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8118995 |
Process for inhibiting fouling in hydrocarbon processing
A method for inhibiting the formation of fouling materials including contacting hydrocarbon media containing aldehyde compounds with an antifoulant while treating the hydrocarbon media with a basic...
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8057642 |
Method of corrosion prevention
This invention relates to a process for reducing the corrosion rate of iron-containing vessels within an ethylene glycol distillation system. The inventive process includes the addition of an...
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8029650 |
Antifreeze recycling systems
A method for purifying used antifreeze is disclosed. An antifreeze recycling systems uses a simple-distillation apparatus adapted to distill clean antifreeze from used antifreeze. A novel scraper...
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7862727 |
Desalination scale inhibitors
A method and composition for processing natural water such as seawater, brackish, and estuarine water wherein the water is concentrated with or without heating comprising adding to the water (I) a...
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7790001 |
Method of corrosion prevention
This invention relates to a process for reducing the corrosion rate of iron-containing vessels within an ethylene glycol distillation system. The inventive process includes the addition of an...
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7585403 |
Dispersant of saline deposits in hydrocarbon process plants
Use of diaminopropanes, or of a composition thereof as a dispersing agent to prevent the formation or remove already formed deposits of ammonium salt in hydrocarbon process plants, such as...
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7332070 |
Method of preventing heat exchanger fouling
A specific nonionic surfactant is added to a component mainly comprising hydrocarbons before passing through a heat exchanger in a petrochemical plant or a polyolefin production plant, whereby...
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7309403 |
Method for avoiding corrosion
The invention relates to a method of avoiding corrosion in the separation of methylamine from a product stream (10) which is obtained in the preparation of methylamines by gas-phase reaction of...
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7205438 |
Solvent recovery blends from diene production
A diene production stream comprising a solvent recovery blend from diene production comprising one or more fouling agent, one or more extractive distillation solvent, and from about 1 ppm to about...
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7182839 |
Preventing deposition of fouling agents onto equipment
Methods and compositions effective to prevent deposition of fouling agents, preferably polymerization precursors, on handling equipment, particularly during solvent recovery.
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7097671 |
Method of cleaning industrial gases
A methanol/water scrubbing solution containing colloidal metal sulfides formed from metal carbonyls and resulting from the scrubbing of industrial gases, such as synthesis gas, is subjected to...
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6881231 |
Reduction in mineral salt deposition
A composition for reducing deposition of a mineral salt from an aqueous supersaturated solution onto a solid surface in contact with the aqueous supersaturated solution which composition comprises...
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6475347 |
High boiling inhibitors for distillable, polymerizable monomers
Disclosed herein are compounds of the structure whereinR1, R2, and R3 are organic radicals of C1 to C20, such that the combination of the three contain at least twelve carbon atoms and R3 is bound...
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6358372 |
Method of reducing formation of precipitates in solvent recovery system
A method of removing at least one inert reaction diluent and/or wash solvent from a waste stream from a catalyst precursor production unit is disclosed, where the waste stream includes at least one...
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6090240 |
Method of inhibiting scaling in black liquor evaporators
A method of inhibiting calcium carbonate scaling in a multi-stage evaporation plant of black liquor by heat-treating calcium-containing liquor includes a first stage wherein the calcium-containing...
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5993607 |
Process for the purification of chlorinated aromatic hydrocarbons
In a process for the purification by distillation of chlorinated aromatic hydrocarbons originating from the chlorination of aromatic hydrocarbons in the presence of FeCl3, the crude reaction...
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5866011 |
Method of controlling scale formation in brine concentration and evaporation system
A method of treating water to inhibit the formation of salt scale is disclosed. The method is particularly effective at inhibiting the formation and deposition of mineral salts in brine...
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5681432 |
Inhibition of organic deposition using additives to retard settling
Methods for inhibiting organic fouling of heat transfer surfaces in contact with an alcohol distillation stream are discussed. The methods include adding to the alcohol distillation stream an...
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5676801 |
Radial inflow compressor for large volumetric flows
A radial-inflow large volume-rate low pressure-differential, single-stage compressor comprising 2 periphiral concentric sets of axial blades spaced circumferentially between two supporting rings...
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5659095 |
Composition for inhibiting the polymerization of aromatic vinyl monomers
A polymerization inhibitor composition for inhibiting the polymerization of aromatic vinyl monomers at elevated temperatures comprising:(a) a benzofuroxan derivative of the formula ##STR1## wherein...
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5641396 |
Use of 2-amino-1-methoxypropane as a neutralizing amine in refinery processes
2-amino-1-methoxypropane is used as a neutralizing amine in crude oil distillation units. The amine of the invention gives superior neutralization at the first initial condensate compared to other...
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5632865 |
Method for introduction of aggressive liquid additives
The invention is a method of introducing an aggressive liquid additive into a vapor-containing process stream including (a) heating the liquid additive by a heating means thereby producing a heated...
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5622605 |
Process for desalinating water while producing power
A process and apparatus for desalinating seawater or brine and purifying water which contains minerals, salts, and other dissolved solids while simultaneously generating power. The salinous water...
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5616217 |
Controlled alkali treatment in the recovery of methyl tertiary butyl ether
In the manufacture of MTBE from TBA and methanol, acidic by-products formed during the etherification reaction are removed by fractionating the etherification reaction product in a first MTBE...
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5578173 |
Removal of dimethylterephthalate from a methanolysis vapor stream
A method of removing dimethyl terephthalate (DMT) from a vapor stream. The vapor stream includes dimethyl terephthalate (DMT), methylhydroxyethyl terephthalate (MHET), glycols and methanol. A...
