Class / Patent application number | Description | Number of patent applications / Date published |
570262000 | Purification or recovery | 11 |
20080234526 | Trityl chloride recovery - Methods of recovering a triarylmethyl halide from a sucrose derivatization process include the steps of
| 09-25-2008 |
20080293979 | Process for the Regeneration of Sulfuric Acid - Sulfuric acid contaminated with byproducts of chloromethane scrubbing is regenerated for reuse in the scrubbing process by diluting with water to not lower than about a 55 weight percent concentration, heating the diluted acid to boiling at not more than about 135° C., concentrating the acid to a concentration of minimally 80 weight percent at a temperature of at least 170° C., and reacting the concentrated acid with an oxidizing agent. | 11-27-2008 |
20090240091 | SEPARATION AND/OR RECOVERY OF PROPYL BROMIDE - Described is a process for separating an organic phase comprising mainly propyl bromide from a crude reaction mixture formed by free-radical catalyzed hydrobromination of propylene with hydrogen bromide. The process comprises (A) feeding cold water into an upper or mid-portion of a packed column; (B) concurrently feeding the crude reaction mixture into an upper portion and/or mid-portion of the column so that the water contacts the crude reaction mixture; to form a mixture of (i) an acidic aqueous phase comprising aqueous hydrogen bromide and (ii) an organic phase comprising propyl bromide; (C) withdrawing the resultant phases from said column, at a rate comparable to the feeds being made into the column; and (D) separating the phases to form an upper acidic aqueous phase comprising aqueous hydrogen bromide superposed on a lower liquid organic phase comprising propyl bromide, and separating these upper and lower phases from each other. | 09-24-2009 |
20090270663 | METHOD FOR GRIGNARD TYPE REACTIONS IN MICROREACTORS - The present invention relates to a process for Grignard type reactions comprising mixing at least two fluids in a microreactor having at least two injection points. | 10-29-2009 |
20100228061 | CATALYST FOR REMOVING DETRIMENTAL HYDROCARBONS PRESENT IN EFFLUENT OR PROCESS GASES - The invention relates to a catalyst for the removal of detrimental halogenated and non-halogenated hydrocarbons in different effluent or process gases. The invention also relates to a method for the manufacture and use of such a catalyst. The catalyst of the invention includes a porous support material, on the surface of which there are one or several noble metals, V, and one or several 1. additives chosen from the group of Cr, Mn, Fe, Co and Ni. | 09-09-2010 |
20100331584 | METHOD FOR RECOVERY OF HALOGENATED HYDROCARBONS - Recovery of a halogenated hydrocarbon is performed by removing the halogenated hydrocarbon from an accompanying gas and/or temporarily storing the halogenated hydrocarbon on sorption filters, and releasing the halogenated hydrocarbon in targeted manner. The halogenated hydrocarbon serves for removal of an expiration gas using a steam carrier. A flow of the halogenated hydrocarbon takes place through two sorbents, (1) a hydrophobic carbon molecular sieve and (2) a hydrophobic zeolite, in two sorbent beds, spatially following one another. Air mixed with steam or steam has a temperature of the gases between 90° C. and 100° C. at normal pressure. In a filter for carrying out theabove recovery method, two filter beds are disposed to spatially follow one another. | 12-30-2010 |
20110112342 | METHODS OF REMOVING IMPURITIES FROM ALKYL BROMIDES DURING DISTILLATION AND DISTILLATE PRODUCED THEREIN - Methods are provided for removing impurities from compositions comprising alkyl bromide. Such methods comprise combining such composition with at least one nonvolatile epoxide during distillation to purify the alkyl bromide. Ultra pure alkyl bromide compositions are also provided. | 05-12-2011 |
20110257445 | PROCESS FOR SEPARATING CHLORINATED METHANES - The present invention relates to a process for separating chlorinated methanes utilizing a dividing wall column. Processes and manufacturing assemblies for generating chlorinated methanes are also provided, as are processes for producing products utilizing the chlorinated methanes produced and/or separated utilizing the present process(es) and/or assemblies. | 10-20-2011 |
20110313217 | Methyl iodide removal from acetic acid waste stream - The invention is a method of removing methyl iodide from an alkane distillation bottoms stream of an acetic acid production process. The method comprises contacting the alkane distillation bottoms stream in the liquid phase with a phosphine or a phosphine-functionalized support, and recovering a treated alkane distillation bottoms stream having a reduced methyl iodide content. | 12-22-2011 |
20140275662 | PROCESS TO SUPPRESS THE FORMATION OF 3,3,3-TRIFLUOROPROPYNE IN FLUOROCARBON MANUFACTURE - This invention relates to a process for the suppression of 3,3,3-trifluoropropyne during the manufacture of fluorocarbons, fluoroolefins, hydrochlorofluoroolefins. More particularly, this invention is directed to a process to suppress the formation of 3,3,3-trifluoropropyne during processes for the manufacture of HCFO-1233zd(E), HCFO-1233zd(Z), HFO-1234ze(E), and/or HFO-1234ze(Z). | 09-18-2014 |
20140336426 | PROCESS AND APPARATUS FOR HEAT RECOVERY IN VINYL CHLORIDE MONOMER PLANTS OR IN INTEGRATED VINYL CHLORIDE MONOMER OR POLYVINYL CHLORIDE PLANTS - Disclosed is a process and apparatus for heat recovery in vinyl chloride monomer manufacturing plants or in integrated vinyl chloride monomer/polyvinyl chloride manufacturing plants. A process for capture and use of excess heat recovered in the production of vinyl chloride includes distillatively purifying DCE in a high-boilers column, using a heat exchanger to capture thermal energy from a purified DCE vapor stream from the high-boilers column, generating low pressure steam from the captured thermal energy, returning condensed DCE vapors to the high-boilers column, and heating parts of the plant with the generated low pressure steam. | 11-13-2014 |