| Patent Number |
Title Of Patent |
Date Issued |
| 4511540 |
Exploitation of copper, nickel and cobalt by treating manganiferous matrix oxidized ores |
April 16, 1985 |
| Process for treating oxidized ores with a manganiferous matrix to recover the small quantities of copper, nickel and cobalt, which consists of attacking the aforementioned ore by means of an aqueous solution of H.sub.2 SO.sub.4 with the simultaneous injection of sulfur dioxide, at a |
| 4443306 |
Process and cell for the preparation of polyvalent metals such as Zr or Hf by electrolysis of mo |
April 17, 1984 |
| The electrolysis cell according to the invention is concerned with the preparation of Zr or Hf by electrolysis, from a molten mixture of alkali metal or alkaline earth chlorides and fluorides.It comprises a graphite collector which defines the anodic space and which is extended at the lo |
| 4392924 |
Process for controlling the permeability of diaphragms in the preparation of polyvalent metals b |
July 12, 1983 |
| The process according to the invention concerns the production of polyvalent metals such as titanium by electrolysis of molten halides.It comprises controlling the permeability of the diaphragm which separates the anolyte from the catholyte, by causing growth or re-dissolution of a depos |
| 4381976 |
Process for the preparation of titanium by electrolysis |
May 3, 1983 |
| The process which is the subject of this invention concerns the preparation of titanium by electrolysis from a bath of molten halides.It comprises effecting partial reduction of the TiCl.sub.4 which is used as the starting material in a separate reaction vessel, and then directly feeding |
| 4349512 |
Non-polluting treatment of alkaline uraniferous effluents containing SO.sub..sup.= ions |
September 14, 1982 |
| A cyclic process for the treatment of a uraniferous liquor containing, in addition to the desired metal, sodium carbonate and/or bicarbonate and sodium sulphate, obtained by the alkaline attack of a sulphur-containing uraniferous ore, the said process comprising the neutralization of the |
| 4345583 |
Water heater using solar and non-solar energy |
August 24, 1982 |
| An apparatus for the preparation of hot water using solar energy and non-solar auxiliary energy. Solar heated water in a reservoir is provided for utilization if it is at least at a desired temperature. If the solar heated water is not sufficiently hot, an auxiliary gas heater is used to |
| 4319935 |
Superplastic metal alloys having a high deformation rate |
March 16, 1982 |
| Superplastic metal alloys having a high defromation rate are disclosed. Their structure is characterized by the presence of at least two principal constituents, the major one of which is of a particulate globular or elongated shape while the minor one surrounds the first completely or |
| 4309982 |
Process and apparatus for the preparation of hot water from solar energy |
January 12, 1982 |
| A process for preventing freezing of solar collectors by automatic drainage of the water or liquid working fluid contained within the collectors the working fluid is drained from the collector, but remains within the closed solar collector circuit. Apparatus responsive to the pressure ex |
| 4305911 |
Non-polluting treatment of uraniferous effluents originating from an alkaline attack of a sulphu |
December 15, 1981 |
| A cyclic process for the treatment of a uraniferous liquor containing, in addition to the desired metal, sodium carbonate and/or bicarbonate and sodium sulphate, obtained by the alkaline attack of a sulphur-containing uraniferous ore, the said process comprising fixing the uranium over a |
| 4276327 |
Process for depositing alumina onto a substrate and alumina regeneration |
June 30, 1981 |
| A process for the concurrent deposition and regeneration of alumina onto a substrate from an aqueous sodium aluminate solution comprising immersing the substrate in an aqueous sodium aluminate solution of which the composition is controlled and adjusted by passage through a regeneration |
| 4165732 |
Process and apparatus for obtaining hot water by use of solar energy |
August 28, 1979 |
| A process and an apparatus for preparation of hot water, using solar energy is set forth. In the process, the water is made to circulate successively in two reservoirs connected in series, and the water is heated from solar energy in one reservoir while the second reservoir can be heated |
| 4102740 |
Moderator structure for the core of a molten salt reactor |
July 25, 1978 |
| The moderator structure is placed within a core space limited by a bottom wall, a top wall and a lateral reflector and is constituted by a stack of prismatic or spherical nodules applied in mutual contact in the three dimensions which prevent relative displacements of the nodules and so |
| 4090929 |
Rapid chromic acid anodization |
May 23, 1978 |
| The process which is the object of the invention concerns the surface treatment of aluminum alloys by anodization. It consists of treating the aluminum alloy objects to be coated by making them the anode in a bath through which a direct current passes, under the following operating c |
| 4069072 |
Aluminum alloy |
January 17, 1978 |
| Wrought aluminum alloy containing:Zn 6.5 to 10%Cu 4.5 to 7%Mg 0.1 to 1%Mn 0.01 to 0.5%Ti 0.01 to 0.3%The alloy is applicable to the manufacture of forged or rolled pieces. |
| 4048189 |
Lipophilic phthalocyanines |
September 13, 1977 |
| Compound of the formula: ##STR1## in which Pc represents a metallized or non-metallized phthalocyanine residue, X represents a hydrogen or alkali metal atom, one of the substituents R.sub.1 and R.sub.2 represents a linear alkyl or alkenyl residue containing 12 to 18 carbon atoms, |
| 4045286 |
Molten fuel-salt reactor |
August 30, 1977 |
| In a molten-salt reactor, a common vessel contains the reactor core, a neutron-moderating mass pierced by passages for the circulation of the fuel salt, at least one primary heat exchanger which is located close to the reactor core and through which the hot fuel salt passes after dis |
| 3993542 |
Process and apparatus for extraction of gases produced during operation of a fused-salt nuclear |
November 23, 1976 |
| The present invention relates to the field of fused-salt nuclear reactors and its object is the extraction of the gases produced in the course of operation of these reactors.The process according to the invention consists in placing into position a piece of material permeable for gases a |
| 3943122 |
Polyazo compounds containing benzhydrol as a component |
March 9, 1976 |
| Azo dyestuffs of the formula: ##SPC1##In which n is zero or 1, R represents a hydrogen atom or an alkyl or aryl group, A.sub.1, A.sub.2 and A.sub.3 each represent the residue of a diazotisable aromatic primary amine, which may be the same or different with at least one of these resid |
| 3932404 |
Process for making pyrazines from 2-aza-1,3-butadienes |
January 13, 1976 |
| Process for the preparation of an amino-pyrazine falling within the formula: ##SPC1##In which R.sub.1 and R.sub.2 each represent a hydrogen atom, or an alkyl or aryl group, or together with the carbon atoms of the pyrazine ring form a cyclic hydrocarbon having 5 to 7 carbon atoms, an |
