Hydrogen and carbon oxides are reacted to form methane by passing an inlet stream of preheated methanation synthesis gas together with a recycle stream of product gas through a catalyst bed in an adiabatic methanation reactor. The inlet temperature is between 250 DEG and 350 DEG C, the outlet temperature between 500 DEG and 700 DEG C. The recycle stream is withdrawn from the outlet stream afte...

Refractory lining for e.g. casting boxes comprising a refractory matrix and precipitated silica, the silica being precipitated in situ to form a structure, imparting to the material a volume weight of from about 0.8 to about 1.2 g/cm3, the material being substantially free from carbon, hydrogen and available oxygen; process for the manufacture of such refractory lining.

Refractory lining for e.g. casting boxes comprising a refractory matrix and precipitated silica, the silica being precipitated in situ to form a structure, imparting to the material a volume weight of from about 0.8 to about 1.2 g/cm3, the material being substantially free from carbon, hydrogen and available oxygen; process for the manufacture of such refractory lining.

The alloy powder is made using apparatus comprising, in combination, a fluid-cooled hearth 12 for receiving metallic material which defines an alloy and which is to be melted, a plasma heat source 20 adapted to melt the metallic material, a powder metal producer 46, and means to introduce the molten metallic material from the hearth into the powder metal producer. The fluid-cooled walls of the hea...

The alloy powder is made using apparatus comprising, in combination, a fluid-cooled hearth 12 for receiving metallic material which defines an alloy and which is to be melted, a plasma heat source 20 adapted to melt the metallic material, a powder metal producer 46, and means to introduce the molten metallic material from the hearth into the powder metal producer. The fluid-cooled walls of the hea...

Disclosed are chlorinated low unsaturation rubbers exhibiting improved adhesion properties and improved covulcanization ability with high unsaturation rubbers. Also disclosed is a method of preparing these rubbers which comprises reacting the chlorinated rubber with certain bromine and/or iodine containing compounds.

PURPOSE:To diagnose a fault of each device in a computer system by detecting the current flowing into the output buffer of an I/O control circuit and comparing the detected value with a set value. CONSTITUTION:The open collector type output buffer 401 is connected to a bus 1 through a current detecting resistor 410. The voltage applied on both the ends of the current detecting resistor 410 is ampl...

PURPOSE:To reduce the probability of generation of malfunction at the time of runaway by monitoring the runaway of software by two decoders. CONSTITUTION:An address is supplied from a microcomputer (MPU) to the address decoders 1, 2 through an address bus. The output of the decoder 1 is connected to the input of a monostable multivibrator 3. A Q-output of the monostable multivibrator 3 is applied ...

A data handling assembly for a bookmaker is disclosed in which a data storage means stores and updates data in respect of stakes wagered on contestants the odds and the total of the stakes in order to give the bookmaker a visual record of his liability for various possible outcomes of a contest. The input data is keyed in to the data storage means by a keyboard and a printer prints individual rece...

The method comprises the chemical-mechanical polishing of amorphous aluminum oxide surfaces to a high degree of perfection. The aluminum oxide surfaces are continuously wetted with a water-citric acid slurry containing a sort abrasive material. The continuously wiping of the aluminum oxide surface is accomplished with a firm surface (16) using pressure while maintaining a relative movement between...

A composition obtained by mixing fly ash, calciumsulphate hemihydrate and oxisludge, a product caught from gases emanating from converters during steel production. Oxisludge containing substantial amounts of iron is used in an amount comprised between 0,2 and 10%, preferably 1 to 5%. The composition is a loose mass or consists of granular products.

The present invention is a specific combination of components having unique properties both in composition and benefits. Such a combination has been found in alkali or alkaline earth metal nitrates, alkanolamines and alkali or alkaline earth metal thiocyanates. In such combinations it has also been found that alkaline and alkali earth thiosulfates and chlorides below the concentration level where ...

Highly liquid self-levelling or semi-self-levelling cementitious compositions for use in forming concrete structures such as sub-flooring include hydraulic cement, a cement replacement which expands on hydration, sand, water, air-training admixtures and water-reducing admixtures, and optionally mono filament polypropylene fibres.

Compounds of the formula I wherein C1 and N4 are in trans configuration to each other, wherein R and Y are defined herein below, as bases and pharmaceutically acceptable acid addition salts thereof, processes for their preparation and pharmaceutical preparations and methods of treatment employing such compounds. The compounds are useful for treatment of disorders in the central nervous ...

In a process for producing a semiprecious stone-like, cuttable, cleavable, grindable and polishable hard paste a binder is mixed with a filler and a basic pigment to a pasty consistency, the paste is divided at least once into pieces, the pieces are coated at least once with an additional pigment and are then squashed together again. This basic material can also be reinforced by added glass or car...