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Microcrystalline wax hydrogenation method

A technology of microcrystalline wax and high-pressure hydrogenation, which is applied in the refining of petroleum wax, can solve problems that are difficult to meet at the same time, and achieve the effects of low cost, simple and flexible operation, and high yield

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this patent is that due to the use of sulfurized catalysts, it is difficult to simultaneously satisfy desulfurization, nitrogen reaction and aromatic hydrocarbon saturation reaction under optimal conditions, such as the hydrogenation saturation effect of aromatic hydrocarbons (the UV absorbance value of condensed ring aromatic hydrocarbons reacted in the product) Need to further improve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The microcrystalline wax raw material containing 2.21w% oil is used, the properties are shown in Table 1, and the properties of the catalyst are shown in Table 2.

[0013] The mixture of microcrystalline wax and hydrogen heated to a certain temperature enters the reactor, and under the action of the catalyst, by controlling the appropriate reaction conditions, hydrodesulfurization, denitrogenation, deoxygenation and aromatic hydrocarbon saturation reactions are carried out; after the material flows out of the reactor, it passes through After gas-liquid separation and vacuum deodorization, it is a white microcrystalline wax product. The reduction condition of the catalyst is hydrogen reduction at 3.5 MPa and 320° C. for 20 hours. The process conditions and product properties are shown in Tables 3 and 4, and the products in Table 4 meet the standard requirements of food-grade microcrystalline wax.

Embodiment 2

[0015] The raw material used in this embodiment is an oil-containing 2.68% microcrystalline wax raw material (referring to Table 1), and the catalyst is the same as in Example 1. The reduction condition of the catalyst is to reduce with hydrogen for 25 hours at 5.5MPa and 300°C. The process conditions and product properties are shown in Tables 3 and 4, respectively.

Embodiment 3

[0017] The raw material used in this implementation is microcrystalline wax raw material containing 3.05% oil (referring to Table 1), and the catalyzer is the same as embodiment 1, and the reduction condition of the catalyzer is to use hydrogen to reduce 28 hours under 4.5MPa and 280 ℃ of conditions. The process conditions and product quality are shown in Table 3 and 4, respectively.

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PUM

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Abstract

The invention discloses a microcrystalline wax hydrogenation method. In the method, microcrystalline wax is used as a raw material, a reduction catalyst is used, microcrystalline wax is produced by a single-stage high-pressure hydrogenation technique, and the reactions for removing sulfur, nitrogen, oxygen and saturation of aromatic hydrocarbons are accomplished in a reactor; and the pressure of a catalyst bed layer is 9 to 16MPa, the temperature is 240 to 310 DEG C, the volume space velocity is 0.1 to 0.5h<-1>, and the hydrogen to oil volume ratio is (400-1,000):1. The method disclosed by the invention has the advantages of short flow process, simple and flexible operation, high yield, low cost, environment friendliness and the like, and can obtain white microcrystalline wax product for food and cosmetics.

Description

technical field [0001] The invention describes a production method of white microcrystalline wax, especially a method for producing white microcrystalline wax by adopting a one-stage hydrogenation process. Background technique [0002] Microcrystalline wax is a petroleum product separated from slag reduction, and is an important raw material in the pharmaceutical and chemical industries. Coarse microcrystalline wax contains impurities such as sulfur, nitrogen, oxygen, and non-ideal components such as aromatic hydrocarbons, which cannot meet the quality requirements. Hydrogenation is a common method to produce high-quality microcrystalline wax. The process includes one-stage hydrogenation process, one-stage series hydrogenation process and two-stage hydrogenation process. One-stage hydrogenation processes using a sulfur-resistant catalyst generally do not yield high-quality grades of microcrystalline wax products. The one-stage series hydrogenation process uses two reactors...

Claims

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Application Information

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IPC IPC(8): C10G73/44
Inventor 李殿昭袁平飞王士新姚春雷刘平李景斌张造根
Owner CHINA PETROLEUM & CHEM CORP
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