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Paraffin hydrofining process

A kind of hydrorefining and process technology, applied in petroleum wax refining, petroleum industry, molecular sieve catalyst, etc., can solve the problem of catalyst and hydrogenation conditions being difficult to apply

Inactive Publication Date: 2017-01-04
锡山区绿春塑料制品厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the existing paraffin hydrofining processes are all set for the previous high-quality clean oil
For the raw material wax produced from the current crude oil with high sulfur content, due to its high sulfur content, the catalysts and hydrogenation conditions used are difficult to apply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The catalyst was prepared by impregnation method, and the carrier was a mixture of MSU-G, SBA-15 and HMS, and the mixing ratio was 1:1.1:0.5. The active component molybdenum nitride MO 2 N, tungsten nitride W 2 N, molybdenum carbide Mo 2 The total content of C and tungsten carbide WC is 10% of the mass of the carrier, and their molar ratio is 1:0.4:0.3:0.8.

[0037] The catalyst is loaded into a fixed bed reactor, the reaction tube of the reactor is made of stainless steel with an inner diameter of 50mm, the catalyst bed is set to 3 layers, the temperature of the catalyst bed is measured by a UGU808 temperature control meter, and the raw material paraffin is made of The double-plunger micropump manufactured by Beijing Satellite Manufacturing Plant is continuously transported. The hydrogen is supplied by a high-pressure cylinder and the flow rate is controlled by a Beijing Qixing Huachuang D07-11A / ZM gas mass flow meter. The catalyst loading is 2kg. The reacted produc...

Embodiment 2

[0042] The catalyst is prepared by the impregnation method, and the carrier is a mixture of MSU-G / SBA-15 complex, MSU-G / HMS and SBA-15 / HMS complex, wherein the ratio of MSU-G, SBA-15 and HMS is the same as in the example 1 is the same. The active component molybdenum nitride MO 2 N, tungsten nitride W 2 N, molybdenum carbide Mo 2 The total content of C and tungsten carbide WC is 10% of the mass of the carrier, and the molar ratio is 1:0.6:0.45):1.2.

[0043] All the other conditions are the same as in Example 1.

[0044] The final product was tested and the total sulfur content was reduced to 2 ppm and the total basic nitrogen content was reduced to 7 ppm.

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PUM

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Abstract

The invention discloses a paraffin hydrofining process. In the process, a fixed bed reactor is adopted and is filled with a hydrogenation desulfurization and denitrification catalyst, the catalyst comprises a carrier and an active component, the carrier is a compound or mixture of MSU-G, SBA-15 and HMS, the active component is a mixture of dimolybdenum nitride MO2N, tungsten nitride W2N, molybdenum carbide Mo2C and tungsten carbide WC, and reaction conditions of the fixed bed reactor are as follows: reaction temperature is 250-300 DEG C, hydrogen partial pressure is 2.8-3.6 MPa, hydrogen-paraffin volume ratio is 150-300, and volume space velocity is 0.6-2.0 h<-1>. By the process, the total sulfur content of paraffin can be controlled to be lower than 5 ppm, and meanwhile, the total nitrogen content in the paraffin is controlled to be within 10 ppm.

Description

technical field [0001] The invention relates to a process for refining paraffin hydrodesulfurization, in particular to a process for refining paraffin hydrodesulfurization by using a specific catalyst. Background technique [0002] Paraffin wax is a kind of petroleum processing products. It is obtained from lubricating oil fractions obtained by distillation of crude oil through solvent refining, solvent dewaxing or wax freeze crystallization, pressing dewaxing to obtain wax paste, and then solvent deoiling and refining. shape or needle crystal. [0003] Paraffin wax is divided into food wax, fully refined paraffin wax, semi-refined paraffin wax, crude wax, match wax and black wax. Paraffin wax is sold in many grades, the main difference being the different melting points. Depending on the application, the quality requirements for paraffin wax are different. Since the crude wax from petroleum contains many impurities such as sulfur, it cannot be used directly as a product....

Claims

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Application Information

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IPC IPC(8): C10G73/44B01J29/00
CPCC10G73/44B01J29/005B01J29/0341B01J29/045C10G2300/1085C10G2300/201
Inventor 朱忠良
Owner 锡山区绿春塑料制品厂
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