A low carbon number light color sulfur-free chlorine-free ash-free polymerization inhibitor and its application

Abstract

The invention relates to a medium material required in petrochemical production process, more specifically, the invention relates to a light-colored, sulfur-free, chlorine-free and ash-free polymerization inhibitor with low carbon number and application thereof. According to the practice of distillation and separation of gasoline and diesel mixed oil (hereinafter referred to as light mixed oil), a light-colored low-carbon number, sulfur-free, chlorine-free, ash-free polymerization inhibitor is compounded, and the low-carbon number, light-colored, sulfur-free The safety performance evaluation of the use of chlorine-free and ash-free polymerization inhibitors provides technical support for the long-term safe operation of distillation equipment, and is suitable for distillation and separation of light mixed oils under normal pressure and ≤ 250 °C; this patent is derived by adding diphenylamine substances, p-phenylenediamine derivatives, hydrocarbyl succinimide and carbon nine aromatic hydrocarbons, which can prevent the olefins in the oil from the olefins in the oil, oxygen and various oil additives during the distillation process, as well as during the separation process from the distillation Condensation and coking of iron ions and manganese ions produced by equipment corrosion and / or segregated by additives to reduce scaling and coking substances.

Description

technical field

[0001] The invention relates to a medium material required in a petrochemical production process, more particularly, the invention relates to a low-carbon number, light-colored, sulfur-free, chlorine-free, ash-free polymerization inhibitor and its application. Background technique

[0002] Pipeline transportation technology has been widely used in the long-distance transportation of gasoline and diesel products for automobiles at home and abroad, but there are not many reports on the mixed oil treatment technology in pipeline transportation technology. There are five main methods: direct back-mixing method; distillation separation method; Metal oxide treatment method; alkali treatment method; filtration method. Among them, the distillation separation method is the most used and the most effective. However, in the distillation separation method, the olefins in the oil are easily condensed and fouled with the olefins in the oil, various additives, and iron ion...

Examples

preparation example Construction

[0058] The present invention does not specifically limit the preparation method of the polymerization inhibitor, which can be prepared by a mixing method.

[0059] The second aspect of the present invention provides an application of the above-mentioned low-carbon number, light-colored, sulfur-free, chlorine-free, and ashless polymerization inhibitor for the high-temperature distillation and separation process of light mixed oil.

[0060] The light mixed oil of the present invention is a mixture of gasoline and diesel. The high-temperature distillation of the present invention is the distillation and separation of light mixed oil under the condition of normal pressure and ≤250°C.

Embodiment 1

[0064] This example provides a polymerization inhibitor. The preparation raw materials of the polymerization inhibitor include, in parts by weight, 15 parts of diphenylamine derivatives, 30 parts of p-phenylenediamine derivatives, 15 parts of succinimide and 30 parts of carbon Nine aromatic hydrocarbons; the diphenylamine derivative is 4-hydroxydiphenylamine, and the succinimide is N-methylsuccinimide;

[0065] The structural formula of the p-phenylenediamine derivative is shown in formula (1):

[0066]

[0067] R 1 , R 2 Both are sec-butyl groups.

[0068] The N-methylsuccinimide was purchased from Nanjing Kangmanlin Chemical Industry Co., Ltd.

[0069] This example also provides the above-mentioned preparation method of the polymerization inhibitor, which includes the following steps: mixing the preparation raw materials of the polymerization inhibitor to obtain the polymerization inhibitor.

Embodiment 2

[0071] This example provides a polymerization inhibitor. The preparation raw materials of the polymerization inhibitor include, in parts by weight, 25 parts of diphenylamine derivatives, 40 parts of p-phenylenediamine derivatives, 20 parts of succinimide and 35 parts of carbon Nine aromatic hydrocarbons; the diphenylamine derivative is 4-hydroxydiphenylamine, and the succinimide is N-ethylsuccinimide;

[0072] The structural formula of the p-phenylenediamine derivative is shown in formula (1):

[0073]

[0074] R 1 , R 2 Both are sec-butyl groups.

[0075] The N-ethylsuccinimide was purchased from Nanjing Kangmanlin Chemical Industry Co., Ltd.

[0076] This example also provides the above-mentioned preparation method of the polymerization inhibitor, which includes the following steps: mixing the preparation raw materials of the polymerization inhibitor to obtain the polymerization inhibitor.

technical field

[0001] The invention relates to a medium material required in a petrochemical production process, more particularly, the invention relates to a low-carbon number, light-colored, sulfur-free, chlorine-free, ash-free polymerization inhibitor and its application. Background technique

[0002] Pipeline transportation technology has been widely used in the long-distance transportation of gasoline and diesel products for automobiles at home and abroad, but there are not many reports on the mixed oil treatment technology in pipeline transportation technology. There are five main methods: direct back-mixing method; distillation separation method; Metal oxide treatment method; alkali treatment method; filtration method. Among them, the distillation separation method is the most used and the most effective. However, in the distillation separation method, the olefins in the oil are easily condensed and fouled with the olefins in the oil, various additives, and iron ion...

Examples

preparation example Construction

[0058] The present invention does not specifically limit the preparation method of the polymerization inhibitor, which can be prepared by a mixing method.

[0059] The second aspect of the present invention provides an application of the above-mentioned low-carbon number, light-colored, sulfur-free, chlorine-free, and ashless polymerization inhibitor for the high-temperature distillation and separation process of light mixed oil.

[0060] The light mixed oil of the present invention is a mixture of gasoline and diesel. The high-temperature distillation of the present invention is the distillation and separation of light mixed oil under the condition of normal pressure and ≤250°C.

Embodiment 1

[0064] This example provides a polymerization inhibitor. The preparation raw materials of the polymerization inhibitor include, in parts by weight, 15 parts of diphenylamine derivatives, 30 parts of p-phenylenediamine derivatives, 15 parts of succinimide and 30 parts of carbon Nine aromatic hydrocarbons; the diphenylamine derivative is 4-hydroxydiphenylamine, and the succinimide is N-methylsuccinimide;

[0065] The structural formula of the p-phenylenediamine derivative is shown in formula (1):

[0066]

[0067] R 1 , R 2 Both are sec-butyl groups.

[0068] The N-methylsuccinimide was purchased from Nanjing Kangmanlin Chemical Industry Co., Ltd.

[0069] This example also provides the above-mentioned preparation method of the polymerization inhibitor, which includes the following steps: mixing the preparation raw materials of the polymerization inhibitor to obtain the polymerization inhibitor.

Embodiment 2

[0071] This example provides a polymerization inhibitor. The preparation raw materials of the polymerization inhibitor include, in parts by weight, 25 parts of diphenylamine derivatives, 40 parts of p-phenylenediamine derivatives, 20 parts of succinimide and 35 parts of carbon Nine aromatic hydrocarbons; the diphenylamine derivative is 4-hydroxydiphenylamine, and the succinimide is N-ethylsuccinimide;

[0072] The structural formula of the p-phenylenediamine derivative is shown in formula (1):

[0073]

[0074] R 1 , R 2 Both are sec-butyl groups.

[0075] The N-ethylsuccinimide was purchased from Nanjing Kangmanlin Chemical Industry Co., Ltd.

[0076] This example also provides the above-mentioned preparation method of the polymerization inhibitor, which includes the following steps: mixing the preparation raw materials of the polymerization inhibitor to obtain the polymerization inhibitor.

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