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Method for production of high-melting-point petroleum wax

A production method and technology of petroleum wax, which are applied in the refining of petroleum wax, etc., can solve the problems of reduced wax yield, slow filtration speed, clogging of filter cloth, etc., and achieve the effect of increasing the yield of deoiled wax and increasing the filtration speed.

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0006] When solvent deoiling, use the dewaxing wax paste of vacuum distillate oil with heavy fractions such as No. 500 neutral oil, No. 650 neutral oil, and No. 750 neutral oil as raw material to produce high melting point paraffin, or dewax bright oil. When wax paste is used as raw material to produce microcrystalline wax, the common disadvantages of conventional technology and the above two improved methods are slow filtration speed and serious filter cloth clogging, resulting in frequent warm washing of the filter machine, increased solvent consumption, and reduced wax yield.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The raw materials used in the embodiments of the present invention and comparative examples are No. 650 neutral oil dewaxing wax paste (A) and bright oil dewaxing wax paste (B). Its properties are shown in Table 1.

[0015] The embodiment of the present invention and comparative example hydrorefining adopt fixed bed one stage hydrorefining process, and hydrorefining catalyst is W-Ni / Al 2 o 3 Type paraffin hydrotreating catalyst. Catalyst properties are: WO 3 29.8wt%, NiO 4.3wt%, specific surface area 228m 2 / g, pore volume 0.46cm 3 / g. The hydrogenation process conditions and results are shown in Table 2. The melting point and oil content of the hydrogenation products in the examples and comparative examples remain unchanged, indicating that there is basically no cracking reaction, which ensures that the characteristic indicators of the petroleum wax are not destroyed.

[0016] The examples and comparative examples of the present invention adopt a one-stage solve...

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PUM

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Abstract

The invention relates to a method for production of high-melting-point petroleum wax. The method comprises the steps of: firstly making a deoiling raw material contact a petroleum wax hydrofining catalyst to undergo refining reaction under a hydrofining condition, subjecting the deoiling raw material undergoing hydrofining to deoiling by a solvent to produce deoiled wax. According to the method provided by the invention, the solvent used in the solvent deoiling process is a mixed solvent of tert-butyl-containing asymmetric ether and C3-C6 aliphatic ketone. Production of high-melting-point petroleum wax by the method provided by the invention can improve the filtration speed of solvent deoiling by 20%-35% and increase the yield of deoiled wax by 1%-3%.

Description

technical field [0001] The invention relates to a method for producing high-melting-point petroleum wax, in particular to producing high-melting-point petroleum wax by adopting the method of hydrofinishing raw materials for solvent deoiling and deoiling with methyl ethyl ketone / ethyl tert-butyl ether mixed solvent. The high melting point petroleum wax in the present invention includes paraffin wax and microcrystalline wax whose melting point is not less than 62°C. Background technique [0002] The deoiling of petroleum wax mainly includes sweat deoiling and solvent deoiling. The deoiling raw materials include cold-pressed dewaxing wax paste, solvent dewaxing wax paste or other petroleum fractions with high wax content. Sweating deoiling is only suitable for raw materials with lighter fractions, and cannot achieve continuous production, so it is rarely used in industry at present. The solvent deoiling method is suitable for raw materials of various fractions such as transfor...

Claims

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Application Information

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IPC IPC(8): C10G73/44
Inventor 王士新袁平飞王咏芳
Owner CHINA PETROLEUM & CHEM CORP
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