The invention relates to a process for the preparation of ethylene glycol from ethylene, which comprises contacting the carbon dioxide stream resulting from hydrolysing ethylene carbonate, or the condensate stream resulting from condensing said carbon dioxide stream, or the waste water stream resulting from removing water from the ethylene glycol stream, such stream comprising water, 2-chloroethanol and ethylene glycol and additionally comprising 2-iodoethanol or 2-bromoethanol, with an alkali metal containing basic compound to form a mixture comprising water, 2-chloroethanol and ethylene glycol and additionally comprising alkali metal iodide or alkali metal bromide which mixture is dehydrated.

A macromolecules containing a metal and a use thereof as a catalyst are disclosed. The macromolecules containing a metal may be obtained by causing a ligand to react with a zinc compound or a cobalt compound. The ligand has an imidazole group that is bonded to a macromolecule via a linker. The metal-containing macromolecules are highly active as a catalyst, stable, and easy to recover and reuse.

A macromolecules containing a metal and a use thereof as a catalyst are disclosed. The macromolecules containing a metal may be obtained by causing a ligand to react with a zinc compound or a cobalt compound. The ligand has an imidazole group that is bonded to a macromolecule via a linker. The metal-containing macromolecules are highly active as a catalyst, stable, and easy to recover and reuse.

Prodrugs of hydroxamate-based GCPII inhibitors and methods of their use for treating a disease or condition are disclosed.

Prodrugs of hydroxamate-based GCPII inhibitors and methods of their use for treating a disease or condition are disclosed.

An apparatus for converting a toxic gas to benign substances comprises a housing characterized with multi-stages including a first stage, a second stage, a third stage and a fourth stage coupled to one another in sequence, wherein the first stage comprises a catalytic system configured to convert the toxic gas into its derivatives; the second stage comprises a carbonaceous fibrous material adapted to capture the remaining toxic gas and the derivatives; the third stage comprises at least one oxidizer to oxidize the remaining toxic gas to benign substances including CO.sub.2 and water; and the fourth stage comprises a scrubber configured to remove all of volatile organic compounds or water molecules generated as part of the first and third stages.

An apparatus for converting a toxic gas to benign substances comprises a housing characterized with multi-stages including a first stage, a second stage, a third stage and a fourth stage coupled to one another in sequence, wherein the first stage comprises a catalytic system configured to convert the toxic gas into its derivatives; the second stage comprises a carbonaceous fibrous material adapted to capture the remaining toxic gas and the derivatives; the third stage comprises at least one oxidizer to oxidize the remaining toxic gas to benign substances including CO.sub.2 and water; and the fourth stage comprises a scrubber configured to remove all of volatile organic compounds or water molecules generated as part of the first and third stages.

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 method for direct synthesis of cyclic carbonates is achieved by reacting at least one epoxide with carbon dioxide in the presence of a choline catalyst, such as choline chloride, under mild conditions such as a temperature between about 25° C. to 150° C. and a pressure of from about atmospheric to 75 psi (0.52 MPa), in a cyclic carbonate solvent. The choline catalyst may be the only catalyst used, and a co-catalyst or hydrogen bond donor is not necessary. The concentration of choline catalyst in the solvent ranges from about 0.5 mol % to about 10 mol %, based on the epoxide.