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5556575 |
Corrosion inhibition in refineries using the reaction product of hydrocarbyl succinic anhydride and an amine
Disclosed are a method for inhibiting corrosion in crude oil distillation towers, an improvement in crude oil fractionation, a method for dispersing iron sulfide in a hydrocarbon stream and a...
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5552085 |
Phosphorus thioacid ester inhibitor for naphthenic acid corrosion
Corrosion of the metallic surfaces of distillation columns, trays, packing, and pumparound piping used in the production of hydrocarbons can be controlled by adding a neutralized or non-neutralized...
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5531937 |
Water soluble cyclic amine-dicarboxylic acid-alkanol amine salt corrosion inhibitor
Compositions and a method of using the compositions to inhibit corrosion. The compositions are water soluble n-alkyl morpholine, saturated dicarboxylic acid, optionally alkanol amine and optionally...
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5368830 |
Scale control in gold and silver mining heap leach and mill water circuits using polyether polyamino methylene phosphonates
Calcium carbonate scale deposits, occurring in gold and silver mining involving the cyanidation process which utilizes heap and vat leaching, and carbon-in-pulp, carbon-in-leach, particularly...
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5336414 |
Methods for inhibiting the deposition of proteinaceous materials on heat transfer surfaces
Methods for controlling the formation of proteinaceous fouling deposits in high temperature evaporators and concentrators as employed in processing steepwater in the wet milling of corn. The...
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5324393 |
Fouling prevention in ethylene dichloride distillation units
A method for preventing fouling of ethylene dichloride distillation units which comprises treating the feed to such unit with a fouling preventing amount of a composition comprising (a) 2-15 weight...
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5269908 |
Ammonium chloride deposit retardation in hydrocarbon streams by addition of inert gas
In a process for the separation of hydrocarbon materials and other materials including ammonia and hydrogen chloride normally associated with the hydrocarbon materials in refining of petroleum, the...
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5268073 |
Continuous process for concentrating solutions containing salts and resins
In concentrating solutions containing 1 to 10% by weight of salts and resins, the yield and economics and trouble-free running can be improved by using a flow tube which has a steady curvature at...
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5262013 |
Coolant recycling method and apparatus
A coolant recycling apparatus has a boiler and condenser for distilling a glycol and water from a used coolant. The glycol and water are recombined in a mixing tank to form a mixture having a...
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5250151 |
Method of evaporating liquids
An evaporation assembly for concentrating liquids having an evaporation area for conveying a liquid to be concentrated and a heating system for heating and concentrating the liquid conveyed through...
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5188179 |
Dynamic polysulfide corrosion inhibitor method and system for oil field piping
A system and method for inhibiting corrosion of oil field pipe exposed to corrosive material including hydrogen sulfide, carbon dioxide, and sodium chloride with a corrosion inhibiting film which...
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5182013 |
Naphthenic acid corrosion inhibitors
Naphthenic acid corrosion in refinery distillation units is inhibited by introducing into the units effective amounts of a polysulfide corrosion inhibitor.
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5178734 |
Water distilling apparatus with vertically stacked components
A water distilling apparatus (10) which includes vertically stacked components, i.e. an uppermost water storage tank (12), an intermediate boiling tank (14) and a lowermost condensing unit (16)....
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5156706 |
Evaporation of liquids with dispersant added
A vertical tube evaporation process for the concentration of saline water and other liquids, including the addition of an anionic mono-molecular dispersant thereto which interacts with materials...
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5133837 |
Dimpled plate multi-stage flash evaporator
A multi-stage flash evaporator is constructed so that the evaporator elements are dimpled plates mounted so that they extend horizontally. One, two, or more sets of plates may be mounted in each...
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5110997 |
Process for preventing fouling in the production of ethylene dichloride
A method of inhibiting fouling in a crude ethylene dichloride stream comprises introducing into the stream an inhibiting amount of an antifoulant selected from (A) an acylated amine (e.g., reaction...
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5104491 |
Method for purifying pentachloronitrobenzene by solid base treatment
Crude pentachloronitrobenzene containing hexachlorobenzene and small amounts of acids is treated in the molten state or in a mixture solution of nitrobenzene or chloronitrobenzenes with an...
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5021128 |
Water distillation system and method with controls
A control for a water distillation apparatus admits untreated feed water to the boiling tank in response to a demand for the production of distilled water and operates the heater to produce steam....
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4980031 |
Solvent recovery
Hydrogen chloride evolution is reduced in the distillation of chloroform from its admixture with an amide solvent when in contact with stainless steel, by incorporation of certain tertiary...
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4941946 |
Process for decreasing the tendency to form deposits in plants for evaporating spent sulfite liquors
A process for decreasing the tendency to form deposits in plants for evaporating spent sulfite liquors used to produce woodpulp. In the process, the liquors are treated with polyacrylic acids...
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4929361 |
Method of inhibiting fouling in protein-containing fluids
Methods for controlling the formation of proteinaceous fouling deposits in high temperature evaporators and concentrators as employed in processing steepwater in the wet milling of corn. The...
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4836891 |
Self-contained oil well salt water concentration system
A method for concentrating salt water. Salt water is separated from oil-water mixture which has been produced from a well. Salt water is introduced into a recirculating weir and mixed with more...
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4806229 |
Volatile amines for treating refinery overhead systems
A process for substantially neutralizing the volatile acid gases and water present in the condensate of a distilling pertroleum product which comprises treating the distilling product prior to the...
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4795532 |
Aftertreatment method and apparatus for distilled water
A method and apparatus for treating the distilled water obtained from an evaporation process sea water desalination plant is provided wherein carbon dioxide is extracted from sea water in the high...
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4758311 |
Method for avoiding the corrosion of the strippers in the urea manufacturing plants
A method for passivating the surface of the strippers of the urea plants, where the temperatures are very high, where the pressures range from 120 to 240 Kg/cm2 and where the effluent process flow...
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