Central Glass Company, Limited

Other

Nippon Zeon Company, Ltd.

Hideaki Imura

Naoto Takada

Masamune Okamoto

Fuyuhiko Sakyu

Satoru Okamoto

Takeo Komata

Masatomi Kanai

Yoshio Nishiguchi

Kei Matsunaga

Masahiko Tani

Tatsuya Hayasaka

Shota Kawano

Koji Ueda

Satoshi Yoshikawa

Mineo Watanabe

Takayuki Nishimiya

Kenji Hosoi

Kohei Sumida

Kensuke Hirotaki

Mikio Ujiie

Naoki Nishinaka

Naoya Ueshima

Minako Oomura

According to an embodiment, a method for producing a (hydro)halocarbon includes a step of purifying the (hydro)halocarbon by reduced-pressure distillation of an azeotropic or azeotropic-like composition containing the (hydro)halocarbon and a compound different from the (hydro)halocarbon. According to another embodiment, a method for producing a (hydro)halocarbon includes a step purifying the (hydro)halocarbon by reduced-pressure distillation of an azeotropic or azeotropic-like composition containing the (hydro)halocarbon and a compound different from the (hydro)halocarbon, wherein standard boiling points of both the (hydro)halocarbon and the compound are 80° C. or lower.

Method for purifying (hydro)halocarbon by reduced pressure distillation from azeotropic or azeotropic-like composition

By fluorinating 1,2,3,3-tetrachloro-1-propene (1230xd) using hydrogen fluoride as a fluorinating agent, an efficient method for producing 1,2-dichloro-3,3-difluoro-1-propene (1232xd) is provided. Through this composition including 1232xd, there are also provided an environmentally friendly composition having excellent ability to dissolve various organic matters, a method for cleaning an article using the composition, a method for producing a lubricant solution using the composition, and a method for producing a component provided with a lubricant coating film.

Method for producing 1,2-dichloro-3,3-difluoro-1-propene and solvent composition

A storage method of HCFO-1233zd (Z) according to an embodiment of the present invention, includes using a storage container having a liquid-contact portion thereof. The liquid-contact portion is formed of a material selected from the group consisting of epoxy-phenolic resin, phenolic resin, phenolic-butyral resin, stainless steel, iron phosphate, zinc phosphate and glass.

Storage container and storage method of Z-1-chloro-3,3,3-trifluoropropene

Fluoral is obtained by gas-phase fluorination of chloral in the presence of a catalyst and then reacted with trimethyl orthoformate, thereby readily forming 1,2,2,2-tetrafluoroethyl methyl ether as an intermediate for production of desflurane. 1,2,2,2-Tetrafluoroethyl difluoromethyl ether (desflurane) is produced with high yield from the thus-formed 1,2,2,2-tetrafluoroethyl methyl ether by chlorination and fluorination. This method enables efficient industrial-scale production of desflurane useful as an inhalation anesthetic.

Production method for 1,2,2,2-tetrafluoroethyl difluoromethyl ether (desflurane)

A method for producing 1,2-dichloro-3,3,3-trifluoropropene according to the present invention includes the step of reacting 1,1,2,3,3-pentachloropropene with a fluorinating agent where hydrogen fluoride is used as the fluorinating agent.

Method for producing 1,2-dichloro-3,3,3-Trifluoropropene

A liquid composition according to one embodiment of the present invention contains 0.0001 mol % to 40 mol % (Z)-1,2-dichloro-3,3,3-trifluoropropene (1223Z) and 99.9999 mol % to 60 mol % (E)-1,2-dichloro-ethylene (t-DCE). The liquid composition has less influence on the global environment and azeotropic (or azeotrope-like) properties. There occurs practically no composition change even when the liquid composition is used in an open system or used for a long term. Further, it is less likely that there will occur a composition change even when the liquid composition is recovered by distillation. The liquid composition is thus suitably usable as a cleaning agent (solvent). In particular, the liquid composition of 90 mol % or less of t-DCE is classified as non-hazardous under the Fire Serves Act.

Azeotropic composition having fluorine-containing olefin as constituent

What is disclosed is a liquid composition containing: 80 mol % to 99.9999 mol % of (Z)-1,2-dichloro-3,3,3-trifluoropropene (1223Z) and 0.0001 mol % to 20 mol % of (E)-1,2-dichloro-3,3,3-trifluoropropene (1223E). The liquid composition has small impact on the global environment and exerts azeotrope-like properties. Therefore, the composition of the liquid composition is not substantially changed even when the liquid composition is used in an open system or used for a long period. The composition of the liquid composition is also rarely changed even when the liquid composition is recovered by distillation. Therefore, the liquid mixture according to the present invention can be used suitably as a cleaning agent (a solvent).

