摘要:
A process and apparatus for direct coking of tar sands which includes contacting the tar sand with heat transfer particles resulting from combustion of coked sand effluent from the coking process, and transporting the combination up a riser/mixer to a coking vessel whereby separation of oil and hydrocarbon gases from the sand is initiated. The tar sand is introduced into a fluid coking vessel which has at least two coking zones. The first coking zone is substantially at the top of the vessel whereas the second coking zone is immediately below the first coking zone and includes a stream of hot spent sand so that a more severe coking temperature is present in the second coking zone. A product stream of oil and light hydrocarbon gases, recovered from the riser/mixer and coking process, is directed to a separator located above said coking vessel in which the heavy oil is removed and preferably directed to the second coking zone.
摘要:
A method and system for cracking hydrocarbons with distinct fluid catalyst particles differing in activity, selectivity and physical characteristics is described wherein a common catalyst regeneration system is employed which will measurably contribute to the heat requirements of the operation as well as the activity/selectivity characteristics of the catalyst employed. Except for size, the catalysts upon make-up may have different or identical catalytic characteristics. However, upon contact with a particular hydrocarbon stream, such as vacuum resid, the selectivity and coke producing characteristics of the catalysts may be altered.
摘要:
Disclosed is a method and apparatus for conversion of LPG hydrocarbons into distillate fuels by integrating LPG dehydrogenation with catalytic oligomerization and recovering the distillates produced. The described method and apparatus may comprise an H.sub.2 separation zone, wherein a lean oil stream contacts a dehydrogenation effluent stream to produce a C.sub.3.sup.+ rich liquid stream to feed oligomerization. An energy efficient separation zone comprising dual debutanizers is disclosed. In addition, a method and apparatus is disclosed for a fluid bed dehydrogenation reactor zone using an FCC catalyst contaminated with a metal, such as nickel and/or vanadium.
摘要:
A process for the catalytic devolatilization of coal is disclosed wherein a selected mixture of preheated coal particles and hot catalyst solids is contacted with a gaseous material such as steam and/or a hydrogen-containing gas to form a high temperature suspension in a riser reactor to obtain a high initial rate of heat transfer from high temperature catalyst particles to coal particles thereby promoting high yields of devolatilized liquid hydrocarbon product. Morever, the quality of the devolatilized material is improved by the hot catalytic solids which either convert devolatilized tars and phenols to more desirable products or prevent tar and phenol formation by catalytic interception of the initial products devolatilized from the coal. Char produced by this devolatilization technique is particularly suited for subsequent gasification and other use.
摘要:
A process for introducing a exothermic reactant vapor stream to an adiabatic catalyst zone comprising the steps of: preheating a volatile liquid exothermic reactant stream below its autogenous temperature under process pressure; contacting the preheated liquid reactant stream in a saturator unit with a hot diluent gas to vaporize the reactant stream in gaseous mixture with the diluent stream; directing the gaseous mixture from the saturator unit to the catalyst zone for exothermic conversion of the reactant under substantially adiabatic reaction conditions in the presence of diluent gas; recovering reaction products and diluent gas from the catalyst zone; separating diluent gas from the products, compressing and recycling the diluent gas to the saturator unit. Methods and apparatus are provided for use in a continuous catalytic MTG process for making gasoline boiling range hydrocarbons exothermically from a methanol-containing reactant stream diluted with a methane-rich recycle gas stream by contacting the diluted feedstock with a fixed bed of crystalline aluminosilicate zeolite catalyst in an adiabatic reaction zone at elevated temperature and pressure.The recycle gas may be contacted with the liquid feedstock in a counter-current vertical tower operatively connected through an upper gas outlet to the reaction zone and wherein liquid feedstock flows downwardly under gravity through a saturation zone.
摘要:
A methanol-to-gasoline conversion process in which the conversion is conducted in a number of reactors which are fed directly by the charge, preferably in equal proportions. A diluent gas, preferably recycled light hydrocarbons separated from the product, is passed in sequence through each of the beds to carry away the heat of reaction. In this way, a high effective recycle ratio is maintained in each bed although the actual recycle ratio for the entire system is low.
