# US 4,398,919 A · Polyethoxylated compounds as coal-water slurry surfactants

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- Number: US 4,398,919 A
- Document ID: US4398919A
- Status: Granted
- Kind: A
- Application number: 06/318,283
- Filed: 1981-11-04
- Granted: 1983-08-16
- Earliest claimed: 1981-11-04
- Assignees: Akzona Incorporated
- Inventors: Moneeb Zakaria
- Web page: https://patentgrep.com/patent/US4398919A

## CPC

- C10L 1/326: {Coal-water suspensions}
- C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS

## Abstract

The present invention is directed to aqueous-comminuted coal slurries. Specifically, the invention is directed to slurries that include as surfactants about 0.1 to 0.5 weight percent surfactant compounds, as for example polyoxyethylene (2) oleamide, and which typically have a coal solids content of 70%.

## Claims

### Claim 1

A pumpable coal and water slurry, said slurry comprising comminuted coal, water, and a surfactant corresponding to the formula ##STR2## wherein R is an alkyl group having between 8 and 18 carbon atoms, x and y are each integers equal to or greater than 1, the sum of x and y is between 2 and 15, and wherein the active surfactant content of said slurry is from about 0.1 to 0.5 weight percent.

### Claim 2 (depends on 1)

The slurry as set forth in claim 1, wherein said slurry has a coal content of at least 70% by weight.

### Claim 3 (depends on 1)

The slurry as set forth in claim 1, wherein x and y are each equal to 1.

### Claim 4 (depends on 2)

The slurry as set forth in claim 2, wherein x and y are each equal to 1.

### Claim 5 (depends on 3)

The slurry as set forth in claim 3, wherein R is C.sub.18 H.sub.35 -.

### Claim 6 (depends on 4)

The slurry as set forth in claim 4, wherein R is C.sub.18 H.sub.35 -.

### Claim 7 (depends on 1)

The slurry as set forth in claim 1, wherein the sum of x and y is equal to 15.

### Claim 8 (depends on 2)

The slurry as set forth in claim 2, wherein the sum of x and y is equal to 15.

### Claim 9 (depends on 7)

The slurry as set forth in claim 7, wherein R is C.sub.18 H.sub.35 -.

### Claim 10 (depends on 8)

The slurry as set forth in claim 8, wherein R is C.sub.18 H.sub.35 -.