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A kind of preparation method of microcrystalline wax

A technology of microcrystalline wax and wax layer, which is applied in petroleum wax refining, petroleum wax recycling and other directions to achieve the effect of accelerating separation speed, enhancing separation effect and simple production process

Active Publication Date: 2017-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention has the advantages of low device investment, simple production process, low operating cost, and no solvent pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment includes two parts: A: sweating in the first stage; and B: sweating in the second stage.

[0046] A: The first stage of sweating

[0047] This process includes: (A 1) preparation, (A 2) charging, (A 3) cooling - crystallization at constant temperature, (A 4) heating - sweating at constant temperature, (A 5) collection of intermediate products, (A 6) intermediate products Refining and other processes.

[0048] (A 1) Preparations:

[0049] Connect the sealing system on the upper part of the sweating dish with the buffer tank and the compressor.

[0050] The lower part of the sweating dish plate is cushioned with water.

[0051] The sweating dish with a jacket is connected with a movable coil and a circulation system with program cooling / heating function, using water as the medium; start the heating function of the circulation system to raise the temperature of the circulating water to 70°C.

[0052] (A 2) Loading:

[0053] Daqing crude oil residue wax...

Embodiment 2

[0096] This embodiment includes two parts: A: sweating in the first stage, and B: sweating in the second stage.

[0097] A: The first stage of sweating

[0098] This process includes: (A 1) preparation work, (A 2) charging, (A 3) cooling - constant temperature crystallization, (A 4) heating - constant temperature sweating, (A 5) intermediate product collection and metal particle recovery, (A 6) Intermediate product refining and other processes.

[0099] (A 1) Preparations:

[0100] Sieve out 20 mesh to 40 mesh lead particles and zinc particles, and mix them evenly at a weight ratio of 1:1.

[0101] Connect the sealing system on the upper part of the sweating dish with the buffer tank and the compressor.

[0102] The lower part of the sweating dish is covered with water; the bottom of the sweating dish is covered with double layers of medium-speed filter paper.

[0103] The sweating dish with a jacket is connected with a movable coil and a circulation system with program cool...

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PUM

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Abstract

The invention discloses a preparation method of microcrystalline wax. The method adopts a sweating device, and after the cooling and crystallization process is completed, the surface of the wax layer is uniformly covered with metal particles, and during the heating and sweating process, the airflow is forced to pass through the wax layer to carry out the liquid oil. On the basis of the ordinary sweating method, the present invention adds a forced separation process, accelerates the separation speed of wax and oil, and enhances the separation effect of wax and oil, so that the solvent-free deoiling method of sweating and deoiling can produce microcrystalline wax products. The method of the invention has the advantages of low device investment, simple production process, low operating cost, no solvent pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of petroleum wax production, in particular to a preparation method of microcrystalline wax. Background technique [0002] Petroleum wax is a general term for various wax products obtained from waxy distillates after crude oil is refined and processed, including liquid paraffin, paraffin and microcrystalline wax. Microcrystalline wax is produced by deasphalting the vacuum residue oil with propane and other solvents, and then going through the steps of dewaxing, deoiling, refining and molding. It is generally produced by C 30 ~C 60 Composed of naphthenes, a small amount of normal and isoparaffins. Generally, the melting point of microcrystalline wax is 65°C to 90°C, and it has a finer needle-like crystal structure than paraffin wax in solid state. [0003] Dewaxing is a process in which lubricating oil fractions are used as raw materials to prepare wax paste with an oil content of about 10-30%. The dewaxing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G73/36C10G73/42
Inventor 王旭孙剑锋王士新张志银姚春雷赵威
Owner CHINA PETROLEUM & CHEM CORP