公开(公告)号：US10894764B2

公开(公告)日：2021-01-19

申请号：US16494710

申请日：2018-03-06

Applicant: TOYO ENGINEERING CORPORATION

Inventor： Shuhei Nakamura ,  Akiko Sugiura ,  Keigo Sasaki

IPC: C07C273/16 ,  B01J2/00 ,  C07C275/00

Abstract: Precipitation of an ammonium salt is prevented while suppressing an increase in water content of the aqueous urea solution which is to be supplied to a urea granulation step, when recovering and using urea and NH3 in a gas which contains urea dust and NH3 and which arises from a urea granulation step.

公开(公告)号：US10730761B2

公开(公告)日：2020-08-04

申请号：US16208332

申请日：2018-12-03

Applicant: TOYO ENGINEERING CORPORATION

Inventor： Keigo Sasaki

IPC: B01D19/00 ,  B01D3/14 ,  B01D3/38 ,  B01D53/58 ,  B01D53/78 ,  C01C1/28 ,  C02F1/02 ,  C02F1/20 ,  C02F1/66 ,  C07C273/02 ,  B01D3/00 ,  C02F101/16 ,  C02F103/36

Abstract: Disclosed are: a treatment method comprising (1) a step in which an aqueous solution containing urea, ammonia and carbon dioxide is introduced into a first stripper (PCS1) and subjected to stripping, and the aqueous solution after stripping is introduced into a urea hydrolyzer (UHY), (2) a step in which urea in the aqueous solution is hydrolyzed in the urea hydrolyzer (UHY), and the aqueous solution after hydrolysis is introduced into a second stripper (PCS2), (3) a step in which the aqueous solution is subjected to stripping in the second stripper (PCS2), and (4) a step in which a part of the aqueous solution before being stripped in the first stripper (PCS1), and/or, a part of the aqueous solution after being stripped in the first stripper (PCS1) but before being hydrolyzed in the urea hydrolyzer (UHY) is introduced into an exhaust gas treatment equipment equipped with an ammonia scrubbing equipment (ASCR); and a treatment equipment therefor.

公开(公告)号：US20190136141A1

公开(公告)日：2019-05-09

申请号：US16168593

申请日：2018-10-23

Applicant: TOYO ENGINEERING CORPORATION

Inventor： Shoichi YAMAGUCHI ,  Yasuyuki Yamamori ,  Xiaoxue Zhang

IPC: C10G5/06 ,  C10G5/04 ,  F25J3/02

Abstract: Provided are an apparatus and a method for separation and recovery of propane and heavier hydrocarbons from LNG. The apparatus has, from the upstream side toward the downstream side of LNG supply, first column (3) equipped with first column overhead condenser (2), first column bottom reboiler (4) and side reboiler (5), and second column (14) equipped with second column overhead condenser (11) and second column bottom reboiler (15). The first column (3) separates methane and a part of ethane as an overhead vapor and separates remaining ethane and C3 or higher hydrocarbons as a bottom liquid. The second column (14) separates ethane as an overhead vapor and separates C3 or higher hydrocarbons as a bottom liquid.

公开(公告)号：US20180258033A1

公开(公告)日：2018-09-13

申请号：US15758285

申请日：2016-08-31

Applicant: Toyo Engineering Corporation

Inventor： Maghfuri BAHARUDDIN ,  Genshi NISHIKAWA ,  Haruyuki MORIKAWA

IPC: C07C273/04 ,  B01J19/24

CPC classification number: C07C273/04 ,  B01J19/2415 ,  B01J2219/00081 ,  B01J2219/24

Abstract: Method and apparatus that enable the more efficient manufacture of urea are provided. Before unreacted substances are removed from a urea synthesis solution obtained from a stripper, the urea synthesis solution is placed under pressure reduced from the synthesis pressure. Thus, a gas-liquid mixture is obtained. The gas-liquid mixture is heated with a decomposed gas from the stripper using a shell-and-tube heat exchanger, and then introduced into a purification system. In the heating, the gas-liquid mixture is introduced into the shell of the heat exchanger while the decomposed gas is introduced into the tube side of the heat exchanger.

