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A method for producing food-grade white oil by extracting oil under normal and reduced pressure

An oil extraction, atmospheric and vacuum technology, which is used in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of poor sulfur resistance, high equipment requirements, and high raw material requirements for supplementary refining catalysts, and can reduce equipment costs. requirements, low reaction temperature, and high metal dispersion

Active Publication Date: 2017-02-01
洛阳金达石化有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] US5993644, US5855767, US5879539 and US5976354 all mentioned a method of producing white oil using a noble metal catalyst as a supplementary hydrogenation refining catalyst, but because the isomerization dewaxing catalyst in the previous paragraph uses a weakly acidic mesoporous molecular sieve to improve the isomerization reaction The selectivity of the catalyst makes the sulfur resistance performance of the supplementary refined catalyst worse and requires high raw materials
[0008] CN1352233 discloses a method for producing white oil from solvent oil through hydrotreating, hydrorefining, isomerization dewaxing, hydrogenation supplementary refining, and its raw material requirements are vacuum distillates and vacuum residues higher than 310°C Propane deasphalted oil and FCC heavy cycle oil have high raw material requirements; high reaction temperature is required to produce white oil during hydrofining, isomerization dewaxing and supplementary refining, high production cost, high equipment requirements and low yield

Method used

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  • A method for producing food-grade white oil by extracting oil under normal and reduced pressure
  • A method for producing food-grade white oil by extracting oil under normal and reduced pressure
  • A method for producing food-grade white oil by extracting oil under normal and reduced pressure

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Experimental program
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Effect test

Embodiment 1

[0024] See Table 1 for the properties of the oil extracted from the raw material at atmospheric and vacuum pressure.

[0025] Table 1 Raw material properties

[0026]

[0027] A method for producing food-grade white oil by extracting oil under normal and reduced pressure, comprising the following steps:

[0028] Step 1. Heat the extracted oil under normal and reduced pressure to 300°C, mix it with hydrogen, introduce it into two series-connected reactors loaded with Catalyst I and Catalyst II respectively, contact with the catalyst, and carry out hydrofining under the action of hydrofining catalyst Reaction, Catalyst I is a W-Mo-Ni catalyst with a pore volume of 0.20-0.50mL·g -1 , the specific surface area is 150~260m 2 g -1 , Catalyst II is a W-Ni catalyst with a pore volume of 0.20-0.50mL·g -1 , the specific surface area is 90~150m 2 g -1 ;

[0029] Step 2, the product after refining is through gas-liquid separation, steam stripping and fractional distillation, rem...

Embodiment 2

[0039] See Table 4 for the properties of the oil extracted from the raw material at atmospheric and vacuum pressure.

[0040] Table 4 Raw material properties

[0041]

[0042] A method for producing food-grade white oil by extracting oil under normal and reduced pressure, comprising the following steps:

[0043] Step 1. Heat the extracted oil under normal and reduced pressure to 350°C, mix it with hydrogen, introduce it into two series-connected reactors loaded with Catalyst I and Catalyst II respectively, contact with the catalyst, and carry out hydrofining under the action of hydrofining catalyst Reaction, Catalyst I is a W-Mo-Ni catalyst with a pore volume of 0.20-0.50mL·g -1 , the specific surface area is 150~260m 2 g -1 , Catalyst II is a W-Ni catalyst with a pore volume of 0.20-0.50mL·g -1 , the specific surface area is 90~150m 2 g -1 ;

[0044] Step 2, the product after refining is through gas-liquid separation, steam stripping and fractional distillation, rem...

Embodiment 3

[0054] See Table 7 for the properties of the oil extracted from the raw material at atmospheric and vacuum pressure.

[0055] Table 7 Raw material properties

[0056]

[0057] A method for producing food-grade white oil by extracting oil under normal and reduced pressure, comprising the following steps:

[0058] Step 1. Heat the extracted oil under normal and reduced pressure to 350°C, mix it with hydrogen, introduce it into two series-connected reactors loaded with Catalyst I and Catalyst II respectively, contact with the catalyst, and carry out hydrofining under the action of hydrofining catalyst Reaction, Catalyst I is a W-Mo-Ni catalyst with a pore volume of 0.20-0.50mL·g -1 , the specific surface area is 150~260m 2 g -1 , Catalyst II is a W-Ni catalyst with a pore volume of 0.20-0.50mL·g -1 , the specific surface area is 90~150m 2 g -1 ;

[0059] Step 2, the product after refining is through gas-liquid separation, steam stripping and fractional distillation, rem...

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Abstract

The invention discloses a method for producing food-grade white oil with atmospheric-vacuum extraction oil. According to the invention, the raw material atmospheric-vacuum extraction oil is heated; the oil is delivered into two serially connected reactors respectively loaded with a catalyst I and a catalyst II, and contacts the catalysts; under the effect of a hydro-refining catalyst, a hydro-treating reaction is carried out, and de-S, de-N and aromatic saturation reactions are carried out; a refined product is subjected to gas-liquid separation, stripping and fractionation, such that produced H2S is removed; a component with a boiling point higher than 230 DEG C is cut from a distillate, and is adopted as a feed of an isomerization dewaxing reaction; the isomerization dewaxing reaction is carried out with a catalyst III; an oil product produced through the isomerization dewaxing reaction is cooled, and is subjected to a hydro-finishing reaction with a catalyst IV; an oil product obtained after the reaction is subjected to product cutting in a fractionation system, such that the food-grade white oil with an aromatic hydrocarbon content lower than 0.01% w / w, a sulfur content lower than 1ppm, and a solidifying point lower than -30 DEG C is obtained.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a method for producing food-grade white oil by using atmospheric and vacuum extracted oil. Background technique [0002] White oil is a type of petroleum product obtained by deep refining of lubricating oil fractions to remove impurities such as aromatics and sulfides in lubricating oil fractions. It is colorless, tasteless, odorless, chemically inert and has excellent light and heat stability. It is widely used in chemical industry, daily necessities, food, medicine, textile and agriculture and other fields. According to different uses and refining depths, white oil can be divided into industrial grade, cosmetic grade, food grade and pharmaceutical grade. Among them, food-grade white oil has the deepest degree of refinement and the strictest quality requirements. [0003] Food-grade white oil is mainly used in food packaging paper, defoaming agent fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/02
Inventor 王进才牛同治赵华王银盘孟立张红涛韩明李建伟韩婵徐翠翠
Owner 洛阳金达石化有限责任公司
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