Method for reducing water content in hydrocarbon oil

A technology for hydrocarbon oil and reclaimed water is applied in the field of reducing the water content in hydrocarbon oil, which can solve the problems of high energy consumption and poor dehydration effect.

Active Publication Date: 2011-11-09
BEIJING ENERGY ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for reducing water content in hydrocarbon oil with good dehydration effect and low energy consumption in order to overcome the shortcomings of the prior art dehydration method for petroleum products or poor dehydration effect or high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This example is used to illustrate the method for reducing the water content in hydrocarbon oil provided by the present invention.

[0025] 2L of aviation kerosene (total acid value 0.008mgKOH / g, mercaptan sulfur content 8mg / kg, free water content 350mg / kg, water content 480mg / kg) after demercaptanization by Merox fixed bed process was mixed with nitric acid About 75mL of saturated aqueous solution of ammonium sodium chloride (obtained by mixing and dissolving 25 grams of sodium chloride, 15 grams of ammonium nitrate and 70 grams of deionized water, the volume ratio of saturated aqueous solution of sodium chloride containing ammonium nitrate to aviation kerosene is 5: 100) Naturally settle in a settling tank after contacting at 40°C for 15 minutes in a static mixer, separate the oil phase therein, measure the free water content to be 10mg / kg, and the water content to be 90mg / kg, cool to 10°C It was found to be still clear and transparent.

Embodiment 2

[0027] This example is used to illustrate the method for reducing the water content in hydrocarbon oil provided by the present invention.

[0028] 2L of aviation kerosene (total acid value 0.008mgKOH / g, mercaptan sulfur content 8mg / kg, free water content 350mg / kg, water content 480mg / kg) after demercaptanization by Merox fixed bed process was mixed with chlorine About 65 mL of saturated sodium chloride solution (obtained by mixing and dissolving 25 grams of sodium chloride and 63 grams of deionized water) and about 9 mL of saturated solution of ammonium nitrate (obtained by mixing and dissolving 15 grams of ammonium nitrate and 8 grams of water) were placed in a static mixer After contacting at 40°C for 10 minutes, it naturally settled in the settling tank. The volume ratio of the total amount of sodium chloride saturated aqueous solution and ammonium nitrate saturated solution to aviation kerosene was 3.75:100. The oil phase was separated and the free water content was measure...

Embodiment 3

[0030] This example is used to illustrate the method for reducing the water content in hydrocarbon oil provided by the present invention.

[0031] 3L of catalytic gasoline (mercaptan sulfur content 5mg / kg, free water content 150mg / kg, containing The amount of water is 320mg / kg, about 78mL with the saturated aqueous solution of calcium chloride and ammonium nitrate (obtained by mixing and dissolving calcium chloride, ammonium nitrate and deionized water at a weight ratio of 10:56:70, the saturated solution of sodium chloride and ammonium nitrate The volume ratio of the aqueous solution and the catalytic gasoline is 1.6: 100) in a static mixer at 35 ° C for 10 minutes, insulated and naturally settled in a settling tank, and the oil phase is separated out, and the free water content recorded is 10 mg / kg. The water content was 60mg / kg, and it was found to be still clear and transparent after cooling to 10°C.

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Abstract

The invention discloses a method for reducing water content in hydrocarbon oil, which comprises the following steps of: contacting the hydrocarbon oil with an aqueous solution of salt and performing oil-water separation on a product obtained through contact. In the method, the hydrocarbon oil is contacted with the aqueous solution of salt, and the product obtained through contact is subjected to oil-water separation, so that the aim of reducing the water content in the hydrocarbon oil is successfully fulfilled. The method has the advantages of high efficiency, wide application range, no special requirements on water content and mechanical impurities, simple operation and low cost, and is suitable for dehydrating the hydrocarbon oil of hydrocarbon refining, hydrocarbon cracking, catalytic cracking and atmospheric and vacuum distillation units. By the method, free water can be completely removed and at least partial dissolved water can be effectively removed from the hydrocarbon oil.

Description

technical field [0001] The invention relates to a method for refining hydrocarbon oil, in particular to a method for reducing the water content in hydrocarbon oil. Background technique [0002] During the production process of petroleum products, it is unavoidable to contact with water, resulting in water in the product. For example, liquid hydrocarbons are desulfurized by an agent and then washed with water, subjected to simple sedimentation or treated by a dehydration coalescer. Sometimes the free water is not separated cleanly, resulting in A small amount of lye is brought into the gas, and enters into C4 after fractionation, which affects the etherification catalyst; aviation coal often carries free water after desulfurization, and the dehydration performance of the coalescer is limited, causing part of the free water to enter the clay tower, affecting the refining life of the clay ; The sodium naphthenate produced during the alkali refining of straight-run diesel oil is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
Inventor 曲良龙曾健陈晓林
Owner BEIJING ENERGY ENG TECH
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