disposed bridge arms each contain a primary winding of a current transformer having two primary windings connected in opposite winding phase. Load current normally flows through either pair of diagonally disposed bridge arms, but during pauses in the load drive, circulates in one of the two bypass circuits. Electronic switches in each of the bridge arms are controlled so that the load current circulates in successive bypass periods in an alternating pattern in the two bypass circuits. When current flows in a bypass circuit, a phase sensitive voltage is induced in the single secondary of the current transformer.

Abstract: A process for preparing a filler-fortified polyalkyleneterphthalate molding composition which comprises mixing a filler with a precondensate of poly-(1,4-butylene)-terephthalate and/or poly-(1,3-propylene)-terephthalate, forming the resultant mixture into a shape and thereafter polymerizing the precondensate by solid-phase condensation under solid-phase condensation conditions; a molding composition prepared by such a process comprising poly-(1,4-butylene)-terephthalate and/or poly-(1,3-propylene)-terephthalate in an amount of 20 to 98 weight percent and 2 to 80 weight percent of a fortifying filler, the amounts based upon the combined amount of polyester and fortifying filler; a shaped object prepared from molding such a molding composition and the process for molding such a molding composition into a molded shaped article.