| Patent Number |
Title Of Patent |
Date Issued |
| 4311614 |
Catalysts for water dealkylation of aromatic hydrocarbons |
January 19, 1982 |
| A water dealkylation catalyst of aromatic hydrocarbons containing at least one metal of Group VIII and eventually, one metal of group VII.sub.b deposited on a gamma alumina of special properties containing at least 1000 ppm of sulfate ions having undergone a pre-treatment in aqueous |
| 4264334 |
Heavy fuel-oil compositions having an improved stability under storage conditions |
April 28, 1981 |
| Heavy fuel-oil composition of improved stability under storage conditions, comprising a petroleum residue obtained from a straight run distillation, a vacuum distillation or a viscosity reduction of petroleum materials, a diluent such as a steam-cracking residue, a viscosity reduction ga |
| 4242246 |
Process for the preparation of bituminous compositions making use of a mother solution containin |
December 30, 1980 |
| This invention relates to a new process for the preparation of improved polymeric bitumens.The process is characterized by preparing a first composition by admixing a petroleum fraction (160.degree.-230.degree. C.), while stirring, at a temperature of from 80.degree. C. to 120.degree. C. |
| 4242143 |
Process for improving the properties of bituminous products and an improved cast asphalt |
December 30, 1980 |
| A process for improving the properties of a bitumen which comprises mixing the bitumen with from about 5 to 20% by weight based on the bitumen, of a polyolefin wax at an elevated temperature for a period of time necessary to form a homogeneous mixture. The modified bitumen is particularl |
| 4238368 |
Water dealkylation catalyst of aromatic hydrocarbons |
December 9, 1980 |
| Catalyst for water dealkylation of oil fractions containing monoalkylated or polyalkylated aromatic hydrocarbons, said catalyst containing at least one metal of group VIII in a proportion of 0.1 to 5% by weight on a carrier, characterized in that said carrier is a zeolite L that can be |
| 4237052 |
Method for the preparation of bitumens modified by polymers |
December 2, 1980 |
| A process for the preparation of bitumen-polymer compositions, characterized by the fact that the bitumens are modified by grafting of a dihalopolybutadiene polymer that serves as a receptive structure to block polymers and to elastomers co-vulcanizable with the grafted bitumen.The elast |
| 4233186 |
Catalysts for water dealkylation of aromatic hydrocarbons |
November 11, 1980 |
| Water dealkylation catalysts of petroleum fractions containing monoalkylated or polyalkylated aromatic hydrocarbons including at least one metal of group VIII deposited in a proportion of from 0.1 to 5% by weight on a spinel, and having deposited in a proportion of from 0.1 to 5% by |
| 4221259 |
Process for storing calories |
September 9, 1980 |
| A process for storing heat in the form of fusion/solidification latent heat which comprises passing a thermo-conductive fluid into a thermally insulated storage element containing a substance having a melting point that corresponds to the supply and heat consumption temperatures, cha |
| 4206044 |
Catalytic process for hydro-treating gas oils in the presence of hydrogen |
June 3, 1980 |
| The invention is directed to a catalytic process for hydro-treating gas oils in order to improve their flow properties, the feed stock being treated at a temperature of between 400.degree. and 550.degree. C., under a total pressure of between 18 and 60 bars with a hydrogen/hydrocarbon |
| 4206037 |
Catalytic treatment of gas oils |
June 3, 1980 |
| The invention relates to the catalytic treatment of a gas oil feed stock, distilling between 150.degree. and 530.degree. C., in a reactor zone whose temperature is comprised between 200.degree. and 500.degree. C., the pressure is comprised between 15 and 80 bars and containing a hydrogen |
| 4201193 |
Solar energy absorbing roof |
May 6, 1980 |
| A roof structure has a supporting base on which a layer of insulating material is placed and over which is a metal layer having water circulating channels. The metal layer is covered by a water proofing layer, the outer surface of which is covered with mineral particles. The roof str |
| 4191702 |
Preparation of alkyl or aralkyl thiosulfates |
March 4, 1980 |
| Process for obtaining alkyl- and arylalkylthiosulfates in a water-organic solvent two-phase system by nucleophilic substitution of the halogen of an alkyl or arylalkyl halide by a thiosulfate ion, characterized by the fact that the substitution is effected in the presence of a phase tran |
| 4182296 |
Apparatus permitting an improvement of the carburetion of internal combustion engines |
January 8, 1980 |
| Apparatus permitting an improvement of the carburetion of internal combustion engines fitted downstream of a multibody carburetor and upstream of the induction manifold.The primary homogenization chamber forming an extension of the primary body issues tangentially via an orifice into the |
| 4165631 |
Instrument for the continuous measurement of viscosity, especially of bitumens |
August 28, 1979 |
| The instrument comprises a viscometer for a product such as bitumen and a pump for transferring the product to a flat wall-type heat exchanger. A channel formed in the heat exchanger wall is brought to an adjustable temperature and the channel output is connected to the viscometer. A pro |
| 4164490 |
Bitumen compositions containing polymers |
August 14, 1979 |
| The invention is related to new bitumen compositions having improved rheological properties.The compositions are characterized in that they contain:90 to 99.9% in weight of a bitumen, its softening point being comprised between 20.degree. and 120.degree. C.,0.1 to 10% in weight of a norborne |
| 4154710 |
Method of preparing novel bitumen compositions |
May 15, 1979 |
| A method of preparing novel bitumen compositions which comprises a first step wherein an olefinic unsaturated organic compound having a molecular weight varying between 300 and 30,000 is added to a bitumen having a penetration value varying between 30 and 220, and a second step wherein a |
| 4145322 |
Process for preparing bitumen-polymer compositions |
March 20, 1979 |
| The present invention is related to a novel process for preparing bitumen-polymer compositions. These compositions contain block copolymers comprising diene and styrene groups.The compositions present excellent mechanical properties even at low temperatures. |
| 4104320 |
Method of dehydrocyclizing aliphatic hydrocarbons |
August 1, 1978 |
| This invention relates to a method of dehydrocyclizing aliphatic hydrocarbons to form corresponding aromatic hydrocarbons. According to the invention, a batch of aliphatic hydrocarbons, in the presence of hydrogen at a temperature of 430.degree. to 550.degree. C is passed over a catalyst |
| 4096908 |
Heating and cooling enclosure for a gas chromatographic column |
June 27, 1978 |
| The enclosure comprises an insulating and demountable sealed box unit fitted with a closure lid and placed around a chromatographic column consisting of a metal tube of constant cross-section, said tube being arranged in the form of a helix and supplied with electric heating current |
