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    • 1. 发明授权
    • Control method for solvent refining lubricating oils
    • 溶剂精炼润滑油的控制方法
    • US5242579A
    • 1993-09-07
    • US678089
    • 1991-04-01
    • Theodore C. MeadAvilino Sequeira, Jr.
    • Theodore C. MeadAvilino Sequeira, Jr.
    • C10G21/30
    • C10G21/30C10G2400/10
    • In a solvent refining process a naphthenic lubricating oil feedstock is solvent extracted to yield a primary aromatics-lean raffinate and a primary aromatics-rich extract. Polynuclear aromatic content of primary raffinate is controlled by manipulating extraction temperature and solvent dosage. Primary extract is separated (settled) to form a secondary raffinate and a secondary extract. Secondary raffinate is recycled to solvent extraction. The refractive index of secondary raffinate is controlled by manipulating settling temperature and antisolvent dosage. The refractive index of secondary raffinate is maintained at or below the refractive index of feedstock. An improved yield of primary raffinate of a specified polynuclear aromatic content is achieved.
    • 在溶剂精制过程中,将环烷润滑油原料溶剂萃取,得到一级芳烃贫残余液和富含芳烃的初级萃取物。 主要萃余液的多核芳烃含量通过操作提取温度和溶剂用量来控制。 将主要提取物分离(沉降)以形成二级萃余液和二级提取物。 将二次萃余液再循环至溶剂萃取。 二次萃余液的折射率通过操纵沉降温度和反溶剂剂量来控制。 二次提余液的折射率维持在原料的折射率以下。 实现了特定多核芳烃含量的初级萃余液的提高的产率。
    • 3. 发明授权
    • Control means and method for solvent refining unit
    • 溶剂精炼装置的控制方法和方法
    • US4866632A
    • 1989-09-12
    • US121693
    • 1987-11-16
    • Theodore C. MeadBetty J. Morris
    • Theodore C. MeadBetty J. Morris
    • C10G21/30
    • C10G21/30
    • The control system and method of the present invention controls a solvent refining unit which treats charge oil with a solvent in a refining tower to yield raffinate and extract-mix, strippers separate the solvent from the raffinate and from the extract-mix to provide refined waxy oil and extract oil, respectively. The solvent is returned to the tower and the refined waxy oil is subsequently dewaxed to provide refined oil. The present invention includes a device which senses the flow rate of the charge oil and provides a corresponding charge oil flow rate signal. The flow rate of the charge oil is controlled in accordance with the charge oil flow rate signal and a control signal. The temperature of the extract oil is sensed and a corresponding temperature signal provided. The temperature signal is used in controlling the temperature of the extract oil in cooperation with a second control signal. A parameter related to the quality of the charge oil and the refined oil and the extract-mix is sensed and corresponding parameter signals provided. A computer provides the first control signal to control the charge oil flow rate and the second control signal to control the temperature in accordance with the sensed charge oil flow rate, the extract oil temperature and the sensed quality parameter signals to achieve an optimum charge oil flow rate-yield operating condition.
    • 本发明的控制系统和方法控制一种溶剂精制装置,其在澄清塔中用溶剂处理电荷油以产生萃余液和萃取 - 混合物,汽提塔将溶剂与萃余液和提取物混合物分离,以提供精制蜡质 油和提取油分别。 溶剂返回塔中,精制的蜡质油随后脱蜡以提供精制油。 本发明包括检测充电油的流量并提供相应的充电油流量信号的装置。 充油的流量根据充油流量信号和控制信号进行控制。 检测提取油的温度并提供相应的温度信号。 温度信号用于与第二控制信号协同控制提取油的温度。 检测与充电油,精炼油和萃取混合物质量相关的参数,并提供相应的参数信号。 计算机提供第一控制信号以控制充电油流量和第二控制信号,以根据感测的充电油流量,提取油温度和感测质量参数信号来控制温度,以实现最佳充电油流 速率收益率操作条件。