A dual-function catalyst for producing low-freezing-point biodiesel, its preparation method and application

A dual-function catalyst and biodiesel technology, applied in the preparation of catalysts and catalyst fields, can solve the problems of easy deactivation and low selectivity, and achieve the effects of mild acidity, high selectivity and high liquid yield

Active Publication Date: 2021-11-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The main purpose of the present invention is to provide a dual-function catalyst for producing low freezing point biodiesel and its preparation method and application, so as to solve the problems of low selectivity and easy deactivation of the catalyst in the isomerization reaction in the prior art

Method used

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  • A dual-function catalyst for producing low-freezing-point biodiesel, its preparation method and application
  • A dual-function catalyst for producing low-freezing-point biodiesel, its preparation method and application
  • A dual-function catalyst for producing low-freezing-point biodiesel, its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A kind of Pd-Ni of this embodiment 2 P / SAPO-31 molecular sieve catalyzed a method for producing biodiesel with high selectivity by hydroisomerization of vegetable oil deoxygenated oil, the catalyst is 0.05%Pd+3%Ni 2 P / SAPO-31 molecular sieve bifunctional catalyst.

[0041] The experimental operation process of catalyst preparation is as follows:

[0042] Preparation of hierarchical porous nanometer SAPO-31 molecular sieve:

[0043] After the phosphoric acid of 5g 85%wt. is mixed with 15g deionized water, add 3g pseudo-boehmite (Al 2 o 3 The mass fraction is 71.13%wt.), 4g 95%wt. of di-n-butylamine, 3g silica sol (SiO 2 The mass fraction is 26.85%wt.) After the initial gel is made, it is transferred to a stainless steel crystallization kettle with a polytetrafluoroethylene liner, crystallized at a temperature of 185°C for 24h, and the crystallized product is cooled to room temperature, and then After centrifugation and washing, and dried at a temperature of 110°C fo...

Embodiment 2

[0050] A kind of Pd-Ni of this embodiment 2 P / SAPO-31 molecular sieve catalyzes the method for preparing biodiesel with high selectivity by hydroisomerization of vegetable oil deoxygenated oil, and the preparation method of the catalyst A is the same as that in Example 1.

[0051] Production of low freezing point biodiesel:

[0052] The above bifunctional catalyst A is first reduced to the reaction temperature in a fixed bed reactor at 400°C in a hydrogen atmosphere for 2 hours, and then the vegetable oil deoxygenated oil raw material solution is continuously injected into the fixed bed reactor with a metering pump, and the temperature is 340°C, The pressure is 2.0MPa, and the mass space velocity of vegetable oil deoxygenated oil is 1.67h -1 , the isomerization reaction was carried out under the condition that the volume ratio of hydrogen to vegetable oil deoxygenated oil was 500:1. The reaction time is 500h. The reaction conditions and product analysis results are shown in...

Embodiment 3

[0054] A kind of Pd-Ni of this embodiment 2P / SAPO-31 molecular sieve catalyzes the method for preparing biodiesel with high selectivity by hydroisomerization of vegetable oil deoxygenated oil, and the preparation method of the catalyst A is the same as that in Example 1.

[0055] Production of low freezing point biodiesel:

[0056] The above bifunctional catalyst A is first reduced to the reaction temperature in a fixed-bed reactor at 400°C for 2 hours in a hydrogen atmosphere, and then the raw material liquid of vegetable oil deoxygenated oil is continuously injected into the fixed-bed reactor with a metering pump, and is heated at a temperature of 350 ℃, the pressure is 2.0MPa, the mass space velocity of vegetable oil deoxygenated oil is 1.5h -1 , the isomerization reaction was carried out under the condition that the volume ratio of hydrogen to vegetable oil deoxygenated oil was 500:1. The reaction time is 500h. The reaction conditions and product analysis results are sh...

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Abstract

The present invention provides a kind of bifunctional catalyst for producing biodiesel with low freezing point and its preparation method and application. 2 P is a bimetallic active component, and the content of the active component is 0.05 to 5.05 wt% based on the weight of the carrier as 100%; the method for preparing biodiesel with low freezing point is to use vegetable oil hydrodeoxygenated oil as raw material , add the above-mentioned bifunctional catalyst, and carry out continuous reaction in the reactor, the reaction temperature is 250-370°C, the reaction pressure is 1.0-4.0MPa, and the mass space velocity of the vegetable oil hydrodeoxygenated oil is 1.0-4.0h ‑1 , the volume ratio of hydrogen to vegetable oil hydrodeoxygenated oil is 300-800:1. Catalyst of the present invention is carried Pd-Ni on the molecular sieve of hierarchical porous nanometer SAPO-31 2 The bifunctional catalyst prepared by the P bimetal has the advantages of less noble metal Pd consumption, high reactivity and isomerization selectivity, good stability, and high yield of biodiesel.

Description

technical field [0001] The invention relates to a method for preparing biodiesel with low freezing point through catalytic hydroisomerization by taking vegetable oil deoxygenated oil as raw material, a catalyst used therein and a method for preparing the catalyst. Background technique [0002] In recent years, with the development of the automobile industry and the advancement of engine technology, especially the continuous improvement of environmental protection requirements worldwide, there is a demand for environmentally friendly alkylated fuel oil with low aromatics and olefins content and good performance Increasingly, the contradiction between the supply and demand of non-renewable resources represented by petroleum is decreasing day by day and the fuel oil consumption is increasing is becoming more and more prominent in the world. The development and application of biofuel technology with renewable raw material resources has attracted widespread attention in many count...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85C10L1/02C11C3/12
CPCY02E50/10
Inventor 贾云刚吴伟何昌洪董平张建伟姜伟赵仲阳张铁珍何玉莲邓旭亮王东青李建忠王桂芝王东军邵荣兰牛明邵伟
Owner PETROCHINA CO LTD
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