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4-Traders Homepage  >  Equities  >  Tokyo  >  Ube Industries, Ltd.    4208   JP3158800007

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Ube Industries : Patent Issued for Method for Producing Nitrous Acid Ester, and Method for Producing Dialkyl Oxalate and Dialkyl Carbonate (USPTO 9499473)

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12/01/2016 | 12:51pm EST

By a News Reporter-Staff News Editor at Life Science Weekly -- UBE Industries, Ltd. (Yamaguchi, JP) has been issued patent number 9499473, according to news reporting originating out of Alexandria, Virginia, by NewsRx editors (see also UBE Industries, Ltd.).

The patent's inventors are Tanaka, Syuji (Ube, JP); Il, Hirofumi (Ube, JP); Hino, Akira (Ube, JP); Fukui, Yuya (Ube, JP); Ueda, Satoshi (Ube, JP).

This patent was filed on February 27, 2013 and was published online on November 22, 2016.

From the background information supplied by the inventors, news correspondents obtained the following quote: "As a method for producing nitrous acid ester in which nitric oxide, oxygen, and an alcohol are reacted, a method is known in which an alcohol is supplied to the upper part of a reaction column, is made to flow downward from the upper part to the lower part of the reaction column, nitric oxide and oxygen, or a gas mixture thereof is supplied to the lower part of the reaction column, nitric oxide, oxygen, and the alcohol are reacted so as to generate nitrous acid ester, and nitrous acid ester is extracted from the top part of the reaction column (refer to Patent Literature 1 and 2).

"In addition, another method is known in which a bottom liquid is extracted from the bottom part of a reaction column, and the bottom liquid is supplied to a reactor for nitric acid conversion, and is brought into contact with carbon monoxide and nitric oxide in the reactor for nitric acid conversion, thereby generating nitrous acid ester (refer to Patent Literatures 3 and 4)."

Supplementing the background information on this patent, NewsRx reporters also obtained the inventors' summary information for this patent: "Technical Problem

"However, even when the method for converting nitric acid into nitrous acid ester using nitric oxide or carbon monoxide is used, a liquid waste discharged from the reactor for nitric acid conversion contains a significant amount of nitric acid. According to the present inventors' studies, it was not possible to reduce the concentration of nitric acid in the liquid waste to below a range of 1 to 2% by weight.

"The invention has been made in consideration of the above-described circumstances, and an object of the invention is to provide a method for producing nitrous acid ester capable of decreasing the loss of a nitrogen component that is a raw material by further reducing the concentration of nitric acid in the liquid waste. In addition, another object of the invention is to provide a method for producing a dialkyl oxalate and a dialkyl carbonate capable of reducing the loss of the nitrogen component that is used as a raw material by applying the above-described method for producing nitrous acid ester.

"Solution to Problem

"As a result of intensive studies, the inventors found that, when the concentration of nitric acid in the reactor for nitric acid conversion is increased by condensing a reaction liquid of the reactor for nitric acid conversion using a nitric acid condensing column, and returning the condensed reaction liquid to the reactor for nitric acid conversion, the above-described problem can be solved.

"That is, the invention has, specifically, the following configuration. The invention is a method for producing nitrous acid ester in which an alcohol is supplied to an upper part of a reaction column for producing nitrous acid ester (hereinafter, also referred to as 'reaction column'), is made to flow downward from the upper part to a lower part of the reaction column, nitric oxide and oxygen, or a gas mixture thereof is supplied to the lower part of the reaction column, nitric oxide, oxygen, and the alcohol are reacted, thereby generating nitrous acid ester, the method including:

"a step of extracting a bottom liquid containing water, nitric acid, and an alcohol from the bottom part of the reaction column so as to supply the bottom liquid to a reactor for nitric acid conversion (hereinafter, also referred to as 'reactor'), supplying nitric oxide and/or carbon monoxide to the reactor, and generating nitrous acid ester by brining nitric oxide and/or carbon monoxide into contact with the bottom liquid in the reactor;

"a step of supplying nitrous acid ester obtained in the reactor to the reaction column;

"a step of supplying a reaction liquid containing water, nitric acid, and the alcohol to a nitric acid condensing column, and separating a low-boiling point component by distillation under control of a concentration of the alcohol in a condensed liquid being generated at a bottom part of the nitric acid condensing column to be less than 4.0% by weight; and

"a step of extracting the condensed liquid from the lower part of the nitric acid condensing column so as to introduce the condensed liquid into the reactor.

