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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...
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6171449 |
Cascade reboiling of ethylbenzene/styrene columns
Apparatus and process are disclosed for the distillation separation of styrene monomer from ethylbenzene utilizing a split feed to two distillation columns in conjunction with cascade reboiling...
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5767332 |
Process and apparatus for producing aromatic hydrocarbon composition
In the production of aromatic hydrocarbon from coking crude by-product benzene after a vaporization stage in which the crude benzene is evaporated to leave a residue, the crude benzene is subjected...
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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...
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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...
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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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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...
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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....
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4230894 |
Method for producing 3-alkylphenols and 1,3-hydroxybenzene
Benzene or alkylbenzene (e.g. toluene) is alkylated with propylene to produce diisopropylbenzenes or isopropylalkylbenzenes, which in turn are selectively cracked to remove the 1,4-isomer. The...
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4207423 |
Acid type hydrocarbon alkylation with acid-soluble oil addition
A continuous process for the alkylation of an alkylatable hydrocarbon with an alkylating agent in the presence of an acid-type catalyst, including; contacting an alkylatable hydrocarbon with an...
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4180689 |
Process for converting C.sub.3 -C.sub.12 hydrocarbons to aromatics over gallia-activated zeolite
This case relates to a process for producing aromatics by contacting a C 3 -C 8 hydrocarbon with a gallium catalyst supported on an aluminosilicate in which the ratio of silica to alumina is...
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4129606 |
Temperature control of integrated fractionation column and reaction zone
A hydrocarbon stream comprising C 2 to C 8 hydrocarbons is stripped at a high temperature to allow passage of the stripper bottoms stream into a reaction zone without further heating, and the...
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4101596 |
Low pressure xylene isomerization
Long on-stream periods of low pressure, vapor phase isomerization of xylenes is achieved in a system having tolerance of ethyl benzene in the charge by using a zeolite catalyst such as zeolite...
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4053531 |
Steam reforming of polycyclic hydrocarbons
Polycyclic aromatic hydrocarbons are treated with steam in the presence of catalyst, typically containing oxides of nickel, potassium, chromium, and aluminum, to form aromatic products containing a...
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4052479 |
Conversion of methanol to olefinic components
A method and sequence of process steps is described for effecting the conversion of lower alcohols comprising methanol, ethanol, and propanol to primarily olefin boiling range component under...
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4052476 |
Toluene disproportionation over zeolite catalyst
A process is provided for disproportionation of toluene in a reaction zone maintained under conditions such that said disproportionation is accomplished in the vapor-phase, with a...
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4049739 |
Simulated moving bed alkylation process
A continuous catalytic alkylation reaction and catalyst reactivation process is carried out using a simulated moving catalyst bed to effect simultaneously in different zones of a multi-zone, fixed...
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4038334 |
Fractional distillation pressure control for separation of aromatic alkylation product
A pressure control system and method for utilization in a process for effecting the alkylation of an aromatic hydrocarbon with a normally gaseous olefinic feed stream. The system is intended to...
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3894936 |
Conversion of hydrocarbons with "Y" faujasite-type catalysts
A FCC operation is described for separately converting with faujasite conversion catalyst, a gas oil feed material and a C 3 -C 4 rich hydrocarbon fraction. Conversion of the gas oil is...
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3882183 |
Process for the alkylation of aromatic hydrocarbons
Process for the alkylation of aromatic hydrocarbons by reaction of an olefin with an aromatic hydrocarbon in the presence of a complex catalyst comprising a metal halide and aromatic hydrocarbons,...
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3760168 |
REACTION ZONE CONTROL
The method and means of controlling the output of a multi zone reaction installation about a desired conversion level and at optimum performance conditions. An input to the reaction installation is...
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3622281 |
HIGH-TEMPERATURE REACTION VESSEL
A high-temperature, high-pressure vapor phase reactor for chemical conversions requiring a quench to maintain the reaction temperature substantially isothermal, which is capable of easy field...
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3619407 |
HYDROCRACKING PROCESS WITH BENZCORONENES BLEEDSTREAM
Mineral oil feedstocks which contain dissolved benzcoronenes are subjected to recycle catalytic hydrocracking over crystalline zeolite-type catalysts while bleeding from the system a small...
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3529030 |
VAPORIZING AND SUPERHEATING THE LIQUID FEED IN AN ISOMERIZATION PROCESS
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3471582 |
CONTROL OF EXOTHERMIC REACTIONS
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3470261 |
CONTROL OF ALKYLATION CATALYST ACTIVITY
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3436337 |
SYSTEM AND METHOD FOR FRACTIONATION
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3433848 |
METHOD OF CONTROLLING SELECTIVITY IN AN AROMATIC HYDROCARBON DEALKYLATION PROCESS
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3392206 |
Alkylation of benzene
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3303230 |
Control of alkylation catalyst activity
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3277195 |
Control of alkylation catalyst activity
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3256357 |
Temperature control in hydrodealkylation process
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3211799 |
Method for alkylation of aromatics
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3183233 |
Alkylation-transalkylation process
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3171862 |
Hydrodealkylation reactor system
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3101380 |
Control of hydrogen concentration in recycle hydrogen streams in the hydrodealkylation process
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3074881 |
Separation of hydrocarbon mixtures
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2972576 |
Method of controlling oil refining processes
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2935374 |
Temperature control in vapor phase chemical reactions
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2924569 |
Hydrodealkylation of hydrocarbons
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2846489 |
Control of friedel-crafts alkylation catalyst by measurement of electro conductivity
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2816096 |
Removal of oxygen from streams containing hydrocarbon diolefins and the like
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2813138 |
Production of unsaturated hydrocarbons and reactor therefor
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2804426 |
Maintaining catalyst activity in a hydroforming process
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3759820 |
Title is not available
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3637881 |
Title is not available
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