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WO/1993/012200A1 |
A method is disclosed for quenching the effluent from hydrocarbon pyrolysis units and removing resultant heavy oils and tars to prevent their accumulation in the recirculated quench water and excess quench water. Gaseous pyrolysis efflue...
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WO/1993/010080A1 |
A method for inhibiting fouling in an organic process stream which is substantially non-aqueous by the addition of certain oxime compounds.
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WO/1993/009203A1 |
A tubular furnace of such an arrangement that, while a fluid to be heated can be prevented from coking or a heating pipe can be prevented from burning, a predetermined quantity of heat is provided through a smaller heat transfer area and...
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WO/1993/004329A1 |
A cracking gas rapid cooling heat exchanger, wherein heat transfer pipes and downcast pipes of respective heat exchangers which are suspended from the bottom of a steam drum are fixed to the steam drum and the bottoms of these pipes are ...
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WO/1992/013929A1 |
A method for inhibiting fouling in an organic process stream by adding certain oximes, hydrazine, erythorbic acid, carbohydrazide, or mixtures thereof. The antifoulant is added to the organic stream as an aqueous solution.
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WO/1992/012220A1 |
A used lubricant oil recycling process is disclosed in which a used lubricating oil is injected to delayed coker drums (16, 17) downstream of the coker furnace (15a) whereby the used oil is thermally cracked into hydrocarbon fuel product...
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WO/1992/011931A1 |
In a method for manufacturing one or more chemicals, a chemical reaction is carried out by circulating one or more reagents inside a tube (2-9) located in the radiation zone of an oven (1). At least a part of the tube is vibrated to limi...
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WO/1992/008773A1 |
Described is a process for recovering sulphurated styrene residues obtained in the purification of styrene produced by catalytic dehydrogenation of ethylbenzene, which comprises mixing said residues with a gasoil and subjecting the resul...
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WO/1992/000139A1 |
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 withi...
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WO/1991/017230A1 |
A process for the production of gaseous olefins which involves introducing a hydrocarbon feedstock stream into a high temperature thermal cracking zone to produce a high temperature cracked product stream, quenching the cracked product s...
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WO/1991/014754A1 |
A two-step process for the production of large quantities of heartcut distillate resin precursors from steamed cracked gas oil product which involves hydrogenation of the steam cracked gas oil followed by steam cracking of the hydrogenat...
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WO/1991/013532A1 |
The invention relates to a plasmatron and to a process for stable operation of plasmatrons with steam as the plasma gas in which the fluctuations in operation typical of steam plasmas and the increased electrode erosion are prevented. To...
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WO/1991/012298A1 |
By continuously or intermittently adding amounts of magnetically active moieties, e.g. iron compounds, over time so that the moiety deposits on a catalyst or sorbent in a fluid catalytic cracker or similar circualting hydrocarbon convers...
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WO/1991/005031A1 |
Hydrocarbon vapocracking installation comprising at least one hydrocarbon cracking furnace, an indirect quenching exchanger for the effluents coming out of the furnace, direct quenching means for those effluents and means (36, 38) for in...
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WO/1991/004308A1 |
A method for the thermal cracking of hydrocarbons and other liquid/vapour processes, in which method the liquid feed is heated, and led to a reaction vessel (14) that is in an essentially horizontal position, in which, due to the large f...
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WO/1991/004307A1 |
Petroleum refinery waste stream sludges are recycled by segregating the sludges according to their oil content. Sludges of high oil content are developed and then injected into a delayed coking unit during the coking phase so that they a...
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WO/1991/003527A1 |
Methods for converting by vapor-cracking at high temperature and in the presence of a diluted fluidized phase of essentially heat-conveying particles, on the one hand at least one light hydrocarbon charge which is little contaminated by ...
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WO/1991/003444A1 |
The method provides for heating a hydrocarbon raw material, its pyrolysis at a temperature of 600-800 �C in the presence of intermediate products of hydrogen and oxygen combustion which are produced in the flame torch and are fed along...
