Disclosed are a composite absorbent and a method for using same in the absorption and conversion of ethylene oxide for the coupling co-production of ethylene carbonate. The composite absorbent comprises an ionic liquid and ethylene carbonate, wherein the ionic liquid is an imidazole ionic liquid, a quaternary ammonium ionic liquid and a quaternary phosphonium ionic liquid. The composite absorbent is used for absorbing ethylene oxide and carbon dioxide, and is also used in the absorption and conversion of ethylene oxide for the coupling co-production of ethylene carbonate.

Disclosed are a composite absorbent and a method for using same in the absorption and conversion of ethylene oxide for the coupling co-production of ethylene carbonate. The composite absorbent comprises an ionic liquid and ethylene carbonate, wherein the ionic liquid is an imidazole ionic liquid, a quaternary ammonium ionic liquid and a quaternary phosphonium ionic liquid. The composite absorbent is used for absorbing ethylene oxide and carbon dioxide, and is also used in the absorption and conversion of ethylene oxide for the coupling co-production of ethylene carbonate.

The present invention relates to method and an apparatus for quantitatively analyzing a gaseous process stream, in particular a stream from a process for producing ethylene carbonate and/or ethylene glycol, in particular where such stream comprises gaseous organic iodides.

The present invention relates to method and an apparatus for quantitatively analyzing a gaseous process stream, in particular a stream from a process for producing ethylene carbonate and/or ethylene glycol, in particular where such stream comprises gaseous organic iodides.

A system and a process for co-producing dimethyl carbonate and ethylene glycol. The system comprises an interconnected ethylene carbonate preparation unit and an ethylene carbonate alcoholysis unit. The ethylene carbonate preparation unit comprises a fixed bed reactor and a light-component stripping column connected to each other. The fixed bed reactor is filled with a supported ionic liquid catalyst. The process comprises the steps of: reacting carbon dioxide and ethylene oxide as raw materials in the fixed bed reactor to produce ethylene carbonate, purifying the ethylene carbonate and then mixing it with an alcoholysis reaction catalyst, and reacting the mixture with methanol in a reactive distillation tower, producing dimethyl carbonate and ethylene glycol. The process increases the conversion rate of ethylene oxide and avoids the need for a process of separating conventional homogeneous catalysts from ethylene carbonate, thereby reducing process energy consumption and simplifying process procedures.

A radiation-sensitive resin composition includes a resin including a structural unit having an acid-dissociable group, an onium salt compound represented by formula (1), and a solvent. R.sup.1 is a hydrogen atom or a monovalent group provided that the monovalent group is not a fluoro group or a monovalent organic group containing a fluorine atom. X.sup.1 and X.sup.2 are each independently a single bond, —O—, —S— or —NR′— wherein R′ is a hydrogen atom or a monovalent hydrocarbon group. In a case where X.sup.1 is —NR′—, R.sup.2 is a monovalent organic group or a hydrogen atom. In a case where X.sup.2 is —NR′—, R.sup.3 is a monovalent organic group or a hydrogen atom. In a case where neither X.sup.1 nor X.sup.2 is —NR′—, R.sup.2 and R.sup.3 are each independently a monovalent organic group. ##STR00001##

A radiation-sensitive resin composition includes a resin including a structural unit having an acid-dissociable group, an onium salt compound represented by formula (1), and a solvent. R.sup.1 is a hydrogen atom or a monovalent group provided that the monovalent group is not a fluoro group or a monovalent organic group containing a fluorine atom. X.sup.1 and X.sup.2 are each independently a single bond, —O—, —S— or —NR′— wherein R′ is a hydrogen atom or a monovalent hydrocarbon group. In a case where X.sup.1 is —NR′—, R.sup.2 is a monovalent organic group or a hydrogen atom. In a case where X.sup.2 is —NR′—, R.sup.3 is a monovalent organic group or a hydrogen atom. In a case where neither X.sup.1 nor X.sup.2 is —NR′—, R.sup.2 and R.sup.3 are each independently a monovalent organic group. ##STR00001##

The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and an electrochemical device. The electrolyte includes an additive A and an additive B, the additive A is selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof, and the additive B is at least one unsaturated bond-containing cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, while an anode SEI film can be formed to avoid a contact between the anode and the electrode and thus to effectively reduce side reactions. ##STR00001##

The present disclosure relates to the field of energy storage materials, and particularly, to an electrolyte and an electrochemical device. The electrolyte includes an additive A and an additive B, the additive A is selected from a group consisting of multi-cyano six-membered N-heterocyclic compounds represented by Formula I-1, Formula I-2 and Formula I-3, and combinations thereof, and the additive B is at least one unsaturated bond-containing cyclic carbonate compound. The electrochemical device includes the above electrolyte. The electrolyte of the present disclosure can effectively passivate surface activity of the positive electrode material, inhibit oxidation of the electrolyte, and effectively reduce gas production of the battery, while an anode SEI film can be formed to avoid a contact between the anode and the electrode and thus to effectively reduce side reactions. ##STR00001##

A system and a process for co-producing dimethyl carbonate and ethylene glycol. The system comprises an interconnected ethylene carbonate preparation unit and an ethylene carbonate alcoholysis unit. The ethylene carbonate preparation unit comprises a fixed bed reactor and a light-component stripping column connected to each other. The fixed bed reactor is filled with a supported ionic liquid catalyst. The process comprises the steps of: reacting carbon dioxide and ethylene oxide as raw materials in the fixed bed reactor to produce ethylene carbonate, purifying the ethylene carbonate and then mixing it with an alcoholysis reaction catalyst, and reacting the mixture with methanol in a reactive distillation tower, producing dimethyl carbonate and ethylene glycol. The process increases the conversion rate of ethylene oxide and avoids the need for a process of separating conventional homogeneous catalysts from ethylene carbonate, thereby reducing process energy consumption and simplifying process procedures.