阅读说明：本技术 一种加水压榨脱蜡生产石蜡的方法 (Method for producing paraffin by adding water, squeezing and dewaxing ) 是由 吴俊岭 张硕鹏 张建雨 于 2021-07-27 设计创作，主要内容包括：本发明提供一种加水压榨脱蜡生产石蜡的方法,将原料蜡加热熔融成原料蜡油,然后加入水进行慢慢降温,同时快速搅拌,随着原料的不断降温,所述原料蜡油和水的混合物粘度逐渐增加,直至得到类似乳状的均匀粘稠混合物,将所述粘稠混合物放入滤袋进行压榨脱油得到蜡膏,将蜡膏蒸馏脱除水得到石蜡。由于在压榨原料中添加了溶剂水,所以经过与原料快速混合冷却,所以形成了水原料乳状混合物,因此大大降低了原料的粘度,所以压榨效率大大提高,压榨产品蜡膏含油大大降低,提高了蜡膏产品质量。(The invention provides a method for producing paraffin by adding water, which comprises the steps of heating and melting raw material wax into raw material wax oil, then adding water for slowly cooling, simultaneously quickly stirring, gradually increasing the viscosity of a mixture of the raw material wax oil and the water along with the continuous cooling of the raw material until a milky uniform viscous mixture is obtained, putting the viscous mixture into a filter bag for squeezing and deoiling to obtain cerate, and distilling and deoiling the cerate to obtain the paraffin. As the solvent water is added into the pressing raw material, the pressing raw material and the raw material are quickly mixed and cooled to form a water raw material emulsion mixture, so that the viscosity of the raw material is greatly reduced, the pressing efficiency is greatly improved, the oil content of the pressed product cerate is greatly reduced, and the quality of the cerate product is improved.)

1. A method for producing paraffin by adding water to squeeze and dewax is characterized by comprising the steps of heating and melting raw material wax, then adding water to slowly cool, simultaneously stirring quickly, gradually increasing the viscosity of a mixture of the raw material wax oil and the water along with the continuous cooling of the raw material until a uniform viscous mixture similar to a milky state is obtained, putting the viscous mixture into a filter bag to squeeze and deoil to obtain cerate, and distilling the cerate to remove the water to obtain the paraffin.

2. The method of claim 1, comprising: the raw material wax is reduced second-line distillate oil, reduced third-line distillate oil and reduced fourth-line distillate oil.

3. The method of claim 1, comprising: heating the raw material wax to 60-150 ℃.

4. The method of claim 1, comprising: adding water, and stirring to obtain a uniform milky mixture, wherein the temperature of the milky mixture is 30-50 ℃.

5. The method of claim 1, comprising: the raw material wax and water are in a part ratio of 1-7: 9 to 3.

Technical Field

The invention belongs to the technical field of petrochemical industry, and particularly relates to a method for producing paraffin by adding water, squeezing and dewaxing.

Background

In general, the compression dewaxing process is to freeze the compression raw material to a desired temperature in a dewaxing crystallization device and then to press and filter the compression raw material by a filter press, so that the crystalline paraffin wax is separated from the cold dewaxed oil. Squeezing and filtering to obtain two products of cerate and filtrate, namely dewaxed oil, wherein the cerate contains 60-80% of paraffin generally. Therefore, the cerate needs to be further deoiled to obtain an industrial paraffin raw material with the oil content less than 1.5 percent, and then the industrial paraffin is obtained after refining. The conventional squeezing dewaxing process has the advantages of low investment, simple process and low cost. However, the conventional squeezing dewaxing has many defects, and after raw materials are frozen in the squeezing process, the viscosity of the raw materials is high when the temperature of the raw materials is low, so that the filtering efficiency is low, and the oil content of dewaxed product cerate is as high as 20-40%.

Disclosure of Invention

In view of the above circumstances, the present invention aims to provide a method for producing paraffin wax by adding water to squeeze and dewax, which is characterized in that the method comprises heating and melting raw wax to obtain raw wax oil, then adding water to slowly cool down while rapidly stirring, gradually increasing the viscosity of the mixture of the raw wax oil and the water with the continuous cooling of the raw material until obtaining a milky uniform viscous mixture, placing the viscous mixture into a filter bag to squeeze and deoil to obtain cerate, and distilling and deoiling the cerate to obtain paraffin wax.

The invention has the beneficial effects that:

as the solvent water is added into the pressing raw material, the pressing raw material and the raw material are quickly mixed and cooled to form a water raw material emulsion mixture, so that the viscosity of the raw material is greatly reduced, the pressing efficiency is greatly improved, the oil content of the pressed product cerate is greatly reduced, and the quality of the cerate product is improved.

Furthermore, the raw material wax oil is reduced second-line distillate oil, reduced third-line distillate oil and reduced fourth-line distillate oil.

Further, the raw material wax is heated to 60 ℃ to 150 ℃.

Further, the temperature of the uniform milky mixture obtained by adding water and stirring is 10-50 ℃.

Further, the ratio of the raw material wax to the water in parts is 1-7: 9 to 3.

