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A method of sweating and preparing wax for 3D printing

A 3D printing, wax layer technology, applied in petroleum wax refining, wax physical treatment, petrochemical modification, etc., can solve the problems of decreased product yield, unsuitable production of ordinary sweat separation process, and low production cycle of product yield.

Active Publication Date: 2019-06-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the ordinary sweating process produces soap wax and low melting point paraffin wax at 40°C to 60°C, the solid component (wax with a higher melting point) and the liquid component (wax with a lower melting point) in the sweating process are two types of components. They are in two phases of solid and liquid respectively, but it is difficult to completely separate them
In order to make the final product meet the requirements, the method of prolonging the sweating time (reducing the heating rate) and increasing the sweating termination temperature is usually adopted, but this will lead to a long production cycle and a decrease in product yield; tests have shown that the common sweating process produces products with a melting point above 70°C. For wax products, the carbon distribution width and n-alkane content on the wax in the later stage of sweating have nothing to do with the yield, that is, the carbon distribution width on the wax does not decrease with the decrease of yield, and the n-alkane content does not increase with the decrease of yield, so Ordinary sweat separation process is not suitable for the production of wax products with a melting point of about 70°C
[0019] Compared with solvent separation, the sweating separation process is intermittent operation, and the product yield is lower and the production cycle is longer, but the sweating separation 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 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 tank ) have made improvements in the sweating process, but these methods still cannot produce wax products with a melting point of about 70°C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] This embodiment includes: (1) hydrogenation, (2) distillation, (3) emulsification, (4) sweating, (5) blending, and silk extrusion.

[0070] (1) Hydrogenation

[0071] The wax oil product (n-paraffin content is 95.50wt%; penetration (55°C) > 200 (10 -1 mm). It can be seen from the needle penetration at 55°C that the raw material contains a large amount of low-melting point substances) as the raw material, in the FHJ-2 catalyst (a Ni / Al 2 o 3 Commercial catalyst, developed and produced by Fushun Petrochemical Research Institute, the active metal content is 40% based on oxides, and the catalyst is subjected to conventional reduction treatment before use), under the action of reaction pressure 5.0MPa, reaction temperature 200℃, volume space velocity 1.0h -1 Hydrogenation is carried out at a volume ratio of 500:1 to hydrogen to convert olefins and oxygenates therein.

[0072] The hydrogenation product has a weight content of n-alkanes of 97.36%. Chromatography-mass spec...

Embodiment 2

[0099] This embodiment includes: (1) hydrogenation, (2) distillation, (3) emulsification, (4) sweating, (5) blending, and silk extrusion.

[0100] (1) Hydrogenation

[0101] With embodiment 1.

[0102] (2) Distillation

[0103] With embodiment 1.

[0104] (3) Emulsification

[0105] This part includes (A1) oil phase material preparation, (A2) water phase material preparation, (A3) emulsion preparation three steps.

[0106] (A1) Oil phase material preparation

[0107] Take 69.0Kg of the fraction prepared in process (2), heat to 88°C and melt, add 2.3Kg diethylene glycol fatty acid ester, 1.0Kg tetraethylene glycol monostearate, 0.4Kg lauryl betaine and 3.5 Kg of pentadecanoic acid, stir well.

[0108] (A2) Water phase material preparation: prepare Na with a concentration of 3.2% 2 CO 3 Solution, take 23.8Kg and heat to 93°C.

[0109] (A3) Emulsion preparation: Stir the oil phase material prepared by the process (A1) at a speed of 300r / min, add the water phase material ...

Embodiment 3

[0117] This embodiment includes: (1) hydrogenation, (2) distillation, (3) emulsification, (4) sweating, (5) blending, and silk extrusion.

[0118] (1) Hydrogenation

[0119] With embodiment 1.

[0120] (2) Distillation

[0121] With embodiment 1.

[0122] (3) Emulsification

[0123] This part includes (A1) oil phase material preparation, (A2) water phase material preparation, (A3) emulsion preparation three steps.

[0124] (A1) Oil phase material preparation

[0125] Take 80.0Kg of the fraction prepared in process (2), heat to 85°C and melt, add 1.3Kg diethylene glycol fatty acid ester, 0.5Kg sorbitan monopalmitate, 0.4Kg polyoxyethylene fatty acid ester and 2.0Kg of linoleic acid, stir well.

[0126] (A2) Preparation of aqueous phase materials: prepare KHCO with a concentration of 4.5% 3 Solution, take 15.8Kg and heat to 89°C.

[0127] (A3) Emulsion preparation: Stir the oil phase material prepared by the process (A1) at a speed of 1000r / min, add the water phase materia...

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Abstract

The invention discloses a method for sweating and preparing wax for 3D printing. The method comprises the following steps: performing hydro-conversion on an F-T synthetic product; distilling a hydrogenation product to prepare a sweating raw material suitable for a distillation range; and emulsifying, sweating and blending, thereby obtaining the target product. According to the method disclosed by the invention, an oil-soluble emulsifier and oil-soluble acid are dissolved in the sweating raw material to serve as an oil phase material on the basis of an ordinary sweating process, an inorganic salt solution serves as an aqueous phase material and is sweated after emulsification, a tiny space is formed after bubbles and salt solution produced by reaction between the oil-soluble acid and the inorganic salt are discharged, and a channel for discharging liquid components is formed so as to promote rapid discharge of the liquid components. Meanwhile, the solid and liquid components are separated in a forced manner by enabling airflow to carry out the liquid components through a wax layer in the sweating process, so that a base material which has a melting point being about 70 DEG C and does not contain any low-melting-point component is prepared. The method disclosed by the invention has the advantages of low production equipment investment, simple production process, low operating cost, safety, energy saving, no solvent pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of special wax production, in particular to a method for sweating and preparing wax for 3D printing. Background technique [0002] Precision casting is a general term for precise casting processes obtained by precise molding methods, among which investment casting, also known as lost wax casting, is more commonly used. The products obtained by investment casting are precise and complex, close to the final shape of the parts, and can be used directly without or with little processing. It is an advanced technology near net shape and an excellent technology in the foundry industry. Its application very broad. However, the process of investment casting is complicated, mainly including processes such as wax pressing, wax repairing, tree formation, dipping, melting wax, casting molten metal, and post-processing. The wax molds are basically manufactured manually, which takes a long time. [0003] Rapid Prototypin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G73/42C10G73/40C10G73/38
CPCC10G73/38C10G73/40C10G73/42
Inventor 孙剑锋李景斌王立言张志银张造根赵威
Owner CHINA PETROLEUM & CHEM CORP
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