A Particle-Based Wax Perspiration Method

A technology of granules and plastic granules, which is applied in the recovery of petroleum wax, etc., can solve the problems of low enthalpy of phase change wax, low product yield, narrow melting range, etc., and achieve improved fluidity, high yield, and narrow melting range Effect

Active Publication Date: 2021-05-25
上海焦耳蜡业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-efficiency sweating method based on particles to solve the problems of uneven heat transfer, low product yield, high oil content, low enthalpy of phase change wax and narrow melting range mentioned in the background technology question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 0.5 kg of petroleum wax paste with a melting point of 65°C and an oil content of 7% and heat it to melt, control the heating temperature at 78°C, then add 1 cm of acrylic particles, stir evenly, put it into a sweating dish, and control the cooling rate at 1.9°C / h. When the oil-containing wax is slowly cooled to 50°C, the paraffin wax of the sweating raw material crystallizes out as thick fibrous crystals, and the oil in the oil-containing wax and a part of the low-melting paraffin wax dissolved in the oil gradually ooze out from the crystalline raw wax paste. When the oil-containing wax was slowly reheated (heating rate 0.5° C. / hour), after the oil flowed out, the wax with a low melting point was gradually separated from the oil-containing wax. After the heating is over, the remaining high-melting point paraffin products are melted with steam, and the melted high-melting point paraffin products flow into the intermediate tank; finally, steam is used to purge the swe...

Embodiment 2

[0035] Take 1 kg of petroleum wax paste with a melting point of 51°C and an oil content of 12% and heat it to melt, control the heating temperature at 65°C, then add 6mm of polyethylene wax micropowder, stir well and put it into a sweating dish, and control the cooling rate to 4.0°C / hour , when the oil-containing wax is slowly cooled to 36 ° C, the paraffin wax of the sweating raw material crystallizes out in the form of thick fibrous crystals, and the oil in the oil-containing wax and a part of the low-melting point paraffin dissolved in the oil gradually ooze out from the crystalline raw wax paste . When the oil-containing wax is slowly reheated (heating rate 0-2° C. / hour), after the oil flows out, the wax with a low melting point is gradually separated from the oil-containing wax. Finally, a 57°C phase-change wax was obtained, with an oil content of 0.5%, an enthalpy of 210kJ / kg, and a paraffin wax yield of 18%.

Embodiment 3

[0037] Take 1 kg of petroleum wax paste with a melting point of 55°C and an oil content of 11% and heat it to melt, control the heating temperature at 75°C, then add 27 microns of polypropylene wax micropowder, stir it evenly, put it into a sweating dish, and control the cooling rate at 1.0°C / Hours, when the oily wax was slowly cooled to 41°C, the paraffin wax of the sweating raw material crystallized out as thick fibrous crystals, and the oil in the oily wax and a part of the low melting point paraffin dissolved in the oil gradually infiltrated from the crystallized raw material wax paste. out. When the oil-containing wax was slowly reheated (temperature increase rate 1°C / hour), after the oil flowed out, the wax with a low melting point was gradually separated from the oil-containing wax. Finally, a 63°C phase-change wax was obtained, with an oil content of 0.25%, an enthalpy of 213kJ / kg, and a paraffin wax yield of 19%.

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Abstract

A particle-based wax sweating method, comprising the following steps: 1) padding the bottom of a sweating device with water, 2) heating the raw wax to a liquid state, adding sweating particles, and then adding it to the sweating device; Cool down to 10-20°C below the melting point at a rate of h; 4) Drain the pad water, send the warm water pump to the sweating tank, heat at a rate of 0.5-2°C / h and collect sweating paraffins with different melting points; 5) Wait until the end of heating After waxing, the melted high melting point paraffin product flows into the intermediate tank; 6) use steam to purge the remaining sweat particles and the last fraction of the sweat tank, and then filter and separate the two to recover the sweat particles. The method of the invention reduces the compaction density of the perspiration raw material, is conducive to the outflow of oil and low-melting wax, improves the fluidity of the perspiration liquid, and doubles the separation effect; at the same time, the perspiration product has a relatively high yield and a melting range. Relatively narrow, the molecular weight of the wax product is concentrated, and the product enthalpy value is relatively high.

Description

technical field [0001] The invention belongs to the technical field of paraffin wax deoiling, and in particular relates to a particle-based wax sweating method. Background technique [0002] Wax is a complex mixture of wax molecules of different molecular weights with different melting points. Therefore, the method of wax sweating can separate small molecules from macromolecular waxes. For example, the separation of paraffin waxes with different melting points, the separation of Fischer-Tropsch waxes, and the separation of various special waxes can all be physically separated by sweating. Therefore, various waxes with different molecular weights and waxes with different melting points are prepared. These waxes can be widely used in plastics, rubber, papermaking, casting, fiberboard, agriculture and other fields. [0003] The oily wax and wax paste formed in the petroleum dewaxing process contain a large amount of oil and low melting point components, usually 10%-30% (weig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G73/36
Inventor 张建雨
Owner 上海焦耳蜡业有限公司
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