Microfluidic flow process for making monomers
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsKamran B Ghiassi, Neil D Redeker, Alexander T Lonnecker, Jayden N. Glover
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Abstract
The present invention relates to a microfluidic flow process for making monomers, monomers made by such processes, and methods of using such monomers. In such process, microfluidic reaction technology is used to synthesize cyanation reaction products orders of magnitude faster than is possible in batch and continuous syntheses. The aforementioned process does require strictly regulated, highly toxic cyanogen chloride. Thus the aforementioned process is more economically efficient and reduces the environmental impact of thermosetting resin monomer production, and produces thermosetting resin monomers in greater purity than obtained through typical processes.
Claims16
A process of making a monomer said process comprising processing, in a microfluidic reactor the following materials:
- a) a multifunctional phenol;
- b) a cyanogen halide comprising chloride cyanogen and/or cyanogen bromide;
- and
- c) a base selected from the group consisting of an organic base, an inorganic base and mixtures thereof;
- at a temperature of from about −78° C. to about 0° C., said materials having residence time of from about 1 second to about 80 seconds.
A process of making a monomer said process comprising processing, in a microfluidic reactor the following materials:
- a) a multifunctional phenol comprising 1,1-Bis(4-hydroxyphenyl)ethane;
- b) a cyanogen halide;
- and
- c) a base comprising sodium hydroxide and/or triethylamine;
- at a temperature of from about −78° C. to about 25° C., said materials' having residence time of from about 0.1 seconds to about 600 seconds
- said process comprising combining:
- (i) a first solution comprising a material selected from the group consisting of said multifunctional phenol comprising 1,1-Bis(4-hydroxyphenyl)ethane;
- and said base comprising sodium hydroxide and/or triethylamine;
- and
- (ii) a second solution comprising a cyanogen halide;
- b) combining
- (i) a first solution comprising said multifunctional phenol comprising 1,1-Bis(4-hydroxyphenyl)ethane, a cyanogen halide, acetonitrile and an optional aprotic co-solvent selected from the group consisting of dichloromethane, acetonitrile and mixtures thereof;
- and
- (ii) said base comprising sodium hydroxide and/or triethylamine with the proviso that when said base is a solid base, said solid base is dissolved in a liquid prior to combining said solid base with said first solution;
- or
- c) simultaneously combining a first solution comprising said multifunctional phenol comprising 1,1-Bis(4-hydroxyphenyl)ethane, acetonitrile and an optional aprotic co-solvent selected from the group consisting of dichloromethane, acetonitrile and mixtures thereof;
- a second solution comprising a cyanogen halide, and an aprotic solvent selected from the group consisting of dichloromethane, acetonitrile and mixtures thereof;
- and a third solution comprising said base comprising sodium hydroxide and/or triethylamine with the proviso that when said base is a solid base, said solid base is dissolved in a liquid prior to combining said solid base with said first solution, and an optional aprotic solvent selected from the group consisting of dichloromethane, acetonitrile and mixtures thereof.
A process of making a monomer said process comprising processing, in a microfluidic reactor the following materials:
- a) a multifunctional phenol selected from the group consisting a 1,4-benzenediol, 1,3-benzenediol, 1,2-benzenediol, 2,2-Bis(4-hydroxyphenyl)propane, 1,1-Bis(4-hydroxyphenyl)ethane, 2,2-Bis(4-hydroxy-3-methylphenyl)propane, 2,2-Bis(4-hydroxyphenyl)hexafluoropropane, 3,4′,5-Trihydroxy-trans-stilbene 3,4′,5-Trihydroxy-cis-stilbene, 1,1-Bis(4-hydroxyphenyl)sulfone, phenylbis(4-hydroxyphenyl)phosphine oxide, phenylbis(3-hydroxyphenyl)phosphine oxide, tris(3-hydroxyphenyl)phosphine oxide, and mixtures thereof;
- b) a cyanogen halide selected from the group consisting of cyanogen chloride, cyanogen bromide and mixtures thereof;
- c) an inorganic base selected from the group consisting sodium hydroxide, lithium hydroxide, and mixtures thereof;
- d) a base comprising tetraalkyl ammonium hydroxides, at a temperature of from about −78° C. to about 25° C., said materials having residence time of from about 0.1 seconds to about 600 seconds.
Dependencies are inferred from the claim text.