| Patent Number |
Title Of Patent |
Date Issued |
| 4446031 |
Sewage treatment composition its manufacture and use |
May 1, 1984 |
| In so-called rising main sewers in which sewage can be subjected to conditions when the supply of oxygen is deficient noxious sulphides can be produced which are a nuisance. The present invention provides a composition for the treatment of sewage so that the production of noxious sul |
| 4363888 |
Bead polymerization process |
December 14, 1982 |
| A process for the preparation of rigid beads, of cross-linked polyester resin which beads may be solid or vesiculated, by forming an oil-in-water or a water-in-oil-in-water emulsion in which the oil phase contains an unsaturated polyester resin and an unsaturated organic monomer to provi |
| 4316821 |
Method for the production of catalysts |
February 23, 1982 |
| A method for the production of a monolayer catalyst by treating the catalyst substrate having bound water residues on its surface and substantially free of physisorbed water with an organic solution of a catalyst precursor, reacting the precursor with the bound water residues, removi |
| 4280849 |
Aqueous dispersions |
July 28, 1981 |
| Aqueous pastes have been prepared by dispersing dried particulate material in water in the presence of a dispersing agent.A new process for the manufacture of aqueous pastes involves two-stage filtration in which a first stage filter cake is mixed with a dispersing agent in an amount suf |
| 4279512 |
Method of measurement |
July 21, 1981 |
| A method of measuring mean particle size and/or standard deviation of particles involves illuminating a suspension of the particles with three beams of radiation of wavelengths R.sub.1, R.sub.2 and R.sub.3 and measuring the beam intensities passing through the suspension. The results |
| 4239548 |
Titanium dioxide pigment |
December 16, 1980 |
| Commercial titanium dioxide pigments to be used in paper laminates have been prepared by a method which involves calcining a coated pigment. A new pigment having an excellent stability to degradation by light when used in such laminates is produced without calcination of the coated pigme |
| 4238370 |
Oxidation catalyst and method for its manufacture |
December 9, 1980 |
| A method for the manufacture of a total oxidation catalyst in which titanium dioxide is treated with vanadium pentoxide and then washed until the wash liquid is substantially free of vanadium pentoxide. This method produces a catalyst which will totally oxidize an oxidizable organic |
| 4228038 |
Method for the preparation of catalyst of vanadium pentoxide on substrate of titanium dioxide |
October 14, 1980 |
| A method for the manufacture of a selective oxidation catalyst by heating titanium dioxide in the presence of water prior to treating the titanium dioxide with vanadium oxytrichloride in vapor form and then heating the treated titanium dioxide. This treatment with water and vanadium |
| 4211266 |
Flexible container with discharge tube |
July 8, 1980 |
| A container consisting of a flexible body, base and cover and having flexible discharge and filling tubes in the base and cover, respectively, and flaps attached to the exterior of the base; the discharge and filling tubes and flaps having releasable securing means. The container may be |
| 4208393 |
Purification process |
June 17, 1980 |
| A process for the treatment of aqueous sulphuric acid solutions containing dissolved ferrous sulphate comprising forming such a solution containing from 140 to 220 grams/liter free sulphuric acid in a first zone; adjusting the pH value of the solution in this zone to one in the range 3 t |
| 4162431 |
Method and apparatus for controlling the erosion of arc producing electrodes |
July 24, 1979 |
| Apparatus and process for reducing the rate of erosion of electrodes between which an arc is sustained by the provision of a field coil around the electrode which is supplied with direct current and the oscillation of that direct current supply at a frequency in the range 5.times.10.sup. |
| 4158123 |
Series reactor |
June 12, 1979 |
| An improved multiphase series reactor consisting of a number of interconnected coils, each coil being formed from sub-coil wherein the sub-coils consist of a number of laterally-spaced single-plane spirals, each spiral being formed from hollow electrical-conducting material. Each sub |
| 4128409 |
Chlorine recovery process |
December 5, 1978 |
| Process for the recovery of chlorine from chlorine-containing gas mixtures in a multi-stream heat exchanger wherein the chlorine-containing mixtures are separated from other gases which would solidify or liquify in the process, either before or after compression of the mixture, and is th |
| 4113757 |
Titanium compounds |
September 12, 1978 |
| A titanium chelate being the reaction product of ethylene glycol titanate, propylene glycol titanate, diethylene glycol titanate or hexylene glycol titanate and lactic acid, alpha-hydroxy-butyric acid, citric acid or glyceric acid. The chelates are particularly useful for gelling hydroxy |
| 4112035 |
Production of calcinable material |
September 5, 1978 |
