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5067092 |
Prespot detection method and apparatus in an analyzer
A method and apparatus for detecting an erroneous pre-spotting of liquid onto a test element in an analyzer. The invention utilizes a wetness detector and calculates the estimated second derivative...
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5054385 |
Pasteurizing control apparatus
The improved milk pasteurizing control apparatus is of the type having a flow diversion valve controller in an enclosure with a door, panel or the like required to be sealed on the outside of the...
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5029620 |
Method of operating a gas recovery system and apparatus for employing the method
A gas which is intermittently and/or irregularly released e.g. carbon monoxide-containing gas from an oxygen steel converter, is collected in a gas holder and delivered from the gas holder to a...
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5025389 |
Method of analyzing reaction rate in chemical analysis
The present invention relates to a method of analyzing a reaction rate in chemical analysis, in which a plurality of time region bands wherein the reaction rate is measured are set to be different...
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4989157 |
Automated chemical milling controller
To maintain the actual milling rate of a chemical milling solution within a predetermined range, an automated chemical milling controller periodically measures the actual milling rate within the...
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4983526 |
Method of measuring and controlling ozone concentration
A method of measuring or controlling ozone concentration by ultraviolet ray absorptiometry, includes charging air into a testing tank with its temperature controlled, measuring the disturbing gases...
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4947340 |
Instrument for the measurement and determination of chemical pulse column parameters
An instrument for monitoring and measuring pneumatic driving force pulse parameters applied to chemical separation pulse columns obtains real time pulse frequency and root mean square amplitude...
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4943929 |
Chemical agent monitor and control interface
A chemical monitor interface is generally comprised of three identical ciit boards each linked together through fiber optics. One of the circuit boards is electrically connected to a Chemical Agent...
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4910691 |
Process control system with multiple module sequence options
An integrated system for process control in which a process supervisor procedure (which is preferably the top-level procedure) is configured as a modular software structure, with modules which can...
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4908188 |
Gas sterilant system
A system for treating articles, preferably with a sterilizing, gas is disclosed. The system includes a chamber into which the articles are received and valves for supplying the sterilizing gas to...
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4897797 |
Proportional chemical feeding system
In a treatment system for feeding a liquid from a tank having an outlet by a controllable pump operated cyclically, an automatic calibration/measuring system. The system is arranged for determining...
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4858144 |
Detection of anomalies in gas fluidized bed polymerization
A process for detecting anomalies in a fluidized bed, e.g. the incidence of agglomeration in gas-fluidized bed polymerization, comprises sensing and converting into electrical signals the pressure...
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4845638 |
Method of eliminating excess nitrite in diazotisation solutions
The invention relates to an automatically controlled continuous method of eliminating excess nitrite in diazotization solutions of aromatic amines, which comprises controlling the addition of the...
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4835707 |
Automatic analysis method and apparatus for enzyme reaction
An automatic analysis method of and apparatus for the full automation of an enzyme reaction analysis from the pretreatment step of the reaction to the data processing step, wherein the operation of...
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4825380 |
Molecular weight determination for constraint control of a compressor
A supervisory computer is provided for controlling a compressor wherein a computer generated set point manipulates flow in a recycle line from the compressor outlet to inlet. The supervisory...
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4824249 |
Systems for the direct analysis of solid samples by atomic emission spectroscopy
An analysis system for directly analyzing solid samples by atomic emission spectroscopy wherein the system includes an atomic spectral lamp (1) of the type which enables a solid sample to be...
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4786379 |
Measuring current distribution in an alumina reduction cell
A method and apparatus are disclosed for measuring the current distribution in an alumina reduction cell. The apparatus includes sensors attached to the anodes of the cell, a remote computer system...
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4751054 |
Apparatus for removing NO.sub.x from a gas
An ammonia injection rate to an apparatus for catalytically removing nitrogen oxides from a combustion flue gas in the presence of ammonia, provided in a flue gas passage, is controlled in...
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4750133 |
Validation of kinetic chemical reaction
A method of validating measurement of a kinetic chemical reaction comprises a first tier of validation to validate the ability of a measurement and detection system to provide accurate data, a...
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4747912 |
Cracking furnace control
For parallel heat exchangers, one using a more preferred heat exchange medium as a heat exchange source and another using a less preferred heat exchange medium, maximum use of the more preferred...
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4736316 |
Minimum time, optimizing and stabilizing multivariable control method and system using a constraint associated control code
In accordance with the present invention, a constraint dependent control method and system for a large scale refinery, chemical process or the like, is provided that allows on-line optimization of...
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4701838 |
Characterizing and handling multi-component substances
A method of handling, as bulk material, a substance which is one member of a class of multi-component substances includes subjecting successive test samples of the substance to a series of...
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4701861 |
Filter test device
A filter test device comprises an inlet which communicates with a gas source, an outlet which communicates with the inlet of a filter vessel, a pneumatic valve apparatus disposed between the inlet...
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4658073 |
Control system for multistage chemical upgrading
A process control technique for upgrading C 3 -C 4 hydrocarbon feed containing olefins to produce heavier liquid hydrocarbons comprising converting a major portion of C 3 -C 4 olefins in an...
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4623968 |
Structured design and decentralized control of production installations
A process for controlling an installation for the production of chemical substances sub-divides the process control into control regions which are controlled in a decentralized manner and in which...
