Abstract: The residue or residue fraction left behind during vacuum distillation in a crude oil refinery is further processed, in that it undergoes thin-film short-path distillation at a higher temperature and under a fine vacuum. Raising the temperature leads to a rise in the feed rate and to an improvement in the distillate/residue ratio.

Abstract: A method for constructing tanks from plates which combines lifting and rolling movements along a helical line which permits stepwise displacement of the plates.

Abstract: A new method and a new device for the construction of tanks from plates. The device comprises a cylindrical jacket for a vertical tank made from the plates. The plates are connected to one another to form from a bottom part with a ring attached thereto forming a bottom unit of the tank and an upper helically-shaped edge. A cover part is formed comprising a cover with a ring attached thereto, having a lower, correspondingly helically-shaped, edge. The bottom part is placed below the upper part whereafter space for the insertion of additional plates is provided through the stepwise displacement of the cover part relative to the bottom part along a helical line following the edge to make the jacket. The cover part is lifted along the helical line by a linear lifting movement and by a simultaneous rolling movement of the cover part to its dead weight to move along a surface which is inclined in the opposite sense to the inclination of the helical line.

Abstract: A process for preparing fusible, crosslinkable resinous intermediates of polyaddition and polycondensation resins consisting essentially of continuously proportioning and feeding a resin precursor composition in solid and liquid form, in a mixing and kneading machine, intensively mixing the resin precursor composition in both the longitudinal and transversal directions and simultaneously heating said composition, thereby plasticizing and homogenizing the same below the temperature of cross-linking and hardening and at a temperature of 50.degree.-90.degree. C during a brief average dwell time in the mixing chamber of said machine which will prevent excessive stiffening of the mixture in the form of a pasty mass to thereby plug the machine, continuously expelling the plasticized intermediate resin mix at a temperature of 50.degree. to 90.degree. C in the form of a pasty mass through a hollow die with twin conical outlet heated to a temperature of not more than 50.degree. C.

Abstract: A method for welding of steel pipe to a pressure vessel comprising the steps of cutting an opening in the wall of the pressure vessel, joining a connection member which consists of a thickened rim or lenticularly shaped disc, aligning the disc with a bore at a right angle to a tangential plane of the outer surface of the connection member, and welding in two specific areas whereby said first weld at the rim of said forged disc to the wall of said pressure vessel has greater strength against notch breaking at the thicker portion and the second welding at the opening of the wall of said pressure vessel provides a smooth transition.