Purifying method for electronic-grade hexane
A purification method, n-hexane technology, applied in chemical instruments and methods, hydrocarbon purification/separation, adsorption purification/separation, etc., can solve the problem of low yield, achieve the effect of improving purity and ensuring yield
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0037] In a stirred reactor equipped with concentrated sulfuric acid (98.5 wt%) and N-methylpyrrolidone bisulfate with a volume ratio of 5:1, put industrial-grade n-hexane crude product (purity 95.0 %), and kept stirring, standing to separate layers, the upper layer is the treated crude n-hexane. This reaction was repeated three times.
[0038] The above treated crude n-hexane was passed through an adsorption column of 5A molecular sieve at 5 column volumes / hour to remove moisture.
[0039] Finally, the crude n-hexane from which moisture has been removed is added to an extractant that accounts for 1.5 volumes of the crude n-hexane to pass through the extractive distillation column. The extractant is a mixture of dimethyl phthalate and DMF at a volume ratio of 1:0.2. The upper part of the extractive distillation tower is fed with crude normal hexane at a flow rate of 2Kg / h, and the lower part of the extractive distillation tower is fed with dimethyl phthalate at a flow rate of...
Embodiment 2
[0041] In the stirred reactor equipped with concentrated sulfuric acid (92.5 wt%) and N-methylpyrrolidone bisulfate with a volume ratio of 9:1, put industrial-grade n-hexane crude product (purity 96 %), and kept stirring, standing to separate layers, the upper layer is the treated crude n-hexane. This reaction was repeated three times.
[0042] The above treated crude n-hexane was passed through an adsorption column of 5A molecular sieve at 15 column volumes / hour to remove moisture.
[0043] Finally, the crude n-hexane from which moisture has been removed is added to an extractant which accounts for 1.8 volumes of the crude n-hexane to pass through the extractive distillation column. The extractant is a mixture of dimethyl phthalate and DMF at a volume ratio of 1:0.25. The upper part of the extractive distillation tower is fed with crude normal hexane at a flow rate of 6Kg / h, and the lower part of the extractive distillation tower is fed with dimethyl phthalate at a flow rate...
Embodiment 3
[0045] In a stirred reactor equipped with concentrated sulfuric acid (95.5 wt%) and N-methylpyrrolidone bisulfate with a volume ratio of 5:1, put industrial-grade n-hexane crude product (purity 97 %), and kept stirring, standing to separate layers, the upper layer is the treated crude n-hexane. This reaction was repeated three times.
[0046] The above treated crude n-hexane was passed through an adsorption column of 5A molecular sieve at 15 column volumes / hour to remove moisture.
[0047] Finally, the crude n-hexane from which moisture has been removed is added to an extractant which accounts for 3 volumes of the crude n-hexane and passes through the extractive distillation column. The extractant is a mixture of dimethyl phthalate and DMF at a volume ratio of 1:0.30. The upper part of the extractive distillation tower is fed with crude normal hexane at a flow rate of 6Kg / h, and the lower part of the extractive distillation tower is fed with dimethyl phthalate at a flow rate ...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More