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A method for directly preparing normal isoparaffins from waste oil

A technology of isoparaffin and waste oil, which is applied in the field of preparation of organic compounds, can solve the problems of high production equipment cost investment, complex operation process, high hydrogen consumption and energy consumption, and achieve moderate acidity, low diffusion resistance and reduced hydrogen consumption. Effect

Active Publication Date: 2019-07-30
NANJING KANG XIN CHENG BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Purpose of the invention: In order to overcome the defects of complex multi-step operation process, high hydrogen consumption and energy consumption, large investment and high cost of production equipment in the prior art, the present invention proposes a simple, easy-to-operate, hydrogen Method for directly preparing n-isoparaffin from waste oil with low energy consumption, low investment and high yield

Method used

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  • A method for directly preparing normal isoparaffins from waste oil
  • A method for directly preparing normal isoparaffins from waste oil
  • A method for directly preparing normal isoparaffins from waste oil

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Embodiment 1

[0032] Please refer to figure 1 , a method for directly preparing normal isoparaffins from waste oil, comprising the following steps:

[0033] (1) Catalyst preparation: Mix silica sol, aluminum sol and nickel nitrate evenly, and spray the mixture into a furnace at 400°C with a spray system to obtain NiO / SiO with a particle diameter of 50 μm 2 -Al 2 o 3 Catalyst, based on the mass of the catalyst, the mass content of NiO is 10%, SiO 2 The mass content is 40%, Al 2 o 3 The mass content of the catalyst is 50%. During the preparation process, the addition amount of silica sol, aluminum sol and nickel nitrate can be calculated according to the composition of the final catalyst.

[0034] (2) The waste vegetable oil with a volume ratio of 100:1 and H containing 5% CO 2 Pre-mixing is carried out, and after being preheated by the heating furnace 1, it enters the distributor 21 located at the bottom of the slurry bed reactor 2 for secondary mixing to uniformly form a mixed materia...

Embodiment 2

[0040] Please refer to figure 1 , a method for directly preparing normal isoparaffins from waste oil, comprising the following steps:

[0041] (1) Preparation of catalyst: Mix silica sol, aluminum sol and nickel nitrate evenly, and spray the mixture into a furnace at 600°C by using a spray system to obtain NiO / SiO with a particle diameter of 100 μm 2 -Al 2 o 3 Catalyst, by the mass of catalyst, the mass content of NiO is 20%, SiO 2 The mass content is 60%, Al 2 o 3 The mass content of the catalyst is 20%. During the preparation process, the addition amount of silica sol, aluminum sol and nickel nitrate can be calculated according to the composition of the final catalyst.

[0042] (2) Mix waste cooking oil with a volume ratio of 50:1 and H containing 50% CO 2 Pre-mixing is carried out, and after being preheated by the heating furnace 1, it enters the distributor 21 located at the bottom of the slurry bed reactor 2 for secondary mixing to uniformly form a mixed material; ...

Embodiment 3

[0048] Please refer to figure 1 , a method for directly preparing normal isoparaffins from waste oil, comprising the following steps:

[0049] (1) Preparation of catalyst: Mix silica sol, aluminum sol and nickel nitrate evenly, and spray the mixture into a furnace at 500°C with a spray system to obtain NiO / SiO with a particle diameter of 70 μm 2 -Al 2 o 3 Catalyst, by the mass of catalyst, the mass content of NiO is 15%, SiO 2 The mass content is 50%, Al 2 o 3 The mass content of the catalyst is 35%. During the preparation process, the addition amount of silica sol, aluminum sol and nickel nitrate can be calculated according to the composition of the final catalyst.

[0050] (2) The waste cooking oil with a volume ratio of 70:1 and H containing 10% CO2 Pre-mixing is carried out, and after being preheated by the heating furnace 1, it enters the distributor 21 located at the bottom of the slurry bed reactor 2 for secondary mixing to uniformly form a mixed material;

[0051...

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Abstract

The invention discloses a method for directly preparing normal isoparaffins from waste oils and fats. A large amount of water produced in the hydrogenation process of waste oils is used to feed H 2 CO is added to the water, and CO and water are reacted to produce CO 2 and H 2 , to provide "in-situ" hydrogen for oil hydrogenation, greatly reducing the hydrogen consumption in the reaction process. The invention adopts a slurry bed reactor, which can be operated almost isothermally, and the catalyst used is NiO / SiO with a particle diameter of 50-100 μm 2 ‑Al 2 o 3 Catalyst with low mass transfer diffusion resistance and moderate acidity, which is beneficial to convert normal paraffins into isoparaffins and avoid further cracking into low molecular weight normal paraffins or isoparaffins. Moreover, the waste oil of the present invention can be completely converted into normal isoparaffins, the yield of normal isoparaffins is more than 80%, and the maximum hydrogen consumption in the reaction process is not more than 1%, which greatly reduces the production cost.

Description

technical field [0001] The invention relates to the field of preparation of organic compounds, in particular to a method for directly preparing normal isoparaffins from waste oil. Background technique [0002] With the increasing shortage of global fossil energy, the market needs to produce a large amount of clean fuel. As a renewable resource, bio-oil has been widely valued in the world. In recent years, the technology of using solid acid and alkali catalysts to catalyze the transesterification of bio-oil and methanol or ethanol to prepare biodiesel has been widely studied, but the obtained biodiesel is mainly fatty acid methyl or ethyl ester, which has high oxygen content and low calorific value. Low and cannot be directly used in internal combustion engines. In addition, a large amount of by-product glycerol is produced during the transesterification process, which increases the production cost. Therefore, using new processes to convert bio-oils into direct alkanes by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00B01J23/755
CPCC10G3/00C10G3/44C10G3/50C10G3/56B01J23/002B01J23/755B01J2523/00C10G2300/1007B01J2523/31B01J2523/41B01J2523/847Y02P30/20
Inventor 王耀王继元
Owner NANJING KANG XIN CHENG BIOLOGICAL TECH CO LTD