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| Number | Title | Issue Date |
| 7488853 | Process for producing phenols A process for producing a phenol, which comprises the following steps of: (1) oxidizing an alkylbenzene with an oxygen-containing gas to obtain an oxidation reaction mixture containing a hydroperoxide; (2) subjecti... | 02/10/2009 |
| 7326815 | Selective oxidation of alkylbenzenes The present invention relates to a process for producing phenol and a ketone of general formula R1COCH2R3 (I), in which R1 and R2 each independently represent an alkyl group having from 1 to 4 carbon atoms, said... | 02/05/2008 |
| 7282613 | Process for producing phenol and methyl ethyl ketone A process for producing phenol and methyl ethyl ketone (MEK). ... | 10/16/2007 |
| 7205442 | Method of making high purity phenol A method of manufacturing a phenol product having a reduced concentration of a contaminating reaction by-product. The method includes contacting a phenol stream, having a concentration of the contaminating by-product, by contacting the phenol stream with an acidic c... | 04/17/2007 |
| 7141703 | Process for producing phenol and ketone using neutralizing base Improved processes for oxidizing alkylbenzene(s) to produce phenol and ketone product(s) using neutralizing base. ... | 11/28/2006 |
| 7102036 | Process and catalyst for purifying phenol The goal of this invention is to produce phenol of high purity by conversion of impurities that are present in the starting phenol, which is produced by the decomposition of cumyl hydroperoxide. The indicated goal is achieved by purifying the phenol containing admix... | 09/05/2006 |
| 7067680 | Process for preparing organic hydroperoxide having a reduced amount of contaminants A process for preparing organic hydroperoxide having a reduced content of contaminants, which process involves: (a) oxidation of an organic compound to obtain reaction product containing an organic hydroperoxide; (b) contacting at least par... | 06/27/2006 |
| 7034192 | Method for removal of acetol from phenol A method is provided for the efficient, low cost removal of acetol from a phenol stream. The method results in removal of substantially all of the acetol from the phenol stream without the formation of substantial amounts of additional methylbenzofuran. The method a... | 04/25/2006 |
| 7019180 | Method of purifying phenol A method of purifying a phenol stream that contains a concentration of a contaminating compound is provided. The phenol stream is treated or purified by contacting the stream, under suitable process conditions, with a treatment catalyst that has a low silica content... | 03/28/2006 |
| 7012255 | Method of measuring the concentration of hydroperoxides of alkylaromatic hydrocarbons A method for measuring a concentration of a hydroperoxide of an alkylaromatic hydrocarbon in a process stream comprises immersing a probe into the process stream; wherein the probe is coupled to a spectrometer; collecting absorption data with the spectrometer at a w... | 03/14/2006 |
| 7002048 | Method for removal of acetol from phenol A method is provided for the efficient, low cost removal of acetol from a phenol stream. The method results in removal of substantially all of the acetol from the phenol stream without the formation of substantial amounts of additional methylbenzofuran. The method a... | 02/21/2006 |
| 6984761 | Co-production of phenol, acetone, α-methylstyrene and propylene oxide, and catalyst therefor A process is disclosed for producing α-methylstyrene, acetone, and phenol wherein the amount of α-methylstyrene produced may be controlled by selectively converting a portion of the cumene hydroperoxide to dimethyl phenyl carbinol, the hydrated form of α-methylst... | 01/10/2006 |
| 6965056 | Removal of salts in the manufacture of phenolic compound There is provided a process for the manufacture of phenolic compounds by separating a neutralized aralkyl hydroperoxide cleavage mass stream containing salts of neutralization into a crude ketone stream and a crude phenolic stream containing the salts of neutralizat... | 11/15/2005 |
| 6956136 | Method of producing cumene hydroperoxide The specification provides a method of producing cumene hydroperoxide by continuous aqueous-emulsion oxidation at a high temperature and pressure in a cascade of reactors, wherein the process is conducted in the presence of a mixture of an aqueous solution of an amm... | 10/18/2005 |
