# US 10,767,116 B2 · Method and composition for neutralizing acidic components in petroleum refining units

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- Number: US 10,767,116 B2
- Document ID: US10767116B2
- Status: Granted
- Kind: B2
- Application number: 15/759,971
- Filed: 2016-09-26
- Published: 2018-09-06
- Granted: 2020-09-08
- Earliest claimed: 2015-09-29
- Assignees: Dow Global Technologies LLC
- Applicants: Dow Global Technologies LLC
- Inventors: Runyu Tan; Lorenzo Spagnulo
- Web page: https://patentgrep.com/patent/US10767116B2

## CPC

- C10G 7/10: Inhibiting corrosion during distillation
- C10G 19/02: with aqueous alkaline solutions
- C10G 70/00: Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00
- C10G 75/02: by addition of corrosion inhibitors
- C10G 2300/4075: Limiting deterioration of equipment
- C10G 2300/80: Additives
- 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

A method of inhibiting corrosion and fouling in petroleum refining units which comprises adding choline hydroxide either alone or in combination with a hydrogen-bond donor such as a carboxylic acid, an amine, an amide, or an alcohol.

## Claims

### Claim 1

A process for neutralizing acidic components in a distillation overhead system of a refining unit comprising water condensate and petroleum products, the process comprising:
adding to the distillation overhead system a neutralizing amount of a neutralizing composition comprising an aqueous solution of choline hydroxide and an hydrogen-bond donor, the hydrogen bond donor being glycerol, the distillation overhead system including an overhead line off of a distillation column and the neutralizing composition being added in the overhead line.

### Claim 2 (depends on 1)

The process of claim 1 wherein the choline hydroxide and the hydrogen bond donor are mixed together prior to being added.

### Claim 3 (depends on 1)

The process of claim 1 wherein the solution of choline hydroxide and the hydrogen bond donor are added to the system separately.

### Claim 4 (depends on 1)

The process of claim 1 further comprising the step of adding one or more alkylamine or alkanolamine.

### Claim 5 (depends on 4)

The process of claim 4 wherein the alkylamine or alkanolamine is dimethylethanolamine (DMEA), dimethylisopropanolamine (DMIPA), ethylenediamine (EDA), methoxypropylamine (MOPA), monoethanolamine (MEA), dimethylaminopropylamine (DMAPA), morpholine, or trimethylamine (TMA).

### Claim 6 (depends on 1)

The process of claim 1 wherein the amount of the neutralizing composition ranges from 1 to 10,000 ppm based on the petroleum products.

### Claim 7 (depends on 1)

The process of claim 1 further comprising the step of adding the neutralizing composition to the system at a rate sufficient to maintain the pH of water condensate in the system at a pH of equal to or greater than 4.0.