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4272823 |
Control system for a reactor
Control of the temperature profile across a reactor which contains a plurality of catalyst beds is accomplished by splitting the feed to the reactor in such a manner that a portion of the feed is...
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4263010 |
Control method and apparatus for crystallizer process control
A control method and apparatus is provided for the on-line control of crystallizer apparatus and the like to maintain predetermined operating parameters including crystal size distribution and...
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4256695 |
Copper liquor control system
A control system controls the cupric ions content and the cuprous ions content of a copper liquor so as to control the strength of the copper liquor. The system includes a sensor sampling the...
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4251503 |
Efficiency control system for chlorine dioxide plants
An automatic continuous monitoring system for a chlorine dioxide generating process (10) which produces a gaseous mixture of chlorine dioxide and chlorine (12) is described. The automatic system...
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4251224 |
Control system for chlorine dioxide plants
A machine-controlled chlorine dioxide generating process which produces a gaseous mixture of chlorine dioxide and chlorine is described. Efficiency determinations are made from gas analysis and...
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4251221 |
Method and apparatus for fine-tuning in carbon black production
A method and apparatus for producing carbon black under fine-tuned conditions which comprises measuring a property of the black produced in a tangential introduction of hot gases to produce a...
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4249908 |
Temperature control of exothermic reactions
A selective hydrogenation process wherein at least two catalyst beds in series is controlled by predicting the inlet temperature to the first catalyst bed in the series required to maintain the...
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4249907 |
Temperature control of exothermic reactions
In a selective hydrogenation process wherein at least one catalyst bed is utilized, the temperature of the feed stream to the catalyst bed is controlled so as to maintain a desired reaction...
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4217243 |
Catalyst regenerator control
The flow of air into a catalyst regenerator is automatically controlled by controlling a side air stream responsive to a computed desired total air flow signal and by controlling a main air stream...
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4211340 |
Catalyst regeneration
A system for controlling the addition of small amounts of material to process using the loss-in-weight method. The system uses digital control in combination with an on-off solenoid valve whose on...
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4187548 |
Simulation of catalytic cracking process
The specific disclosure is directed to a catalytic cracking model wherein the reactant and product species are lumped according to molecular type and boiling range. The specific invariant lumping...
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4176052 |
Apparatus and method for controlling the rate of feeding a petroleum product to a coking drum system
A coking drum system is provided in combination with a process control unit wherein the rate of material delivered to a coking drum during a coking process timing cycle is monitored and the...
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4155774 |
Process for controlling the rate of growth of particulate masses
A vacuum pan is controlled by directly monitoring the total solids concentration of a boiling solution. A preferred type of process relates the change in concentration of sugar in a massecuite to...
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4132530 |
Temperature control in exothermic/endothermic reaction systems
Control of temperature increases (delta-T) through a reaction zone, in which both exothermic and endothermic reactions are effected, is achieved by sensing the inlet temperature of the charge...
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4055751 |
Process control system for the automatic analysis and regeneration of galvanic baths
A process control system for metal depositing baths for monitoring the chemical composition of a bath liquid provides that, in the event of a deviation of a component of the bath liquid from a...
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4035251 |
Method and apparatus for reduction cell control
Method of operating (and apparatus including) an electrolytic cell for the production of aluminum, in which provision is made for monitoring the cell resistance, producing feed control signals...
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4022555 |
Tire cure programmer and function generator
An apparatus for controlling sequence and duration of the operational steps in processes such as vulcanization of a pneumatic tire is capable of operating under two basic modes or parameters. In...
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4012199 |
Chemical reaction and production systems with a spectro-optical digitizer
Several digital sensing devices are described for use in automated production systems. The first described is for use in the automatic operation of a reactor. This device employs a binant...
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3993447 |
Apparatus and method for control of carbon black reactor
In a carbon black production system having a reactor with a combustion zone and a reaction zone, substantial uniformity of the carbon black produced by the reactor is maintained by regulating the...
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3986029 |
Method for controlling uranium enrichment systems
A method for controlling the operation of uranium enrichment systems in which gaseous uranium compounds are processed. The method comprises separating at one or a plurality of precipitation points...
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3985712 |
Method and apparatus for preparing intermediate polyester resin
A programmed method for the preparation of an intermediate polyester resin is disclosed. The process is monitored and controlled by a supervisory on line computer which supervises the three phases...
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3981942 |
HF alkylation process and reaction temperature control system
A control system for regulating the reaction zone temperature in a process for the acid-catalyzed reaction of an isoparaffin with an olefinic feed stream containing mixed olefins. Hydrocarbon...
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3981793 |
Automatic control of a hydrocracker
From the values for the recycle oil feed rate and the fresh oil feed rate of a hydrocracker a material balance conversion computation is carried out resulting in a material balance conversion...
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3979183 |
Heat exchange and flow control system for series flow reactors
A heat exchange method and flow control system for a hydrocarbon conversion process having two reactors in series which allows efficient heat recovery and effective process control under widely...
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3972804 |
Control of hydrogen/hydrocarbon mole ratio in hydrogen-consuming process
A system for controlling the hydrogen/hydrocarbon mole ratio in a continuous hydrocarbon conversion process in which hydrogen is consumed in a catalytic reaction zone. Applicable to processes in...
