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Method for producing liquid paraffin by using waste animal and vegetable oil

A technology for animal and vegetable oils and liquid paraffin, which is applied in the refining of petroleum wax, chemical instruments and methods, chemical/physical processes, etc., and can solve the problems of difficult removal of aromatic hydrocarbon impurities, unfavorable sustainable development of resources, and complicated refining processes. , to achieve the effect of low cost, reducing table pollution and prolonging service life

Inactive Publication Date: 2019-01-04
LONGYAN ZHUOYUE NEW ENERGY CO LTD
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AI Technical Summary

Problems solved by technology

Existing liquid paraffins are generally obtained from fractions of light lubricating oil in crude oil cracking, and are obtained through acid-base refining, water washing, drying clay adsorption and other processes; the prepared liquid paraffins can be divided into C10-C13 shorts according to the length of the carbon chain. Chain liquid paraffin, C14-C17 medium-chain liquid paraffin and C18-C30 long-chain liquid paraffin; as a traditional method, the disadvantages are: obtaining liquid paraffin from crude oil contains aromatic hydrocarbon impurities, which are difficult to remove, the refining process is complicated, and the synthesis cost is high And it is not conducive to the sustainable development of resources
Chinese patent CN 103666519 A discloses a method for preparing alkanes by hydrodeoxygenating non-edible animal and vegetable oils. The non-edible animal and vegetable oils are hydrodeoxygenated in the presence of hydrocarbon solvents, and the product needs to be separated from the solvent again, which complicates the refining process.

Method used

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  • Method for producing liquid paraffin by using waste animal and vegetable oil
  • Method for producing liquid paraffin by using waste animal and vegetable oil
  • Method for producing liquid paraffin by using waste animal and vegetable oil

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preparation example Construction

[0021] 2. Preparation of catalyst: Ni-Mo-Co / Al was prepared by supersaturated impregnation method 3 o 2 Supported catalyst: (1) prepare ammonium molybdate aqueous solution and nickel nitrate aqueous solution with deionized water respectively, nickel nitrate solution is mixed dropwise in the ammonium molybdate solution, add ammonia water to be mixed with blue transparent dipping solution simultaneously; (2 ) Al with a particle size of 40-60 mesh after drying 3 o 2 The carrier is supersaturated and impregnated in Ni-Mo impregnation solution for 12 hours, dried in a vacuum oven at 120°C for 8 hours, and then placed in a muffle furnace for calcination at 500°C for 4 hours; (3) The calcined material is immersed in an aqueous solution of cobalt nitrate for 12 hours again, Repeat the above drying and calcination steps to get Ni-Mo-Co / Al 3 o 2 Supported catalyst, the relevant component content is Ni 10-20%, Mo 40-50%, Co 30-40% by molar ratio, and the total load is 15-20% accordin...

Embodiment 1

[0025] (1) The waste animal and vegetable oil raw material that adopts is gutter oil, physicochemical index: acid value 110.6mgKOH / g, iodine value 85.6gI 2 / 100g, saponification value 198.4mgKOH / g, water impurity mass fraction 2.61%, pH 5-6.

[0026] Waste oil pretreatment: Heat the waste oil to 90°C and let it stand for 12 hours to keep warm and settle, and discharge impurities such as bottom sediment, water and some flocculent organic suspended matter; then add 0.5% of 50% concentrated sulfuric acid to the material and react at 90°C for 0.5 h, let it settle for 1 hour to discharge the acid slag, add 10% NaHCO to the waste oil after the acidification treatment 3 The solution was neutralized to neutral, and the moisture brought by neutralization was removed; finally, 4% activated clay and 1% diatomaceous earth were added to the waste oil, stirred at 90°C for 1 hour, and then filtered to obtain a clear and transparent waste oil Oil.

[0027] (2) Preparation of hydrodeoxygenati...

Embodiment 2

[0033] (1) raw material is hogwash oil, physical and chemical index: acid value 9.6mgKOH / g, iodine value 82.1gI 2 / 100g, saponification value 199.8mgKOH / g, water impurity mass fraction 1.58%, pH 5-6.

[0034] (2) The raw material oil pretreatment, catalyst preparation, sulfidation and hydrogenation reduction are the same as in Example 1.

[0035] (3) The reaction conditions are the same as in Example 1.

[0036] (4) Reaction result: the conversion rate of hogwash oil is 99.99%, basically completely converted. Obtain colorless and transparent liquid paraffin, the chromatographic analysis of liquid paraffin distribution is shown in Table 1.

[0037] (5) After continuous reaction for 600 hours, the catalytic activity did not decrease, and the conversion rate was still 99.99%.

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Abstract

The invention discloses a method for producing liquid paraffin by using waste animal and vegetable oil. The method comprises the following steps: using the waste animal and vegetable oil as a raw material, after impurity-removing purification pre-treatment, entering a fixed bed reactor loaded with a catalyst, performing hydrodeoxygenation, decarbonylation and decarboxylation reactions to prepare the liquid paraffin, and performing rectification, to obtain C8-C13 short-chain liquid paraffin, C13-C18 medium-chain liquid paraffin and C17-C24 long-chain liquid paraffin, wherein the catalyst is a Ni-Mo-Co / Al3O2 supported catalyst prepared by using a supersaturated dipping method. The method has the characteristics of simple preparation technologies and devices, low production cost, low catalysis life, high waste oil conversion rate, high yield and quality of liquid paraffin products.

Description

technical field [0001] The invention relates to a comprehensive utilization technology of waste oil and the technical field of industrial catalysis, in particular to a method for producing liquid paraffin by using waste animal and vegetable oil. Background technique [0002] Liquid paraffin is an important chemical raw material, widely used in the preparation of chlorinated paraffin, leather additives, rubber flame retardants, paint additives, etc. Existing liquid paraffins are generally obtained from fractions of light lubricating oil in crude oil cracking, and are obtained through acid-base refining, water washing, drying clay adsorption and other processes; the prepared liquid paraffins can be divided into C10-C13 shorts according to the length of the carbon chain. Chain liquid paraffin, C14-C17 medium-chain liquid paraffin and C18-C30 long-chain liquid paraffin; as a traditional method, the disadvantages are: obtaining liquid paraffin from crude oil contains aromatic hyd...

Claims

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Application Information

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IPC IPC(8): B01J23/883C10G73/44
CPCB01J23/002B01J23/883B01J2523/00C10G73/44B01J2523/31B01J2523/68B01J2523/847B01J2523/845
Inventor 叶活动陈丹林泽虎谢运羲
Owner LONGYAN ZHUOYUE NEW ENERGY CO LTD
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