# US 2014/0193324 A1 · Micronized sulphur powder and method of production of same

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- Number: US 2014/0193324 A1
- Document ID: US20140193324A1
- Status: Published application
- Kind: A1
- Application number: 14/175,629
- Filed: 2014-02-07
- Published: 2014-07-10
- Earliest claimed: 2011-10-11
- Assignees: Sulvaris Inc.
- Applicants: Sulvaris Inc.
- Inventors: Satish IYER
- Web page: https://patentgrep.com/patent/US20140193324A1

## CPC

- C01B 17/10: Finely divided sulfur, e.g. sublimed sulfur, flowers of sulfur
- C01B 17/0216: {Solidification or cooling of liquid sulfur}
- C10L 1/04: essentially based on blends of hydrocarbons
- C01P 2004/61: Micrometer sized, i.e. from 1-100 micrometer
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- 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
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

A process is provided for the production of a micronized sulphur powder product as well as a micronized sulphur cake intermediate. Production of the micronized sulphur powder using this process, which comprises preparation of a micronized sulphur emulsion from molten sulphur and a dispersant solution, from which the dispersant solution is subsequently removed, produces a product superior quality, and the method of production itself has enhanced safety and economic attributes.

## Claims

### Claim 1

A method for the production of micronized sulphur particles, the method comprising:
(a) producing an emulsion of liquid sulphur in an aqueous dispersant solution above a melting point of sulphur;
(b) cooling the sulphur emulsion to a temperature below the melting point of sulphur to solidify sulphur particles; and
(c) separating the dispersant solution from the sulphur particles to leave a sulphur particle cake, wherein the dispersant aids the separation of water from the sulphur particles.

### Claim 2 (depends on 1)

The method of claim 1 wherein the dispersant agent comprises a Naphthalene Sulfonate compound, Carboxy Methyl Cellulose, or a surfactant, or combinations thereof,

### Claim 3 (depends on 1)

The method of claim 1 wherein the dispersant is present at between 1 and 100 parts per thousand volume of the dispersant solution.

### Claim 4 (depends on 1)

The method of claim 1 wherein the dispersant comprises a napthalene sulfonate compound and is present at 0.5% to 1.5% by weight.

### Claim 5 (depends on 1)

The method of claim 1 wherein the dispersant solution is filtered or centrifuged from the emulsified sulphur suspension to leave the sulphur particle cake.

### Claim 6 (depends on 5)

The method of claim 5 wherein the dispersant solution is removed by a filter press.

### Claim 7 (depends on 6)

The method of claim 6 wherein the filter press uses a combination of mechanical pressure and air pressure to accelerate filtration.

### Claim 8 (depends on 1)

The method of claim 1 wherein the separated dispersant solution is recycled back to step (a).

### Claim 9 (depends on 1)

The method of claim 1 wherein the average sulphur particle size is less than about 100 microns.

### Claim 10 (depends on 7)

The method of claim 7, wherein the average sulphur particle size is less than about 30 microns.

### Claim 11 (depends on 1)

The method of claim 1 wherein the sulphur particle cake has a moisture content of between about 7% and about 12% by weight after separation.

### Claim 12 (depends on 10)

The method of claim 10 comprising the further steps of drying the sulphur particles, and mixing the sulphur particles with ingredients to form dispersible micronized sulphur pellets.

### Claim 13 (depends on 12)

The method of claim 12 wherein the dried sulphur particles comprise residual dispersant.

### Claim 14

A micronized sulphur powder product which is a dispersible sulphur pellet comprising sulphur particles, where 95% of the particles are less than about 100 microns in size.

### Claim 15 (depends on 14)

The micronized sulphur product of claim 14, wherein 95% of the particles are less than about 30 microns in size.