Disclosed is a method for stopping and starting a reactor equipped with a heat exchanger, a catalyst settler, a catalyst filter and the like, which method is suitable for use in a process for the preparation of acrylamide by reacting acrylonitrile with water in the presence of a metallic copper-based catalyst used as a suspended bed. According to this method, various undesired phenomena which may ...

PURPOSE:To carry out the traction control and the torque distribution control in the optimum state during the four-wheel slip by increase-correcting the differential limit torque of a torque distribution control means, in four-wheel slip. CONSTITUTION:The existence of the four-wheel slip is judged by a four-wheel slip judging means 62 from the four-wheel revolution speed signal of the left and rig...

A method and an apparatus for removing residual rovings on roving bobbins in a most efficient manner are disclosed. A roving bobbin has an annular sticking cloth secured to a portion of the peripheral surface thereof for attaching of a wind-starting end of a roving wound around the roving bobbin. The roving bobbin is rotated in a direction in which the roving is wound around the roving bobbin. A j...

To lay a yarn at a constant speed on to a bobbin, clamped to a rotating spindle, the yarn is deflected between the yarn take-off and the sleeve at a point behind the sleeve, as seen from the take-off point of the take-off appts. The deflection point lies between the tangents from the take-off point towards the plane where the yarn is caught at the sleeve. After the yarn has been caught, the deflec...

Coatings, which act as barrier layers to inhibit migration of alkali metal ions from a glass surface and/or act as colour suppressing underlayers for overlying infra-red reflecting or electrically conducting layers, are deposited by pyrolysis of a gaseous mixture of a silane, an unsaturated hydrocarbon and carbon dioxide on a hot glass surface at a temperature of 600 DEG C to 750 DEG C.

PURPOSE:To efficiently and uniformly distribute Ru and/or Pt from the surface of a catalyst toward the interior by dissolving an Ru compd. and/or a Pt compd. in an ethanol-water mixture having a certain ethanol content or above. CONSTITUTION:When a catalyst supporting groups VI and VIII metals of the periodic table is produced, a soln. prepd. by dissolving an Ru compd. and/or a Pt compd. in an eth...

PURPOSE:To obtain a powder of the title phosphor which is excellent in luminescence efficiency and luminance and suitable for an AC electroluminescent element and has a relatively large particle diameter by firing a ZnS powder containing a given amount of Cu under a specified condition followed by cooling. CONSTITUTION:A ZnS powder containing 0.05-0.50wt.% Cu is placed in an atmosphere of HCl or a...

PURPOSE:To obtain a powder of the title phosphor which is excellent in luminescence efficiency and luminance and suitable for an AC electroluminescent element and has a relatively large particle diameter by firing a ZnS powder containing given amounts of Mn and Cu under a specified condition followed by cooling. CONSTITUTION:A ZnS powder containing 0.50-2.00wt.% Mn and 0.01-0.50wt.% Cu is placed i...

PURPOSE:To prepare a stainproofing agent for a dilution steam-generating system in an ethylene production process by compounding a nitrite salt with an N,N-dialkylhydroxylamine. CONSTITUTION:A stainproofing agent contg. at least one nitrite salt and at least one N,N-dialkylhydroxylamine in a wt. ratio of the nitrite salt to the hydroxylamine of about (1:9)-(9:1) as the effective components. The ni...

The ski binding with a device for compensating the calibration load for toe unit safety release includes a heel unit (1) with a sliding body (20) and a toe unit which is equipped with safety release means associated with a lamina (4) on which a main spring (10) for toe unit calibration act. An elastic recovery spring (25) interacts between the sliding body (20) which supports the heel unit jaw (21...

A process for the production of mouldings having a density of at least 120 kg/m<3> from polyurethane foams having a compact surface by foam-moulding a reaction mixture comprising a) a polyisocyanate component, b) a reactive component containing groups which are reactive towards isocyanate groups, c) blowing agents and optionally d) further assistants and additives, where the blowing agents...

A disposable, inexpensive electrode for an electrochemical sensor includes a laminated anode and a laminated cathode. The anode is a film substrate with anodic material such as platinum deposited on the substrate. The cathode is also a film substrate with cathodic material such as silver deposited on the substrate. The anode and cathode can be laminated with an intermediate layer of dielectric mat...

Rigid mould for moulding rubber tyres, constituted by a core 3 for defining the inner shape of the tyre, lateral portions 2 and a ring 1 of sectors. So as to be able to close such a mould, all the parts are designed to slide over each other during the final phase of their closing movement.

The automatic monitoring system is used to detect the presence of indivdiuals in regions assigned for the movement of fork lift trucks and similar vehicles. The system uses a flash bulb arrangement coupled with a LCD camera to identify the presence of an individual or object. The object region is illuminated by flash units lcoated on both sides of the track and are alternated to create a shallow ...

A tyre carcass is coated on the inner side and its outer side is coated on the centre section and has tread and side faces. The inner side coating is cylindrical rubber tube which is free from any joints circumferentially. Pref. a tubing of butyl rubber G is extruded and is cut off into a length so as to form a cylinders for use as the inner layer concerned. This is then coated on the inner side w...

The invention relates to a process for preparation of rigid polyurethane foams having low thermal conductivity by reacting   a) organic and/or modified organic polyisocyanates with   b) at least one relatively high molecular weight compound having at least two reactive hydrogen atoms and optionally   c) low molecular weight chain extenders and/or crosslinking agents in the presence of   d) c...

A composite of at least two components that are mutually reactive is described, characterised in that it contains the components in the same or different form in at least two different zones, which are separated from each other, and preferably at least two different zones have a different colour. Preferably this type of composite consists of two or more superimposed parallel layers. The composites...

Organic coatings adhere better to polyester film base if the film base is first subjected to electron-beam irradiation while passing through an inert atmosphere such as nitrogen. This electron beam priming method is useful for applying such coatings to biaxially oriented polyester as magnetic tape dispersions and silicone release liner coatings.