Class / Patent application number | Description | Number of patent applications / Date published |
526344000 | From vinyl chloride | 10 |
20090149619 | PROCESS FOR THE PURIFICATION FROM HEAVY METALS OF VINYL CHLORIDE POLYMERS - Process for the purification of a vinyl chloride polymer (PVC) comprising at least one compound of a heavy metal, according to which: (a) the PVC is dissolved in a water-miscible polar organic solvent; (b) an aqueous solution comprising a reagent, which is either a base capable of reacting with the compound of the heavy metal (R1) or a dispersing agent capable of stabilizing the said compound (R2), is added to the organic solution, the water being introduced in an amount (Q) such that it brings about the formation of a two-phase medium, the continuous phase of which is the organic phase; (c) the two-phase medium is subjected to stirring for a time sufficient for the reagent to be able to interact with (exert its effect on) the compound of the heavy metal; (d) the precipitation of the PVC out of this two-phase medium is brought about. | 06-11-2009 |
20090203868 | PROCESS FOR THE PURIFICATION OF VINYL CHLORIDE POLYMERS (PVC) FROM HEAVY METALS - Process for the purification of a vinyl chloride polymer (PVC) comprising at least one compound of a heavy metal, according to which: (a) the PVC is dissolved in a solvent; (b) the solution is treated with at least one additive capable of adsorbing or of forming complexes with the compound of the heavy metal; (c) the solution treated is subjected to centrifuging, so as to precipitate the adsorbed or complexed compound of the heavy metal; and (d) the precipitate is separated from the PVC solution. | 08-13-2009 |
20090270579 | Process for the Manufacture of 1,2-Dichloroethane - Process for the manufacture of 1,2-dichloroethane (DCE) starting from a stream of ethane which is subjected to a catalytic oxydehydrogenation (ODH) producing a gas mixture containing ethylene, then dried and subjected to an absorption to be separated into a fraction enriched with the compounds that are lighter than ethylene containing some of the ethylene conveyed to a chlorination reactor in which most of the ethylene is converted to DCE, and into a fraction F1. Fraction F1 is then subjected to a desorption to be separated into a fraction enriched with ethylene conveyed to an oxychlorination reactor in which most of the ethylene is converted into DCE, and into a fraction F3. | 10-29-2009 |
20090326179 | Process for the manufacture of 1,2-Dichloroethane - Process for the manufacture of 1,2-dichloroethane (DCE) starting with a hydrocarbon source which is subjected to a cracking thus producing a mixture of cracking products then subjected to treatment steps to obtain a mixture of products containing ethylene. The mixture is afterwards subjected to a first separation step into a fraction enriched with the compounds that are lighter than ethylene containing some of the ethylene conveyed to a chlorination reactor in which most of the ethylene is converted to DCE, and into a fraction F1 which is subjected to a second separation step into a fraction F2 and into a heavy fraction. Fraction F2 is afterwards subjected to a third separation step into a fraction enriched with ethylene conveyed to an oxychlorination reactor in which most of the ethylene is converted to DCE, and into a fraction F3 mainly composed of ethane. | 12-31-2009 |
20140121346 | PROCESS AND APPARATUS FOR SUPERSONIC COLLISION SHOCKWAVE REACTION MECHANISM FOR MAKING CHEMICAL COMPOUNDS - A novel process and apparatus is disclosed for performing chemical reactions. Highly compressed gaseous streams such as H | 05-01-2014 |
20140329983 | Process for the manufacture of vinyl chloride monomer (VCM) and of polyvinyl chloride (PVC) - Process for the manufacture of vinyl chloride monomer (VCM), comprising step 1): subjecting 1,2-dichloroethane (EDC) to pyrolysis in order to generate a gas mixture comprising VCM, hydrochloric acid (HCl), and EDC; step 2): quenching and/or cooling and/or condensing such gas mixture to a liquid+gas mixture; step 3): subjecting such liquid+gas mixture to a first separation step to remove substantially all the HCl from the liquid+gas mixture so as to leave a stream consisting substantially of VCM and EDC; and step 4): subjecting such VCM+EDC stream to a second separation step so as to get a stream of substantially pure VCM and a stream of unconverted EDC, wherein a heat exchanger is used to heat up the VCM+EDC stream prior to being fed to a distillation column in step 4), such heat exchanger being powered by a stream of hot fluid available in any one of steps 2) to 4) of the process. | 11-06-2014 |
20160108529 | ELECTROCHEMICAL HYDROXIDE SYSTEMS AND METHODS USING METAL OXIDATION - There are provided methods and systems for an electrochemical cell including an anode and a cathode where the anode is contacted with a metal ion that converts the metal ion from a lower oxidation state to a higher oxidation state. The metal ion in the higher oxidation state is reacted with hydrogen gas, an unsaturated hydrocarbon, and/or a saturated hydrocarbon to form products. | 04-21-2016 |
526344100 | Bulk or mass polymerization of vinyl chloride only | 1 |
20160038910 | APPARATUS FOR MASS POLYMERIZATION OF VINYL CHLORIDE RESIN AND METHOD FOR MASS POLYMERIZATION OF VINYL CHLORIDE RESIN - Disclosed are an apparatus for mass polymerization of a vinyl chloride resin which may suppress generation of abnormal products (fine-particle products, oversize-particle products, lumpy products due to coagulation, etc.) and a vinyl chloride resin, which causes formation of a poor sphere, and may enhance quality and processability of a vinyl chloride resin, by addressing the problem that an average distance between resin particles is decreased as polymerization proceeds, and thus, microparticles are generated due to excessive coagulation or friction between particles, and a method of mass-polymerizing the vinyl chloride resin. The method comprises additionally inputting a monomer to a reactor in which a monomer and an initiator are contained when a ratio of the monomer converted to a polymer is 30% to 70%. | 02-11-2016 |
526344200 | Polymerization of vinyl chloride only in an aqueous medium | 2 |
20120123077 | VINYL CHLORIDE RESIN WITH LOW VISCOSITY FOR FOAMING APPLICATION AND METHOD OF PREPARING THE SAME - Provided are a vinyl chloride-based resin formed by polymerization of vinyl chloride-based small seed particles having an average particle diameter range of 0.15 μm to 0.5 μm prepared by emulsion polymerization and vinyl chloride-based large seed particles having an average particle diameter range of 0.51 μm to 0.8 μm prepared by micro-suspension polymerization, in which a content ratio(weight ratio) of the large seed particles to the small seed particles is in a range of 1 to 2, and a method of preparing the vinyl chloride-based resin. Excellent low viscosity characteristics of the vinyl chloride resin at high and low shear rates may be obtained by controlling the particle size of the small seed prepared by emulsion polymerization. | 05-17-2012 |
20140316095 | VINYL CHLORIDE LATEX WITH LOW ENERGY CONSUMPTION AND METHOD FOR PREPARING THE SAME - Disclosed is a polyvinyl chloride resin latex which is prepared by polymerization using a decreased amount of polymerization water in an early polymerization stage and then additional polymerization water in a late polymerization stage, so that the polyvinyl chloride resin latex has an increased solid content and a decreased water content and thus finally remarkably reduces energy consumption in a spray drying process. | 10-23-2014 |