摘要:
Methods are described for converting carbohydrates including, e.g., monosaccharides, disaccharides, and polysaccharides in ionic liquids to value-added chemicals including furans, useful as chemical intermediates and/or feedstocks. Fructose is converted to 5-hydroxylmethylfurfural (HMF) in the presence of metal halide and acid catalysts. Glucose is effectively converted to HMF in the presence of chromium chloride catalysts. Yields of up to about 70% are achieved with low levels of impurities such as levulinic acid.
摘要:
Methods are described for converting carbohydrates including, e.g., monosaccharides, disaccharides, and polysaccharides in ionic liquids to value-added chemicals including furans, useful as chemical intermediates and/or feedstocks. Fructose is converted to 5-hydroxylmethylfurfural (HMF) in the presence of metal halide and acid catalysts. Glucose is effectively converted to HMF in the presence of chromium chloride catalysts. Yields of up to about 70% are achieved with low levels of impurities such as levulinic acid.
摘要:
Embodiments of the present disclosure relate generally to a collaborative achievement system for: detecting, at a client device associated with a first user, a collaborative achievement between at least the first user and a second user; selecting an achievement designator based on attributes of the collaborative achievement, wherein the achievement designator comprises personalization instructions for the achievement designator; retrieving, at the client device, user profile information from a first user account and a second user account associated with the first user and the second user; personalizing the achievement designator based on the user profile information and the personalization instructions; and causing display of a presentation of the personalized achievement designator at the client device.
摘要:
A method of producing a carbonate product including mixing a DMC and methanol mixture with an alcohol, reacting the DMC with the alcohol to form carbonate product, and removing a substantial portion of unreacted DMC and methanol. In one embodiment, the method may be repeated to reach a desired alcohol conversion by adding more DMC and methanol mixture.
摘要:
Methods are described for converting carbohydrates including, e.g., monosaccharides, disaccharides, and polysaccharides in ionic liquids to value-added chemicals including furans, useful as chemical intermediates and/or feedstocks. Fructose is converted to 5-hydroxylmethylfurfural (HMF) in the presence of metal halide and acid catalysts. Glucose is effectively converted to HMF in the presence of chromium chloride catalysts. Yields of up to about 70% are achieved with low levels of impurities such as levulinic acid.
摘要:
A process includes receiving a process stream including at least about 80.0% by weight propylene glycol, and contacting the process stream with an absorbent material to produce a product stream. The absorbent material is configured to preferentially absorb ethylene glycol relative to propylene glycol.
摘要:
Carbon nanotubes are grown by supplying raw material gas 30 comprising a carbon compound to be a raw material of the carbon nanotubes into the inside of a reaction vessel tube 14 in which a catalyst 26 to grow the carbon nanotubes is charged. At this time, halogen-containing material gas 32 to reduce the amount of a carbon product such as amorphous carbon produced besides carbon nanotubes that deposits on the surface of catalyst particles 44 due to supply of the raw material gas 30 is further supplied into the inside of the reaction vessel tube 14. Thereby, it is possible to produce elongated carbon nanotubes.
摘要:
A process includes receiving a process stream including at least about 80.0% by weight propylene glycol, and contacting the process stream with an absorbent material to produce a product stream. The absorbent material is configured to preferentially absorb ethylene glycol relative to propylene glycol.
摘要:
The present invention relates to a vegetable oil based autocatalytic polyol derived from the reaction product of an epoxidized vegetable oil and an alkanolamine. The autocatalytic polyol according to the present invention may be used as a replacement for all or a portion of petroleum derived polyols generally used in the production of polyurethane materials. The polyurethane materials produced may be used in a variety of applications, such as, foam, elastomer and coating applications.
摘要:
Carbon nanotubes are grown by supplying raw material gas 30 comprising a carbon compound to be a raw material of the carbon nanotubes into the inside of a reaction vessel tube 14 in which a catalyst 26 to grow the carbon nanotubes is charged. At this time, halogen-containing material gas 32 to reduce the amount of a carbon product such as amorphous carbon produced besides carbon nanotubes that deposits on the surface of catalyst particles 44 due to supply of the raw material gas 30 is further supplied into the inside of the reaction vessel tube 14. Thereby, it is possible to produce elongated carbon nanotubes.