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公开(公告)号：US4217203A
公开(公告)日：1980-08-12
申请号：US974072
申请日：1978-12-28
申请人： Douglas G. Ryan
发明人： Douglas G. Ryan
CPC分类号： C10G73/32
摘要： A continuous autorefrigerant solvent dewaxing process is disclosed wherein a waxy oil is prediluted with a non-autorefrigerative solvent, such as ketone, preferably a mixture of MEK/MIBK, and then passed, at a temperature above its cloud point, to the top of a chilling zone, which is an autorefrigerant chilling zone operating on a continuous basis, and comprises a vertical, multi-staged tower, operating at constant pressure. In this chilling zone, wax is precipitated from the oil to form a waxy slurry and the so-formed slurry is further chilled down to the wax filtration temperature by stagewise contact with liquid autorefrigerant preferably propylene, which is injected into a plurality of said stages and evaporated therein so as to cool the waxy slurry at an average rate of between about 0.1.degree. to 20.degree. F. per minute with an average temperature drop across each stage of between about 2.degree. and 20.degree. F. Some of the propylene remains in the oil which serves to further dilute and reduce the viscosity of the slurry. The dewaxed oil-containing slurry may then be fed directly to wax filters without having to pass through scraped-surface chillers and filter feed drum.
摘要翻译： 公开了一种连续的自动制冷剂溶剂脱蜡方法，其中蜡质油用非自动制冷溶剂如酮，优选MEK / MIBK的混合物预稀释，然后在高于其浊点的温度下通过 冷却区，其是连续运行的自动制冷剂冷藏区，并且包括在恒定压力下操作的垂直多级塔。 在该冷却区中，蜡从油中沉淀出来，形成蜡质浆料，并将如此形成的浆料进一步冷却至蜡过滤温度，与液体自动制冷剂（优选丙烯）分阶段接触，该丙烯被注入到多个所述级中， 在其中蒸发，以便以每分钟约0.1至20°F的平均速率冷却蜡状浆料，并且每个阶段的平均温度降至约2°至20°F。一些丙烯保留在 用于进一步稀释和降低浆料粘度的油。 然后可以将脱蜡的含油浆料直接进料到蜡过滤器中，而不必通过刮表面冷却器和过滤进料鼓。
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公开(公告)号：US4216075A
公开(公告)日：1980-08-05
申请号：US974070
申请日：1978-12-28
申请人： Douglas G. Ryan
发明人： Douglas G. Ryan
CPC分类号： C10G73/32
摘要： A continuous, combination ketone-autorefrigerant solvent dewaxing process is disclosed wherein a waxy oil is partially solvent dewaxed to within from about 30.degree. to 110.degree. F. of the final wax filtration temperature in a first chilling zone, preferably comprising a plurality of agitated stages in the presence of a ketone dewaxing solvent to form a slurry containing solid wax particles, partially dewaxed oil and solvent. This ketone-containing slurry is passed to a second chilling zone, which is an autorefrigerant chilling zone, preferably employing liquid propylene operates on a continuous basis, and comprises a vertical, multi-staged tower, operating at constant pressure, wherein additional wax is precipitated from the slurry. In the second chilling zone the slurry is chilled down to the wax filtration temperature by stagewise contact with liquid propylene which is injected into a plurality of said stages and evaporated therein so as to cool the waxy slurry at an average rate of between about 0.1.degree. to 20.degree. F. per minute with an average temperature drop across each stage of between about 2.degree. and 20.degree. F. Some of the propylene remains in the oil which serves to further dilute and reduce the viscosity of the slurry. The dewaxed oil-containing slurry may then be fed directly to wax filters without having to pass through scraped-surface chillers and filter feed drum.
摘要翻译： 公开了一种连续的组合酮 - 自动制冷剂溶剂脱蜡方法，其中将蜡状油部分溶剂脱蜡至第一冷却区域中最终蜡过滤温度的约30至110°F，优选包括多个搅拌阶段 在酮脱蜡溶剂存在下，形成含有固体蜡颗粒，部分脱蜡油和溶剂的浆料。 将含该酮的浆料送入第二冷却区，其是自动制冷剂冷却区，优选采用液体丙烯连续操作，并且包括在恒定压力下操作的垂直多级塔，其中附加的蜡沉淀 从泥浆。 在第二冷却区中，将浆液通过与液体丙烯分阶段接触而冷却至蜡过滤温度，将其注入多个所述阶段并蒸发，以便将蜡质浆料以约0.1至 每分钟20°F，每个阶段的平均温度下降在约2°至20°F之间。一些丙烯保留在油中，用于进一步稀释并降低浆料的粘度。 然后可以将脱蜡的含油浆料直接进料到蜡过滤器中，而不必通过刮表面冷却器和过滤进料鼓。
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公开(公告)号：US4134823A
公开(公告)日：1979-01-16
申请号：US817144
申请日：1977-07-20
申请人： Ralph J. Bertolacini , Dae K. Kim
发明人： Ralph J. Bertolacini , Dae K. Kim
摘要： Disclosed is a catalyst essentially free of platinum, comprising from about 0.1 to about 2 weight percent rhenium and about 0.1 to about 2 weight percent gallium supported on a solid inorganic refractory oxide. A hydrocarbon conversion process, such as catalytic reforming, is also disclosed wherein the process contacts the above described catalyst with a hydrocarbon stream boiling in the range of about 70.degree. F. to about 500.degree. F. and hydrogen. A two-step process is also disclosed wherein a platinum catalyst is first contacted with a hydrocarbon stream to achieve a partial conversion followed by contacting the above described catalyst to achieve further conversion.
