Detection of chloromethyl methyl ether or bis-chloro-methyl ether
AssigneeThe Dow Chemical Company
InventorRichard A. Solomon
Life of this patent
Estimating the term…
Abstract
Method for quantitatively determining the presence of chloromethyl methyl ether and/or bis-chloromethyl ether in a fluid. The above compounds are reacted with a reactant from the group consisting of an alkali metal salt of a lower alcohol, an alkali metal salt of phenol or an alkyl phenol, an alkali metal salt of a chlorophenol or bromophenol, an alkali metal salt of an alkoxy phenol, an alkali metal salt of a chlorinated pyridinol, and an alkali metal salt of thiophenol or a chlorinated thiophenol, dissolved in a lower alcohol, to form derivatives which provide suitable stability, specificity and sensitivity when applied to a gas chromatograph utilizing a suitable detector.
Claims22
A method to determine the presence of chloromethyl methyl ether or bis-chloromethyl ether in a fluid, comprising reacting chloromethyl methyl ether or bis-chloromethyl ether from said fluid with an amount in excess of the stoichiometric amount of an alkali metal salt of an organic hydroxy compound of the formula
- 1. R--OH wherein R is lower alkyl, phenyl, chlorophenyl, bromophenyl, alkoxy phenyl, or alkyl phenyl or
- 2. thiophenyl or chlorinated thiophenyl or
- 3. chlorinated pyridinyl, said compound being dissolved in lower alcohol, running the reaction product through a suitable gas chromatographic column, then passing the eluted components therefrom through a detector and displaying the output of said detector on a suitable readout device.
A method to determine the presence of chloromethyl methyl ether or bis-chloromethyl ether in a gas comprising passing a predetermined amount of gas through a confined stoichiometric excess of an alkali metal salt of an organic hydroxy compound selected from the group consisting of a lower alcohol, phenol, a chlorophenol, a bromophenol, an alkyl phenol, an alkoxy phenol, a chlorinated pyridinol, thiophenol or a chlorinated thiophenol which hydroxy compound is dissolved in lower alcohol, adding water and hydrocarbon solvent to said compound, agitating the mixture of compound, water and solvent, partitioning said hydrocarbon solvent from the remainder of said mixture, withdrawing part of said hydrocarbon solvent and applying said withdrawn part to suitable gas chromatographic apparatus, applying eluted components from said chromatographic apparatus to a suitable detector providing an output signal, and applying said output signal to a suitable readout device.
A method of determining the presence of chloromethyl methyl ether or bis-chloromethyl ether in a liquid, comprising mixing a predetermined amount of said liquid with a stoichiometric excess amount of an alkali metal salt of a lower alcohol, said salt being dissolved in a lower alcohol, to form a derivative compound, running said derivative through a suitable gas chromatographic apparatus, passing material eluting from said apparatus through a suitable detector providing an output signal, and recording said output signal on a suitable readout device.
Dependencies are inferred from the claim text.