Detailed description of the preferred embodiments

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

Comparative example:

heating the second-line distillate to 60 deg.C, slowly cooling at 10 deg.C/hr, adding the pasty mixture into a filter bag when the raw material is cooled to pasty temperature of 20 deg.C, and quickly placing the filter bag into an automatic squeezing machine. The press button is actuated to begin the automatic pressing of the mixture. The pressing pressure was 10 tons. Continuously collecting the dewaxed oil which automatically flows out during squeezing. After pressing for 30 minutes, a press stop button is actuated to stop pressing. Taking out and squeezing the filter cake cerate. The melting point of the cerate is tested to be 42 ℃, and the oil content is tested to be 35%.

Example 1:

heating 70 kg of the second-line distillate oil to 60 ℃, then slowly adding 30 kg of water at 60 ℃, then slowly cooling at a cooling speed of 10 ℃/h, gradually increasing the viscosity of the raw material along with the continuous cooling of the raw material to finally obtain a uniform viscous milky viscous mixture, putting the viscous milky viscous mixture into a filter bag, and then quickly putting the filter bag into an automatic squeezer. The press button is actuated to begin the automatic pressing of the mixture. The pressing pressure was 10 tons. Continuously collecting the dewaxed oil which automatically flows out during squeezing. After pressing for 30 minutes, a press stop button is actuated to stop pressing. Taking out and squeezing the filter cake cerate. The melting point of the cerate is tested to be 45 ℃, and the oil content is tested to be 26%.

Example 2:

60 kilograms of second-line distillate oil is heated to 60 ℃, then 60 ℃ and 40 kilograms of water are slowly added, and then the mixture is slowly cooled at the cooling speed of 10 ℃/h, the viscosity of the mixture is gradually increased along with the continuous cooling of the raw material, finally, a uniform viscous and milky viscous mixture is obtained, the viscous and milky viscous mixture is put into a filter bag, and then the filter bag is quickly put into an automatic squeezer. The press button is actuated to begin the automatic pressing of the mixture. The pressing pressure was 20 tons. Continuously collecting the dewaxed oil which automatically flows out during squeezing. After pressing for 30 minutes, a press stop button is actuated to stop pressing. Taking out and squeezing the filter cake cerate. The melting point of the cerate is tested to be 47 ℃, and the oil content is tested to be 23%.

Example 3:

heating 10 kg of the second-line distillate oil to 60 ℃, then slowly adding 90 kg of water at 60 ℃, then slowly cooling at a cooling speed of 10 ℃/h, gradually increasing the viscosity of the raw material along with the continuous cooling of the raw material to finally obtain a uniform viscous milky viscous mixture, putting the viscous milky viscous mixture into a filter bag, and then quickly putting the filter bag into an automatic squeezer. The press button is actuated to begin the automatic pressing of the mixture. The pressing pressure was 20 tons. Continuously collecting the dewaxed oil which automatically flows out during squeezing. After pressing for 30 minutes, a press stop button is actuated to stop pressing. Taking out and squeezing the filter cake cerate. The melting point of the cerate is tested to be 48 ℃, and the oil content is tested to be 18%.

Example 4:

heating 40 kg of the three-way distillate oil to 60 ℃, then slowly adding 60 kg of water at 60 ℃, then slowly cooling at the cooling speed of 8 ℃/h, gradually increasing the viscosity along with the continuous cooling of the raw material to finally obtain a uniform viscous milky viscous mixture, putting the viscous milky viscous mixture into a filter bag, and then quickly putting the filter bag into an automatic squeezer. The press button is actuated to begin the automatic pressing of the mixture. The pressing pressure was 20 tons. Continuously collecting the dewaxed oil which automatically flows out during squeezing. After pressing for 30 minutes, a press stop button is actuated to stop pressing. Taking out and squeezing the filter cake cerate. The melting point of the cerate is tested to be 51 ℃, and the oil content is tested to be 20%.

Example 5:

heating 50 kg of the minus four-line distillate oil to 70 ℃, then slowly adding 50 kg of water with the temperature of 60 ℃, then slowly cooling at the cooling speed of 8 ℃/h, gradually increasing the viscosity of the raw material along with the continuous cooling of the raw material, finally obtaining a uniform viscous milky viscous mixture, putting the viscous milky viscous mixture into a filter bag, and then quickly putting the filter bag into an automatic squeezer. The press button is actuated to begin the automatic pressing of the mixture. The pressing pressure was 20 tons. Continuously collecting the dewaxed oil which automatically flows out during squeezing. After pressing for 30 minutes, a press stop button is actuated to stop pressing. Taking out and squeezing the filter cake cerate. The melting point of the cerate is tested to be 53 ℃, and the oil content is tested to be 21%.

Example 6:

heating 40 kg of the reduced four-line distillate oil to 70 ℃, then slowly adding 60 kg of water at 60 ℃, then slowly cooling at the cooling speed of 8 ℃/h, gradually increasing the viscosity of the raw material along with the continuous cooling of the raw material, finally obtaining a uniform viscous milky viscous mixture, putting the viscous milky viscous mixture into a filter bag, and then quickly putting the filter bag into an automatic squeezer. The press button is actuated to begin the automatic pressing of the mixture. The pressing pressure was 20 tons. Continuously collecting the dewaxed oil which automatically flows out during squeezing. After pressing for 30 minutes, a press stop button is actuated to stop pressing. Taking out and squeezing the filter cake cerate. The melting point of the cerate is 54 ℃ through testing, and the oil content is 20%.

Many modifications may be made by one of ordinary skill in the art in light of the above teachings. Therefore, it is intended that the invention not be limited to the particular details of the embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.