Method for directly producing paraffin or micro crystal wax

A microcrystalline wax, direct technology, applied in the recovery/refining of mineral wax, petroleum industry, etc., can solve the problem of high oil content in wax paste, achieve the effect of improving the crystal structure and improving the effect of oil and wax separation

Active Publication Date: 2005-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this method, the oil content of the wax paste is still very high after a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The raw material oil is deasphalted oil after furfural is refined, and the properties of the raw material are shown in Table 1. The dewaxing solvent is a mixed solvent of butanone and toluene (volume ratio 50:50), and a process of one-stage dewaxing and multi-point dilution is adopted, and the total dilution ratio is 4.5:1.

[0016] The specific process is briefly described as follows: first heat the raw material oil to 80°C, and then add 1500ppm dewaxing aid to the hot raw material oil, (a mixture of polyα-olefin and ethylene, propylene copolymer, polyα-olefin monomer carbon The atomic number distribution is: C10α-olefin accounts for 10%, C14α-olefin accounts for 20%, C16α-olefin accounts for 20%, C18α-olefin accounts for 25%, C20~38α-olefin accounts for 25%, and the molecular weight distribution is 3000~2500000; Ethylene , The molecular weight distribution of propylene copolymer is 500~100000, and the weight ratio of the former and the latter is 2: 2), add each diluti...

Embodiment 2

[0031]The vacuum three-line distillate oil refined by furfural is used as raw material, and the properties of the raw material are shown in Table 1. The dewaxing solvent is a mixed solvent of butanone and toluene (volume ratio 65:35), and a process of one-stage dewaxing and multi-point dilution is adopted. The total dilution ratio 3.7: 1, the experimental process is basically the same as in Example 1. The dewaxing aid is a mixture of poly-α-olefin and ethylene and propylene copolymer (the carbon number distribution of poly-α-olefin monomer is: C10-15α-olefin accounts for 45%, C15-20α-olefin accounts for 40%, C20- 30α-olefin accounts for 15%, and the molecular weight distribution is 3,000-2,500,000; the molecular weight distribution of ethylene and propylene copolymer is 600-100,000, and the weight ratio of the former to the latter is 4:1. The test results are shown in Table 4. As can be seen from the data in Table 4, the oil content of the oily wax paste is only 0.6%, which me...

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Abstract

During direct production of paraffin or microcrystal wax, wax-containing material oil, dewaxing solvent and dewaxing assistant are mixed, and the mixture is cooled to -5 deg.c to -30 deg.c and separated to obtain wax product and dewaxed oil. The dewaxing assistant is ashless polymer mixture of high branched chain degree polymer and low branched chain degree polymer, the high branched chain degree polymer is polymethacrylate or polyolefin, and the low branched chain degree polymer is polyethylene or ethylene-propylene copolymer. The method improves the crystal structure of wax and raises oil-wax separating effect, and the oil-containing cerate obtained through the dewaxing process reaches the requirement of paraffin or microcrystal wax in oil content, and may be used in producing paraffin or microcrystal wax through refining.

Description

technical field [0001] The invention belongs to a hydrocarbon oil solvent dewaxing method. More specifically, the present invention is a process for solvent dewaxing of hydrocarbon oils using filter aids. Background technique [0002] Paraffin wax and microcrystalline wax are widely used in industrial and agricultural production, and are produced industrially by combined solvent dewaxing and deoiling equipment. The process is briefly described as follows: add diluting solvent to the lubricating oil raw material in stages to reduce the viscosity of the raw oil, while stirring, cooling and crystallizing to the required dewaxing temperature, and the mixed slurry of oil, wax and solvent in the drum filter Filter and separate to obtain filtrate and oily wax paste. After the filtrate is recovered, dewaxed oil is obtained. The oil-containing wax paste is continuously diluted with a solvent, and the temperature is gradually increased, and it is filtered an...

Claims

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Application Information

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IPC IPC(8): C10G73/22
Inventor 丁洛杨文中王玉章曹谊华
Owner CHINA PETROLEUM & CHEM CORP
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