摘要:
A process for introducing exothermic reactant vapor stream to an adiabatic catalyst zone comprising the steps of: preheating a volatile liquid exothermic reactant stream below its autogenous temperature under process pressure; contacting the preheated liquid reactant stream in a saturator unit with a hot diluent gas to vaporize the reactant stream in gaseous mixture with the diluent stream; directing the gaseous mixture from the saturator unit to the catalyst zone for exothermic conversion of the reactant under substantially adiabatic reaction conditions in the presence of diluent gas; recovering reaction products and diluent gas from the catalyst zone; separating diluent gas from the products, compressing and recycling the diluent gas to the saturator unit. Methods and apparatus are provided for use in a continuous catalytic MTG process for making gasoline boiling range hydrocarbons exothermically from a methanol-containing reactant stream diluted with a methane-rich recycle gas stream by contacting the diluted feedstock with a fixed bed of crystalline aluminosilicate zeolite catalyst having a silica to alumina ratio of at least 12 and a constraint index of about 1 to 12 in an adiabatic reaction zone at elevated temperature and pressure. The improved MTG system includes contacting compressed recycle gas with preheated liquid feedstock at a temperature substantially below the autogenous temperature of methanol under process conditions to vaporize methanol into the recycle gas stream, thereby providing methanol vapor tot he catalyst bed only in the presence of diluent gas.The recycle gas may be contacted with the liquid feedstock in a counter-current vertical tower operatively connected through an upper gas outlet to the reaction zone and wherein liquid feedstock flows downwardly under gravity through a saturation zone.
摘要:
Disclosed is a process and apparatus for fluid catalytic cracking (FCC). Output of an FCC riser feeds a riser cyclone. A downstream end of the riser and the riser cyclone are located within a reactor vessel (disengaging vessel) having sidewalls. Cracked hydrocarbons in the output pass from the riser into a riser cyclone and discharge from the reactor vessel without being added to a reactor vessel atmosphere. A stripper cap divides the reactor vessel atmosphere into upper and lower portions. The stripper cap and a lower portion of the reactor vessel sidewalls define a stripping zone. A riser cyclone dipleg extends through an opening in the stripper cap into the stripping zone. A chimney vent conduit is provided for conducting stripped hydrocarbons out of the stripping zone without being added to the atmosphere of the reactor vessel above the stripper cap.
摘要翻译:公开了用于流化催化裂化(FCC)的方法和装置。 FCC提升管的输出供给立管旋风分离器。 提升管和提升管旋风分离器的下游端位于具有侧壁的反应器容器(分离容器)内。 输出中的裂解烃从提升管通入立管旋风分离器,并从反应器容器中排放而不加入反应堆容器气氛。 剥离器盖将反应堆容器气氛分成上部和下部。 汽提器盖和反应器容器侧壁的下部限定汽提区。 提升式旋风one di g extends extends extends extends extends。。。。。。。。。。。。 提供了烟囱排气导管,用于将汽提的碳氢化合物带出汽提区,而不会被添加到汽提塔上方的反应堆容器的气氛中。
摘要:
A continuous process and system is provided for a petroleum oil in a multi-phase fixed bed catalytic reactor column comprising methods and means for:feeding the oil and a reactant gas at production flow rates above a first bed of porous solid catalyst particles under conversion conditions for cocurrent downward flow therethrough, collecting and withdrawing the treated oil from the first bed and redistributing at least a portion of the treated oil to at least one succeeding catalyst bed while permitting the gaseous phase to flow directly to the succeeding lower catalyst bed, recycling a quantity of treated oil collected below a catalyst bed and reapplying the treated oil at a preceding redistribution zone above the bed from which treated oil is collected, whereby the total of oil production flow rate and recycled treated oil flow rate is maintained at a predetermined minimum sufficient to effect uniform catalyst wetting. This technique is useful for hydrodewaxing of oils over zeolite catalysts.
摘要:
The conversion of methanol to gasoline boiling hydrocarbons in a thermally balanced operation with a special group of zeolite catalysts having a constraint index of 1 to 12, a silica to alumina ratio of at least about 12 and a crystal density of not substantially lower than about 1.6 grams per cubic centimeter is described. The steady state operation of the process is improved by feeding methanol preheated to a selected temperature proximate to its boiling point so that the heat required thereafter to vaporize the feed and to raise its temperature to conversion temperature is substantially equal to the exothermicity of the conversion itself.