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3972957 |
HF alkylation reaction temperature control system
A control system for regulating the reaction zone temperature in a process for the acid-catalyzed alkylation of an isoparaffin with a mixed olefinic feed stream. Composition characteristics of the...
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3963909 |
Method and apparatus for computation in a kinetic analyzer
The nominally linear reaction rate and the curvature thereof are computed over an observation period by integrating the absorbance signal in opposite directions during portions of the observation...
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RE28864 |
Process and apparatus for automated regulation of sulphur production units
A process for automated regulation of a unit producing sulphur by oxidation of hydrogen sulphide, in which the flow of gas carrying oxygen into the unit is regulated so as to keep an operating...
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3937615 |
Auto-ranging glucose measuring system
An auto-ranging glucose measuring system including a device capable of mixing a glucose containing solution and a diluent in a variable ratio, a glucose oxidase enzyme converter column for...
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3937747 |
Balancing adiabatic reactors
Butadiene is prepared by directing a C 4 hydrocarbon stream through seven parallel adiabatic beds. The dehydrogenation period and the regeneration period are each about 9 1/5 minutes with...
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3917931 |
Means and method for controlling an absorber system
A control system controls an absorber system having two or more absorbers to achieve an optimum operating condition. The components of feed solvent, effluent gas and feed gas to and from the...
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3871831 |
PROCESS FOR AUTOMATED REGULATION OF SULPHUR PRODUCTION UNITS
A process for automated regulation of a unit producing sulphur by oxidation of hydrogen sulphide, in which the flow of gas carrying oxygen into the unit is regulated so as to keep an operating...
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3781533 |
CONSTRAINT CONTROL SYSTEM FOR OPTIMIZING PERFORMANCE OF PROCESS UNITS
A control system which automatically optimizes the performance of a process unit by continuously scanning the important operating variables, measuring the deviation of these variables from a...
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3775595 |
APPARATUS FOR PROCESSING CHEMICAL MATERIALS HELD IN CONTAINER STRUCTURES
Incubation apparatus for use with a cuvette having a projecting processing control member and a plurality of chambers, at least one of which contains a stored chemical material includes a cuvette...
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3761690 |
COMPUTER CONTROL OF A PHYSICAL SYSTEM IN WHICH THE MAGNITUDE AND FREQUENCY OF CORRECTIONS ARE SYSTEM DEPENDENT
A control system for a physical system which includes a chamber wherein the value of a desired property of the system is to be maintained within predetermined limits of deviation. There is provided...
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3708658 |
PRESSURE MONITORED TEMPERATURE CONTROLLED SYSTEM FOR A LIQUID-VAPOR PROCESS
A system for dynamically controlling the temperature of the liquid mass in a liquid-vapor phase process at a predetermined value. Pressure and temperature sensors are used to generate signals...
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3703726 |
QUANTITATIVE CHEMICAL ANALYSIS BY X-RAY EMISSION SPECTROSCOPY
In X-ray emission spectrometry a quantitative chemical analysis of the elements in an unknown sample is obtained. A standard, or standards, whose composition has previously been accurately...
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3689747 |
DIGITAL EVAPORATION MONITOR SYSTEM
The thickness and rate of evaporation are determined by digitally monitoring the change in frequency effected by the increasing thickness of deposited evaporation on the monitor crystal of the...
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3656911 |
CONTROL SYSTEM FOR HYDROGENATION REACTIONS
A control system for a selective hydrogenation reaction computes the desired feed input temperature to the reactor in response to measurements of flow rate and analyses of the inlet and effluent...
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3655343 |
APPARATUS FOR OXIDIZING A SPENT PULPING LIQUOR
A dual stage oxidation apparatus having a first and a second oxidation chamber arranged so that the first chamber convergingly extends in a pipelike manner and discharges into the second chamber,...
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3636331 |
METHOD AND SYSTEM FOR THE AUTOMATIC CONTROL OF CHEMICAL PLANTS WITH PARALLEL-CONNECTED COMPUTER BACKUP SYSTEM
A method and system for the automatic control and regulation of chemical processes in chemical plants using digital process computers which comprises operating at least two identical computers in...
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3621217 |
SPECIAL-PURPOSE PROCESS CONTROL COMPUTER
A process-controlling computer wherein an analytical instrument is provided and is used as a standard against which to calibrate the model of the process in the computer. The process is of such a...
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3537820 |
METHOD OF AND APPARATUS FOR ANALYZING A CHEMICAL COMPOSITION
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3523786 |
METHOD OF OPERATING AND CONTROLLING A ZINC BLAST FURNACE
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3497449 |
CONTROLLING A CONTINUOUS PROCESS BY CONCENTRATION MEASUREMENTS
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3458691 |
PROCESS CONTROL SYSTEM
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3454366 |
ELECTRONIC CONTROLS OF A PLUTONIUM EXTRACTION BATTERY EMPLOYING NEUTRON DETECTORS
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3441725 |
PROCESS MEASUREMENT SYSTEM FOR BASIC OXYGEN REFINING OF STEEL
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3441836 |
PROCESS CONTROLLER WHEREIN RATE ACTION IS DEPENDENT SOLELY UPON THE PROCESS VARIABLE
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3427138 |
PROCESS CONTROL SYSTEM FOR MAKING BUTYL RUBBER
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