Mobara, Japan

Toyo Engineering Corporation is an engineering, procurement and construction company serving mainly the hydrocarbons and petrochemical sectors worldwide.It was established in 1961. Its various business include R&D collaboration, design, engineering, equipment procurement, construction, test operations and technical guidance in such areas as general chemicals, petrochemicals, oil refinement, natural gas, electric power, nuclear power, advanced production systems, distribution, medical facilities, biotechnology, environment at each manufacturing plant, procurement, development and sales of systems engineering and other software.Most of its revenue comes from outside Japan; it has a particular presence in China, India, Indonesia, Iran and Russia. In the fiscal year ending March 31, 2008, it had sales of 215 billion yen, a net income of 4.45 billion yen, and about a thousand employees; thanks to the late-2000s boom in the energy industry, it has more than two years backlog of orders.The Toyo Group, or Global Toyo, consists of Toyo together with 27 subsidiaries and 11 affiliates, with a total of 5500 employees; the central portion comprises about 3300 employees. Wikipedia.


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Patent
Toyo Engineering Corporation | Date: 2014-01-28

In a chemical plant 100 including a carbon dioxide recovery unit 10 and a urea plant 11, the carbon dioxide recovery unit 10 treats combustion exhaust gas from a boiler B to separate and recover carbon dioxide. Low-pressure steam 33 generated in the urea plant 11 is supplied to the carbon dioxide recovery unit 10 as a heat source for its regeneration tower reboiler. Carbon dioxide 22 recovered in the carbon dioxide recovery unit 10 is sent to an EOR facility, a storage facility, and the like outside the plant. Thus, the low-pressure steam generated in the urea plant 11 is effectively used as a heat source for the carbon dioxide recovery unit 10.


Patent
Toyo Engineering Corporation | Date: 2015-11-24

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.


Patent
Toyo Engineering Corporation | Date: 2014-05-21

In a heat integrated distillation column (HIDiC), the product purity can be stably maintained against various disturbances. Provided is a method for controlling a distillation apparatus, which includes a high-pressure part (1) including the whole or a part of a rectifying section and performing gas-liquid contact at a relatively high pressure; a low-pressure part (2) including the whole or a part of a stripping section and performing gas-liquid contact at a relatively low pressure; a line (23) for directing overhead vapor of the low-pressure part (2) to a column bottom of the high-pressure part (1); a line (40) for directing a column bottom liquid of the high-pressure part (1) to a column top of the low-pressure part (2); and a heat exchange structure for transferring heat from the rectifying section to the stripping section, wherein the method includes controlling a flow rate of the column bottom liquid to be directed from the high-pressure part (1) to the low-pressure part (2). Also provided is the distillation apparatus including a flow rate control means (101) in the line for directing the bottom liquid of the high-pressure part (1) to the low-pressure part (2).


Patent
Toyo Engineering Corporation | Date: 2014-11-14

An oily water separator for removing oil from oil-containing water, including a vessel, a filtration membrane unit and a discharge mechanism;


The present invention provides a method for operating a stripper that is provided for a separating process in an aromatic component processing apparatus in which the stripper separates a component that is lighter than an aromatic component from the aromatic component via a distillation operation. In the method, using a HIDiC as the stripper, the pressure of the column top of rectifying section (201) of the HIDiC is determined, and the pressure of the column top of stripping section (202) of the HIDiC is set to be lower than the pressure of the column top of rectifying section (201).


Patent
Toyo Engineering Corporation | Date: 2015-01-09

Significant energy saving can be achieved for a distillation column even when the distillation column has a large column temperature difference. Provided is a distillation column including a first and second columns, wherein the first column includes a part of a rectifying section or a part of a stripping section; the second column includes, if the first column includes a part of the rectifying section, the rest of the rectifying section and the whole of the stripping section, or the second column includes, if the first column includes a part of the stripping section, the rest of the stripping section and the whole of the rectifying section; and the second column constitutes a mechanical-heat-pump distillation column.


Patent
Toyo Engineering Corporation | Date: 2015-07-22

Significant energy saving can be achieved for a distillation column even when the distillation column has a large column temperature difference. Provided is a distillation column including a first (A1) and second columns (A2), wherein the first column (A1) includes a part of a rectifying section or a part of a stripping section; the second column includes, if the first column includes a part of the rectifying section, the rest of the rectifying section (A3) and the whole of the stripping section (A4), or the second column includes, if the first column includes a part ofthe stripping section, the rest ofthe stripping section and the whole ofthe rectifying section; and the second column constitutes a mechanical-heat-pump distillation column (A6, A8).


Patent
Toyo Engineering Corporation | Date: 2014-05-21

Energy consumption in the production of an aromatic hydrocarbon is reduced. Provided is an aromatic hydrocarbon production apparatus which includes a first distillation apparatus for obtaining a fraction enriched in C8+ aromatics and a fraction enriched in lighter components; a second distillation apparatus for obtaining, from the fraction enriched in C8+ aromatics, a fraction enriched in C8 aromatics and a fraction enriched in C9+ aromatics; an adsorption separation apparatus for obtaining, from the fraction enriched in C8 aromatics, an extract containing para-xylene and a raffinate containing xylene isomers; a third distillation apparatus for obtaining, from the extract, a fraction enriched in para-xylene and a fraction enriched in a desorbent; and a fourth distillation apparatus for obtaining, from the raffinate, a fraction enriched in xylene isomers and a fraction enriched in the desorbent. The second distillation apparatus includes a high-pressure part including a rectifying section and performing gas-liquid contact at a higher pressure; a low-pressure part including a stripping section and performing gas-liquid contact at a lower pressure; 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.


Patent
Toyo Engineering Corporation | Date: 2014-11-20

A distillation apparatus includes a first distillation column and one or more second distillation columns. A higher-pressure part of the first distillation column includes at least part of a rectifying section, and performs gas-liquid contact at a relatively high pressure. A lower pressure-part of the first distillation column includes at least part of a stripping section and performs gas-liquid contact at a relatively low pressure. A vapor line, which includes a pressurizing means, directs a vapor discharged from a column top of the lower-pressure part to a column bottom of the higher-pressure part. A liquid line directs a liquid discharged from the column bottom of the higher-pressure part to the column top of the lower pressure part. Corresponding heat exchange structures transfer heat in both directions between the rectifying section of the first distillation column and at least one second distillation column.


Patent
Toyo Engineering Corporation | Date: 2015-05-27

In a distillation apparatus including a plurality of distillation columns, total energy consumption is reduced while controlling a cost increase. Provided is a distillation apparatus including a first distillation column and one or more second distillation columns, wherein the first distillation column includes: a higher-pressure part including the whole or a part of a rectifying section and configured to perform gas-liquid contact at a relatively high pressure; a lower-pressure part including the whole or a part of a stripping section and configured to perform gas-liquid contact at a relatively low pressure; a vapor line, including a pressurizing means, for directing a vapor discharged from a column top of the lower-pressure part to a column bottom of the higher-pressure part; and a liquid line for directing a liquid discharged from the column bottom of the higher-pressure part to the column top of the lower-pressure part, and the distillation apparatus includes: a first heat exchange structure configured to transfer heat from the rectifying section of the first distillation column to at least one of the one or more second distillation columns by heat exchange; and a second heat exchange structure configured to transfer heat from at least one of the one or more second distillation columns to the stripping section of the first distillation column by heat exchange.

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