摘要:
To reduce acetal concentrations when separating ethanol from a crude product in one or more distillation column, at least one of the columns is operated at a higher pressure to increase the equilibrium constant that favors hydrolysis of the acetal. The crude product may comprise ethanol, acetaldehyde, water and one or more acetals, such as diethyl acetal. The acetal concentration may be reduced thus reducing the need to separate acetal from the crude product.
摘要:
A process is described for producing an alcohol product, in which (a) a first feed composition comprising acetic acid is converted to a product comprising acetone; and (b) a second feed composition comprising at least part of the acetone produced in (a) is hydrogenated in the presence of a catalyst to produce a hydrogenation effluent comprising isopropanol.
摘要:
The invention pertains to a method of relieving pain by administering a controlled release pharmaceutical tablet containing oxymorphone which produces a mean minimum blood plasma level 12 to 24 hours after dosing, as well as the tablet producing the sustained pain relief.
摘要:
Recycle streams in an ethanol production process are hydrolyzed to reduce ethyl acetate concentration. In the process, acetic acid is hydrogenated to form a crude ethanol product, which undergoes a separation or purification process. Ethyl acetate is formed as a byproduct of the hydrogenation of acetic acid. The hydrolysis of recycle steams from the separation process can reduce the concentration of ethyl acetate, converting some or all of the ethyl acetate to acetic acid and ethanol.
摘要:
A process for producing ethanol and, in particular, to a process for reducing the concentration of acetic acid in a crude ethanol product by esterifying unreacted acetic acid with an alcohol.
摘要:
Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid using an extractive distillation column. A diluted acid stream, comprising less than 30 wt. % acetic acid, is used as the extractive agent and is fed at a point above the crude feed stream. The column yields a residue that comprises ethanol, acetic acid, and water. The diluted acid stream may be separated from the residue and returned to the extractive distillation column.
摘要:
The present invention relates to an adjustable slump mold for molding a clay slab into a ceramic object. The mold includes a plurality of elongate members. The mold also includes a plurality of connectors connected to and extending from first ends of the elongate members, respectively. Each connector is shaped to slidably receive an adjacent one of the elongate members. The elongate members are thereby slidably connected together via the connectors. The elongate members so connected together form an adjustable mold shape.
摘要:
A liquid crystal display (LCD) and a driving method thereof. The LCD includes: a liquid crystal panel which includes a plurality of pixels formed in intersection areas between a plurality of gate lines and a plurality of data lines, wherein a pair of adjacent pixels share the same data line and are located between a pair of gate lines; a common voltage generator which shifts and outputs a common voltage signal having a polarity, which is reversed one time for a period time and repeated consecutively two time for a ½ period time, for a predetermined time; and a source driver which synchronizes a data signal of a line inversion system with an output timing of the common voltage signal and outputs the data signal to an opposite polarity to a polarity of the common voltage signal to drive the plurality of pixels in a dot inversion system.
摘要:
The present invention relates to a cutting platform for cutting and shaping a clay slab. The platform has a water-absorbing cutting mat with a top surface for receiving the clay slab. The platform has a bottom surface opposite the top surface. The bottom surface is adapted to overlay a board. The platform includes grid-pattern indicia extending across the top surface of the mat. The grid-pattern indicia includes a first set of spaced-apart lines in parallel with each other and a second set of spaced-apart lines in parallel with each other. The first set of lines intersect with and are perpendicular to the second set of apart lines. The grid-pattern indicia includes unit measurement indicia. Cutting of the clay slab to a desired shape is facilitated by the cutting platform thereby.