# US 9,752,084 B2 · Block copolymers, synthesis and application as dehydrating and desalting of heavy crudes

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- Number: US 9,752,084 B2
- Document ID: US9752084B2
- Status: Granted
- Kind: B2
- Application number: 14/189,309
- Filed: 2014-02-25
- Published: 2014-08-28
- Granted: 2017-09-05
- Earliest claimed: 2013-02-26
- Assignees: Instituto Mexicano Del Petroleo
- Applicants: Instituto Mexicano Del Petroleo
- Inventors: Eugenio Alejandro Flores Oropeza; Cesar Andres Flores Sandoval; Reyna Reyes Martinez; Jose Gonzalo Hernandez Cortez; Alfonso Lopez Ortega; Laura Veronica Castro Sotelo; Fernando Alvarez Ramirez; Arquimedes Estrada Martinez; Flavio Salvador Vazquez Moreno
- Web page: https://patentgrep.com/patent/US9752084B2

## CPC

- C08L 71/08: Polyethers derived from hydroxy compounds or from their metallic derivatives (C08L71/02 takes precedence)
- C07D 215/10: Quaternary compounds
- C10G 31/08: by treating with water
- C10G 33/04: with chemical means
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES

## Abstract

The present invention is related to formulations consisting by block copolymers α,ω-di-aryl or alkyl sulfonates of poly(ethylene oxide)w-poly(propylene oxide)-poly(ethylene oxide)w of bis-ammonium and block copolymers α,ω-di-amine of poly(ethylene oxide)w-poly(propylene oxide)-poly(ethylene oxide)w, that are effective in the dewatering and desalting crude whose specific gravities are within the range of 14 to 23° API.

## Claims

### Claim 1

A method of dewatering and desalting crude oil, comprising:
mixing a dewatering and desalting agent and a crude oil having a specific gravity of about 14 to 23° API at a concentration of at least 100 ppm, wherein said dewatering and desalting agent comprises at least one compound selected from the group consisting of Formula 1 and Formula 5;
where R is
and R represents a copolymer with a molecular weight in the range from 1000 to 4000 Daltons,
w and v are independently a whole number consistent with the molecular weight,
R1, R2 and R3 radicals are independently selected from the group consisting of —CH2(CH2)AB; —CEGJ; —CH2CHLM; —CH2(CH2)QM;
where A is a number between 1 and 9, B is H,
E, G and J are a radical independently selected from the group consisting of:—H, methyl, ethyl, n-propyl, iso-propyl, sec-butyl, iso-butyl, tert-butyl, n-butyl, phenyl, cyclohexyl, and cyclopentyl,
L is a radical represented by methyl or ethyl, and M is a hydroxyl group,
O is a number between 1 and 5, T is represented by groups E, G and J, NO2, Cl, F and Br; and
Z is a radical independently selected from the group consisting of methanesulfonate, benzenesulfonate and para-toluenesulfonate.

### Claim 2 (depends on 1)

The method of claim 1, wherein
said copolymer is a mixture in a solvent having a boiling point of about 35° C. to about 200° C., said method comprising adding said mixture to the crude oil.

### Claim 3 (depends on 2)

The method of claim 2, wherein
said solvent is selected from the group consisting of dichloromethane, chloroform, benzene, toluene, xylene, turbosine, naphtha and mixtures thereof, and where said mixture is added in an amount of 0.01% to 5% by weight.

### Claim 4 (depends on 1)

The method of claim 1, wherein
said dewatering and desalting agent comprises a mixture of two of said copolymers in a ratio of about 1:1 to said crude oil.

### Claim 5 (depends on 1)

The method of claim 1, wherein
said dewatering and desalting agent comprises a mixture of a copolymer of Formula 1 and at least one copolymer of Formula 5.