"In the invention, it is preferable that the nitrous acid ester obtained in the reactor be supplied to an arbitrary height below a middle part of the reaction column. In addition, in the invention, it is preferable that the bottom liquid of the reaction column extracted from the bottom part of the reaction column be guided to and cooled in a cooler, and the cooled bottom liquid of the reaction column be circulated to the middle part of the reaction column.

"In the invention, it is preferable that an inside of the nitric acid condensing column be depressurized to lower than an atmospheric pressure. The reaction liquid is preferably supplied to an upper part of the nitric acid condensing column. In addition, in the invention, it is preferable that an alcohol in the low-boiling point component separated by distillation in the nitric acid condensing column be purified and supplied to the upper part of the reaction column for producing nitrous acid ester.

"In the invention, it is preferable that a bottom temperature of the nitric acid condensing column be 90.degree. C. or lower. It is preferable that gas supplied to the reactor be carbon monoxide, and the carbon monoxide and the reaction liquid be brought into contact with each other in the reactor in the presence of a platinum group catalyst.

"The invention provides a method for producing a dialkyl oxalate in which nitrous acid ester produced using the above-described method for producing nitrous acid ester and carbon monoxide are reacted in the presence of a catalyst, thereby producing a dialkyl oxalate. In addition, the invention provides a method for producing a dialkyl carbonate in which nitrous acid ester produced using the above-described method for producing nitrous acid ester and carbon monoxide are reacted in the presence of a catalyst, thereby producing a dialkyl carbonate.

"Advantageous Effects of Invention

"According to the invention, it is possible to sufficiently reduce the concentration of nitric acid in a liquid waste by effectively reusing a nitric acid compound being generated as a byproduct. Then, it is possible to reduce the loss of a nitrogen component that is used as a raw material."

For the URL and additional information on this patent, see: Tanaka, Syuji; Il, Hirofumi; Hino, Akira; Fukui, Yuya; Ueda, Satoshi. Method for Producing Nitrous Acid Ester, and Method for Producing Dialkyl Oxalate and Dialkyl Carbonate. U.S. Patent Number 9499473, filed February 27, 2013, and published online on November 22, 2016. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9499473.PN.&OS=PN/9499473RS=PN/9499473

Keywords for this news article include: Anions, Alkalies, Chemicals, Chemistry, Carbonates, Chalcogens, Nitric Acid, Nitric Oxide, Nitrous Acid, Carbonic Acid, Carbon Monoxide, Nitrogen Oxides, Nitrogen Compounds, UBE Industries Ltd, Noncarboxylic Acids, Reactive Nitrogen Species, Inorganic Carbon Compounds.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2016, NewsRx LLC

(c) 2016 NewsRx LLC, source Health Newsletters

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Financials ( JPY)
Sales 2017 624 244 M
EBIT 2017 -
Net income 2017 19 467 M
Debt 2017 147 237 M
Yield 2017 2,35%
P/E ratio 2017 13,79
P/E ratio 2018 11,70
EV / Sales 2017 0,67x
EV / Sales 2018 0,64x
Capitalization 270 810 M
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Number of Analysts 10
Average target price 234  JPY
Spread / Average Target -8,2%
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Yuzuru Yamamoto President, Group CEO & Representative Director
Michio Takeshita Chairman
Masayuki Fujii Group CFO & Manager-Business Administration
Morihisa Yokota Executive Officer, GM-Research & Development
Hideyuki Sugishita Representative Director & President-Chemicals
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