摘要翻译： 公开了基本上不含铂的催化剂，其包含负载在固体无机耐火氧化物上的约0.1至约2重量％的铼和约0.1至约2重量％的镓。 还公开了烃转化方法，例如催化重整，其中该方法与上述催化剂接触，沸程为约70°F至约500°F的烃流和氢气。 还公开了两步法，其中铂催化剂首先与烃流接触以实现部分转化，接着与上述催化剂接触以实现进一步的转化。
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公开(公告)号：US4115244A
公开(公告)日：1978-09-19
申请号：US813144
申请日：1977-07-05
CPC分类号： C10G73/32
摘要： A process for dewaxing a waxy petroleum distillate charge stock, wherein a mixture of waxy oil and solvent, heated for dissolving all solid wax therein, is cooled to a first temperature about 40.degree.-50.degree. F (22.degree. to 28.degree. C) above a selected separation temperature, and is held at such first temperature for a period of 1-2 minutes for equilibrating wax crystallization, wherein said oil-solvent mixture, at said first temperature, is cooled to a second temperature about 15.degree.14 20.degree. F (8.degree.-11.degree. C) above said separation temperature and is held at said second temperature for 1-2 minutes for equilibration of wax crystallization, wherein said oil-solvent mixture, at said second temperature, is cooled to said separation temperature, and wherein solid wax is separated from oil-solvent mixture at said separation temperature.
摘要翻译： 将蜡石油馏出物原料脱蜡的方法，其中加热用于溶解所有固体蜡的蜡质油和溶剂的混合物冷却至高于约40°-50°F（22-28℃）的第一温度 选择的分离温度，并且在该第一温度下保持1-2分钟以平衡蜡结晶，其中所述油溶剂混合物在所述第一温度下被冷却至约15°14°F的第二温度 （8°-11℃）高于所述分离温度并保持在所述第二温度1-2分钟以使蜡结晶化，其中所述油溶剂混合物在所述第二温度下被冷却至所述分离温度，和 其中固体蜡在所述分离温度下与油溶剂混合物分离。
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公开(公告)号：US4013542A
公开(公告)日：1977-03-22
申请号：US516625
申请日：1974-10-21
申请人： David A. Gudelis , David H. Shaw
发明人： David A. Gudelis , David H. Shaw
摘要： A dewaxing process is described wherein a waxy petroleum oil stock such as residual or a broadcut feedstock, characterized by containing at least 10% of residual material boiling above about 1000.degree. F., is mixed with at least about 0.3 volumes of a dewaxing solvent per volume of waxy oil stock, thereby depressing the cloud point of same.In one embodiment of the invention, the resultant mixture is introduced into a cooling zone, at a temperature above the depressed cloud point of the oil. Precooled dewaxing solvent is incrementally added to the cooling zone which is divided into a plurality of stages with agitation means present in each of the stages. The resultant solvent-oil mixture is cooled and agitated as it passes through the cooling zone, thereby reducing the temperature of the oil to below its depressed cloud point and precipitating at least a portion of the wax therefrom. An oil stock of diminished wax content is thereafter recovered.In a second embodiment of the invention, the waxy oil stock is introduced into the cooling zone in the absence of solvent at a temperature above the cloud point of the oil. Precooled dewaxing solvent is introduced incrementally into the initial stages of the cooling zone, coming into contact with the waxy oil and depressing its cloud point. The oil is gradually cooled to a temperature no less than the depressed cloud point of the oil whereupon additional precooled dewaxing solvent is added to the oil in the remaining stages of the cooling zone, thereby gradually cooling the oil to a temperature below the depressed cloud point and precipitating at least a portion of the wax therefrom.
摘要翻译： 描述了一种脱蜡方法，其中将含有至少10％沸点高于约1000°F的残余物质的蜡状石油原料如残渣或粗切剂原料与至少约0.3体积的脱蜡溶剂混合， 蜡状油料的体积，从而使浊点相同。
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公开(公告)号：US3972802A
公开(公告)日：1976-08-03
申请号：US584034
申请日：1975-06-05
申请人： James D. Bushnell
发明人： James D. Bushnell
CPC分类号： C10G73/32
摘要： A dewaxing process is provided in which a mixture of a solvent comprising propylene-acetone and a waxy petroleum oil is contacted with a cold aqueous solution of acetone and methanol. The aqueous acetone-methanol solution, which is immiscible in the waxy oil-solvent mixture, cools the mixture thereby crystallizing a substantial portion of the wax in the mixture.
