摘要:
Apparatus for optimizing a treatment for removing organic substances from a chemical process stream wherein known quantities and kinds of organic or other compounds are injected into and dissolved in the stream prior to treatment thereof. Samples of the compounds are extracted from the stream before and after treatment thereof and compared with one another to determine the efficiency of the treatment. The injecting apparatus is one that enables a substance that is at least partially immiscible with the liquid of the stream to be injected into the stream at a velocity sufficiently great to cause adequate dissolution of the substance in the stream.
摘要:
This invention relates to a self-regulated apparatus and method for extracting biodegradable and/or strippable constituents from a gaseous stream by the action of biomass which consumes or degrades such substances. Such self-regulation permits the monitoring and optimization of the bioactivity of the system and the overall degree of treatment of the gaseous stream.
摘要:
Improved packings for columns useful in gas chromatography are made by a multistep process whereby polysiloxane molecules having various organic substituents are chemically bonded to the surface of a siliceous support. The process comprises one or more cycles of successive reactions with an activated support surface of silicon tetrachloride, an organic dichlorosilane, silicon tetrachloride a second time, a polysiloxane polyol, with intermediate hydrolyses where appropriate to provide reactive terminal silanol groups and a final capping reaction with an organic monochlorosilane. The packing as so prepared is further improved by coating with a conventional stationary phase.
摘要:
A process for the dehydrohalogenation of a (polyhaloalkyl)benzene containing a benzylic halogen such as 1,3-dichloro-5-(2,4,4,4-tetrachlorobutyl)-benzene by contacting the (polyhaloalkyl)benzene with a Lewis acid such as AlCl.sub.3 deposited on an inert support such as silica gel or alumina under conditions sufficient to catalyze said dehydrohalogenation to form a (polyhaloalkenyl)benzene such as 3,5-dichloro-.alpha.-(2,2,2-trichloroethyl)styrene.
摘要:
This invention relates to a self-regulated apparatus and method for extracting biodegradable and/or strippable constituents from a fluid stream by the action of biomass which consumes or degrades such substances or by gas stripping. Such self-regulation permits the monitoring and optimization of the bioactivity of the system and the overall degree of treatment of the fluid stream.
摘要:
Apparatus and methods for on-line analysis of multiple stream processes wherein each stream has an influent delivered to a treatment zone and an effluent discharged from such zone and wherein both the influent and effluent are analyzed and the analyses compared for the evaluation of the effectiveness of the treatment.
摘要:
Method for optimizing a treatment for removing organic substances from a chemical process stream wherein known quantities and kinds of organic or other compounds are injected into and dissolved in the stream prior to treatment thereof. Samples of the compounds are extracted from the stream before and after treatment thereof and compared with one another to determine the efficiency of the treatment.
摘要:
In the production of a wall coated open tubular capillary chromatographic column, improved deactivation of the inner surface of a glass or fused silica capillary tube prior to coating with stationary phase is obtained by a multi-step process whereby siloxane polymer molecules are chemically bonded to the capillary inner surface. The process comprises multiple cycles of successive reactions with silicon tetrachloride and a diorganodichlorosilane vapor with intermediate hydrolyses and a final capping reaction with a triorganochlorosilane. The deactivated surface is adapted to coating with an apolar liquid stationary phase.
摘要:
Improved packings for columns useful in gas chromatography are made by a multistep process whereby polysiloxane molecules having various organic substituents are chemically bonded to the surface of a siliceous support. The process comprises one or more cycles of successive reactions with an activated support surface of silicon tetrachloride, an organic dichlorosilane, silicon tetrachloride a second time, a polysiloxane polyol, with intermediate hydrolyses where appropriate to provide reactive terminal silanol groups and a final capping reaction with an organic monochlorosilane. The packing as so prepared is further improved by coating with a conventional stationary phase.
摘要:
Highly effective chromatographic column packings are prepared by reacting hydroxyl groups on a silica surface with SiCl.sub.4 and then reacting the chlorosilylated surface with a polyglycol or polymeric glycol ester in a slurry reaction. Residual chlorosilane groups on the reacted surface are neutralized by reaction with methanol or other lower alkanol. The resulting modified silica has a bonded, essentially monomolecular organic surface film which provides thermal stability, uniform efficiency, and rapid analysis when the material is used as a column packing in gas-liquid chromatography.