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Process for preparing medical vaseline by hydrogenation with noble metal catalyst through two-stage method

A technology of precious metal catalysts and petrolatum, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, refined hydrocarbon oil, etc., and can solve problems such as increased equipment investment and operating costs, harsh reaction conditions, etc.

Pending Publication Date: 2021-05-18
河北飞天石化集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Process for preparing medical vaseline by hydrogenation with noble metal catalyst through two-stage method
  • Process for preparing medical vaseline by hydrogenation with noble metal catalyst through two-stage method
  • Process for preparing medical vaseline by hydrogenation with noble metal catalyst through two-stage method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The vaseline raw material heated to a certain temperature by the heating furnace 2 is mixed with hydrogen, and the mixture first enters the first-stage reactor. Under the pretreatment catalyst condition, the reaction temperature of the first-stage reactor is controlled to be 300°C, and the hydrogen partial pressure is 10MPa. The liquid hourly volume space velocity is 1.5h -1 , the volume ratio of hydrogen to oil is 500; the reaction product from the first-stage reactor is cooled by heat exchange, and then directly enters the second-stage reactor. Partial pressure is 10MPa, liquid hourly volume space velocity is 1 h -1 , the volume ratio of hydrogen to oil is 300; the reaction product from the second stage reactor is separated from gas and liquid, and the vaseline product is obtained after liquid phase stripping.

[0067] The pretreatment catalyst contains WO 3 22.5%, MoO 37.4%, NiO5.1%, the carrier is Al 2 o 3 ; The active component of the noble metal catalyst is P...

Embodiment 2

[0071] The vaseline raw material heated to a certain temperature by the heating furnace 2 is mixed with hydrogen, and the mixture first enters the first-stage reactor. Under the pretreatment catalyst condition, the reaction temperature of the first-stage reactor is controlled to be 250°C, and the hydrogen partial pressure is 15MPa. The liquid hourly volumetric space velocity is 0.1h -1 , the volume ratio of hydrogen to oil is 1500; the reaction product from the first-stage reactor is cooled by heat exchange, and then directly enters the second-stage reactor. Partial pressure is 16MPa, liquid hourly volume space velocity is 0.1h -1 , the volume ratio of hydrogen to oil is 1300; the reaction product from the second stage reactor is separated from gas and liquid, and the vaseline product is obtained after liquid phase stripping.

[0072] The pretreatment catalyst contains WO 3 22.5%, MoO 3 7.4%, NiO5.1%, the carrier is Al 2 o 3 -SiO 2 ; The active component of the noble met...

Embodiment 3

[0076] The vaseline raw material heated to a certain temperature by the heating furnace 2 is mixed with hydrogen, and the mixture first enters the first-stage reactor. Under the pretreatment catalyst condition, the reaction temperature of the first-stage reactor is controlled to be 400°C, and the hydrogen partial pressure is 5MPa. The liquid hourly volumetric space velocity is 0.1h -1 , the volume ratio of hydrogen to oil is 600; the reaction product from the first-stage reactor is cooled by heat exchange, and then directly enters the second-stage reactor. Partial pressure is 5MPa, liquid hourly volume space velocity is 1.5h -1 , the volume ratio of hydrogen to oil is 600; the reaction product from the second stage reactor is separated from gas and liquid, and the vaseline product is obtained after liquid phase stripping.

[0077] The pretreatment catalyst contains WO 3 22.5%, MoO 3 7.4%, NiO5.1%, the carrier is Al 2 o 3 ; The active component of the noble metal catalyst ...

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Abstract

The invention belongs to the technical field of chemical engineering, and provides a process for preparing medical vaseline through hydrogenation by adopting a noble metal catalyst by a two-stage method. The process comprises the following steps: mixing a vaseline raw material with hydrogen, entering a first-stage reactor, contacting with a hydrogenation pretreatment catalyst, carrying out desulfurization, denitrification, deoxidation, polycyclic aromatic hydrocarbon hydrogenation saturation and selective ring-opening reaction, performing gas-liquid separation and liquid-phase steam stripping on a reaction product of the first-stage reactor to obtain a vaseline semi-finished product raw material; and mixing the vaseline semi-finished product raw material with hydrogen, feeding the mixture into a second-stage reactor, contacting with a noble metal catalyst, carrying out deep saturation reaction of aromatic hydrocarbon and olefin, and carrying out gas-liquid separation, light hydrocarbon removal and odor removal on a reaction product of the second-stage reactor to obtain a vaseline product, wherein the noble metal catalyst contains 0.2%-5% by weight of Pt or Pd. According to the technical scheme, harmful substances such as sulfur, nitrogen and the like in raw materials are further removed by utilizing hydrogenation high-activity components of the catalyst, so that the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a process for preparing medical vaseline by hydrogenation with a precious metal catalyst in a two-stage method. Background technique [0002] Vaseline is an important raw material for the production of pharmaceuticals, daily chemicals, food and other fine chemical products. The production process of petroleum jelly is mainly composed of two parts: the blending of raw materials and the refining of raw materials. Since the raw materials of petroleum jelly contain more non-ideal components such as condensed ring aromatics and sulfur, nitrogen, and oxygen heterocyclic compounds, it must be refined in depth. remove. And because the vaseline used in medicine, food and cosmetics must be harmless to the human body. Therefore, hydrofining is a key step in the production of petrolatum. [0003] Vaseline adopts different refining processes according to different raw materials and ...

Claims

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Application Information

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IPC IPC(8): C10G45/10B01J23/63B01J23/44B01J23/42
CPCC10G45/10B01J23/63B01J23/42B01J23/44C10G2300/202C10G2300/1096
Inventor 李英超杨雷张云清刘浩
Owner 河北飞天石化集团有限公司
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