Method and apparatus suitable for repeated, accurate chemical analyses
AssigneePhillips Petroleum Company
InventorsDonald D. DeFord, Edwin K. Clardy, Edward N. Fuller
Life of this patent
Estimating the term…
Abstract
A continually repeated chemical analysis of a process stream sample is effected by interposing the sample in a flow of titrant, flow of which is interrupted only to permit the interposition of the sample in the line of flow. A holding zone or chamber, e.g. a chromatographic column receives and holds titrant until the interposed sample in the column is titrated. Reaction product eluted from the column is detected.
Claims29
A method for effecting a repeated chemical analysis of a process stream which comprises establishing a first flow of a stream of a first reactant into a reaction zone, retaining in said zone first reactant entering said zone, continuing said first flow until there is established in said zone a quantity of first reactant sufficient to effect in said zone a reaction therewith and with a second reactant when the latter has entered said zone, then momentarily discontinuing said first flow and simultaneously initiating a second flow of a predetermined quantity of said second reactant into said zone, then immediately upon the termination of said second flow recommencing said first flow, removing reaction product from said reaction zone, and determining at least one of the amount of and nature of reaction product thus formed and removed from said zone.
An apparatus for effecting a repeated chemical analysis of a process stream which comprises in combination a reagent supplying means, and a sample supplying means, a means for receiving and holding one of said reagent and sample, until both are in said means for holding and have reacted therein, a flow control means adapted to alternately supply said reagent at a predetermined quantity of said sample to, into and through said holding means, means to detect a difference in a property of the effluent from said holding means when said effluent is constituted by reagent at one time and by reaction product at another, and means to record a signal representative of the change or difference in said property while said difference is extant.
Dependencies are inferred from the claim text.