1. A tool (70) for closing a production column (100) in a well containing fluid under pressure and designed to be lowered on the end of a suspension cable (76) and to be temporarily fixed coaxially inside a sleeve (102) of a tool connector (101) incorporated in the production column, said connector being of greater diameter than said column, said tool including a valve member (60) for co-operating...

Process for operating a plant for the gasification of fine-grained to dusty solid fuels, having a gasification reactor equipped with gasification burners, a device for separating fly dust from the crude gas, a fly dust receiver and a device for recycling fly dust into the gasification reactor. The gasification burners burn into the gasification reactor with a fuel/reactant jet which is rotationall...

For the improvement of the positioning accuracy of rotary drives, especially of robots, the load-dependent moment is measured in at least one gear linkage. With the aid of the compliance characteristic curve (torsion angle as a function of the moment) of the gear linkage, the angle of rotation of the gear linkage is then readjusted by a corresponding drive angle. The compliance characteristic curv...

Use of a single-layer plastic film comprising oriented polypropylene as a covering and/or separating film in the production of laminate sheets, the polypropylene film containing inorganic fillers, for example CaCO3, BaSO4, silicates or the like.

The automatic transmission of the invention comprises a mechanical countershaft transmission 11, gear synchronizer 22, 23 and clutch 12 which have been automated by the addition of electro-mechanical and pneumatic operators 15, 18, 21 and an analog and digital electronic control system 24. The electronic control system receives operator commands regarding the mode of transmission operation (either...

An electromagnetic friction brake whose components are held in assembled relationship by pins which are received with a press fit within holes in an electromagnet and an end plate and which are received with a loose fit within holes in an armature. By virtue of the pins, an assembly gage may be used to automatically establish an air gap of desired width between the armature and the electromagnet w...

A composition useful in producing an open-cell, elastomeric silicone foam combines a silicone oil-in-water emulsion, which forms an elastomer upon removal of the water, with an aerosol propellant. When the composition is discharged to atmospheric pressure, a froth is formed. Removing water from the froth yields an open-cell foam. The froth is stabilized by surfactants, thickeners, or froth stabili...

The present invention relates to hard foams having foamed and hardened phenolic resins as binding agents, and in which over 90% of the filler is aluminum hudroxide. The filler content is more than 100% with respect to the resin content of the foams. The foamble, filler-containing composition used for the production of the foams is very fluid and can be used directly for the production of moldings ...

An ethylene- alpha -olefin copolymer comprising ethylene and one or more alpha -olefin having from 3 to 10 carbon atoms, the copolymer having an alpha -olefin content of from 1.0 to 8.0 mol%, a density of from 0.900 to 0.930 g/cm<3>, and a melt flow rate of from 0.1 to 100 g/10 min., the programmed-temperature thermogram (see the drawings) of said copolymer as determined with a differential scan...

In accordance with the present invention, there is provided a bubble-containing ethylene/ alpha -olefin rubber excellent in kneadability, characterized in that the ethylene/ alpha -olefin rubber prepared by copolymerization of 50 - 95 mol% of ethylene, 5 - 50 mol% of alpha -olefin having at least 3 carbon atoms and 0 - 10 mol% of non-conjugated polyene contains 5 - -1000 parts by volume, based on...

In the manufacture of thermoplastically processable starch, an additive is essentially mixed with native or natural starch and the mixture is caused to melt by the application of heat and mechanical energy. The additive is a substance which lowers the melting point of the starch so that the melting point of the starch together with this additive lies below the decomposition temperature of the star...

The invention provides a method for the preparation of a stable aqueous emulsion of a poly(silsesquioxane) without formation of gelled particles. In the method, a trialkoxysilane compound as the starting material is first emulsified in an aqueous medium containing a cationic surface active agent and a non-ionic surface active agent having a specified HLB value in the range from 16 to 20 in combina...

30,987 PROCESS FOR THE PREPARATION OF POROUS POLYMER BEADS Isotropic porous polymer beads having a high controllable surface porosity and large pore diameters from about 0.002 to about 5 microns are produced from solutions of an acrylonitrile polymer or a copolymer by a thermally-induced phase separation process including intensively shearing the polymer solution into small droplets. The use of mi...

Using a membrane separating device to remove cell-free fluid from a suspension of cells to preconcentrate cells in the suspension prior to processing in a centrifuge.

A hydrotreatment method, for example, hydroviscoreduction or hydrodesulfurization in which the charge of hydrocarbons is reacted with hydrogen in contact with a catalyst finely dispersed in the liquid phase. To separate the product from the catalyst, the effluent freed from its accompanying free gas is passed along, and in contact with the upstream wall of a porous inorganic membrane. The oil that...

Process is disclosed for the selective mono-epoxidation of styrene, styrene analogs, and styrene derivatives. Such compounds are contacted with an oxygen-containing gas in the presence of a promoted, optionally supported silver catalyst under defined reaction conditions, thereby selectively producing epoxides in good yield.

A process for the treatment of a spent hydrochloric acid solution containing dissolved iron, zinc, and minor amounts of heavy metals to remove such dissolved metals from the solution, which process comprises contacting said solution with metallic iron in a first stage, whereby trivalent iron present in the solution is reduced to divalent iron and certain of said heavy metals may be reduced to elem...

The present invention relates to cooling oils which are free of salt, alcohol, halohydrocarbons and halocarbons and have a low viscosity at low temperatures and which consist of mixtures of hexamethyldisiloxane and/or octamethyltrisiloxane and/or linear decamethyltetrasiloxane and/or octamethylcyclotetrasiloxane and/or decamethylcyclopentasiloxane.

A method of obtaining a bacterial ferment for a medical-dietetic product provides for cultivation on the milk of an initial lactic acid bacteria mixture. The mixture of initial lactic acid bacteria comprises Streptococcus thermophilus 108, Streptococcus lactis subsp. diacetilactis 13c65-64, Streptococcus thermophilus 66-1413, deposited on 11.07.88 at the USSR Research Institute for Genetics and In...

Vibrations generated by interaction of a cutting tool and workpiece are sensed and a high frequency vibration signal with a frequency in a range between 30KHz and 100KHz is derived. At least one parameter related to force acting on the tool during a cutting process is sensed and a low frequency signal with a frequency less than about 1 KHz is produced. Each of the signals is preprocessed, sampled ...