公开(公告)号：US09573866B2

公开(公告)日：2017-02-21

申请号：US14076825

申请日：2013-11-11

Applicant: TOYO ENGINEERING CORPORATION

Inventor： Shouta Io ,  Toshihiro Wakabayashi

IPC: B01D3/14 ,  C07C7/00 ,  C10G25/00 ,  C10G7/00 ,  C10G21/00 ,  B01D3/00

CPC classification number: C07C7/005 ,  B01D3/007 ,  B01D3/14 ,  B01D3/143 ,  B01D3/146 ,  C10G7/00 ,  C10G21/00 ,  C10G25/00 ,  C10G2300/1096 ,  C07C15/08

Abstract: An apparatus includes a first distillation apparatus for obtaining a fraction enriched in C8+ aromatics; a second distillation apparatus for obtaining a fraction enriched in C8 aromatics; an adsorption separation apparatus for obtaining an extract containing para-xylene and a raffinate containing xylene isomers; a third distillation apparatus for obtaining a fraction enriched in para-xylene; and a fourth distillation apparatus for obtaining a fraction enriched in xylene isomers. The second distillation apparatus includes a high-pressure part including a rectifying section; a low-pressure part including a stripping section; a line for directing overhead vapor of the low-pressure part to a column bottom of the high-pressure part; a line for directing a column bottom liquid of the high-pressure part to a column top of the low-pressure part; and a heat exchange structure for transferring heat from the rectifying section to the stripping section.

Abstract translation: 一种装置包括用于获得富含C8 +芳族化合物的级分的第一蒸馏装置; 用于获得富含C8芳族化合物的级分的第二蒸馏装置; 用于获得含有对二甲苯的提取物和含有二甲苯异构体的残液的吸附分离装置; 用于获得富含对二甲苯的馏分的第三蒸馏装置; 以及用于获得富含二甲苯异构体的馏分的第四蒸馏装置。 第二蒸馏装置包括具有整流部的高压部， 包括汽提段的低压部件; 用于将低压部分的塔顶蒸气引导到高压部分的塔底部的管线; 用于将高压部分的塔底液引导到低压部分的塔顶的管线; 以及用于将热量从精馏部分传递到汽提部分的热交换结构。

公开(公告)号：US20160075642A1

公开(公告)日：2016-03-17

申请号：US14950325

申请日：2015-11-24

Applicant: TOYO ENGINEERING CORPORATION

Inventor： Masashi Takahashi ,  Eiki Nagashima

IPC: C07C273/04

CPC classification number: C07C273/04 ,  B01J19/02 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  C22C38/58

Abstract: There is provided a urea synthesis method having excellent reliability and productivity with the amount of oxygen used as a corrosion-resistant agent minimized without using special duplex stainless steel. In a urea synthesis apparatus having a synthesis tower, a stripper, and a condenser, general-purpose austenitic-ferritic duplex stainless steel with Cr content: 21 to 26 wt %, Ni content: 4.5 to 7.5 wt %, Mo content: 2.5 to 3.5 wt %, N content: 0.08 to 0.30 wt %, C content: 0.03 wt % or less, Si content: 1.0 wt % or less, Mn content: 2.0 wt % or less, P content: 0.04 wt % or less, and S content: 0.03 wt % is used as a urea synthesis apparatus material in at least some of parts where the urea synthesis apparatus comes into contact with a fluid having corrosiveness, and oxygen feed concentration with respect to carbon dioxide is 100 to 2,000 ppm.

