Method for producing wax for warm mix of asphalt from products synthesized by F-T

A synthetic product, F-T technology, applied in petroleum wax refining, petroleum industry, climate change adaptation and other directions, can solve the problems of reducing the mixing temperature of asphalt mixture, reducing the viscosity of asphalt at 60°C, and low production cycle of product yield, etc. The effect of low investment in equipment, low operating cost and simple production process

Active Publication Date: 2017-06-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Compared with the solvent separation process, the sweating separation process is an intermittent operation, and the product yield is lower and the production cycle is longer, but the sweating process has the advantages of less investment, simple production process, low operating cost, safe production process, energy saving and no environmental impact. Pollution and other advantages, some manufacturers are still using this method to produce soap wax products
[0020] Over the years, the sweating separation method has been developed in terms of production equipment and technology, such as CN89214332 (vertical square multi-section sweating tank), CN94223980.6 (dish-type sweating device), CN98233254.8 (paraffin sweating tank), CN200920033500 .X (new paraffin sweating tank), CN201210508905.0 (a high-efficiency paraffin sweating device), CN201320127680.4 (tubular paraffin deoiling device), etc., have made improvements in sweating production equipment; CN91206202 (a high-efficiency paraffin sweating device) tank) has made improvements in the sweat separation process, but these improvements still cannot produce wax products with a melting point above 70 °C
[0021] The existing asphalt warm mix agent usually reduces the 60°C viscosity of asphalt while reducing the mixing temperature of asphalt mixture, thus affecting the high temperature stability of asphalt mixture

Method used

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  • Method for producing wax for warm mix of asphalt from products synthesized by F-T

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment includes: (1) hydroconversion and (2) sweating.

[0052] (1) Hydroconversion

[0053]The wax oil product (normal paraffin content: 95.5wt%; drop melting point: 86.2°C; needle penetration (25°C) 55 (10 -1 mm)) as raw material, in the FHJ-2 catalyst (a Ni / Al 2 o 3 Commercial catalyst, developed and produced by Fushun Petrochemical Research Institute, the content of active metal nickel in terms of oxides is 40%, and the catalyst is subjected to conventional reduction treatment before use), under the action of reaction pressure 5.0MPa, reaction temperature 200°C, volume space velocity 1.0 h -1 Hydrogenation is carried out at a volume ratio of 500:1 to hydrogen to convert olefins and oxygenates therein.

[0054] Hydrogenation product properties: n-paraffin weight content 97.36%; drop melting point 85.0°C; needle penetration (25°C) 57 (10 -1 mm); Chromatography-mass spectrometry analysis, no alcohol, alkene, acid and other substances were detected.

[0...

Embodiment 2

[0073] This embodiment includes: (1) hydroconversion and (2) sweating.

[0074] (1) Hydroconversion

[0075] With embodiment 1.

[0076] (2) sweating

[0077] This part includes: (1) preparation work, (2) cooling down - constant temperature crystallization, (3) heating up - constant temperature sweating, (4) product refining and other processes.

[0078] (1) Preparation

[0079] Connect the jacket of the sweating dish and the movable coil to the circulation system, and fix the coil on the sweating dish; use the heat transfer oil as the medium; start the heating function of the circulation system to raise the temperature of the heat transfer oil to 90°C. Put water under the sweating dish plate.

[0080] Install the sealing system on the upper part of the sweating dish and connect it to the pressurized buffer tank and the compressor; install the decompression buffer tank on the lower part of the sweating dish and connect it to the vacuum pump; connect the pressurized buffer ...

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Abstract

The invention discloses a method for producing wax for warm mix of asphalt from products synthesized by F-T. The method comprises the following steps: products synthesized by F-T whose weight percentage of n-alkanes is 85% or above are used as raw materials, and hydro-conversion is carried out under the effects of a catalyst; sweating is carried out for hydrogenated products in order to produce the target product. The method is based on common sweating process, in a sweating process, air-flow passes through a wax layer for carrying liquid state components, separating effect of solid components and liquid components is enhanced and separating speed is accelerated; at the same time, gas generated by decomposition of inorganic salt forms micro spaces in the wax layer for facilitating rapid discharge of liquid components. The method has the advantages of low production equipment investment, simple production process, low operation cost, safety, energy saving without solvent pollution, and the like; products can reduce mixing temperature of the asphalt mixture, and at the same time rutting resistance of bituminous paving is improved.

Description

technical field [0001] The invention belongs to the technical field of special wax production, and in particular relates to a method for producing asphalt warm mixing wax with F-T synthetic products. Background technique [0002] The asphalt mixture used in road engineering is generally divided into three types according to the mixing construction temperature: hot mix asphalt mixture HMA (Hot Mix Asphalt), cold mix asphalt mixture CMA (Cold Mix Asphalt) and warm mix asphalt mixture WMA (Warm Mix Asphalt). [0003] Hot mix asphalt mixture is widely used and has good road performance. However, in the production process of hot mix asphalt mixture, asphalt and stone materials need to be mixed at a high temperature of 150-180°C, which not only consumes a lot of energy, but also During the production of hot mix asphalt mixture, a large amount of smoke and CO will be generated. 2 , CO, SO 2 , NO x Such harmful gases not only pollute the environment, but also affect the health o...

Claims

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Application Information

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IPC IPC(8): C10G73/44C10G73/42
CPCC10G73/42C10G73/44C10G2300/1022Y02A30/30
Inventor 孙剑锋陈保莲刘纾言孙国权孙鹏张志银
Owner CHINA PETROLEUM & CHEM CORP
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