In a combined gas and steam turbine power station with a preconnected coal gasifier and a gas cooling and gas purification system post-connected to the coal gasifier, the naphtha and oil fractions occurring are to be used for obtaining energy in a way that promises the greatest possible efficiency. To this end the invention provides for return of the tar fractions occurring in gas cooling and puri...

Polyethylene terephthalate scrap material containing on its surface a chlorine-containing polymer such as, for example, polyvinylidene chloride or polyvinyl chloride, can be recovered and reused by melt-blending it with a polymer from a defined class of ethylene copolymers containing an epoxy group, and melt processing the blend in the same manner as virgin polyethylene terephthalate. The recovere...

- 11 - O.Z. 0050/41708 Aqueous polymer dispersions containing, I as the disperse phase, a film forming dispersion polymer and II in the aqueous phase, from 5 to 40% by weight, based on the total dry mass of I and II, of a completely or partially neutralized water-soluble copolymer of a) from 50 to 80 mol % of an olefinically unsaturated mono- or dicarboxylic acid, o...

An improved water loss control additive for hydraulic cements, particularly hydraulic cements used in subterranean well bore cementing operations, is disclosed. The additive comprises an aqueous solution comprising a tetrapolymer of N-vinyl-2-pyrrolidone, acrylamide and/or methacrylamide, sodium 2-acrylamido-2-methylpropane sulfonate and/or 2-acrylamido-2-methylpropane sulfonic acid, and acrylic a...

The invention relates to a video signal processing apparatus which can be used when a video signal which is transmitted is displayed onto a screen or a CRT having an aspect ratio (e.g., 9: 16) different from an aspect ratio (e.g., 4: 3) of the video signal. In the invention, when the video signal is time base compressed and displayed onto the screen or CRT, a memory to store the digital converted...

2084148 9200775 PCTABS00010 The present invention relates to a percutaneous transluminal coronary angioplasty (PTCA) catheter (4) having an optionally fixated corewire (54). In particular the present invention relates to a PTCA catheter which may be optionally used as an over the wire catheter, a fixed wire catheter, or a semi-movable catheter, and which may be infinitely switched between the diff...

An arrangement for controlling the process temperature in an industrial process involving an extruding operation includes a summing element which sums the difference between the process temperature and a setpoint temperature with the rate of change of the process temperature and conveys this sum to a proportional and integral controller so that the output thereof acts in an inverse manner with the...

.alpha.-Fluoro-substituted N-acryloylamino acid derivatives of the formula (I), are used to make polymers optionally for chromatographic resolution of racemates into their enantiomers. The fluorine atom improves performance in many instances. Le A 27 660; .alpha.-Fluoro-substituted N-acryloylamino acid derivatives of the formula (I), are used to make polymers optionally for chromatogra...

The method of the present invention for separating pyrogens includes passing a pyrogen-containing liquid through a zirconium oxide membrane on a ceramic support. The membrane on ceramic support preferably includes a porous sintered zirconium oxide membrane on alpha-alumina support.

The method of the present invention for separating pyrogens includes passing a pyrogen-containing liquid through a zirconium oxide membrane on a ceramic support. The membrane on ceramic support preferably includes a porous sintered zirconium oxide membrane on alpha-alumina support.

Oriented polyester film composites comprise, on at least one face surface of the polyester base, a primer coating adapted to enhance the adhesion of topcoats thereto, said adhesive primer coating comprising a modified copolymer produced by aqueous phase radical polymerization of at least one acrylic monomer in the presence of a water-soluble or water-dispersible copolyester containing a plurality ...

Invention relates to a polygonal structure, which is modular on all the sides, for supporting lightweight roofing trusses movable heightwise, of the type comprising hollow-profile pillars 1 provided with at least one perimetral wall 4 having a longitudinal groove 5, these pillars 1 bring provided internally with brackets 6 for the trusses 3 having support elements 7 mounted projecting and attached...

In order to check the maximum free intercuspid space, in particular to obtain uniformity of this space along the dental arc, a sheet of wax - used to make an imprint of the centric occlusion (bite) - is examined for transparency and the image is recorded by a camera and stored, in order to allow subsequent examinations on a monitor screen, to obtain values for the thickness of the wax and therefor...

A self-propelled vehicle is equipped with an arm for picking up and unloading containers and for handling packages of pressed waste paper. Installed on the vehicle is a horizontal press which serves to compress the loose material tipped into a hopper, to form easily transportable bales of pressed material.