| 6824687 | Extraction of phenol from wastewater A method is provided herein for the extraction of phenol from a waste water stream. The method is used in conjunction with a process for producing acetone and phenol from cumene. The method for extracting phenol from waste water includes contacting in a countercurre... | 11/30/2004 |
| 6825387 | Low sodium cleavage product Washed cleavage product (WCP) in a phenol manufacturing process is treated to remove sodium ions. The WCP is contacted with a cation exchange resin in hydrogen form, and then with anion exchange resin in free base or hydroxide form, to produce a WCP essentially free... | 11/30/2004 |
| 6720461 | Removal of salts in the manufacture of phenolic compound There is provided a process for the manufacture of phenolic compounds by separating a neutralized aralkyl hydroperoxide cleavage mass stream containing salts of neutralization into a crude ketone stream and a crude phenolic stream containing the salts of neutralizat... | 04/13/2004 |
| 6657087 | Process and apparatus for the work-up by distillation of cleavage product mixtures produced in the cleavage of alkylaryl hydroperoxides The present invention claims a process and an apparatus for the work-up by distillation of cleavage product mixtures produced in the cleavage of alkylaryl hydroperoxides. Usually, in the work-up by distillation of cleavage product mixtures which are produ... | 12/02/2003 |
| 6635789 | Production and purification of phenol A process for separating sulfonic acid compounds from a phenolic solvent is provided by contacting the phenolic solvent with a hydrotalcite-type material (HTM). The process can be applied in the conventional industrial process for converting cumene to phe... | 10/21/2003 |
| 6630608 | Process for preparing phenols The present invention relates to a process for preparing phenols, in which the pH of the reaction product from the acid-catalyzed cleavage of alkylaryl hydroperoxides is set to a value of at least 8 at a temperature of at least 100° C. prior to the work-... | 10/07/2003 |
| 6620980 | Method for recovery of phenol from aqueous streams An improved method for the recovery of phenol from aqueous streams comprises adding a relatively non-polar solvent to a phenol containing aqueous stream to improve the separation of the phenol form the aqueous stream. The improvement results in a phenol s... | 09/16/2003 |
| 6583326 | Process for separating phenol from a mixture comprising at least hydroxyacetone, cumene, water and phenol Phenol is separated from a mixture containing hydroxyacetone, cumene, water and phenol, by fractionating the mixture in a process with a fractional distillation step and a phase separation step to provide a single phenol fraction containing less than 300 ... | 06/24/2003 |
| 6576798 | Method and system for purifying cumene hydroperoxide cleavage products A system for purifying a cumene hydroperoxide cleavage product mixture comprises a cumene hydroperoxide cleavage product mixture feed containing impurities in fluid communication with an aqueous alkaline solution feed; the cumene hydroperoxide cleavage pr... | 06/10/2003 |
| 6573408 | System and method for purifying cumene hydroperoxide cleavage products A system for purifying a cumene hydroperoxide cleavage product mixture comprises a cumene hydroperoxide cleavage product mixture feed containing impurities in fluid communication with an aqueous alkaline solution feed; the cumene hydroperoxide cleavage pr... | 06/03/2003 |
| 6489519 | Process for removal of impurities from phenol by means of at least one acid catalyst Impurities are removed from phenol by a process, comprising: first treating phenols containing impurities with at least one acid catalyst which converts the impurities into compounds which can be separated from phenol; separating the acid treated phenol from t... | 12/03/2002 |
| 6489518 | Process for reducing the salt content of fractions comprising high boilers obtained in the preparation of phenol from cumene, by extraction A process for reducing the salt content of fractions comprising high boilers obtained in the preparation of phenol from cumene, by extraction, is claimed. In the preparation of phenol from cumene, not only phenol and acetone but also by-products such as d... | 12/03/2002 |
