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Alkyl xanthogen acrylonitrile ester is also a derivative of xanthate, which has the following structural formula:
S
/
ROC-SCH=CHCN
R is an alkyl group having up to twelve carbon atoms or an aryl group, but R is an alkyl group as discussed herein.
1. The method for preparing alkyl acrylonitrile acrylate can be prepared by using cis or trans β-halogenated acrylonitrile with the corresponding xanthate, and the reaction formula is as follows:
S S
/ /
ROC—SNa+XCH=CHCN—→ROC—SCH=CHCN+NaX
In the reaction formula, X may be chlorine or bromine , and the xanthate may be sodium xanthate or potassium xanthate, and the reaction may be carried out in water or an organic solvent (such as acetone, chloroform, diethyl ether, etc.), and the reaction temperature is 0°. - 30 ° C, with methyl, ethyl, isopropyl, n-butyl, sec-butyl, pentane, hexanyl, dodecyl xanthate and β-halogenated acrylonitrile, respectively, to obtain the corresponding alkyl xanthate propylene Nitrile ester.
2. Acrylonitrile alkyl ester of xanthan COLLECTING copper ore COLLECTING alkyl xanthate ester of Copper acrylonitrile, alkyl xanthate ester propionitrile as collector, tailings The copper-containing grade is the lowest, that is, its ability to capture is the strongest; the comparison of alkylxanthic acid with alkylxanthate propionitrile ester and alkylxanthate ester is shown in Table 1.
It can be seen from Table 1 that when the ore is of the same nature, the flotation conditions are the same, and the dosage of the agent is the same, when the isocyanide is used as the collector, the tailings grade is in the middle, that is, its collecting ability is slightly lower; When propylene xanthate is a collector, its tailings grade is the highest, that is, its harvesting ability is the weakest among the three types of collectors.
It can be seen from Table 1 that when the ore is of the same nature, the flotation conditions are the same, and the dosage of the agent is the same, when the isocyanide is used as the collector, the tailings grade is in the middle, that is, its collecting ability is slightly lower; When propylene xanthate is a collector, its tailings grade is the highest, that is, its harvesting ability is the weakest among the three types of collectors.
Test results of several chemical flotation copper sulfide ore Table 1
Ore and flotation conditions | Collector | Tailings containing copper | |
Types of | Dosage (g / ton) | ||
Copper sulfide ore containing 0.68% Cu PH = 7.8 Polypropylene glycol 45 g / ton Floating for 4 minutes Copper sulfide containing 0.8% Cu PH = 7.7 Coal oil 15 g / t Cresol 40 g / ton Floating for 6 minutes | (1) Alkyl xanthogen acrylate: S / Propyl amyl phthalate C 5 H 11 OC-SCH 2 CH=CH 2 (2) alkyl xanthogen propionitrile ester: S / Isopropyl xanthogen propionitrile ester (CH 5 ) 2 CHOC-SCH 2 CH 2 CN S / Sec-butylxanthine propionitrile C 2 H 5 CHOC-SCH 2 CH 2 CN                         CH 3 S / Pentylxanthine propionitrile C 5 H 11 OC-SCH 2 CH 2 CN S / Ethyl xanthogen propionitrile ester C 2 H 5 CO-SCH 2 CH 2 CN (3) Alkyl xanthogen acrylonitrile ester: Isopropyl xanthogen acrylonitrile ester (cis) S / (CH 3 ) 2 CHOC—SCH = CHCN Isopropyl xanthogen acrylonitrile ester (trans) S / (CH 3 ) 2 CHOC—SCH = CHCN Isopropyl xanthogen acrylonitrile ester (cis) Ethyl valerate (cis) S / C 5 H 11 OCSCH = CHCN Ethyl xanthogen acrylonitrile ester (cis) S / C 2 H 5 OC—SCH = CHCN | 22.5 22.5 22.5 22.5 22.5 22.5 13.6 13.5 13.5 13.5 | 0.16 0.09 0.10 0.11 0.21 0.081 0.13 0.16 0.16 0.17 |
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