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WO/1991/002195A1 |
An apparatus including a chamber having a casing partly or wholly comprising a heat exchanger (1, 2, 3) for preheating air before the air is supplied to at least one burner (7). The heat exchanger (1, 2, 3) is composed of at least one he...
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WO/1990/015118A1 |
A process and device for the vapour-phase cracking of hydrocarbons in a furnace (10) with rectilinear monopass tubes (12) which are connected to each other at their outlet end by a collector (18). In said collector a limited pre-quenchin...
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WO/1990/015119A1 |
Process and reactor for the thermal cracking of a charge containing at least one hydrocarbon with at least one carbon atom, in which the charge is circulated in a metal reaction zone which includes a pyrolysis zone whose external wall is...
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WO/1990/012851A1 |
In a process for decoking the inner walls of a hydrocarbon steam-craking installation, very small particles are injected into the charge of hydrocarbons circulating in the tubes (12) of the steam-cracking furnace (10) and in the indirect...
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WO/1990/012852A1 |
In a process for steam-cracking hydrocarbons in a steam-cracking furnace (10) with tubes (12) which is connected to means (16) for indirect quenching of the gaseous effluents leaving the furnace, a layer of hard coke is allowed to form o...
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WO/1990/009426A1 |
The process is operated in such a way that, during cracking, the temperature is 400 to 450°C and preferably some 420°C, the pressure is 17 to 27 bar and preferably some 22 bar and the cracking process takes between 6 minutes and 10 hou...
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WO/1990/006351A1 |
An improved process for vaporizing a crude petroleum feedstock, preferably one boiling in the vacuum gas oil range or higher, prior to thermal cracking to olefins (8), wherein such feedstock is preheated (2, 3), in one or more stages, in...
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WO/1990/005125A1 |
A hydrocarbon feed is pyrolyzed by direct contact between the feed and solid particles, which are passed through a dilute phase transport reactor, in plug flow, with the feed and solids being passed through the pyrolysis zone in either h...
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WO/1990/002783A1 |
A method of and an apparatus for decomposing a low quality material by withdrawing a low quality material, which contains a large quantity of heavy fractions, such as a high boiling point fraction and an evaporation residual fraction, fr...
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WO/1989/004357A1 |
A method for removing furfural-derived coke from metallic surfaces by heating in an oxygen-containing gas, such as air, for a time and at a temperature sufficient to change the crush strength of the furfural coke to a point which will pe...
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WO/1988/008872A1 |
Poisoning of a cracking catalyst by contaminant metals such as nickel, vanadium and iron during fluid catalytic cracking of hydrocarbon charge stock containing the contaminant metals is suppressed by depositing minor amounts of a bismuth...
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WO/1988/003942A1 |
A process for cracking petroleum hydrocarbon oil by heating, which comprises adding at most 1 part by weight of an active mercapto group-containing organic compound to 100 parts by weight of a petroleum hydrocarbon oil and distilling the...
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WO/1987/005043A1 |
Apparatus and process for compressing and quenching a cracked gas stream from a hydrocarbon cracking furnace (30) including the step of feeding furnace output directly into an ejector (20) in the effluent line the ejector acting to quenc...
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WO/1987/004179A1 |
Fouling of equipment used for processing of organic feed streams containing olefinic compounds is controlled by inhibiting polymerization of the olefinic compounds by carrying out the processing in the presence of from about 20 ppb to le...
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WO/1987/000546A1 |
Improved process for the vapocracking of hydrocarbons, intended to produce more particularly ethylen and propylen. The process is based on the utilisation of a multichannel system made of ceramic material wherein the channels or the rang...
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WO/1987/000547A1 |
To convert petroleum processing residue into higher-grade petroleum products, such as light-fraction distillates, natural gas is made reactive in an oven (4) by radical formation of the hydrocarbon components, then added in the reactive ...
