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| Number | Title | Issue Date |
| 8173853 | Process for preparing acetylene by partial oxidation of hydrocarbons A process is proposed for continuously operating a plant for preparing acetylene from hydrocarbons by partial oxidation, cleavage in an arc or pyrolysis of hydrocarbons to obtain a reaction gas mixture which is conducted through one or more compressors, the pressure... | 05/08/2012 |
| 8115042 | Oligomerisation of olefins In the oligomerization of olefins in a tubular reactor employing a molecular sieve catalyst, the temperature of the reaction is monitored and the space velocity of the olefin feed to the reactor is reduced as the temperature increases. This has been found to increas... | 02/14/2012 |
| 7754932 | Monitoring and control of processes for making 1-hexene Processes, methods and apparatus relating to olefin oligomerization include the use of Raman spectrometry to monitor the concentration of reactants, products or other chemical components. One or more oligomerization conditions are adjusted in response to those monit... | 07/13/2010 |
| 7396970 | Monitoring and control of processes for making 1-hexene Processes, methods and apparatus relating to olefin oligomerization include the use of Raman spectrometry to monitor the concentration of reactants, products or other chemical components. One or more oligomerization conditions are adjusted in response to those monit... | 07/08/2008 |
| 7238847 | Apparatus and method for determining and controlling the hydrogen-to-carbon ratio of a pyrolysis product liquid fraction A process and apparatus for determining the hydrogen-to-carbon ratio of the liquid fraction of a pyrolysis product by determining the hydrogen-to-carbon ratio of the pyrolysis product gas fraction and subtracting the thus determined value from the determined hydroge... | 07/03/2007 |
| 7226789 | Method of applying non-linear dynamics to control a gas-phase polyethylene reactor operability The present invention describes a method for determining reactor continuity of a polymerization reactor by non-linear dynamics. Specifically, the invention relates to a method of analyzing system variables to indicate gas phase reactor continuity in real-time and co... | 06/05/2007 |
| 7220341 | Controlling solids flow in a gas-solids reactor This invention is to a process and system for controlling solids distribution in a gas-solids reactor. Solids distribution is controlled by controlling electrical charges between solid particles flowing between conductive surfaces within a gas-solids reactor. The el... | 05/22/2007 |
| 7161050 | Method and apparatus for synthesizing olefins, alcohols, ethers, and aldehydes A reactant selected from the group consisting of alkanes, alkenes, alkynes, dienes, and aromatics is reacted with a halide selected from the group including chlorine, bromine, and iodine to form a first reaction product. The first reaction product is reacted with a ... | 01/09/2007 |
| 7148390 | Integrated process for synthesizing alcohols, ethers, aldehydes, and olefins from alkanes Alcohols, ethers, aldehydes, and olefins are manufactured from alkanes by mixing an alkane and a halogen selected from the group including chlorine, bromine, and iodine in a reactor to form alkyl halide and hydrogen halide. The alkyl halide only or the alkyl halide ... | 12/12/2006 |
| 7145051 | Combined oxydehydrogenation and cracking catalyst for production of olefins A catalyst is provided comprising (1) at least one solid acid component, and (2) at least one metal-based component comprised of one or more element from Groups 1–3, one or more element from Groups 4–15 and one or more element from Groups 16 and 17 of the Period... | 12/05/2006 |
| 7133784 | Process and method for chemical manufacturing using transformation of on-line instrumentation data A method for providing improved estimates of properties of a chemical manufacturing process is disclosed. The method regesses process variables with scores or other gains obtained from the mathematical transformation of data obtained from an on-line analyzer. Chemic... | 11/07/2006 |
| 7125817 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises (1) at least one solid acid component, (2) at least one metal-based component comprised of one or more elements from Group 3 a... | 10/24/2006 |
| 7122494 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises (1) at least one solid acid component, (2) at least one metal-based component comprised of two or more elements from Groups 4â... | 10/17/2006 |
| 7122495 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst system contains at least one solid acid component and at least one metal-based component which consists of (a) oxygen and/or sulfur and ... | 10/17/2006 |
| 7122493 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises: (1) at least one solid acid component, (2) at least one metal-based compo... | 10/17/2006 |
| 7122492 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises (1) at least one solid acid component, (2) at least one metal-based component comprised of one or more elements from Groups 1 ... | 10/17/2006 |
| 7115791 | Method and apparatus for controlling effluent composition in oxygenates to olefins conversion A process for controlling an oxygenates to olefin reactor is disclosed which comprises: contacting oxygenate-containing feedstock, e.g., methanol, in a reaction zone in the presence of a molecular sieve oxygenate to olefins conversion catalyst under conditions suffi... | 10/03/2006 |
| 7106437 | On-line measurement and control of polymer product properties by Raman spectroscopy Methods are provided for determining and controlling polymer product properties on-line in a slurry reactor system, such as a stirred slurry or slurry loop reactor. The methods include obtaining a regression model for determining a polymer product property, the regr... | 09/12/2006 |
| 7102046 | Process for the arylation of olefins The present invention relates to a process for the arylation of olefins by reaction of haloaromatics or arylsulfonates with olefins in the presence of a palladium catalyst, a bulky nitrogen base and a salt. ... | 09/05/2006 |
| 7097787 | Utilization of micro-channel gas distributor to distribute unreacted feed gas into reactors A method of partially oxidizing a feed gas comprises providing a reactor containing a catalyst, providing a gas distributor comprising a body having a plurality of channels therethrough and a plurality of outlets from said channels for distributing gas across the ca... | 08/29/2006 |
