阅读说明：本技术 一种溶剂法压榨脱蜡生产石油蜡乳液原料的方法 (Method for producing petroleum wax emulsion raw material by solvent method squeezing 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：本发明旨在于提供一种溶剂法压榨脱蜡生产石油蜡乳液原料的方法,将原料蜡油加热,搅拌加入有机溶剂,然后冷却成膏状,将膏状的混合物放入滤袋进行压榨脱油得到蜡膏,将蜡膏蒸馏脱除溶剂得到石蜡。通过加入有机溶剂,可以使在压榨原料油冷冻过程中大大降低冷冻原料的粘度,因此在冷冻原料压榨脱蜡的过程中极大的提高了压榨效率,使得脱蜡产品蜡膏含油大大降低,蜡膏含油量降低到了8～20％,提高效率50％以上。(The invention aims to provide a method for producing petroleum wax emulsion raw material by solvent method squeezing dewaxing, which comprises the steps of heating raw material wax oil, stirring and adding an organic solvent, then cooling into paste, putting the paste mixture into a filter bag for squeezing and deoiling to obtain wax paste, and distilling the wax paste to remove the solvent to obtain paraffin. By adding the organic solvent, the viscosity of the frozen raw material can be greatly reduced in the process of freezing the squeezed raw material oil, so that the squeezing efficiency is greatly improved in the process of squeezing and dewaxing the frozen raw material, the oil content of the dewaxed product cerate is greatly reduced, the oil content of the cerate is reduced to 8-20%, and the efficiency is improved by more than 50%.)

1. A method for producing petroleum wax emulsion raw material by solvent method squeezing dewaxing is characterized in that raw material wax oil is heated, organic solvent is added under stirring, then the raw material wax oil is cooled into paste, the paste mixture is placed into a filter bag to be squeezed and deoiled to obtain wax paste, and the wax paste is distilled to remove the solvent to obtain the oil-containing wax paste.

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

3. The method of claim 1, comprising: the organic solvent comprises at least one of toluene, xylene, acetone, butanone, methyl isobutyl ketone, No. 120 solvent oil, No. 200 solvent oil and low boiling point oil.

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

5. The method of claim 1, comprising: adding an organic solvent, and cooling to form a paste at the temperature of-10-35 ℃.

6. The method of claim 1, comprising: the parts of the raw material wax oil and the organic solvent are 0.5-10 parts: 10 to 0.5 portion.

Technical Field

The invention belongs to the technical field of petrochemical industry, and particularly relates to a method for producing oil-containing paraffin by solvent method squeezing and dewaxing, wherein the oil-containing paraffin can be directly used for producing petroleum wax emulsion.

Background

The conventional press dewaxing process is a solvent-free press dewaxing process, in which a press raw material is frozen to a desired temperature in a dewaxing crystallization device and then press-filtered by a filter press to separate crystalline paraffin from cold dewaxed oil. Filtering to obtain two kinds of product cerate and filtrate, namely dewaxed oil. The cerate generally contains 60-80% paraffin. Therefore, the cerate needs to be deoiled further to obtain industrial paraffin 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 raw materials have low temperature and high viscosity, so that the filtering efficiency is low, and the oil content of the wax paste of the conventional squeezing dewaxing product 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 petroleum wax emulsion raw material by solvent method squeezing dewaxing, which is characterized in that the raw material wax oil is heated, organic solvent is added under stirring, then the mixture is cooled into paste, the paste mixture is placed into a filter bag to be squeezed and deoiled to obtain wax paste, and the wax paste is distilled to remove solvent to obtain the oil-containing paraffin. The oil-containing paraffin can be directly used for producing petroleum wax emulsion. The petroleum wax emulsion can be used in the production processes of fiberboards, artificial boards, ceramics, paper making and textiles.

The invention has the beneficial effects that:

according to the invention, the organic solvent is added on the basis of the conventional squeezing dewaxing process, so that the viscosity of the frozen raw material can be greatly reduced in the freezing process of the squeezed raw material oil, the filtering squeezing efficiency is greatly improved in the squeezing dewaxing process of the frozen raw material, the oil content of the dewaxed product cerate is greatly reduced, the oil content of the cerate is reduced to 8-25%, and the efficiency is improved by more than 50%.

