Method for improving petroleum wax smell and appearance

A petroleum wax and smell technology, which is applied in the refining of petroleum wax, etc., can solve the problems of unqualified petroleum wax smell, bulging of wax plate, color change and other problems.

Active Publication Date: 2016-10-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects that the petroleum wax products obtained by the petroleum wax refining process of the prior art still contain substances that affect the smell and appearance of the product and cause poor product quality, and provide a method that can effectively remove petroleum wax Trace solvents, moisture and other substances that affect the smell and appearance of the product, so as to effectively improve the smell, color and appearance of petroleum wax products, and produce petroleum wax that meets the requirements of the standard
[0008] The inventors of the present invention have found that the toluene solvent and other substances that affect the smell and taste contained in the petroleum wax products obtained by using the existing method for refining deoiled wax with white clay will not only cause the smell and taste of petroleum wax to be unqualified, color changes, and the product The moisture contained in the wax can also cause the problem of bulging of the wax board. Therefore, the inventor of the present invention can effectively remove the petroleum wax that affects the smell, taste and color by first refining the deoiled wax with white clay and then carrying out inert gas stripping. And the substances that produce wax board bulges, thus greatly improving the quality of petroleum wax products

Method used

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  • Method for improving petroleum wax smell and appearance
  • Method for improving petroleum wax smell and appearance
  • Method for improving petroleum wax smell and appearance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This example is used to illustrate the method for improving the smell and appearance of petroleum wax provided by the present invention.

[0054] The solvent dewaxing device uses the refined oil with the second-line solvent as the raw material for dewaxing and deoiling, and the deoiled wax enters the deoiled wax storage tank for storage (toluene solvent content in the deoiled wax is 126mg / kg).

[0055] Such as figure 1 As shown, after heat exchange between the deoiled wax from the deoiled wax storage tank and the deodorized and dehydrated petroleum wax product from the bottom of the inert gas stripping tower to 120°C, the deoiled wax is sent to the clay refining mixing tank and activated clay Mixing, the amount of activated clay added is 4% of the deoiled wax quality. The mixture of deoiled wax and clay coming out of the clay mixing tank enters the first-stage and second-stage plate-and-frame filters in turn to filter and remove clay. The white clay refined wax flowin...

Embodiment 2

[0057] This example is used to illustrate the method for improving the smell and appearance of petroleum wax provided by the present invention.

[0058] The solvent dewaxing device uses the fourth-line solvent-refined oil as the raw material for dewaxing and deoiling, and the deoiled wax enters the deoiled wax storage tank for storage (toluene solvent content in the deoiled wax is 83mg / kg).

[0059] After heat exchange between the deoiled wax from the deoiled wax storage tank and the deodorized and dehydrated petroleum wax product from the bottom of the inert gas stripping tower to 150°C, the deoiled wax is sent to the clay refining mixing tank to mix with activated clay, and the activity The amount of white clay added is 7% of the deoiled wax quality. The mixture of deoiled wax and clay coming out of the clay mixing tank enters the first-stage and second-stage plate-and-frame filters in turn to filter and remove clay. The white clay refined wax flowing out of the second-stag...

Embodiment 3

[0061] This example is used to illustrate the method for improving the smell and appearance of petroleum wax provided by the present invention.

[0062] The solvent dewaxing unit uses four-line hydrotreated waxy oil as raw material for dewaxing and deoiling, and the deoiled wax enters the deoiled wax storage tank for storage (the toluene solvent in the deoiled wax is 56 mg / kg).

[0063] After heat exchange between the deoiled wax from the deoiled wax storage tank and the deodorized and dehydrated petroleum wax product from the bottom of the inert gas stripping tower to 145°C, the deoiled wax is sent to the clay refining mixing tank to mix with activated clay, and the activity The amount of white clay added is 0.5% of the deoiled wax mass. The mixture of deoiled wax and clay coming out of the clay mixing tank enters the first-stage and second-stage plate-and-frame filters in turn to filter and remove clay. The white clay refined wax flowing out of the second-stage plate and fr...

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PUM

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Abstract

The invention discloses a method for improving petroleum wax smell and appearance. According to the method, deoiled wax obtained after a solvent recovery process of a solvent dewaxing device contacts clay; a mixture is separated, such that clay refined wax is obtained; through solvent dewaxing solvent recovery, the content of a toluene solvent in deoiled wax is no higher than 300mg/kg; the clay refined wax is subjected to inert gas stripping in a stripping tower, such that substances influencing the smell and appearance of the petroleum wax are removed, and a wax product meeting the petroleum wax standard requirement is obtained. After a period of time of storage, the petroleum wax obtained after clay refining and inert gas stripping is prevented from a bulge phenomenon.

Description

technical field [0001] The invention relates to a method for improving the smell and appearance of petroleum wax. Background technique [0002] Petroleum waxes include liquid paraffin, paraffin and microcrystalline waxes. Liquid paraffin is made from petroleum light hydrocarbons, which are generally obtained by dewaxing molecular sieves. Paraffin wax and microcrystalline wax are generally obtained by dewaxing and deoiling waxy raw materials in a solvent dewaxing device, and then deoiling the deoiled wax Sent to clay refining unit and / or hydrotreating unit for refining, and finally get petroleum wax product. [0003] Solvent dewaxing is an important process in the production process of traditional lubricating oil base oil. It is to mix the raw material oil with the dewaxing solvent, and then gradually cool it, and use the solvent to be insoluble or slightly soluble to the wax component at low temperature and soluble to the oil. , to crystallize the wax in the solution, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G73/42
Inventor 王玉章管翠诗丁洛
Owner CHINA PETROLEUM & CHEM CORP
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