| Pelletizing damp gypsum to render the gypsum easily calcinable by a process in which the damp gypsum is agitated, and when moisture is observed at the surface of the forming pellets a dry powdered compound of calcium is added until the forming pellets are coated with the powdered compoun |
| 4083538 |
Closure means |
April 11, 1978 |
| A pressure vessel base closure means including a pair of flat disc-like members spaced apart by a peripheral outer cylindrical member and an inner perforated cylindrical member, and there being provided between the two flat disc-like members a plurality of radially directed ribs to provi |
| 4076413 |
Apparatus and method for producing colored reproductions of black and white negatives |
February 28, 1978 |
| Apparatus for use in the production of a colored photographic reproduction of a black and white negative which consists essentially of a light-free enclosure, a baffle having an aperture and extending across the housing with means to mount the black and white negative over the aperture, |
| 4076200 |
Supported vessel and means for support thereof |
February 28, 1978 |
| A supported vessel having a number of outwardly directed projections on the side of the vessel which are fixed to the outer end of horizontally disposed webs, the inner end of the webs being supported on a supporting structure, the lower end of which is secured in the ground, the weight |
| 4053577 |
Process for the gaseous phase production of metal oxide particles |
October 11, 1977 |
| Process and apparatus for the production of finely-divided metal oxides by the oxidation of the corresponding metal halide wherein a secondary gas is introduced into a heated primary gas through apertures in the reaction zone wall, the apertures formed with at least two different cro |
| 4052900 |
Transducers |
October 11, 1977 |
| A transducer having a primary coil and at least one secondary coil wound on a hollow support with a number of electrically conducted links axially spaced along the secondary coil with the links connecting spaced turns of the secondary coil so that the transducer when in use has an output |
| 4052224 |
Treatment of pigment |
October 4, 1977 |
| A process for the treatment of titanium dioxide pigment which involves adding to a pigment slurry a compound of phosphorus, of aluminium, of zirconium, of titanium and of silicon, adjusting the pH of the slurry to a value of from 3.5 to 4.5, followed by adding to the slurry a compound of |
| 4052223 |
Treatment of pigment |
October 4, 1977 |
| A process for the production of the highly durable titanium dioxide pigment in which the pigment is coated with a phosphate, a silicate and a hydrous oxide of zirconium and aluminium in specified carefully controlled amounts and order of deposition. |
| 4052222 |
Treatment of pigment |
October 4, 1977 |
| A process for the treatment of titanium dioxide pigment in which there is added to a slurry of the pigment a compound of silicon, of aluminium, of zirconium and of titanium, changing the pH of the slurry to 7.5 to 8.5 prior to adding a compound of silicon, an acidic compound of aluminium |
| 4023597 |
Distributors |
May 17, 1977 |
| A gas distributor tube formed from a non-porous ceramic material having a generally axial passageway at least part of which is in the form of a helix. A treatment chamber or reactor is provided with a number of distributor tubes located in the base of the chamber to permit the introd |
| 4013782 |
Process for the oxidation of a metal halidein the vapor phase |
March 22, 1977 |
| Apparatus and process suitable for oxidising a metal halide in the vapor phase wherein at least part of the wall of the reaction zone is formed from crimped annular plates separated by uncrimped annular plates to form orifices through which at least one of the reactants can be introduced |
| 4012338 |
Process for manufacturing a carrier of titanium dioxide |
March 15, 1977 |
| A carrier for a catalyst which is composed of particulate titanium dioxide having a hardness of at least 40, a bulk density of at least 0.8 grams per milliliter and a specific area of less than 5 square meters per gram. The carrier is particularly useful for supporting enzymes or vanadiu |
| 4012201 |
Reactor |
March 15, 1977 |
| Apparatus suitable for oxidizing a metal halide in the vapor phase wherein at least part of the wall of the reaction zone is formed from crimped annular plates separated by uncrimped annular plates to form orifices through which at least one of the reactants can be introduced into the |
| 4006080 |
Process for the treatment of acidic waste liquid containing dissolved salts |
February 1, 1977 |
| A process for the treatment of aqueous sulphuric acid solutions of a metal salt or salts containing ferrous sulphates wherein the pH value of the solution is adjusted by the addition of a calcium compound to selectively precipitate calcium sulphate after which the precipitated calcium su |
| 4004935 |
Glazing compositions for ceramic articles |
January 25, 1977 |
| A glazed ceramic article in which the glaze includes titanium dioxide at least some of which is in the form of a metal titanate or a metal titano silicate and having a gloss of from 9 to 55 units at 45.degree. illumination. Also a glazing composition is described prepared by a semi-f |