Abstract translation: 提供了一种具有优异的可靠性和生产率的尿素合成方法，在不使用特殊双相不锈钢的情况下，用作耐腐蚀剂的氧气量最小化。 在具有合成塔，汽提塔和冷凝器的尿素合成装置中，Cr含量为21〜26重量％，Ni含量为4.5〜7.5重量％，Mo含量为2.5〜2.5重量％的通用奥氏体 - 铁素体双相不锈钢 3.5重量％，N含量：0.08〜0.30重量％，C含量：0.03重量％以下，Si含量：1.0重量％以下，Mn含量：2.0重量％以下，P含量：0.04重量％以下， 在尿素合成装置与具有腐蚀性的流体接触的部分的至少一部分中，使用0.03重量％作为尿素合成装置材料，相对于二氧化碳的氧供给浓度为100〜2000ppm。

公开(公告)号：US09278295B2

公开(公告)日：2016-03-08

申请号：US13771741

申请日：2013-02-20

Applicant: TOYO ENGINEERING CORPORATION

Inventor： Toshihiro Wakabayashi ,  Takato Nakao

IPC: B01D3/00 ,  B01D1/28 ,  B01D3/14

CPC classification number: B01D3/007 ,  B01D1/28 ,  B01D3/141 ,  B01D3/143

Abstract: A distillation apparatus includes a rectifying column, a stripping column, a first pipe that communicates a column top of the stripping column with a column bottom of the rectifying column, and a compressor configured to compress vapor from the stripping column and then to feed the compressed vapor to the rectifying column. The distillation apparatus further includes a heat exchanger located at a predetermined stage of the rectifying column, a liquid withdrawal unit located at a predetermined stage of the stripping column and configured to withdraw a part of liquid from the predetermined stage to an outside of the column, a second pipe that introduces the liquid from the liquid withdrawal unit to the heat exchanger, and a third pipe that introduces fluids introduced through the second pipe to the heat exchanger and then discharged out of the heat exchanger to a stage directly below the liquid withdrawal unit.

Abstract translation: 蒸馏装置包括精馏塔，汽提塔，将汽提塔的塔顶与精馏塔的塔底连通的第一管和压缩机，该压缩机被构造成压缩来自汽提塔的蒸汽，然后将压缩的 蒸汽到精馏塔。 所述蒸馏装置还包括位于所述精馏塔的预定阶段的热交换器，位于所述汽提塔的预定阶段的液体取出单元，其构造成将所述预定阶段的一部分液体从所述塔的外部抽出， 第二管，其将液体从液体提取单元引入到热交换器;以及第三管，其将通过第二管引入的流体引入热交换器，然后从热交换器排出到液体提取单元正下方的一级 。

公开(公告)号：US09255011B2

公开(公告)日：2016-02-09

申请号：US13688350

申请日：2012-11-29

Applicant: Masanobu Kawata ,  Hirohumi Tanaka ,  Kohei Mitsuhashi ,  Ryo Kawarabuki ,  Youichi Yamamoto ,  Keita Kamiyama ,  Atsushi Moriya ,  Norifumi Sakai

Inventor： Masanobu Kawata ,  Hirohumi Tanaka ,  Kohei Mitsuhashi ,  Ryo Kawarabuki ,  Youichi Yamamoto ,  Keita Kamiyama ,  Atsushi Moriya ,  Norifumi Sakai

IPC: C01D15/08

CPC classification number: C01D15/08

Abstract: The present invention relates to a method for producing lithium carbonate, which is important as a raw material of a lithium ion battery and the like, from brine resources. More specifically, the invention relates to a method for producing lithium carbonate, in which carbon dioxide gas obtained by calcining limestone is introduced, in the presence of ammonia, into a concentrated brine, which is prepared from a lithium-containing brine as a raw material through an evaporative concentrating step, a desulfurizing step and an electrodialysis step, thereby depositing lithium carbonate crystals, and the crystals thus deposited are recovered through solid-liquid separation.

