Hydrogenation process of producing food-level white oil

A food-grade, hydrogenation technology, applied in hydrotreating process, edible oil/fat, petroleum industry, etc., can solve the problems of high investment and operating costs, complex process flow, affecting economic benefits, etc., to achieve equipment investment and Low operating cost, simple and safe operation, and the effect of reducing product pour point

Active Publication Date: 2007-04-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
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Problems solved by technology

There are deficiencies such as complex technological process, high investment and operating costs, and impact on economic benefits
CN1289643A adopts hydrogenation treatment-hydrofining-isomerization dewaxing-hydrogenation supplementary refining to produce food-grade white oil, each reaction section adopts the same reaction pressure, the pressure level is higher, and there are the same shortcomings as above

Method used

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Embodiment Construction

[0013] The method for producing food-grade white oil of the present invention adopts a two-stage method of low-pressure hydrogenation isomerization-high-pressure hydrogenation supplementary refining, including the following steps: After the raw material oil and hydrogen are mixed, they first enter the hydrogenation isomerization reactor, and after the hydrogenation and hydrogenation The isomerization reaction is carried out in the presence of the isomerization catalyst, the reaction product enters the gas-liquid separator, and the liquid phase enters the fractionation tower, and the fraction above 320°C is cut. The distillate above 320°C is mixed with hydrogen and then enters the supplementary hydrofining reactor for hydrofining reaction in the presence of hydrogen and hydrogenation catalyst, and the reaction product is separated into gas-liquid and distilled into food-grade white oil products of different specifications.

[0014] Since the unstable components and aromatics in ...

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Abstract

The invention disclosed a second-stage hydrogenating way to produce vash oil of food class. It adopts the two-stage method of low pressure hydrogenation and refined hydrogenation. The material is first put in the low pressure hydrogenating reactor to lower the pour point. After separating the isomerism substances, put the distillate which is higher than 320 Deg C into the hydrogenation reactor to saturize the aromatic hydrocarbon to satisfy the index of vash oil of food class. The invention has many advantages such as strong material adaptability, modem operating conditions, low investment and operating cost and high quality of the products. The vash oil can be used in medicine industry, cosmetics industry and food industry.

Description

technical field [0001] The invention relates to a method for producing food-grade white oil by hydrogenation, in particular to a method for producing food-grade white oil by hydrogenation in two stages. Background technique [0002] White oil is a highly refined colorless, odorless, transparent oily liquid with excellent chemical stability and light stability. Widely used in cosmetics, food, medicine, plastics, chemical fiber, machinery and light industry and other industries. Therefore, white oil must meet strict specification requirements. Food-grade white oil must meet the standard requirements of being colorless, odorless, and passing the detection of easy carbon and ultraviolet absorption spectroscopy through deep refining methods. [0003] CN1352233A discloses a method for producing white oil. Under the operating pressure of 4.0-10.0MPa, hydrotreated oil is used as raw material, and a series process of hydrofinishing-isomeric dewaxing-hydrogenation supplementary refin...

Claims

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Application Information

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IPC IPC(8): C10G65/04A23D9/02
Inventor 姚春雷刘平方向晨廖世刚全辉林振发
Owner CHINA PETROLEUM & CHEM CORP
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