Scale and corrosion inhibitor used for hydrogenation device and synthesis method thereof

A technology of scale and corrosion inhibitors and hydrogenation devices, which is applied in the fields of treatment equipment corrosion/scaling inhibition, petroleum industry, hydrocarbon oil treatment, etc. It can solve the problems of easy pollution of the environment, poisonous scale and corrosion inhibitors, etc., and achieves a synthetic route Simple, corrosion-inhibiting, cheap and readily available raw materials

CN101654628AInactive Publication Date: 2010-02-24罗将
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-02-24
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a scale and corrosion inhibitor used for a hydrogenation device and a synthesis method thereof. The scale and corrosion inhibitor is characterized by comprising the following components in percentage by weight: A, 25 to 40 percent of film-forming amine compound; B, 10 to 20 percent of neutral amine mixture; C, 10 to 15 percent of dispersion component; and D, 10 to 40 percent of compound solvent. The synthesis method comprises the following steps: firstly, adding A and D, heating the mixture for 30 minutes under the condition of stirring, then adding the rest componentsinto the mixture respectively, and stirring the mixture for 2 hours to form the scale and corrosion inhibitor. When the adding amount of the scale and corrosion inhibitor is 5 to 15ppm of medium flow, the generation of corrosion and salt scale can be effectively inhibited; and the full water-soluble formulation of the scale and corrosion inhibitor is directly discharged along with washing, and has no adverse effect on subsequent oils.
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Description

technical field

[0001] The invention belongs to the field of chemical additives and relates to a corrosion inhibitor, in particular to a scale and corrosion inhibitor used in a hydrogenation unit and a synthesis method thereof. Scale and corrosion inhibitors for preventing high-pressure air coolers of hydrogenation units and downstream pipelines from scaling caused by ammonia salts, under-scaling corrosion caused by scaling, and chemical corrosion caused by other corrosive media. Background technique

[0002] Oil hydrogenation technology is an important means of refining and upgrading petroleum products and cracking and processing heavy oil. Its notable features are high temperature, high pressure, and hydrogen. Since the purpose of its process is to remove S, N, Cl, O and other non-ideal component elements in hydrocarbons, it is accompanied by H 2 S, HCl, NH 4 Cl, NH 4 For the formation of compounds such as HS, there are relatively serious H in the high pressure part of ...

Examples

Embodiment 1

[0031] Weigh 40 grams of polyoxyethylene-based monoamine compound, 20 grams of deionized purified water and 20 grams of ethanol, add them to the stirrer, wait until the temperature rises to 80 ° C, maintain this temperature for 30 minutes under the condition of stirring, and then weigh them respectively Take 10 grams of polyethylene polyamine and 10 grams of tetraethylene triamine, add them into the stirrer, keep the temperature at 80° C., and maintain this temperature for 2 hours while stirring. Naturally cooled to room temperature, the scale and corrosion inhibitor can be obtained.

Embodiment 2

[0033] Weigh 30 grams of polyoxyethylene-amine compound, 20 grams of deionized purified water and 20 grams of ethanol, add them to the stirrer, wait until the temperature rises to 80 ° C, maintain this temperature for 30 minutes while stirring, and then weigh them respectively Take 15 grams of polyethylene polyamine and 15 grams of tetraethylene triamine, add them in the stirrer, keep the temperature at 80° C., and maintain this temperature for 2 hours while stirring. Naturally cooled to room temperature, the scale and corrosion inhibitor can be obtained.

Embodiment 3

[0035] Weigh 35 grams of polyoxyethylene diamine compound, 15 grams of deionized purified water and 20 grams of ethanol, add them to the stirrer, wait until the temperature rises to 80 ° C, maintain this temperature for 30 minutes while stirring, and then weigh them respectively Get 18 grams of polyethylene polyamine and 12 grams of tetraethylene triamine, add in the stirrer, keep constant temperature 80 ℃, maintain this temperature under the situation of stirring for 2 hours. Naturally cooled to room temperature, the scale and corrosion inhibitor can be obtained.

[0036] By analyzing the iron ion analysis corrosion rate of the follow-up sulfur-containing sewage, it is found that the average iron ion before injection is 5-6ppm, after adding the corrosion inhibitor of the present invention, the iron ion is controlled at about 1ppm, and the basic corrosion inhibition rate is 80-90 %.

[0037] After testing, the wax oil hydrotreating unit of a refinery was forced to shut down t...