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4589072 |
Apparatus for automatically measuring and controlling chemical reaction amount
This invention is directed to a reaction amount measurement apparatus capable of measuring the reaction amount and also to a reaction amount measurement and controlling apparatus capable of...
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4546442 |
Microcomputer control system for desiccant dryer
A microcomputer-based programmable control system for desiccant air dryers monitors the level of moisture saturation of the desiccant beds and adjusts the regeneration cycle accordingly to optimize...
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4542466 |
Method for controlling the state of vulcanization of wheel tires and apparatus therefor
A method for controlling the state of vulcanization of a wheel tire which comprises controlling the process steps of a vulcanizing process preceeding the heating step according to a time mode,...
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4536606 |
Control of a cracking furnace
The heat provided to a cracking furnace is manipulated so as to maintain the actual conversion of a first component in the feed stream flowing to the cracking furnace substantially equal to the...
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4517059 |
Automated alternating polarity direct current pulse electrolytic processing of metals
Disclosed is a method and apparatus for electrolytic processing of a metal surface which, in a preferred embodiment, is anodization of an aluminum or aluminum alloy surface. An apparatus and method...
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4491924 |
Olefin oxidation reactor temperature control
A temperature control system controls the temperature of an olefin oxidation reactor by measuring various parameters in the reactor and in flow lines to and from the reactor, and using these...
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4488239 |
Temperature control system for olefin oxidation reactor
A temperature control system controls the temperature of an olefin oxidation reactor by measuring various parameters in the reactor and in flow lines to and from the reactor, and using these...
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4453949 |
Ash bed level control system for a fixed-bed coal gasifier
An ash level control system is provided which incorporates an ash level meter to automatically control the ash bed level of a coal gasifier at a selected level. The ash level signal from the ash...
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4439533 |
Fluid particle backmixed cooling process
A process and associated apparatus for the cooling of hot fluidized solid particles. The particles flow from a first dense phase fluidized bed into the shell side of a vertically oriented shell and...
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4434245 |
Fluid particle cooling process and apparatus
A process and associated apparatus for the cooling of hot fluidized solid particles. The particles flow from a dense phase fluidized bed into the shell side of a vertically oriented shell and tube...
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4422151 |
Liquid handling apparatus
A liquid handling apparatus capable of being used as a fraction collector, sampler, dispenser, diluter or the like utilizes a microprocessor and three stepping motors to move a liquid handling tube...
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4414193 |
Production of chlorine dioxide on a small scale
Chlorine dioxide for waste water treatment is formed by reaction of sodium chlorate, sodium chloride and sulphuric acid at high acidity while the reaction zone is subjected to subatmospheric...
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4399100 |
Automatic process control system and method for curing polymeric materials
The invention is directed to an apparatus and method for curing polymeric materials by use of a closed-loop, automatic process control technique. A dielectric monitoring device (15) senses the...
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4390348 |
Trim control process for partial oxidation gas generator
Trim control of a partial oxidation gas generator for the production of synthesis gas, reducing gas, or fuel gas is effected by two improved control schemes which are automatically operated...
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4371499 |
Control of a fluid catalytic cracking unit
A control system for a fluid catalytic cracking unit is provided in which either the wet gas compressor or the air blower is selected for base loading. After the device selected for base loading...
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4367354 |
Temperature control of a selective hydrogenation process
In a selective hydrogenation process wherein at least two catalyst beds in series are utilized, the temperature of the feed stream flowing to the first catalyst bed and the temperature of the feed...
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4358822 |
Adaptive-predictive control system
An adaptive-predictive control system for controlling single-input, single-output or multivariable time-variant processes with known or unknown parameters and with or without time delay, is...
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4349869 |
Dynamic matrix control method
A method for controlling and optimizing the operation of a series of interdependent processes in a plant environment. Manipulation of one or more constrained process input variables is used to...
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4332590 |
Reactor control
In a method and apparatus for control of a reaction system in which a plurality of feedstock-containing streams are combined to form a total reactor feed stream, the desired ratio of relative...
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4329150 |
Method and apparatus for control and optimization of pyrolysis furnace with multiple parallel passes
An improved method and apparatus for control of a multi-pass pyrolysis furnace, e.g. for the pyrolysis of hydrocarbon feed to produce an effluent with a high ethylene content is disclosed. The...
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4311672 |
Method and apparatus for producing carbon black
In a carbon black manufacturing process in which an off-specification rerun carbon black is mixed with the carbon black flowing from a carbon black reactor to produce a combined carbon black...
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4302205 |
Input control method and means for nitrogen oxide removal
Nitrogen oxide contained in the flue-gas from a heating unit is removed in a nitrogen oxide removal unit by injection of nitrogen oxide removing agent in an amount determined by the amount of the...
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4298955 |
Method of and apparatus for the detection and analysis of hazards
The invention provides a system for detecting and analysing deviations from normal in the operating conditions of a process, for example a chemical manufacturing process. The system comprises...
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4290110 |
Temperature control for a reactor
Control of the temperature rise across a reactor where a portion of the product stream flowing from the reactor is recycled and mixed with the feed flowing to the reactor is accomplished by...
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4288230 |
Method and a device for the production of a solid-forming or foam-forming flowable reaction mixture
The present invention relates to a process and apparatus for preparing flowable reaction mixtures. The process comprises (a) measuring the volumetric rate of flow of at least one of said...
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