Abstract translation: 本发明涉及从卤水资源作为锂离子电池等的原料而重要的碳酸锂的制造方法。 更具体地说，本发明涉及一种生产碳酸锂的方法，其中在氨的存在下将煅烧石灰石获得的二氧化碳气体引入浓缩的盐水中，所述浓盐水是以含锂盐水为原料制备的 通过蒸发浓缩步骤，脱硫步骤和电渗析步骤，由此沉积碳酸锂晶体，并且通过固液分离回收这样沉积的晶体。

公开(公告)号：US08663995B2

公开(公告)日：2014-03-04

申请号：US13321529

申请日：2010-05-12

Applicant: Eiji Sakata ,  Kenji Yoshimoto ,  Shuhei Nakamura

Inventor： Eiji Sakata ,  Kenji Yoshimoto ,  Shuhei Nakamura

IPC: F17D3/00 ,  G01N33/18 ,  G01N33/00

CPC classification number: C07C273/04 ,  Y10T137/0318 ,  Y10T436/173845 ,  Y10T436/175383

Abstract: There are provided a method for analyzing an aqueous ammonium carbamate solution whereby the composition of an unreacted-gas absorber outlet liquid can be specified in real time, and a method for operating an unreacted gas absorber by use of the same. The method for analyzing the composition of an aqueous ammonium carbamate solution includes determining ammonia component concentration, carbon dioxide component concentration, and water concentration of the aqueous ammonium carbamate solution, which is the unreacted-gas absorber outlet liquid in a urea production process, by using a correlation among viscosity, temperature, and carbon dioxide component concentration of the aqueous solution and a correlation among density, temperature, ammonia component concentration, and carbon dioxide component concentration of the aqueous solution, wherein the ammonia component concentration is a concentration of a sum of free ammonia and equivalent ammonia of ammonium carbamate which are contained in the aqueous solution, and the carbon dioxide component concentration is a concentration of equivalent carbon dioxide of ammonium carbamate contained in the aqueous solution.

Abstract translation: 提供了一种用于分析氨基甲酸铵水溶液的方法，其中可以实时指定未反应气体吸收剂出口液体的组成，以及使用该方法操作未反应的气体吸收剂。 用于分析氨基甲酸铵水溶液的组成的方法包括在尿素生产过程中测定作为未反应气体吸收剂出口液体的氨基甲酸铵水溶液的氨组分浓度，二氧化碳组分浓度和水浓度，通过使用 水溶液的粘度，温度和二氧化碳组分浓度之间的相关性以及水溶液的密度，温度，氨组分浓度和二氧化碳组分浓度之间的相关性，其中氨组分浓度是 游离氨和氨水溶液中的氨基甲酸铵等量的氨，二氧化碳成分浓度是水溶液中含有的氨基甲酸铵的二氧化碳当量浓度。

公开(公告)号：US08622438B2

公开(公告)日：2014-01-07

申请号：US13280733

申请日：2011-10-25

Applicant: Kensuke Noda

Inventor： Kensuke Noda

IPC: F16L51/02

CPC classification number: F16L51/03 ,  F16L51/035

Abstract: A piping system comprising: a main pipe; a first pipe member connecting an equipment nozzle and the main pipe via a first bellows; a second pipe member connected to a side part of the main pipe; a third pipe member connected to the other end of the second pipe member via a second bellows; first and second tie rod support members fixed to the first and third pipe members; tie rods that interconnect the tie rod support members; and an anchor that sets a portion of the main pipe as a fixed point. Lengths of the pipe members between the tie rod support members are determined so that the first bellows contracts by thermal expansion of the equipment nozzle, the first pipe member, and the pipe member of the main pipe below the anchor, and the second bellows contracts by an amount equally to that of the first bellows.

Abstract translation: 一种管道系统，包括：主管; 通过第一波纹管连接设备喷嘴和主管的第一管构件; 连接到主管的侧部的第二管构件; 通过第二波纹管连接到第二管件的第三管件; 第一和第二拉杆支撑构件固定到第一和第三管构件; 将拉杆支撑构件互连的拉杆; 以及将主管的一部分设定为固定点的锚。 确定拉杆支撑构件之间的管构件的长度被确定为使得第一波纹管通过设备喷嘴，第一管构件和主管下方的管构件的热膨胀而收缩，并且第二波纹管收缩 相当于第一个波纹管的数量。