Further, the raw material wax oil is second-line-reduced distillate oil, third-line-reduced distillate oil or fourth-line-reduced distillate oil. The reduced second-line distillate oil, the reduced third-line distillate oil or the reduced fourth-line distillate oil is a product flowing out of a vacuum tower of the petroleum vacuum distillation device, and the reduced second-line distillate oil, the reduced third-line distillate oil or the reduced fourth-line distillate oil contains paraffin and light component oil.

Further, the organic solvent comprises toluene, xylene, acetone, butanone, methyl isobutyl ketone, No. 120 solvent oil, No. 200 solvent oil and low boiling point oil.

Further, heating the raw material wax oil to 60-150 ℃.

Further, the temperature of the paste after the organic solvent is added and cooled is-10-35 ℃.

Further, the ratio of the raw material wax oil to the organic solvent in parts is 0.5-10: 10 to 0.5.

Detailed Description

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 20 deg.C/hr, adding the pasty mixture into a filter bag when the raw material is cooled to pasty temperature of 15 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 wax is tested to be 42 ℃, and the oil content is 35%.

Example 1:

60 parts of the second-cut distillate is heated to 60 ℃, and then 40 parts of dimethylbenzene is added slowly while stirring. When cooled to a temperature of 10 c at which the mixture is pasty, the pasty mixture is added to a filter bag, which is then rapidly placed in an automatic press. 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 xylene in the cerate is distilled out of the cerate by a distillation method. The testing shows that the melting point of the distilled cerate is 47 ℃, and the oil content is 15%.

Example 2:

50 parts of three-way distillate oil is heated to 70 ℃, and then 50 parts of toluene is added slowly while stirring. When cooled to a temperature of 5 c at which the mixture is pasty, the pasty mixture is added to a filter bag, which is then rapidly placed in an automatic press. 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 toluene in the cerate is distilled out of the cerate by a distillation method. The melting point of the distilled cerate is tested to be 51 ℃, and the oil content is 16%.

Example 3:

80 parts of minus four-line distillate oil is heated to 80 ℃, and then 20 parts of butanone is added slowly while stirring. When cooled to a temperature of 15 c at which the mixture is pasty, the pasty mixture is added to a filter bag, which is then rapidly placed in an automatic press. 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 butanone in the cerate is distilled out of the cerate by a distillation method. The testing shows that the melting point of the distilled cerate is 45 ℃, and the oil content is 19%.

Example 4:

heating 90 parts of the second-cut distillate to 90 ℃, and then slowly adding 10 parts of methyl isobutyl ketone while stirring. When cooled to a temperature of 35 c at which the mixture is pasty, the pasty mixture is added to a filter bag, which is then rapidly placed in an automatic press. 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. Distilling the methyl isobutyl ketone from the cerate by using a distillation method. The melting point of the distilled cerate is tested to be 42 ℃, and the oil content is 18%.

Example 5:

40 parts of the second-cut distillate is heated to 110 ℃, and then 60 parts of ethanol is added while slowly stirring. When cooled to a temperature of 15 c at which the mixture is pasty, the pasty mixture is added to a filter bag, which is then rapidly placed in an automatic press. 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. Distilling the ethanol from the cerate to obtain the product. The testing shows that the melting point of the distilled cerate is 50 ℃, and the oil content is 14%.

Example 6:

heating 20 parts of the second-line distillate to 150 ℃, and then slowly adding 80 parts of No. 120 solvent oil while stirring. When cooled to a temperature of 15 c at which the mixture is pasty, the pasty mixture is added to a filter bag, which is then rapidly placed in an automatic press. 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. Distilling the No. 120 solvent oil in the cerate by using a distillation method to distill the No. 120 solvent oil from the cerate. The testing shows that the melting point of the distilled cerate is 52 ℃, and the oil content is 17%.

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.