A two stage reaction for the production of steel from iron carbide is carried out in two separate but interrelated reactors. In the first reactor, iron, carbide, with slag formers, is fed into a feed end and the reaction is well-mixed by the vessel geometry, the stirring action below-surface injection of oxygen and iron carbide feed, and the evolution of gases from the liquid metal bath. The produ...

A method and apparatus for determining the hydraulic isolation of layers in an earth formation. The characteristics of various interfaces between the materials in the borehole are evaluated. An acoustic investigation is performed by directing an acoustic signal at a radial segment of the borehole. The signal passes through the casing and the fill material and produces a resulting signal which has ...

The invention relates to a logging method and apparatus for investigating the geometrical characteristics of a borehole. The apparatus comprises an array of circumferentially spaced apart azimuthal current electrodes (Aazi) disposed on a sonde (21), and an annular current electrode (A) longitudinally spaced apart from the array of azimuthal electrodes. Currents (Ici) are emitted between the azimut...

A method of monitoring a fluid reservoir traversed by at least one well comprised the following steps: at least one electrode is connected to the surface and fixed in permanent manner in the well under conditions isolating the section of the well in which it is located hydraulically from the rest of the well and providing electrical coupling between the electrode and the reservoir; a current i...

An adhesive composition for filling box parts of vehicle bodies includes from 20 to 35 % of PVC resin (PVC/PVA) and from 5 to 15 % of a hot-expanding agent constituted by an acrylonitrile/acrylic ester/olefin copolymer, encapsulating an appropriate quantity of a C4-C6 alkane.

An adhesive-dispensing method applies a pattern of adhesive onto a circuit-board carrier such that any discontinuities in the pattern, i.e. starting points, end-points or turning-points, are outside a footprint of a pair of substrates (11,12) or MMICs intended to be attached, adjacent each other and spaced apart, to the circuit-board, and in particular outside such footprint in the area of transit...

Composition for a roadway course comprising sand and/or gravel which are prepared from electrical furnace steelworks slag mixed with one or more binder(s) chosen from hydraulic binders, pozzolanic fly ash, derivatives of pozzolanic fly ash and the mixtures thereof, and at least one activator, or else with one or more binder/activator(s). This composition for a roadway course makes it possible to o...

PCT No. PCT/GB94/01074 Sec. 371 Date Jun. 24, 1994 Sec. 102(e) Date Jun. 24, 1994 PCT Filed May 19, 1994 PCT Pub. No. WO94/28032 PCT Pub. Date Dec. 8, 1994The invention relates to continuous gas fluidized bed polymerization of olefins, especially ethylene, propylene, or mixtures of these with other alpha olefins, wherein the monomer-containing recycle gas employed to fluidize the bed is cooled to ...

The invention concerns a process for reducing the alcohol content of an aqueous mixture comprising the steps of: (a) contacting one surface of a microporous hydrophobic membrane with the aqueous mixture; (b) contacting the other surface of the membrane with water or a dilute salt solution; and (c) collecting the aqueous mixture; wherein alcohol evaporates from the aqueous mixture, passes through t...

A combined alumina cement / gypsum product comprises 100 parts by weight of alumina cement, 10 to 100 parts by weight of an aqueous polymer precursor emulsion (Component A), and 15 to 600 parts by weight of a hemi-hydrate gypsum (Component B). Component A preferably comprises a thermosetting acrylic resin, and Component B is preferably an alpha-hemihydrate gypsum or an anhydrous or retarded plaste...

Ring-contracted N-demethyl-N-isopropylerythromycin A derivatives with gastrointestinally effective motilin-agonistic properties and the preparation thereof are described.

PCT No. PCT/EP93/02821 Sec. 371 Date Jun. 1, 1995 Sec. 102(e) Date Jun. 1, 1995 PCT Filed Oct. 11, 1993 PCT Pub. No. WO94/08999 PCT Pub. Date Apr. 28, 1994New substituted pyrazole derivatives of general formula I are described (I) in which R1, R2, R3, R4, R5 and R6 have the meanings given in the description , processes for their preparation, as well as intermediates, and their use as ...

PCT No. PCT/IB94/00283 Sec. 371 Date Mar. 8, 1996 Sec. 102(e) Date Mar. 8, 1996 PCT Filed Sep. 19, 1994 PCT Pub. No. WO95/09863 PCT Pub. Date Apr. 13, 1995Intermediates and a process for preparing doramectin, the compound of formula (I), semisynthetically from by-product in the fermentation procedure which also yields the compound of formula (I). The intermediates prepared by the process of this i...

Erythromycin derivs. of formula (I) and their acid addn. salts are new: wavy line indicates 10(R) or 10(S) methyl; R1, R2 = H or up to 24C opt. unsatd. hydrocarbyl (opt. interrupted by 1 or more heteroatoms and opt. carrying 1 or more functional gps.); or R1 + R2 = a heterocycle, opt. with 1 or more additional heteroatoms (N, O and/or S); or R1 + R2 = a gp. of formula (i); R1', R2' = H or up to 23...

Disclosed are a statistical multiplex system, a statistical multiplex controller and a method of statistical multiplex, which can assign bit rates to program data and auxiliary data efficiently, and also improve image quality. A statistical multiplex system is provided with: a plurality of image encode rs for encoding a plurality of program data an information encoder for encoding the auxiliary d...

A Fischer-Tropsch catalyst is activated by a process comprising reducing the catalyst by contact with a hydrogen-containing gas, the hydrogen concentration and the space velocity of the gas contacting the catalyst increasing step-wise or continuously during the activation. The process may be employed to activate a fresh catalyst prior to its use or to regenerate an exhausted or partially exhausted...

A Fischer-Tropsch catalyst is activated by a process which comprises contacting the catalyst with a hydrogen-containing gas in a first stage at a pressure of up to 5 bar, rapidly increasing the pressure to at least 10 bar and contacting the catalyst with a hydrogen-containing gas in a second stage at this pressure. The process may also be used to reactivate an at least partially exhausted catalyst...

The invention relates to a process for the removal of mercury and/or other heavy metals from a cracker feed with the aid of an adsorbent. The process is characterized in that the feed is also subjected to magnetic filtration.

An improved lightweight armored vehicle and a cost effective method of retrofitting standard automobiles to make them lightweight armored vehicles. Metal edge channels and edge caps fit about laminated windows to protect the laminated edges for stress, moisture and atmosphere and fit within the standard automobile original window frames. Prefabricated formed lightweight composite armor is molded t...

A method of conducting a continuous multi-phase catalytic reaction such as the conversion of syngas to higher hydrocarbon fuels. Gaseous reactants are introduced via a gas permeable plate into a slurry which includes the product and a finely divided catalyst. The liquid product is separated from the remainder of the slurry by means of a filter unit including a filter member. A pressure differentia...