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    • 2. 发明授权
    • Control system for an acetic acid manufacturing process
    • 醋酸制造工艺控制系统
    • US5374774A
    • 1994-12-20
    • US186747
    • 1994-03-11
    • Shinya Ochiai
    • Shinya Ochiai
    • C07C51/12
    • C07C51/12
    • A novel control system is provided to control the liquid levels in a reactor-flasher combination used particularly for the carbonylation of methanol to acetic acid. Liquid level control is achieved by proportional controllers or other controllers which do not continuously seek zero offset from the desired level and which proportionally change the liquid flow rates from the respective reactor and flasher. An adjustment can be made to the level controllers to change the liquid flow rates by a function generator which adjusts the flow rate, according to an empirically derived function which correlates changes in methanol feed rate to liquid flow rates from the reactor and flasher. A further adjustment to flow rates can be made to effect a change in the water concentration in the reactor so as to maintain the water concentration at a desired level.
    • 提供了一种新颖的控制系统来控制特别用于将甲醇羰基化成乙酸的反应器 - 闪蒸器组合中的液体水平。 液位控制由比例控制器或其他控制器实现,其不连续地从期望水平寻找零偏移并且相应地从相应的反应器和闪光器改变液体流速。 根据经验导出的将甲醇进料速率的变化与来自反应器和闪光器的液体流速相关联的函数,可以对液位控制器进行调节以通过函数发生器来调节流量的液体流速。 可以进一步调节流速以实现反应器中的水浓度的变化,从而将水浓度保持在期望的水平。
    • 6. 发明授权
    • Control system for acetic acid manufacturing process
    • 乙酸制造工艺控制系统
    • US5352415A
    • 1994-10-04
    • US129971
    • 1993-09-29
    • Shinya Ochiai
    • Shinya Ochiai
    • B01J19/00C07C51/12C07C53/08G05D9/00B01J8/00G08B21/00
    • G05D9/00B01J19/0006C07C51/12
    • A novel control system is provided to control the liquid levels in a reactor-flasher combination used particularly for the carbonylation of methanol to acetic acid. Liquid level control is achieved by proportional controllers or other controllers which do not continuously seek zero off-set from the desired level and which proportionally change the liquid flow rates from the respective reactor and flasher. An adjustment can be made to the level controllers to change the liquid flow rates by a function generator which adjusts the flow rate, according to an empirically derived function which correlates changes in methanol feed rate to liquid flow rates from the reactor and flasher.
    • 提供了一种新颖的控制系统来控制特别用于将甲醇羰基化成乙酸的反应器 - 闪蒸器组合中的液体水平。 液位控制通过比例控制器或其他控制器来实现,该控制器或其他控制器不连续地从期望的水平寻找零偏差,并且从相应的反应器和闪光器成比例地改变液体流速。 根据经验导出的将甲醇进料速率的变化与来自反应器和闪光器的液体流速相关联的函数,可以对液位控制器进行调节以通过函数发生器来调节流量的液体流速。
    • 7. 发明授权
    • Catalyst activity control in process for converting an alkene to a
carbonyl derivative in the presence of a noble metal and redox agent
    • 在贵金属和氧化还原剂存在下将烯烃转化为羰基衍生物的方法中的催化剂活性控制
    • US3972946A
    • 1976-08-03
    • US182774
    • 1971-09-22
    • Shinya OchiaiLeonard Griffith
    • Shinya OchiaiLeonard Griffith
    • B01J19/00B01J19/24C07C45/30C07C45/02
    • C07C45/30B01J19/0006B01J19/242B01J2219/00065B01J2219/00164Y02P20/584
    • In converting an alkene such as ethylene to a carbonyl derivative such as acetaldehyde by a process which comprises passing the alkene through a tubular reactor along with an aqueous acidic catalyst solution comprising a noble metal such as palladium together with a cupric chloride redox agent, followed by separating the carbonyl product from the depleted catalyst solution which is then reoxidized with a source of molecular oxygen such as air prior to being returned to the reactor, continuous depletion of the chloride content of the catalyst solution takes place as a result of the formation of chlorinated reaction by-products. This necessitates replenishment of the chloride content of the catalyst solution by adding hydrochloric acid into a catalyst regeneration zone preceding the catalyst reoxidation step of the process. Over-treating or under-treating with the hydrochloric acid results, however, in occasional process upsets and failure to maintain optimal activity of the catalyst solution and maximum reactor output. The present invention comprises maintaining optimal catalyst activity by adding hydrochloric acid in response to the hydraulic pressure gradient obtaining within the alkene-oxidation reactor, within which a deficiency of acid causes an increasing hydraulic pressure gradient due to fouling of the tubular reactor with precipitated solids. Optimal catalyst activity obtains when the acid addition rate is just sufficient to prevent the inception of a pressure gradient rise due to precipitation of solids within the reactor.
    • 在将乙烯等烯烃转化为羰基衍生物如乙醛的方法中,包括使烯烃与含有贵金属如钯的含水酸性催化剂溶液与氯化铜氧化还原剂一起通过管式反应器,然后 将羰基产物与耗尽的催化剂溶液分离,然后在返回到反应器之前用诸如空气的分子氧源再氧化,催化剂溶液的氯化物含量的连续消耗是由于形成氯化物 反应副产物。 这需要通过在催化剂再氧化步骤之前的催化剂再生区中加入盐酸来补充催化剂溶液的氯化物含量。 然而,用盐酸过度处理或处理不良会导致偶尔的过程紊乱,并且不能保持催化剂溶液的最佳活性和最大的反应器输出。 本发明包括通过在烯烃 - 氧化反应器内获得的液压梯度下加入盐酸来保持最佳的催化剂活性,其中由于具有沉淀固体的管式反应器的结垢,酸的不足导致增加的液压梯度。 当酸添加速率恰好足以防止由于反应器内的固体沉淀引起的压力梯度升高时,获得最佳催化剂活性。