A compound of formula (I) ##STR00001##
wherein R.sup.1 is hydrogen or an organic radical of 1 to 100 carbon atoms, R.sup.2, R.sup.3 are independently hydrogen or an organic radical of 1 to 100 carbons, Z is a single bond or a divalent organic group of 1 to 100 carbons, A is an (n+m)-valent organic group of 1 to 1 000 000 carbons, X is a single bond or a divalent organic group of 1 to 40 carbons, n is an integer from 1 to 1000, m is 0, 1, or 2, the sum of n+m being an integer from 2 to 1002. Such compounds are obtainable from specific 4-oxy-but-2-yn-1-ol derivatives, or used as intermediate(s), crosslinker(s), or monomer(s) in polymerization or oligomerization reactions, or for two-component compositions having such compound(s) and multifunctional hardener(s). Such compound(s) may be used to prepare polyunsaturated compounds, by reaction with an (oligo/poly)-functional nucleophile, or polymers.

An electrolyte solution containing a solvent. The solvent contains a compound (1) represented by the following formula (1), wherein R.sup.a, R.sup.b, R.sup.c, and R.sup.d are the same as or different from each other, and are each —H, —F, —CH.sub.3, or —CF.sub.3; at least one of R.sup.a, R.sup.b, R.sup.c, or R.sup.d is —F or —CF.sub.3; and at least one of R.sup.a, R.sup.b, R.sup.c, or R.sup.d is —CH.sub.3, and a compound (2) represented by the following formula (2), wherein R.sup.e is a C1-C5 linear or branched alkyl or alkoxy group optionally containing an ether bond; R.sup.f is a C1-C5 linear or branched alkyl group optionally containing an ether bond; and at least one of R.sup.e or R.sup.f contains a fluorine atom. Also disclosed is an electrochemical device including the electrolyte solution, a lithium-ion secondary battery including the electrolyte solution and a module including the electrochemical device. ##STR00001##

An electrolyte solution containing a solvent. The solvent contains a compound (1) represented by the following formula (1), wherein R.sup.a, R.sup.b, R.sup.c, and R.sup.d are the same as or different from each other, and are each —H, —F, —CH.sub.3, or —CF.sub.3; at least one of R.sup.a, R.sup.b, R.sup.c, or R.sup.d is —F or —CF.sub.3; and at least one of R.sup.a, R.sup.b, R.sup.c, or R.sup.d is —CH.sub.3, and a compound (2) represented by the following formula (2), wherein R.sup.e is a C1-C5 linear or branched alkyl or alkoxy group optionally containing an ether bond; R.sup.f is a C1-C5 linear or branched alkyl group optionally containing an ether bond; and at least one of R.sup.e or R.sup.f contains a fluorine atom. Also disclosed is an electrochemical device including the electrolyte solution, a lithium-ion secondary battery including the electrolyte solution and a module including the electrochemical device. ##STR00001##

An electrolyte solution containing a compound represented by the following formula (1): ##STR00001##
wherein R.sup.101 and R.sup.102 are the same as or different from each other and are each a hydrogen atom, a fluorine atom, or an alkyl group optionally containing a fluorine atom; and R.sup.103 is an alkyl group or an organic group containing an unsaturated carbon-carbon bond. Also disclosed is an electrochemical device and lithium ion secondary battery including the electrolyte solution, and a module including the electrochemical device or lithium ion secondary battery.

An electrolyte solution containing a compound represented by the following formula (1): ##STR00001##
wherein R.sup.101 and R.sup.102 are the same as or different from each other and are each a hydrogen atom, a fluorine atom, or an alkyl group optionally containing a fluorine atom; and R.sup.103 is an alkyl group or an organic group containing an unsaturated carbon-carbon bond. Also disclosed is an electrochemical device and lithium ion secondary battery including the electrolyte solution, and a module including the electrochemical device or lithium ion secondary battery.

The invention relates to a process for producing ethylene glycol and/or ethylene carbonate, said process comprising contacting at least a portion of a recycle gas stream comprising an alkyl iodide impurity with a guard bed system positioned upstream of an ethylene oxide reactor to produce a treated recycle gas stream, wherein the guard bed system comprises silver on alumina; contacting a feed gas stream comprising ethylene, oxygen and at least a portion of the treated recycle gas stream with an epoxidation catalyst in the ethylene oxide reactor to produce an epoxidation reaction product comprising ethylene oxide; and contacting at least a portion of the epoxidation reaction product comprising ethylene oxide with an aqueous absorbent in the presence of an iodide-containing catalyst in an absorber to produce an aqueous product stream comprising ethylene carbonate and/or ethylene glycol and the recycle gas stream comprising the alkyl iodide impurity.

The invention relates to a process for producing ethylene glycol and/or ethylene carbonate, said process comprising contacting at least a portion of a recycle gas stream comprising an alkyl iodide impurity with a guard bed system positioned upstream of an ethylene oxide reactor to produce a treated recycle gas stream, wherein the guard bed system comprises silver on alumina; contacting a feed gas stream comprising ethylene, oxygen and at least a portion of the treated recycle gas stream with an epoxidation catalyst in the ethylene oxide reactor to produce an epoxidation reaction product comprising ethylene oxide; and contacting at least a portion of the epoxidation reaction product comprising ethylene oxide with an aqueous absorbent in the presence of an iodide-containing catalyst in an absorber to produce an aqueous product stream comprising ethylene carbonate and/or ethylene glycol and the recycle gas stream comprising the alkyl iodide impurity.

A method for producing a heterogeneous catalyst for use of synthesizing cyclic carbonates by reacting an epoxide and carbon dioxide in the presence of the catalyst. A method for making a catalyst that includes forming a catalyst precursor then reacting the catalyst precursor with a tertiary phosphine.

A method for producing a heterogeneous catalyst for use of synthesizing cyclic carbonates by reacting an epoxide and carbon dioxide in the presence of the catalyst. A method for making a catalyst that includes forming a catalyst precursor then reacting the catalyst precursor with a tertiary phosphine.

The present invention relates to the technical field of chemical industry, and in particular to a method for purifying ethylene carbonate through dynamic crystallization, which includes the following steps: adding an ethylene carbonate-containing raw material into a cavity of a crystallization device under a condition of stirring for dynamic crystallization, wherein the crystallization device further includes a jacket attached and circumferentially disposed along the outer wall of the cavity, the jacket is provided with cooling water therein, a temperature of the cooling water is 1-2.5° C. lower than the temperature in the cavity until a granular ethylene carbonate crystal is generated. The present invention using a rake dryer as the crystallization device to realize dynamic crystallization at a certain rotating speed. The technical solution is simple to operate and short in processing cycle, which facilitates improvement in production efficiency and product quality and is suitable for industrial application.