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WO/1986/005801A1 |
Methane and liquid hydrocarbon feeds boiling above 350oC are reacted by feeding finely divided droplets into hot gas at not more than 2 MPa containing at least 50% volume methane and not more than 15% volume hydrogen.
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WO/1986/002376A1 |
Process for the production of olefins from heavy oils. Heavy feed is first cracked at high temperatures and low residence times then separated into three fractions of light, medium and heavy oils. The light and medium fractions are crack...
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WO/1985/004182A1 |
A process for pretreating residual oil and subsequently catalytically cracking the same as depicted in figure 2. Said process comprising introducing the hydrocarbon feed (20) into reaction zone (6) of the pretreatment zone wherein the fe...
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WO/1984/003516A1 |
A method for desulfurization, denitrification, and oxidation of carbonaceous fuels including a two stage oxidation technique. The carbonaceous fuel, containing ash, along with an oxygen-containing gas is introduced into a first stage par...
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WO/1984/001581A1 |
Process for the production of enhanced benzene, toluene, xylene (BTX) yields from heavy hydrocarbon. A heavy hydrocarbon, such as kerosene or heavier hydrocarbon, is partially cracked in a conventional pyrolysis furnace. At the same time...
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WO/1984/001310A1 |
Process and apparatus for cracking light hydrocarbon feedstock and heavy hydrocarbon feedstock in a combined system. The light hydrocarbon feedstock is completely cracked while the heavy hydrocarbon feedstock is partially cracked with a ...
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WO/1984/000035A1 |
A procedure for thermal cracking of hydrocarbons. In the procedure, the hydrocarbons are heated to reaction temperature and conducted into the reaction zone, where the flow is upward from below. The fluid/gas mixture is by the aid of a h...
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WO/1984/000036A1 |
Procedure for thermal cracking of hydrocarbons. In the procedure the hydrocarbons are heated to reaction temperature and conducted into a reaction zone, where the flow is upward from below. The reaction zone (17) is formed of a pressure ...
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WO/1980/002149A1 |
The recovery of oil and/or gas from carbonaceous material is becoming more and more important. The present method relates to the treatment of carbonaceous materials by pyrolysis and/or gasification, in which material is charged in molten...
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WO/1980/002151A1 |
A process for conversion of a carbonaceous feed material (2) into gaseous products, comprising the steps of: contacting a carbonaceous feed material with a molten mass medium in the lower section of a substantially vertical, elongated re...
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WO/1980/001568A1 |
Very fine chromic oxide is dispersed in a high sulfur petroleum coker feedstock (24) before delayed coking (28, 28A) to produce a needle coke with low CTE and negligible puffing on heating to the temperature of graphitization.
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WO/1980/001569A1 |
Very fine particle size iron oxide or calcium fluoride is dispersed in a high sulfur petroleum coker feedstock (24) before delayed coking (28, 28A) to produce a needle coke with low CTE and negligible puffing on heating to the temperatur...
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JP7490363B2 |
Systems and methods for steam and catalytic cracking of a hydrocarbon inlet stream comprising hydrocarbons. Systems and methods can include a catalyst feed stream, where the catalyst feed stream comprises a fluid and a heterogeneous cata...
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JP2024071365A |
A method and apparatus for refining waste plastic pyrolysis oil is provided. [Solution] A method for refining waste plastic pyrolysis oil is provided, which includes the steps of: charging a waste plastic pyrolysis oil feedstock 1 into a...
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JP7480342B2 |
Systems and methods for efficient on-line pigging of a coker furnace without interruption of the delayed coking process, which will save time and money during the delayed coking process. This system can be retrofitted to existing coker f...
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JP7471415B2 |
The present disclosure relates to a method for upgrading liquefied waste plastics, the method including a step (A) of providing liquefied waste plastics (LWP) material, optionally a step (B) of pre-treating at least part of the liquefied...
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