# US 10,478,773 B2 · Device, process, and catalyst intended for desulfurization and demercaptanization of gaseous hydrocarbons

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- Number: US 10,478,773 B2
- Document ID: US10478773B2
- Status: Granted
- Kind: B2
- Application number: 16/243,498
- Filed: 2019-01-09
- Published: 2019-05-23
- Granted: 2019-11-19
- Earliest claimed: 2016-04-25
- Assignees: Start-Catalyst LLC
- Applicants: Start-Catalyst LLC
- Inventors: Liudmila Aleksandrovna Tyurina; Alexander Ivanovich Tyurin; Irina Gennadievna Tarkhanova; Alexey Aleksandrovich Tyurin
- Web page: https://patentgrep.com/patent/US10478773B2

## CPC

- B01D 53/52: Hydrogen sulfide
- B01D 53/26: Drying gases or vapours
- B01D 53/263: {by absorption}
- B01D 53/48: Sulfur compounds
- B01D 53/86: Catalytic processes
- B01D 53/8603: {Removing sulfur compounds}
- B01D 53/8612: {Hydrogen sulfide}
- B01J 23/72: Copper
- B01J 27/122: of copper
- B01J 31/00: Catalysts comprising hydrides, coordination complexes or organic compounds (catalyst compositions used only in polymerisation reactions C08 {; catalytic antibodies C12N9/0002})
- B01J 31/0202: {Alcohols or phenols}
- B01J 31/0237: {Amines}
- B01J 31/0244: {with nitrogen contained as ring member in aromatic compounds or moieties, e.g. pyridine}
- B01J 31/0247: {Imides, amides or imidates (R-C=NR(OR))}
- B01J 31/1805: {the ligands containing nitrogen}
- B01J 31/181: {Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine}
- C01B 17/05: by wet processes
- C10L 3/103: {Sulfur containing contaminants}
- B01D 53/96: Regeneration, reactivation or recycling of reactants
- B01D 2251/102: Oxygen
- B01D 2255/20738: Iron
- B01D 2255/20761: Copper
- B01D 2255/705: Ligands for metal-organic catalysts
- B01D 2256/24: Hydrocarbons
- B01D 2257/304: Hydrogen sulfide
- B01D 2257/306: Organic sulfur compounds, e.g. mercaptans
- B01J 2231/70: Oxidation reactions, e.g. epoxidation, (di)hydroxylation, dehydrogenation and analogues
- B01J 2531/16: Copper
- B01J 2531/842: Iron
- C10L 2290/141: of additive or catalyst
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- 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

## Abstract

The invention is related to the sphere technologies for desulfurization and demercaptanization of gaseous hydrocarbons. It can be used for purification of any gaseous hydrocarbon medium. The device includes a catalytic reactor loaded with a catalyst solution in an organic solvent, a means of withdrawal sulfur solution from the reactor into the sulfur-separating unit, and a sulfur-separating unit. The sulfur-separation unit includes a means of sulfur extraction. The reactor design and the catalyst composition provide conversion of at least 99.99% of hydrogen sulfide and mercaptans into sulfur and disulfides. The catalyst is composed of mixed-ligand complexes of transition metals. The technical result achieved by use of claimed invention is effectively a single-stage purification of gaseous hydrocarbons from hydrogen sulfide and mercaptans with remaining concentration of —SH down to 0.001 ppm while leaving no toxic waste.

## Claims

### Claim 1

A catalyst for desulfurization/demercaptanization of gaseous hydrocarbons, comprising:
a ferric chloride, a cupric chloride, or a mixture thereof, forming a first mixture,
a mixture of one or more amines and one or more amides including dimethylformamide (DMF), forming a second mixture,
wherein said first mixture and said second mixture are dissolved in one or more non-aqueous solvents, wherein the catalyst comprises 50 percent weight of the second mixture and 50 percent weight of the first mixture before being dissolved in the one or more non-aqueous solvents, said non-aqueous solvents comprising glycol or DMF.

### Claim 2

A catalyst for desulfurization/demercaptanization of gaseous hydrocarbons, comprising:
a ferric chloride, a cupric chloride, or a mixture thereof, forming a first mixture,
a mixture of one or more amines and one or more amides including dimethylformamide (DMF), forming a second mixture,
wherein said first mixture and said second mixture are dissolved in one or more non-aqueous solvents, wherein the catalyst comprises at most 50 percent weight of the second mixture and at least 50 percent weight of the first mixture before being dissolved in the non-aqueous solvent, said non-aqueous solvent comprising glycol and DMF.

### Claim 3

A catalyst for desulfurization/demercaptanization of gaseous hydrocarbons, comprising:
a ferric chloride, a cupric chloride, or a mixture thereof, forming a first mixture,
a mixture of one or more amines and one or more amides including dimethylformamide (DMF), forming a second mixture,
wherein said first mixture and said second mixture are dissolved in one or more non-aqueous solvents, wherein the catalyst comprises at most 50 percent weight of the second mixture and at least 50 percent weight of the first mixture before being dissolved in the non-aqueous solvent, said non-aqueous solvent comprising glycol and dimethylsulfoxide.