摘要:
Moving bed hydrocarbon conversion processes are disclosed wherein a carbonaceous material is deposited on a solid catalyst used in the conversion process to form a coked catalyst which is regenerated in a regeneration zone in order to remove the carbonaceous deposit material from the catalyst and provide a regenerated catalyst having an increased number of active catalyst sites relative to the coked catalyst. The regenerated catalyst is then added to the reaction zone at a rate effective to enhance the conversion to desired products without enhancing the conversion to undesired by-products. When a radial flow reaction zone is employed a relatively constant amount of active catalyst sites can be maintained through the reaction zone by increasing the thickness of annulus through which the catalyst flows in the lower section of the reaction zone wherein the catalyst is more severely coked and has fewer active catalyst sites. The conversion of aliphatic hetero compounds, such as methanol to produce olefins in the C.sub.2 -C.sub.4 carbon range is specifically exemplified.
摘要:
Enhanced recovery of crude oil from an oil well is provided by in-situ cracking of an oxygenated organic compound to form hydrogen. The crude oil is then hydrogenated and hydrogenation reaction products and crude oil are recovered from the oil well.
摘要:
Enhanced recovery of crude oil from an oil well is provided by in-situ cracking of an oxygenated organic compound to form hydrogen. The crude oil is then hydrogenated and hydrogenation reaction products and crude oil are recovered from the oil well.
摘要:
One exemplary embodiment can be a hydroprocessing method. The hydroprocessing method can include providing a feed and a stream including hydrogen to a vessel. The vessel may have a catalyst collector and an internal riser. Generally, a catalyst circulates within the vessel by at least partially rising within the internal riser.
摘要:
A process for the production of C.sub.8 and higher olefins by the oligomerization of light olefins to heavier olefins is improved by the addition of cycloparaffins to the oligomerization zone. The recycle of the cycloparaffins extends the catalyst activity and improves the catalyst life. Cyclohexane provides an excellent solvent for removing deposits from the catalyst with chemical inertness to the process and a boiling range that allows its essentially complete recovery when producing nonenes and higher olefins from propylene feeds.
摘要:
Paraffins and other hydrocarbons are alkylated using a solid bed catalyst in a process featuring a reaction zone operated at mixed-phase conditions which allow the heat of reaction to vaporize a portion of the liquid phase feed hydrocarbon passing downward through it thus facilitating recycling of the feed hydrocarbon. The feed hydrocarbon recovered from the reaction zone effluent is recycled as a liquid, preferably admixed with hydrogen, with the feed olefin being preferably introduced near the top of the reactor as a vapor. The catalyst preferably contains a metal hydrogenation function effective to selectively hydrogenate C.sub.6 -plus olefins produced as by-products.
摘要:
Potential problems associated with the formation of polynuclear aromatic compounds during hydrocracking of residual oils are eliminated by operating at high conversion rates with a high hydrogen concentration followed by a unique separation method. The feed to the final product recovery column is highly vaporized. All of the net bottoms stream of the product recovery column, which is equal to less than 5 vol. percent of the feed, is withdrawn from the process. Only PNA free distillate is recycled.
摘要:
This invention relates to a process for sweetening a sour hydrocarbon fraction containing mercaptans. The process involves contacting the hydrocarbon fraction in the presence of an oxidizing agent with a catalytic composite, ammonium hydroxide and a quaternary ammonium hydroxide. There is a synergistic effect between the ammonium hydroxide and the quaternary ammonium hydroxide. Use of ammonium hydroxide instead of an alkaline hydroxide allows the waste stream to be re-used in other parts of the refinery, and allows for easier disposal of the waste stream.
摘要:
A process for the conversion of an aromatic-rich, distillable gas oil charge stock which is essentially free from asphaltenic hydrocarbons and possesses an aromatic hydrocarbon concentration greater than about 20 volume percent to selectively produce large quantities of high quality middle distillate while minimizing hydrogen consumption which process comprises the steps of: (a) reacting the charge stock with hydrogen, in a catalytic hydrocracking reaction zone, at hydrocracking conditions including a maximum catalyst bed temperature in the range of about 600.degree. F. (315.degree. C.) to about 850.degree. F. (454.degree. C.) selected to convert at least a portion of the charge stock to lower-boiling hydrocarbon products including middle distillate and to convert at least 10 volume percent of the aromatic hydrocarbon compounds contained in the charge stock to provide an increased concentration of paraffin hydrocarbon compounds in the resulting hydrocracking reaction zone effluent; (b) separating the resulting hydrocracking reaction zone effluent to provide a middle distillate product stream and a paraffin-rich hydrocarbonaceous stream boiling at a temperature greater than about 700.degree. F. (371.degree. C.); (c) recovering the middle distillate product stream; (d) reacting the paraffin-rich hydrocarbonaceous stream recovered in step (b) in a thermal coking zone at mild thermal coking conditions including an elevated temperature from about 750.degree. F. (399.degree. C.) to about 950.degree. F. (510.degree. C.), a pressure from about 10 psig (69 kPa gauge) to about 150 psig (1034 kPa gauge) and a combined feed ratio from about 1 to about 2 to provide a thermal coking zone effluent; and (e) separating the thermal coking zone effluent to provide a fraction boiling in the range from about 300.degree. F. (149.degree. C.) to about 700.degree. F. (371.degree. C.).
摘要:
A method for the in situ conversion and recovery of heavy hydrocarbonaceous crude oil containing indigenous trace metal from two adjacent non-communicating hydrocarbon reservoirs which are alternately pressured and recovered which method comprises: (a) heating the heavy hydrocarbonaceous crude oil in a first reservoir to a hydrocarbon conversion temperature; (b) contacting the first reservoir with elemental essentially-anhydrous hydrogen at a pressure from about 200 to about 10,000 psig; (c) heating the heavy hydrocarbonaceous crude oil in a second reservoir to a hydrocarbon conversion temperature; (d) depressuring the first reservoir to yield an effluent comprising hydrocarbonaceous crude oil and unreacted elemental hydrogen; (e) separating the effluent from the first reservoir to recover a hydrocarbonaceous crude oil and a gaseous component comprising elemental hydrogen; (f) contacting the second reservoir with elemental essentially-anhydrous hydrogen, a portion of which is recovered in step (e), at a pressure from about 200 to about 10,000 psig; and (g) depressuring said second reservoir to yield an effluent comprising hydrocarbonaceous crude oil and unreacted elemental hydrogen.