摘要翻译： 提供脱蜡方法，其中包括丙烯 - 丙酮和蜡状石油油的溶剂的混合物与冷的丙酮和甲醇水溶液接触。 在蜡状油溶剂混合物中不混溶的丙酮 - 甲醇水溶液冷却混合物，从而使混合物中大部分蜡结晶。
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公开(公告)号：US3972779A
公开(公告)日：1976-08-03
申请号：US492362
申请日：1974-07-26
申请人： Charles W. Harrison
发明人： Charles W. Harrison
CPC分类号： B01D9/0063 , B01D37/00 , Y10S208/01
摘要： A control system controls the flow rates of waxy oil and solvent entering a dewaxing unit so as to control the viscosity of a chilled slurry mix or waxy oil and solvent provided to a filter in the dewaxing unit. The dewaxing unit includes valves controlling the flow rates of the solvent and waxy oil being provided to the chiller. The filter provides a dewaxed oil and solvent mixture and wax. Using the equation hereinafter mentioned, the control apparatus utilizes the sensed refractive index of the solvent, the sensed viscosity of the waxy oil, the sensed flow rates of the solvent and the waxy oil, and the sensed filtering temperature of the chilled slurry mix to generate a signal corresponding to the viscosity of the slurry mix provided to the filter at the filtering temperature. The viscosity of the chilled slurry mix is controlled within predetermined limits by a generating signal corresponding to the dilution ratio of the solvent to the waxy oil. The dilution signal is used to provide control signals to valves controlling the flow rates of the waxy oil and of the solvent to achieve the desired ratio which results in a desired viscosity of the chilled slurry mix.
摘要翻译： 控制系统控制进入脱蜡装置的蜡质油和溶剂的流速，以便控制冷却的浆料混合物或提供给脱蜡装置中的过滤器的蜡质油和溶剂的粘度。 脱蜡装置包括控制提供给冷却器的溶剂和蜡质油的流量的阀。 过滤器提供脱蜡油和溶剂混合物和蜡。 使用下文所述的方程式，控制装置利用感测的溶剂的折射率，所检测到的蜡状油的粘度，所检测的溶剂和蜡质油的流速，以及感测到的冷却浆料混合物的过滤温度以产生 对应于在过滤温度下提供给过滤器的浆料混合物的粘度的信号。 冷冻浆料混合物的粘度通过对应于溶剂与蜡状油的稀释比的产生信号控制在预定限度内。 稀释信号用于向控制蜡质油和溶剂流速的阀提供控制信号，以实现所需的比例，这导致冷冻浆料混合物的所需粘度。
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公开(公告)号：US3779894A
公开(公告)日：1973-12-18
申请号：US3779894D
申请日：1972-03-13
CPC分类号： C10G73/06
摘要： A dewaxing process is described comprising contacting a waxy lubricating oil with a dewaxing solvent in a chilling zone divided into a plurality of stages. The dewaxing solvent is injected into the chilling zone under conditions such that the solvent and oil are immiscible at the point of injection. At least a portion of the wax is precipitated from the oil and is separated therefrom under conditions such that the solvent and oil are miscible. Solvent injection is at a temperature preferably below 0*F. when the solvent comprises 40 volume percent methylethylketone and 60 volume percent methylisobutylketone.
摘要翻译： 描述了一种脱蜡方法，包括将蜡状润滑油与分解成多个阶段的冷冻区中的脱蜡溶剂接触。 在使得溶剂和油在注射点不混溶的条件下，将脱蜡溶剂注入冷却区。 至少一部分蜡从油中沉淀出来并在溶剂和油是可混溶的条件下从其中分离出来的。 当溶剂包含40体积％甲基乙基酮和60体积％甲基异丁基酮时，溶剂注入的温度优选低于0°F。
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公开(公告)号：US3720599A
公开(公告)日：1973-03-13
申请号：US3720599D
申请日：1971-05-03
发明人： GOULD L
CPC分类号： C10G73/06
摘要： An improved process for dewaxing petroleum oil stocks. Feed oil, with or without a dewaxing solvent, is both mixed and cooled by direct contact with boiling liquid refrigerant, with required residence time in a vessel containing sufficient stages to effect required wax crystal growth.
摘要翻译： 改善石油库存脱蜡工艺。 具有或不具有脱蜡溶剂的进料油通过与沸腾的液体制冷剂直接接触而混合和冷却，所需停留时间在包含足够的阶段的容器中以实现所需的蜡晶体生长。
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公开(公告)号：US4199433A
公开(公告)日：1980-04-22
申请号：US9538
申请日：1979-02-05
CPC分类号： C10G31/00
摘要： Improvements in processes for stripping solvent from dewaxed oils and deoiled waxes; the use of an inert gas (such as nitrogen) as a stripping agent for removing solvent from dewaxed oils, deoiled waxes and slack waxes resultant from solvent dewaxing processes.
摘要翻译： 从脱蜡油和脱蜡中汽提溶剂的方法的改进; 使用惰性气体（例如氮气）作为汽提剂从溶剂脱蜡过程产生的脱蜡油，脱蜡和松散蜡中除去溶剂。
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