# US 4,394,257 A · Froth flotation process

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- Number: US 4,394,257 A
- Document ID: US4394257A
- Status: Granted
- Kind: A
- Application number: 06/390,574
- Filed: 1982-06-21
- Granted: 1983-07-19
- Earliest claimed: 1979-11-19
- Assignees: American Cyanamid Company
- Inventors: Samuel S. Wang; Michael J. Scanlon
- Web page: https://patentgrep.com/patent/US4394257A

## CPC

- B03D 1/012: containing sulfur
- B03D 1/008: containing oxygen
- B03D 1/011: {Quaternary ammonium compounds}
- B03D 2201/04: Frothers
- B03D 2203/02: Ores
- B03D: FLOTATION; DIFFERENTIAL SEDIMENTATION (sedimentation in general B01D21/00; in combination with other separation of solids B03B; sink-float separation B03B5/28; detergents, soaps C11D)

## Abstract

A process for the recovery of mineral values by froth flotation in an aqueous medium employing a novel frother. Frothers prepared by Michael addition between alpha, beta-unsaturated ethylenic compounds and either alcohols, amines or mercaptans or by the condensation of HCN, aldehydes/ketones with either alcoholics, amines or mercaptans have been found to be effective in the froth flotation system and capable of reducing the required collector consumption.

## Claims

### Claim 1

A process for collecting mineral values from a sulfide ore wherein said process comprises mixing ground ore with water to form an aqueous ore pulp, adding to said aqueous ore pulp an effective amount of a frother, aerating said aqueous ore pulp and thereafter recovering said mineral values, wherein the frother is of the general structure: ##STR19## wherein R is taken from the group consisting of a saturated aliphatic radical of 1 to 12 carbon atoms, inclusive, a phenyl and an alkylaryl wherein the alkyl group consists of a saturated aliphatic radical of 1 to 6 carbon atoms, inclusive, W is taken from the group consisting of oxygen, imino and alkyl substituted imino wherein the alkyl radical consists of a saturated aliphatic radical of 1 to 12 carbon atoms, inclusive, n is an integer of 1 to 4, inclusive, and X and Y are individually either hydrogen or a saturated aliphatic radical of 1 to 8 carbon atoms, inclusive.

### Claim 2 (depends on 1)

The process of claim 1 wherein the sulfide ore is copper-molybdenum.

### Claim 3 (depends on 1)

The process of claim 1 wherein an effective amount is from about 0.01 pound of frother per ton of ore to about 1.0 pound of frother per ton of ore.

### Claim 4 (depends on 1)

The process of claim 1 wherein W is oxygen.

### Claim 5 (depends on 4)

The process of claim 4 wherein the frother is isobutyl cyanoethyl ether.

### Claim 6 (depends on 1)

The process of claim 1 wherein W is nitrogen.

### Claim 7 (depends on 6)

The process of claim 6 where the frother is isobutyl cyanoethyl amine.

### Claim 8

A process for collecting mineral values from an ore wherein said process comprises mixing ground ore with water to form an aqueous ore pulp, adding to said aqueous ore pulp an effective amount of a frother, aerating said aqueous ore pulp and thereafter recovering said mineral values, wherein the frother is of the general structure: ##STR20## wherein R is taken from the group consisting of a saturated aliphatic radical of 1 to 12 carbon atoms, inclusive, a phenyl and an alkylaryl wherein the alkyl group consists of a saturated aliphatic radical of 1 to 6 carbon atoms, inclusive; n is an integer of 1 to 4, inclusive, X and Y are individually either hydrogen or a saturated aliphatic radical of 1 to 8 carbon atoms, inclusive; and Z is taken from the group consisting of ##STR21## wherein R" and R"' are aliphatic radicals having 1 to 8 carbon atoms, inclusive.

### Claim 9 (depends on 8)

The process of claim 8 wherein an effective amount is from about 0.01 pound of frother per ton of ore to about 1.0 pound of frother per ton of ore.

### Claim 10 (depends on 8)

The process of claim 8 wherein the frother is isobutyl cyanoethyl sulfide.

### Claim 11 (depends on 8)

The process of claim 8 wherein the frother is isobutyl cyanoethyl ether.

### Claim 12 (depends on 8)

The process of claim 8 wherein the frother is isobutyl cyanoethyl amine.

### Claim 13 (depends on 8)

The process of claim 8 wherein the ore is a sulfide ore.

### Claim 14 (depends on 13)

The process of claim 13 wherein the sulfide ore is copper-molybdenum.