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One-stage medium-pressure hydrogenation method for producing food-level white oil

A food-grade, white oil technology, applied in refining to remove heteroatoms, etc., can solve the problem of difficulty in producing food-grade white oil, and achieve the effects of low investment and operating costs, wide source of raw materials, and simple process

Active Publication Date: 2008-09-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Looking at the above-mentioned prior art, the one-stage method can only produce industrial-grade white oil; while the two-stage method can produce food-grade white oil, but it requires two different hydrogenation catalysts, and it is difficult to produce food-grade white oil in industrial practice.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of catalyst carrier: a kind of silicon and phosphorus macroporous and small pore aluminum hydroxide dry glue is made into 1000g according to mass ratio 4:1, add 25g of acetic acid, 25g of citric acid, 25g of kale powder and 800ml of deionized water, Kneading, extruding, drying at 110°C for 3 hours, and calcining at 550°C for 3 hours to make a carrier. The pore volume of the carrier is 0.82ml.g -1 , the specific surface is 316m 2 .g -1 , The bulk density is 540kg.m -3 , The shape is cylindrical, the particle size is Φ1.6×(4-6)mm, and it is dried at 120°C for 3 hours.

[0018] Preparation of impregnation solution: Add 810g of nickel nitrate to 500ml of deionized water at 20°C, stir to dissolve, and filter to obtain 1000ml of nickel nitrate aqueous solution, which contains 264kg.m of NiO -3 .

[0019] Take 100 g of the prepared carrier, 150 ml of the prepared impregnating solution, impregnate excessively at 20°C, dry at 110°C for 3 hours, bake at 480°C for...

Embodiment 2

[0021] The catalyst obtained in Example 1 was repeated in the third step of Example 1, and the obtained catalyst was denoted as C2. The main physicochemical properties are shown in Table 1.

Embodiment 3

[0023] Repeat the operation of Example 2 with the catalyst obtained in Example 2, and the obtained catalyst is denoted as C3, and the main physicochemical properties are shown in Table 1.

[0024] Table 1 Main physicochemical properties of white oil hydrotreating catalysts

[0025]

[0026] 2. Activation of the catalyst

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Abstract

The invention relates to a method for producing food-grade white oil through a medium pressure hydrogenation. After raw oil and hydrogen gas are mixed, the hydrogenation reaction is performed, under the reaction conditions as follows: the temperature is 180 to 320 DEG C, the hydrogen partial pressure is 4.0 to 1.0 Mpa, the volume space velocity is 0.1 to 1.0h<-1>, and the hydrogen and oil volume ratio is (200-1000):1; the catalyst pore volume is 0.4 to 1.0ml.g<-1>, and the specific surface area is 150 to 280m<2>.g<-1>; the content of active component metal Ni is 1 to 55 percent of the total weight of the catalyst, the carrier adopts the mixture of macropore aluminium oxide and microbore aluminium oxide, the weight ratio of the both is (2-4):1, silicon or / and phosphor is (are) added in the carrier as the additive, the content of the silicon in aluminium oxide is 1 to 20 percent, the content of the phosphor is 1 to 10 percent, or the content of the silicon and the phosphor is 1 to 10 percent. The method has the advantages that the process is simple, the operation is convenient, the investment and the operation costs are low, the raw material source is wide, and the method is applied to the production of the food-grade white oil.

Description

technical field [0001] The invention relates to a method for producing food-grade white oil by using refined lubricating oil base oil or industrial white oil as raw material and adopting one-stage medium-pressure hydrogenation. Background technique [0002] White oil refers to highly refined mineral oil, which has the characteristics of water white, transparent, and low impurities such as heterocyclic compounds containing sulfur, nitrogen, oxygen, and aromatic hydrocarbons. It is widely used in the industrial field and in the manufacture of daily chemicals. Applications. White oil can also be divided into industrial grade, cosmetic grade / pharmaceutical grade and food grade according to its impurity content, color and other characteristics. Among them, food-grade white oil has the deepest degree of refinement and the strictest quality requirements. [0003] Hydrofining produces white oil, the main principle of which is to hydrogenate and hydrogenate non-hydrocarbon compound...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/04
Inventor 邹士应曾佑富全瀛寰徐文清刘成林谭振明董元成
Owner PETROCHINA CO LTD
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