Abstract: Embodiments relate to a continuous process for the production of hydroxyethylpiperazine that includes feeding neat piperazine, recycled piperazine, and ethylene oxide to a reactor to form crude hydroxyethylpiperazine, in which the reactor is a continuous stirred tank reactor or a plug flow reactor. The process further includes continuously feeding the crude hydroxyethylpiperazine from the reactor to a distillation system that includes at least one distillation column, the distillation system produces at least a recycled piperazine stream and a hydroxyethylpiperazine stream, the recycled piperazine stream includes the recycled piperazine that is fed to the reactor to form the crude hydroxyethylpiperazine, and the hydroxyethylpiperazine stream includes at least 60 wt % of hydroxyethylpiperazine based on a total weight of the hydroxyethylpiperazine stream.

Abstract: An aqueous absorption medium for removal of acid gases from a gaseous stream includes at least one tertiary alkanolamine and at least one secondary alkanolamine. A total weight of the at least one tertiary alkanolamine and the at least one secondary alkanolamine account for an amine weight of the aqueous absorption medium. The amine weight of the aqueous absorption medium is from 25 wt % to 65 wt %, based on a total weight of the aqueous absorption medium, and the at least one secondary alkanolamine is present in an amount from 11 wt % to 45 wt %, based on the amine weight of the aqueous absorption medium.

Abstract: Embodiments relate to a continuous process for the production of hydroxyethylpiperazine that includes feeding neat piperazine, recycled piperazine, and ethylene oxide to a reactor to form crude hydroxyethylpiperazine, in which the reactor is a continuous stirred tank reactor or a plug flow reactor. The process further includes continuously feeding the crude hydroxyethylpiperazine from the reactor to a distillation system that includes at least one distillation column, the distillation system produces at least a recycled piperazine stream and a hydroxyethylpiperazine stream, the recycled piperazine stream includes the recycled piperazine that is fed to the reactor to form the crude hydroxyethylpiperazine, and the hydroxyethylpiperazine stream includes at least 60 wt % of hydroxyethylpiperazine based on a total weight of the hydroxyethylpiperazine stream.

Abstract: A nanosample capable of near-infrared light-triggered release of therapeutic molecules. The nanosample includes a plurality of nanocomplexes. Each of the nanocomplexes includes a nanoshell; a host molecule linked to the nanoshell; and a guest molecule linked to the host molecule. The nanoshell includes a shell. The nanocomplex has a plasmon resonance wavelength. When irradiated with electromagnetic radiation of the plasmon resonance wavelength, plasmon resonance of the nanocomplex releases the guest molecule. The nanoshell may also include a core, where the shell surrounds the core. The nanoshell may be a nanomatryoshka. A link between the nanoshell and the host molecule may be a gold-thiol interaction. The shell may include at least one metal, such as gold or silver. The core may be a liposome and/or silica. The host molecule may be: synthetic polymers, biopolymers, polynucleotides, nucleic acids, polypeptides, polysaccharides, polyterpenes, lipids, aptamers, and/or proteins.

Abstract: The present invention relates to a method of coating a pipeline field joint comprising the steps of (1) applying a layer of a first coating material comprising a substantially linear ethylene polymer, a linear ethylene polymer, or an olefin block copolymer to the uncoated region of the field joint and (2) subsequently applying a layer of a second coating material comprising a polyurethane, an epoxy, or a cross linked polyethylene to the field joint.