A system for preparing high-purity taurine and salt. The system can be used in an ethylene oxide process for producing taurine. The system includes an addition reaction device, an ammonolysis reaction device, an evaporation device, and a taurine salt concentrated solution collection device. The ammonolysis reaction device is provided with a metal salt inlet, the taurine salt concentrated solution collection device is connected with an ion exchange system for ion exchange, the ion exchange system is provided with an acid inlet, an adsorption solution outlet and an eluate outlet, the adsorption solution outlet of the ion exchange system is connected with a taurine extraction device, the eluate outlet of the ion exchange system is connected with a salt extraction device, and the ion exchange system is provided with a purified water inlet, an adsorption unit cleaning water outlet and an elution unit cleaning water outlet.

A system for preparing high-purity taurine and salt. The system can be used in an ethylene oxide process for producing taurine. The system includes an addition reaction device, an ammonolysis reaction device, an evaporation device, and a taurine salt concentrated solution collection device. The ammonolysis reaction device is provided with a metal salt inlet, the taurine salt concentrated solution collection device is connected with an ion exchange system for ion exchange, the ion exchange system is provided with an acid inlet, an adsorption solution outlet and an eluate outlet, the adsorption solution outlet of the ion exchange system is connected with a taurine extraction device, the eluate outlet of the ion exchange system is connected with a salt extraction device, and the ion exchange system is provided with a purified water inlet, an adsorption unit cleaning water outlet and an elution unit cleaning water outlet.

A system for preparing high-purity taurine and salt. The system can be used in an ethylene oxide process for producing taurine. The system includes an addition reaction device, an ammonolysis reaction device, an evaporation device, and a taurine salt concentrated solution collection device. The ammonolysis reaction device is provided with a metal salt inlet, the taurine salt concentrated solution collection device is connected with an ion exchange system for ion exchange, the ion exchange system is provided with an acid inlet, an adsorption solution outlet and an eluate outlet, the adsorption solution outlet of the ion exchange system is connected with a taurine extraction device, the eluate outlet of the ion exchange system is connected with a salt extraction device, and the ion exchange system is provided with a purified water inlet, an adsorption unit cleaning water outlet and an elution unit cleaning water outlet.

To provide a method for producing a fluorinated ether compound having a poly(oxyfluoroalkylene) chain and a sulfonate group with low impurity content and in high yield.

A method for producing a fluorinated ether compound, comprising step 1 of sulfonylating a fluorinated ether compound having a poly(oxyfluoroalkylene) chain and a hydroxy group in the presence of a fluorinated solvent, a base and a sulfonylating agent to obtain a product containing a fluorinated ether compound having a poly(oxyfluoroalkylene) chain and a sulfonate group, and step 2 of contacting the product obtained in step 1 with an adsorbent having a pH of at most 8.0.

Disclosed are a variety of amphoteric compounds containing a quaternary nitrogen group, a covalently bound counterion, and an ester or amide group. These amphoteric compounds can be advantageously prepared via a chemoenzymatic green process, and exhibit good surfactant properties.

Disclosed are a variety of amphoteric compounds containing a quaternary nitrogen group, a covalently bound counterion, and an ester or amide group. These amphoteric compounds can be advantageously prepared via a chemoenzymatic green process, and exhibit good surfactant properties.

Disclosed are a variety of amphoteric compounds containing a quaternary nitrogen group, a covalently bound counterion, and an ester or amide group. These amphoteric compounds can be advantageously prepared via a chemoenzymatic green process, and exhibit good surfactant properties.

The invention relates to a use of a fluorination gas, wherein the elemental fluorine (F.sub.2) is present in a high concentration, for example, in a concentration of elemental fluorine (F.sub.2), especially of equal to much higher than 15% or even 20% by volume (i.e., at least 15% or even 20% by volume), and to a process for the manufacture of a fluorinated benzene by direct fluorination employing a fluorination gas, wherein the elemental fluorine (F.sub.2) is present in a high concentration. The process of the invention is directed to the manufacture of a fluorinated benzene by direct fluorination. Especially the invention is of interest in the preparation of fluorinated benzene, final products and as well intermediates, for usage in agro-, pharma-, electronics-, catalyst, solvent and other functional chemical applications. The fluorination process of the invention may be performed batch-wise or in a continuous manner. If the process of the invention is performed batch-wise, a column (tower) reactor may be used. If the process of the invention is continuous a microreactor may be used. The invention is characterized in that the starting compound is benzene, and the fluorinated compound produced is a fluorinated benzene, preferably monofluorobenzene.

The invention relates to a use of a fluorination gas, wherein the elemental fluorine (F.sub.2) is present in a high concentration, for example, in a concentration of elemental fluorine (F.sub.2), especially of equal to much higher than 15% or even 20% by volume (i.e., at least 15% or even 20% by volume), and to a process for the manufacture of a fluorinated benzene by direct fluorination employing a fluorination gas, wherein the elemental fluorine (F.sub.2) is present in a high concentration. The process of the invention is directed to the manufacture of a fluorinated benzene by direct fluorination. Especially the invention is of interest in the preparation of fluorinated benzene, final products and as well intermediates, for usage in agro-, pharma-, electronics-, catalyst, solvent and other functional chemical applications. The fluorination process of the invention may be performed batch-wise or in a continuous manner. If the process of the invention is performed batch-wise, a column (tower) reactor may be used. If the process of the invention is continuous a microreactor may be used. The invention is characterized in that the starting compound is benzene, and the fluorinated compound produced is a fluorinated benzene, preferably monofluorobenzene.

This invention relates to an anionic-cationic-nonionic surfactant as substantially represented by the formula (I), production and use thereof in tertiary oil recovery. The anionic-cationic-nonionic surfactant of this invention exhibits significantly improved interfacial activity and stability as compared with the prior art. With the present anionic-cationic-nonionic surfactant, a flooding fluid composition for tertiary oil recovery with improved oil displacement efficiency and oil washing capability as compared with the prior art could be produced.

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In the formula (I), each group is as defined in the specification.