| 6486365 | Production and purification of phenol: hydroxyacetone removal by hydrotalcite A process for converting carbonyl-type impurities contained in a phenolic solvent to high-boiling derivatives is provided by contacting the phenolic solvent with a hydrotalcite-type material (HTM). The phenol can be separated from the high-boiling derivat... | 11/26/2002 |
| 6441252 | Apparatus for producing phenol using reactive distillation An apparatus for producing phenol and acetone from cumene hydroperoxide comprises a reactive distillation column comprising at its upper portion a distillation column and at its lower portion a catalyst bed.... | 08/27/2002 |
| 6441251 | Production of phenol A process for producing phenol and acetone from cumene hydroperoxide is described in which the cumene hydroperoxide is contacted with a solid-acid catalyst comprising an inorganic, porous, crystalline material, designated as M41S, exhibiting, after calcin... | 08/27/2002 |
| 6433232 | Process for producing hydroxyaromatic compound A process for producing a hydroxyaromatic compound by oxidizing an alkyl group-substituted aromatic hydrocarbon to a hydroperoxyaromatic compound and decomposing the hydroperoxyaromatic compound to the hydroxyaromatic compound in which the step of neutral... | 08/13/2002 |
| 6410804 | Production of phenol using reactive distillation A process for producing phenol and acetone from cumene hydroperoxide comprises: i) introducing a cumene hydroperoxide feed into a reactive distillation column comprising at its upper portion a distillation column and at its lower portion a catalyst bed, a... | 06/25/2002 |
| 6388144 | Method for reducing methylbenzofuran levels in high purity phenol A process for treating phenol with a strong acid ion exchange resin to reduce the level of methylbenzofuran is provided. The process is capable of being carried out at elevated temperatures for extended periods, such that cooling of the phenol from distil... | 05/14/2002 |
| 6297406 | Production of phenol A process for producing phenol and acetone from cumene hydroperoxide is described in which the cumene hydroperoxide is contacted with a solid-acid catalyst comprising a mixed oxide of cerium and a Group IVB metal.... | 10/02/2001 |
| 6201157 | Method for production of phenol and acetone by decomposition of cumene hydroperoxide An improved method for production of phenol and acetone by decomposition of cumene hydroperoxide in the presence of an acidic catalyst to phenol and acetone, wherein the improvement comprises neutralization of the acidic catalyst after substantial complet... | 03/13/2001 |
| 6180834 | Process for the extraction of the salts contained in the neutralized separated product obtained in the preparation of phenol by the oxidation of cumene Process for the extraction of the salts contained in the neutralized separated product obtained in the preparation of phenol by the oxidation of cumene, wherein the flow-rate of the aqueous stream of the separation section of cumene hydroperoxide is reduc... | 01/30/2001 |
| 6169216 | Production of phenol A process for producing phenol and acetone from cumene hydroperoxide is described in which the cumene hydroperoxide is contacted with a solid-acid catalyst comprising a sulfated transition metal oxide, preferably sulfated zirconia.... | 01/02/2001 |
| 6169215 | Production of phenol A process for producing phenol and acetone from cumene hydroperoxide is described in which the cumene hydroperoxide is contacted with a solid-acid catalyst produced by calcining a source of a Group IVB metal oxide with a source of an oxyanion of a Group V... | 01/02/2001 |
| 6066767 | Method of purifying cumene hydroperoxide decomposition products from hydroxyacetone and from other carbonyls Purification of cumene hydroperoxide cleavage products from hydroxyacetone and carbonyl compounds is accomplished via extraction of hydroxyacetone and carbonyl compounds from cleavage products with a circulating water-salt solution in an extractor during ... | 05/23/2000 |
| 6057483 | High selective method of phenol and acetone production Disclosed is a process for the cleavage of technical cumene hydroperoxide (CHP) into phenol, acetone and -methylstyrene. In a first stage, the CHP cleavage process is conducted in such a way to maintain the heat generation rate and the heat removal... | 05/02/2000 |
| 6034282 | Method of phenol tar desalting A method for reduction of salt content in phenol tars with no additional solvent which washes the tars with water alone in a countercurrent flow extractor and substantially reduces the level of salt in the tar.... | 03/07/2000 |
