Control system for an acetic acid manufacturing process
    2.
    发明授权
    Control system for an acetic acid manufacturing process 失效
    醋酸制造工艺控制系统

    公开(公告)号:US5374774A

    公开(公告)日:1994-12-20

    申请号:US186747

    申请日:1994-03-11

    申请人: Shinya Ochiai

    发明人: Shinya Ochiai

    IPC分类号: C07C51/12

    CPC分类号: C07C51/12

    摘要: 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.

    摘要翻译: 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。

    Control of anaerobic filter
    4.
    发明授权
    Control of anaerobic filter 失效
    厌氧过滤器的控制

    公开(公告)号:US4450074A

    公开(公告)日:1984-05-22

    申请号:US408088

    申请日:1982-08-13

    申请人: Shinya Ochiai

    发明人: Shinya Ochiai

    IPC分类号: C02F3/00 C02F3/28 C02C1/02

    摘要: The operation of an anaerobic methanogenic filter is controlled by measuring the rates at which oxygen demand (O.D.) is fed to the anaerobic filter and at which methane is generated by the filter, estimating therefrom the O.D. of the effluent of the anaerobic filter and controlling the feed rate to the anaerobic filter in accordance with that estimated value. Also disclosed is a means for eliminating long term bias that may be present in the signals fed from sensors to the circuit used for estimating the value of a variable of a process.

    摘要翻译: 厌氧甲烷生成过滤器的操作通过测量将氧需求(O.D.)供给到厌氧过滤器并且通过过滤器产生甲烷的速率来控制,从其估算O.D. 的厌氧过滤器的流出物,并根据该估计值控制进入厌氧过滤器的进料速率。 还公开了一种用于消除可能存在于从传感器馈送到用于估计过程变量的值的电路的信号中的长期偏差的装置。

    Control system for acetic acid manufacturing process
    5.
    发明授权
    Control system for acetic acid manufacturing process 失效
    乙酸制造工艺控制系统

    公开(公告)号:US5352415A

    公开(公告)日:1994-10-04

    申请号:US129971

    申请日:1993-09-29

    申请人: Shinya Ochiai

    发明人: Shinya Ochiai

    摘要: 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.

    摘要翻译: 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。

    Catalyst activity control in process for converting an alkene to a
carbonyl derivative in the presence of a noble metal and redox agent
    6.
    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 失效
    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

    公开(公告)号:US3972946A

    公开(公告)日:1976-08-03

    申请号:US182774

    申请日:1971-09-22

    摘要: 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.

    摘要翻译: 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。

    Method of producing parboiled rice and parboiled rice produced by the method
    9.
    发明申请
    Method of producing parboiled rice and parboiled rice produced by the method 审中-公开
    通过该方法生产煮沸米和煮沸米的方法

    公开(公告)号:US20080220145A1

    公开(公告)日:2008-09-11

    申请号:US12073473

    申请日:2008-03-06

    IPC分类号: A23L1/182

    摘要: A method of producing parboiled rice that does not require waste water treatment equipment and that enriches the amount of γ-aminobutyric acid contained in the parboiled rice. The method includes partially milling raw material brown rice, wetting the partially milled rice grains by forced-air using moist air or mist, moisture-tempering the wetted rice grains, steam-boiling the water-tempered rice grains at normal pressure to heat the rice grains with steam, steam-boiling the rice grains heated in the normal pressure steam-boiling process using pressurized steam, cooling the rice grains steamed under pressure in the pressurized steam-boiling step to cool at least a surface of the rice grains, finish milling the rice grains cooled in the cooling step, and drying the finish-milled rice grains.

    摘要翻译: 一种不需要废水处理设备的煮沸米饭的方法,其丰富了经煮沸的米饭中所含的γ-氨基丁酸的量。 该方法包括对原料糙米进行部分研磨,用强力空气湿润空气或雾气润湿部分磨碎的米粒,湿润回水的米粒,在正常压力下蒸煮煮沸的水稻米粒以加热米 蒸煮谷物,蒸煮沸腾的米粒在常压蒸汽煮沸过程中用加压蒸汽加热,冷却在加压蒸汽煮沸步骤中蒸压的米粒,至少冷却米粒表面,精磨 在冷却步骤中冷却米粒,干燥精制米粒。

    Control of anaerobic filter
    10.
    发明授权
    Control of anaerobic filter 失效
    厌氧过滤器的控制

    公开(公告)号:US4349435A

    公开(公告)日:1982-09-14

    申请号:US209813

    申请日:1980-11-24

    申请人: Shinya Ochiai

    发明人: Shinya Ochiai

    摘要: The operation of an anaerobic methanogenic filter is controlled by measuring the rates at which oxygen demand (O.D.) is fed to the anaerobic filter and at which methane is generated by the filter, estimating therefrom the O.D. of the effluent of the anaerobic filter and controlling the feed rate to the anaerobic filter in accordance with that estimated value. Also disclosed is a means for eliminating long term bias that may be present in the signals fed from sensors to the circuit used for estimating the value of a variable of a process.

    摘要翻译: 厌氧甲烷生成过滤器的操作通过测量将氧需求(O.D.)供给到厌氧过滤器并且通过过滤器产生甲烷的速率来控制,从其估算O.D. 的厌氧过滤器的流出物,并根据该估计值控制进入厌氧过滤器的进料速率。 还公开了一种用于消除可能存在于从传感器馈送到用于估计过程变量的值的电路的信号中的长期偏差的装置。