1. An electric cutting device, comprising:
a housing, with a power supply unit disposed in a lower portion of the housing so as to provide power to a motor;
a motor, disposed in the housing and connected with a speed reduction gear set, wherein a transmission gear is connected with an output shaft of the speed reduction gear set and is engaged with a driving gear, and wherein a threaded rod is fixedly connected with the driving gear and a thread pattern of a front portion of the threaded rod is a mirror image to a thread pattern of a rear portion of the threaded rod;
an activation button, extending out of the housing and connected with a control circuit;
a control circuit, disposed in the housing and connected with the motor for activating the motor to rotate in a first direction or a secondreversed direction when receiving a signal from the activation button;
a separation plate, with a front end disposed between the front portion and the rear portion of the threaded rod;
a first assembly, threaded onto the rear portion of the threaded rod;
a second assembly, threaded onto the front portion of the threaded rod;
two supporting rods, pivotally connected with the first assembly;
two connecting rods, with a bent portion provided near a front portion of either connecting rod, wherein a rear end of the either connecting rod is connected with a front end of a corresponding supporting rod and the bent portion is pivotally connected with the second assembly; and
a cutting assembly, comprising a first cutting member and a second cutting member, wherein two blades of the cutting assembly extend out of the housing and a rear end of either cutting member is connected with a front end of a corresponding connecting rod.
2. The electric cutting device as in claim 1, wherein the power supply unit is a regular battery, a lithium battery or a power source outside of the electric cutting device.
3. The electric cutting device as in claim 1, wherein a space is provided in front of the speed reduction gear set so that the transmission gear and the driving gear is disposed in the space.
4. The electric cutting device as in claim 1, wherein a power switch extends out of the housing, and wherein the power switch is connected with the control circuit and is used to control whether power is fed to the control circuit.
5. The electric cutting device as in claim 1, wherein the driving gear has a gear ratio larger than that of the transmission gear.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method to extract one or more organic compounds from an aqueous mixture, comprising contacting the aqueous mixture with an extraction liquid of Formula I, II or III:
wherein each R and R\u2032 is independently C3-C5 alkyl, and each R\u2033 is independently selected from C3-C5 alkyl and C3-C5 acyl,
to produce a biphasic composition;
and separating at least a portion of the extraction liquid phase from the aqueous phase to provide an extract solution comprising the organic compound.
2. The method of claim 1, wherein the organic compound is a C2-C6 monohydric alcohol, a C2-C6 carboxylic acid, or a C2-C6 aldehyde or ketone.
3. The method of claim 1, wherein the organic compound is selected from the group consisting of acetic acid, propionic acid, butyric acid, valeric acid, hexanoic acid, hydroxypropionic acid, hydroxybutyric acid, ethanol, propanol, isopropanol, 1-butanol, 2-butanol, isobutanol, t-butanol, 1-pentanol, 2-pentanol, 2-methyl-2-pentanol, 1-hexanol, 2-hexanol, and 2-methyl-2-pentanol.
4. The method of claim 1, wherein the aqueous mixture is a fermentation broth or partially processed fermentation broth.
5. The method of claim 1, wherein the organic compound is ethanol, acetic acid, 1-butanol, or isobutanol.
6. The method of claim 5, wherein the organic compound is acetic acid, and wherein the aqueous mixture has a pH of about 9 or less.
7. The method of claim 1, wherein the extraction liquid comprises a compound of Formula I.
8. The method of claim 7, wherein the extraction liquid is a compound of Formula I, and wherein all of the R groups are the same.
9. The method of claim 8, wherein the extraction liquid is diethylene glycol dibutyl ether (DEB).
10. The method of claim 8, wherein the extraction liquid is diethylene glycol diisobutyl ether.
11. The method of claim 1, wherein the extraction liquid comprises a compound of Formula II.
12. The method of claim 1, wherein the extraction liquid comprises a compound of Formula III.
13. The method of claim 12, wherein the extraction liquid comprises tripropionin.
14. The method of claim 1, wherein the organic compound is acetic acid, and wherein the acetic acid is extracted from the aqueous mixture with a distribution coefficient of about 0.5 to about 1.0.
15. The method of claim 1, wherein the organic compound is ethanol, and wherein the ethanol is extracted from the aqueous mixture with a distribution coefficient of about 0.8 to about 1.4.
16. The method of claim 1, wherein the organic compound is isobutanol, and wherein the isobutanol is extracted from the aqueous mixture with a distribution coefficient of about 2.3 to about 4.1.
17. The method of claim 1, wherein the organic compound is hydroxymethylfurfural.
18. The method of claim 17, wherein the hydroxymethylfurfural is extracted from the aqueous mixture with a distribution coefficient of about 0.4 to about 0.7.
19. The method of claim 1, wherein the organic compound is furfural.
20. The method of claim 19, wherein the furfural is extracted from the aqueous mixture with a distribution coefficient of about 0.8 to about 1.2.