| 6905654 | Method and apparatus for reducing static charges during polymerization of olefin polymers The present invention relates to a method and apparatus for controlling static charges in a fluidized bed olefin polymerization reactor. Static charges which develop in the polymer products are measured and, if they fall outside a predetermined range, static charge ... | 06/14/2005 |
| 6590131 | Method for control of a chemical manufacturing process A method for monitoring and improving the performance of a chemical manufacturing process by monitoring transients associated with the operation of process equipment located dowstream of upstream equipment is disclosed. Transients on signals such as the m... | 07/08/2003 |
| 6576719 | Isobutene polymerization process The present application relates to a process for the continuous polymerization of isobutene while maintaining at a constant desired value a property P (viscosity or average molecular mass) of the polymer produced. The polymerization is conducted in a reac... | 06/10/2003 |
| 6521805 | Isobutene polymerization process Isobutene polymerization process wherein a property P (viscosity or average molecular weight) of the polyisobutene product is maintained constant. The polymerization is conducted continuously in a reactor comprising a boiling liquid reaction phase in equi... | 02/18/2003 |
| 6512156 | Method and apparatus for controlling severity of cracking operations by near infrared analysis in the gas phase using fiber optics A two-step method and apparatus for controlling cracking severity in the effluent from a cracking furnace such as an ethylene cracker. The method includes two steps. The first step consists of determining the near infrared spectrum of effluent in-line. Th... | 01/28/2003 |
| 6042715 | Method for modeling the crystallization of paraffins in petroleum fluids A thermodynamic model is formed which allows determination of the temperature at which waxes or paraffins appear in petroleum fluids, and notably in crudes, as well as the solid fraction that precipitates when the temperature of the petroleum fluid falls ... | 03/28/2000 |
| 5731485 | Method of controlling a heater using heat flux ratios An improved method of continuously controlling a multi-zone heater used in a chemical process has been developed. Each zone of the multi-zone heater has an ideal heat flux, FI, and an actual heat flux, FA, and the difference between the heat flux ratios, ... | 03/24/1998 |
| 5648581 | Method for vapor phase polymerization of alpha-olefin A method for polymerizing or copolymerizing -olefin in a vapor phase condition by supplying to a reactor a catalyst composed of a solid catalyst component containing at least titanium and/or vanadium as well as magnesium and an organic aluminum com... | 07/15/1997 |
| 5389342 | Apparatus for dehydrogenation process control In an endothermic steam active catalytic process employing a fixed catalyst bed in a fuel fired reactor for the dehydrogenation of alkanes to alkenes, wherein a reaction temperature above about 500° C. (932° F.) is maintained for commercially feasible c... | 02/14/1995 |
| 5365006 | Process and apparatus for dehydrogenating alkanes An alkane-containing feedstream is passed through one or more tubes, which may contain alkane-dehydrogenation catalyst, immersed in a bed of fluidized particles. The bed is at an elevated temperature which maintains the temperature within the tube(s) at a... | 11/15/1994 |
| 5082985 | Process for controlling hydrocarbon steam cracking system using a spectrophotometer The present invention relates to a process and an apparatus for steam cracking a mixture of hydrocarbons comprising passing steam and the mixture of hydrocarbons through at least one heated cracking tube. The process is characterised in that it is control... | 01/21/1992 |
| 4891464 | Control method for oxygen addition to oxidative reheat zone of hydrocarbon conversion process The rate at which an oxygen-containing gas stream is admixed with hydrocarbons and hydrogen upstream of a catalytic hydrogen oxidation zone is controlled on the basis of temperature differentials across the oxidation zone and an upstream catalytic dehydro... | 01/02/1990 |
| 4658073 | Control system for multistage chemical upgrading A process control technique for upgrading C3 -C4 hydrocarbon feed containing olefins to produce heavier liquid hydrocarbons comprising converting a major portion of C3 -C4 olefins in an oligomerization zone by c... | 04/14/1987 |
| 4620049 | Method and apparatus for controlling polybutene production The method is particularly adapted for controlling the molecular weight of a product output from a polybutene reactor. The method includes the steps of: deriving from the operating parameter of a polybutene reactor system a formula which correlates molecu... | 10/28/1986 |
| 4544788 | Control system for catalytic conversion of olefins to heavier hydrocarbons A control system is provided for an olefins upgrading plant wherein catalytic reactor effluent is separated to recover heavy, intermediate and light hydrocarbon streams. An improved liquid recycle system includes a level control technique for diverting a ... | 10/01/1985 |
| 4544781 | Control of temperature exotherms in the conversion of methanol to gasoline hydrocarbons A reactor bed, particularly one designed for converting alcohols to gasoline, is provided with a section downstream of the catalyst bed filled with high heat capacity thermal absorptive material. When the circulation of recycled gas to the system is tempo... | 10/01/1985 |
| 4257105 | Control of a cracking furnace The flow rate of a diluent fluid, such as steam, hydrogen or methane, to a cracking furnace is controlled so as to maintain a desired outlet velocity for the effluent flowing from the cracking furnace or to maintain a desired residence time for the feed s... | 03/17/1981 |
| 4231753 | Control of a cracking furnace The heat supplied to a cracking furnace is controlled in response to a calculation of the heat required to maintain a desired conversion rate for the material being cracked in the cracking furnace. The calculated required heat for the cracking furnace is ... | 11/04/1980 |
| 4129606 | Temperature control of integrated fractionation column and reaction zone A hydrocarbon stream comprising C2 to C8 hydrocarbons is stripped at a high temperature to allow passage of the stripper bottoms stream into a reaction zone without further heating, and the effluent of the reaction zone is then heat ... | 12/12/1978 |
| 4069272 | Oxidative dehydrogenation effluent control Organic compounds, especially hydrocarbons, are oxidatively dehydrogenated by contacting them with an oxygen-containing gas and steam under dehydrogenation conditions, and, following this reaction, the oxygen concentration in the organic portion of the ef... | 01/17/1978 |
