Method and apparatus for the controlled dilution of organometallic compounds
First Claim
1. A method for controlling the concentration of an organometallic compound in hydrocarbon solvent, the method comprising the steps of:
- supplying a flow of hydrocarbon solvent at a first flow rate;
supplying a flow of an organometallic composition containing at least one organometallic compound and at least one hydrocarbon medium, all at a second flow rate;
mixing the solvent with the organometallic composition to form a blended organometallic composition;
measuring over time the concentration of organometallic compound in said blended composition using spectroscopic analysis; and
adjusting at least one of said first and second flow rates such that the measured concentration of organometallic compound in said composition approximates a predetermined target concentration value.
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Abstract
An apparatus and method for allowing the industrial use of a high-concentration supply of an organometallic composition, such as an alkyllithium composition, with processes requiring low-concentration organometallic feeds by blending a supply of organometallic with a supply of hydrocarbon solvent, analyzing the concentration of organometallic within the blend using spectroscopic analysis to determine the concentration of organometallic, communicating the concentration value to a control apparatus which compares the actual concentration value with a previously determined desired concentration value and, adjusting the rate of supply of the organometallic, the rate of supply of the hydrocarbon solvent, or the rate of supply of both the organometallic and the solvent to obtain a blended organometallic stream of the desired concentration.
26 Citations
52 Claims
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1. A method for controlling the concentration of an organometallic compound in hydrocarbon solvent, the method comprising the steps of:
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supplying a flow of hydrocarbon solvent at a first flow rate;
supplying a flow of an organometallic composition containing at least one organometallic compound and at least one hydrocarbon medium, all at a second flow rate;
mixing the solvent with the organometallic composition to form a blended organometallic composition;
measuring over time the concentration of organometallic compound in said blended composition using spectroscopic analysis; and
adjusting at least one of said first and second flow rates such that the measured concentration of organometallic compound in said composition approximates a predetermined target concentration value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method for controlling the concentration of an alkyllithium composition, comprising the steps of:
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supplying a hydrocarbon solvent;
supplying an alkyllithium;
mixing the alkyllithium with the solvent to form a blended alkyllithium composition;
measuring the concentration of the alkyllithium within said blended composition using Fourier transform infra-red spectroscopy; and
terminating the addition of said solvent, said alkyllithium, or both, to said composition when the measured concentration of the alkyllithium in said composition approximates a predetermined target concentration value. - View Dependent Claims (39)
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40. An apparatus for controlling the concentration of an organometallic compound in hydrocarbon solvent, the apparatus comprising:
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a hydrocarbon solvent inlet, having a first valve in-line therewith;
an organometallic compound inlet, having a second valve in-line therewith;
a mixer in fluid communication with both the hydrocarbon solvent inlet and the organometallic compound inlet;
an organometallic/hydrocarbon composition outlet in fluid communication with the mixer;
a spectrometer having an input in optical communication with said composition outlet;
an spectroscopic analyzer in communication with said spectrometer; and
a control unit in communication with analyzer and operatively connected to at least one of said first and said second valves. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification