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Paraffin adsorption refining method

A technology of adsorption refining and paraffin wax, which is applied in the field of adsorbents and paraffin wax adsorption and refining, can solve the problems of difficult recovery of spent catalysts and treatment of solid waste, and achieve the effects of reducing refining costs, easy operation, and improving service life

Inactive Publication Date: 2005-04-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, some enterprises with large paraffin production volume mostly adopt hydrofining method. In addition, in most oil refining enterprises, there are also large-scale hydrofining units for petroleum products. The catalysts used in these hydrofining units have certain The resulting spent catalyst is a solid waste that is difficult to recycle and treat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Use a gas medium with 1% oxygen content to pass through the FV spent catalyst layer, gradually increase the temperature, and keep the temperature constant for 48 hours when the catalyst temperature reaches 450°C. Put the treated catalyst into a reactor with a diameter of 10mm and a length of 500mm, the bed height is 100mm, the adsorption temperature is 120°C, and the raw wax -1 The space velocity passes through the adsorbent, and the feeding time is 150 hours. The product wax contains 0.21m% oil, Saybolt colorimetry>No. 30, light stability No. 3, penetration 14, wax melting point 58.5, product yield 99.8m%.

Embodiment 2

[0021] Use a gas medium with an oxygen content of 5% to pass through the FV spent catalyst layer, gradually increase the temperature, and keep the temperature constant for 30 hours when the catalyst temperature reaches 500°C. Under the same reaction conditions as in Example 1, the adsorption temperature is 170°C, and the raw material wax space velocity is 2.0h -1 , the feeding time is 40 hours, the product wax contains 0.20m% of oil, Saybolt’s colorimetry>No. 30, light stability

Embodiment 3

[0023] Use a gas medium with an oxygen content of 10% to pass through the FV spent catalyst layer, gradually increase the temperature, and keep the temperature constant for 24 hours when the catalyst temperature reaches 550°C. Under the same conditions of reaction conditions and adsorption temperature conditions and embodiment 1, it is 4.0h to increase the space velocity -1 , feed time 20 hours, product wax oil 0.20m%, Saybolt colorimetry > 28, light stability No. 4, penetration 14, wax melting point 58.6, product yield 99.8m%.

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Abstract

The present invention discloses the paraffin adsorption refining method with waste hydrofining catalyst. The waste hdyrofining catalyst is first treated to form paraffin refining adsorbent. The refining process may be intermittent or continuous one with refining temperature of 90-200 deg.C and space velocity 0.1-5.0 / hr. The adsorbent may be regenerated. The said process may be used alone for refining paraffin, or cooperated with hydrofining process as the pre-treatment for hydrofining material paraffin resulting in prolonged service life of hydrogenation catalyst.

Description

1. Technical field [0001] The invention belongs to the technical field of paraffin wax refining, in particular the invention relates to a paraffin adsorption refining method and an adsorbent used in the method. 2. Background technology [0002] Paraffin wax production is based on the VGO fraction of paraffin-based crude oil as raw material, and the wax material with oil content and melting point meeting the index requirements is obtained through solvent dewaxing and deoiling. Too much will have adverse effects on the color and light stability of paraffin wax. Therefore, the wax needs to be further refined to remove non-ideal components to meet various needs. [0003] The methods currently used for paraffin refining include acid-base refining, adsorption refining and hydrogenation refining. Acid and alkali refining not only produces a large amount of acid residue and alkali residue, which pollutes the environment, but also has equipment corrosion problems, so this method is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G73/42
Inventor 张忠清苏重时王立言全辉蔡立林振发赵桂芳刘灏
Owner CHINA PETROLEUM & CHEM CORP
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