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Method for in-depth hydrogenation and dearomatization of vaseline

A technology of deep hydrogenation and vaseline, which is applied in the fields of hydrogenation treatment process, hydrocarbon oil treatment, petroleum industry, etc., can solve the problems of harsh reaction conditions, equipment investment and operation cost increase, and achieve improved impurity resistance and raw material adaptability The effect of enhancing and reducing equipment investment and operating costs

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

With the increasingly stringent requirements on the aromatics content of petroleum jelly products worldwide, the hydrofining of petroleum jelly requires more stringent reaction conditions, resulting in a significant increase in equipment investment and operating costs

Method used

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Embodiment Construction

[0016] The main content of the method of the present invention is to use two-stage medium-pressure hydrogenation technology to produce vaseline. First, the raw material enters the first reactor under conditions suitable for reactions such as desulfurization and denitrogenation, and the first reactor uses a sulfided hydrogenation refining catalyst. , mainly for desulfurization, denitrogenation, deoxygenation and partial aromatic saturation reactions; the product of the first reactor undergoes gas-liquid separation, and the liquid phase and hydrogen gas that is basically free of hydrogen sulfide enter the second reactor, and the second reactor uses precious metal Pt or Refined catalyst of Pd, under the conditions suitable for aromatic hydrocarbon saturation and other reactions. The reaction product of the second reactor undergoes gas-liquid separation, light hydrocarbon removal and deodorization to obtain vaseline product.

[0017] The effects of the present invention are specif...

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Abstract

The invention relates to a method for in-depth hydrogenation and dearomatization of vaseline. According to the method, a vaseline raw material and hydrogen enter into a first reactor at first and contact with a sulfided non-noble metal hydrorefining catalyst for desulphurization, denitrification, deoxidation and partial aromatic saturation; then a reaction product of the first reactor undergoes gas-liquid separation in a high pressure separator, and an obtained liquid phase and fresh hydrogen enter into a second reactor which employs a noble metal catalyst for aromatic saturation; a reaction product of the second reactor undergoes gas-liquid separation, an obtained liquid phase is subjected to removal of light hydrocarbon and odor so as to obtain a vaseline product, and an obtained gas phase enters into the first reactor and is used as supplementary hydrogen for the first reactor; and hydrogen partial pressure of the first reactor and the second reactor is 5 to 10 MPa. With the method provided by the invention, the high-quality vaseline product can be obtained at a low reaction pressure, and equipment investment and operation cost are reduced.

Description

technical field [0001] The invention relates to a production method of petrolatum, in particular to a method for producing petrolatum with low aromatic content by adopting a two-stage hydrogenation method of a non-precious metal catalyst and a precious metal catalyst. The vaseline produced according to the method can be used in food, medicine and cosmetics. Background technique [0002] The production process of petroleum jelly is mainly composed of two parts: the blending of raw materials and the refining of blends. Since the raw materials of petroleum jelly contain more non-ideal components such as condensed ring aromatics and sulfur, nitrogen, and oxygen heterocyclic compounds, they must be refined in depth Remove it. Vaseline used in food, medicine and cosmetics must be harmless to the human body. Therefore, refining and deep de-aromatization are the key steps to produce high-quality petroleum jelly. [0003] The production of petrolatum by hydrogenation is an effecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G73/44C10G67/02
Inventor 王士新袁平飞李殿昭
Owner CHINA PETROLEUM & CHEM CORP
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