Azeotrope-like composition containing fluorinated olefin as component

An azeotropic-like composition containing 2-chloro-1,3,3,3-tetrafluoropropene and 1-chloro-3,3,3-trifluoropropene is provided. The azeotropic-like composition according to the present invention is non-flammable, has little influence on the environment, and has substantially the same composition ratio in the liquid phase and the gas phase. By use of an azeotropic-like composition according to the present invention, a washing detergent, a solvent, a silicone solvent, a foaming agent, a coolant, a heating medium for a heat pump, and a high temperature working fluid that are non-flammable, have little influence on the environment, and have substantially the same composition ratio in a liquid phase and a gas phase thereof may be provided.

Azeotropic like composition containing 2-chloro-1,3,3,3-tetrafluoropropene and 1-chloro-3,3,3-trifluoropropene

A production method of 2-chloro-1,3,3,3-tetrafluoropropene (1224) according to the present invention includes bringing 2,3-dichloro-1,1,1,3-tetrafluoropropane (234da) into contact with an inorganic base having a pKa of 4.8 or greater in an aqueous medium in the presence of a phase transfer catalyst. Preferably, the inorganic base has a pKa of 10 or greater. Further, the phase transfer catalyst is preferably at least one selected from the group consisting of tetrabutylammonium bromide, methyltri-n-octylammonium chloride, benzyltrimethylammonium chloride and tetraethylammonium chloride. It is possible by this method to selectively produce 1224 from 234da.

Method for producing 2-chloro-1,3,3,3-tetrafluoropropene

Provided is a purification method for efficiently reducing an undesirable organic compound or compound in (E)-1-chloro-3,3,3-trifluoropropene and thereby obtaining (E)-1-chloro-3,3,3-trifluoropropene with high purity. The purification method of OF-1233E according to the present invention is characterized by bringing a composition containing OF-1233E and at least one organic compound selected from the group consisting of HCFC-142 isomers, HCFC-244fa, HFC-245fa, OF-1234E, OF-1234Z and OF-1233Z into contact with a solid adsorbent.

Method for purifying (E)-1-chloro-3,3,3-trifluoropropene

A method for producing a desired isomer of 1-chloro-3,3,3-trifluoro-1-propene or a desired isomer of 1,3,3,3-tetrafluoropropene at a high conversion ratio with no use of a solid catalyst is provided. Since no solid catalyst is used, a desired isomer of 1-chloro-3,3,3-trifluoro-1-propene and a desired isomer of 1,3,3,3-tetrafluoropropene can be stably obtained with no undesired possibility that the solid catalyst is deteriorated due to coking or the like caused as a result of long-time use thereof.

Method for producing 1-chloro-3,3,3-trifluoro-1-propene and 1,3,3,3-tetrafluoropropene

The present invention provides a process for purifying a (E)-1-chloro-3,3,3-trifluoropropene composition (OF-1233E composition) in which at hydrogen fluoride and 2-chloro-1,1,1,3,3-pentafluoropropane are contained by bringing the (E)-1-chloro-3,3,3-trifluoropropene composition into contact with a weak base and a method for producing (E)-1-chloro-3,3,3-trifluoropropene composition by distilling the (E)-1-chloro-3,3,3-trifluoropropene composition obtained by such a purification process. This makes it possible to efficiently produce OF-1233E by removing the hydrogen fluoride from the OF-1233E composition, without generating any new component difficult to separate by distillation, and subjecting the resulting composition to distillation.

Method for producing (E)-1-chloro-3,3,3-trifluoropropene

Disclosed is a method for purifying a trans-1,3,3,3-tetrafluoropropene, in which a composition containing trans-1,3,3,3-tetrafluoropropene and at least one impurity selected from the group consisting of CHClF, CFCHCHClF, CFCHCHF, CHFCH&#x2550;CF, CFCH&#x2550;CHCl, CFCH&#x2550;CH, CFC&#x2261;CH, and cis-1,3,3,3-tetrafluoropropene is brought into contact with a solid adsorbent to reduce an impurity content thereof. By this method, it is possible to remove the impurity in trans-1,3,3,3-tetrafluoropropene by a simple operation.

Method for purifying trans-1,3,3,3-tetrafluoropropene

Disclosed is a process for producing 2-chloro-1,3,3,3-tetrafluoropropene (1224), including a first step of separating 2,3-dichloro-1,1,1,3-tetrafluoropropane (234da) into erythro form and threo form, and a second step of bringing the separated erythro form or threo form in contact with a base to obtain 2-chloro-1,3,3,3-tetrafluoropropene (1224). The first step is a step of separating 234da by distillation to achieve a separation into a fraction containing mainly erythro form and a fraction containing mainly threo form. In the second step, 1224 cis form is obtained from the erythro form, and 1224 trans form is obtained from the threo form. By this process, it is possible to selectively and efficiently produce cis form or trans form of 2-chloro-1,3,3,3-tetrafluoropropene (1224).

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Saitama, Japan

Hideaki Imura