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Preparation method of hydrocarbon oil type descaling agent, prepared hydrocarbon oil type descaling agent and application

A descaling agent, hydrocarbon oil technology, applied in chemical instruments and methods, detergent compositions, non-surface active detergent compositions, etc. clean interface

Active Publication Date: 2017-05-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The technical problem solved by the present invention is to provide a preparation method of a hydrocarbon oil type descaling agent, the prepared hydrocarbon oil type descaling agent and its application, to solve the problem of conventional three lines, minus one line, minus two lines and minus three lines, The carry oil produced in the furfural solvent refining process of fractions such as minus four lines, the furfural content exceeds the standard, and it is impossible to use conventional distillation, back extraction and other means to reduce its content to less than 500ppm.

Method used

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  • Preparation method of hydrocarbon oil type descaling agent, prepared hydrocarbon oil type descaling agent and application
  • Preparation method of hydrocarbon oil type descaling agent, prepared hydrocarbon oil type descaling agent and application
  • Preparation method of hydrocarbon oil type descaling agent, prepared hydrocarbon oil type descaling agent and application

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Experimental program
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preparation example Construction

[0032] The invention provides a method for preparing a hydrocarbon oil-type descaling agent, which uses furfural plant oil as a raw material and comprises the following steps:

[0033] Step 1: the first extraction: use hydroxylammonium hydrochloride solution as the extractant, the volume ratio of the extractant to the carrier oil is 0.15-0.5:1, and extract at room temperature; and

[0034] Step 2: the second extraction: the raffinate obtained in step 1 after extraction and sedimentation separation is subjected to a second extraction, and alcohol ammonia solvent is used as an extraction agent for the second extraction, and the volume of the extraction agent and the carried oil is The ratio is 0.15-0.5:1, the extraction is carried out at room temperature, and the raffinate obtained by sedimentation and separation after extraction is the hydrocarbon oil-type descaling agent.

[0035] Wherein, the normal pressure distillation range of the carried oil component is 150-302°C, and th...

Embodiment 1

[0069] Take 200ml of the carrier oil 1, place it in a three-neck ground flask with a built-in magnetic stirrer, and add 75ml of the first extraction solvent: a 2wt% aqueous solution of hydroxylammonium hydrochloride. Install a bulb condenser. Ensure that tap water is low-level water inlet and high-level water outlet when running through the jacket of the spherical condenser tube.

[0070] Stir the 275ml liquid in the ground three-neck flask with a magnetic force, the stirring rate is about 120-150r / min, at room temperature, stir for 25min, settle for 30min, then transfer the mixture into the separatory funnel and continue to settle for 25-35min , separate the aqueous phase of lower floor, obtain the raffinate (containing a small amount of solvent of the first section) of the first section extraction, the furfural content of the first section raffinate is 453ppm.

[0071] The raffinate of this first section is used as raw material, is placed in identical three-necked flask equ...

Embodiment 2

[0073] According to the test device and test procedure of Example 1, 200ml of carry oil 1 is processed successively, wherein the solvent of the first section of extraction: the aqueous solution of hydroxylammonium hydrochloride with a concentration of 4wt%, the addition is 50ml, its stirring intensity, stirring time, separation and sedimentation Mode and separation and sedimentation time are exactly the same as the first section of the extraction process described in Example 1. Then the raffinate (furfural content is 375ppm) that the first section extraction is separated, according to the second section extraction process that embodiment 1 describes, add the second section extraction solvent that is equivalent to the volume 40% of the first section raffinate -alcoholic ammonia solvent (ammonia content 2wt%, ethanol content 45v%, the water of balance), its extraction process and test condition are identical with embodiment 1. The raffinate obtained in the second stage of extrac...

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Abstract

The invention aims to provide a hydrocarbon oil type scale remover preparation method, a hydrocarbon oil type scale remover and application thereof.The method includes the steps of primary extraction and secondary extraction, wherein during primary extraction, an extraction agent, namely a hydroxy lamine hydrochloride solution, and carried oil in a volume ratio of 0.15-0.5 to 1 are subjected to extraction at room temperature; during secondary extraction, raffinate obtained by settling separation after primary extraction and an extraction agent, namely an ammonia alcohol solvent are subjected to extraction at room temperature, and settling separation is conducted after extraction so as to obtain raffinate, namely the hydrocarbon oil type scale remover, wherein a volume ratio of the extraction agent to the carried oil is 0.15-0.5 to 1.By the two-stage solvent refining method, content of carried oil furfural can be decreased to 50-150 ppm, ammonia content is below 0.2-0.4wt%, and the problems that the carried oil of a furfural device is pungent in smell and poisonous and harmful to environments of workplaces and cannot be produced and sold as a conventional lubricant product and the like are solved.

Description

technical field [0001] The invention relates to a preparation method of a hydrocarbon oil type descaling agent, which is used for cleaning the inner wall of a pipeline / container. Background technique [0002] Since crude oil is used as raw material for petrochemical production, its main components are hydrocarbons (98w%), and a small amount of nitrogen, sulfur, oxygen and other compounds. Products such as gasoline, kerosene, diesel oil, lubricating oil, paraffin and asphalt are produced through atmospheric and vacuum distillation . During these production processes, equipment and pipelines will inevitably generate and accumulate various types of oil scale. Literature (petrochemical equipment oil scale coke scale chemical cleaning technology analysis chemical cleaning volume 16 the first phase in February 2000 P21-P27) is divided into several kinds such as light oil scale, heavy oil scale, glue grease scale and tar scale. Among them, the glue grease refers to the polymer bo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/04C11D7/24C11D7/40
Inventor 吕贞杨新华李春娣教震李静
Owner PETROCHINA CO LTD