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Method and equipment for preparing long carbon chain olefins by use of natural alcohols or esters

A technology for long-carbon chain olefins and natural alcohols, applied in chemical instruments and methods, in the production of hydrocarbons and hydrocarbons from oxygen-containing organic compounds, etc., can solve the problems of low selectivity, high reaction temperature, and many side reactions, etc. The effect of saving petrochemical resources, reducing reaction temperature and improving yield

Active Publication Date: 2014-12-10
SHANGHAI OULEIFEN BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Alumina and molecular sieves are generally used as catalysts for the dehydration of alcohols to olefins. However, when alumina is used as a catalyst, the reaction temperature is high, energy consumption is high, and the selectivity is low. Molecular sieve catalysts are more acidic, have many side reactions, and are easy to coke. Inactivate

Method used

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  • Method and equipment for preparing long carbon chain olefins by use of natural alcohols or esters
  • Method and equipment for preparing long carbon chain olefins by use of natural alcohols or esters
  • Method and equipment for preparing long carbon chain olefins by use of natural alcohols or esters

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Experimental program
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Effect test

Embodiment 1

[0029] Anhydrous aluminum trifluoride (AlF 3 ) 600g, add 400g gamma-alumina (Al 2 o 3 ) and 50g of silicon oxide were mixed uniformly, and dilute nitric acid was added to the uniformly mixed material, extruded into strips on an extruder, placed in an oven to dry at 120°C for 8hrs, transferred to a muffle furnace for 3hrs at 500°C, and then cooled naturally to The catalyst is obtained at room temperature, then pulverized and sieved to obtain a catalyst with a particle size of about 2 mm for use; the catalyst is used in the dehydration reaction of n-octanol or n-octyl ester, the reaction pressure is 0.105 MPa, the reaction temperature is 290 ° C, and the liquid space velocity is 0.3 / hour, after continuous reaction for 12 hours, the conversion rate of n-octanol or n-octyl ester detected by gas chromatography is 95.5%, and the selectivity of n-octene in the olefin product is 98.2%, and the gas chromatogram is shown in figure 2 shown.

Embodiment 2

[0031] Anhydrous gallium trifluoride (GaF 3 ) 600g, add 400g gamma-alumina (Al 2 o 3 ) and 50g of silicon oxide were mixed uniformly, dilute nitric acid was added to the uniformly mixed material and extruded into strips on an extruder, placed in an oven to dry at 120°C for 8hrs, transferred to a muffle furnace for 3hrs at 450°C, and then cooled naturally to The catalyst is obtained at room temperature, then pulverized and sieved to obtain a catalyst with a particle size of about 2mm for use; the catalyst is used for the reaction of 2-octanol or 2-octyl ester, the reaction pressure is 0.1MPa, the reaction temperature is 310°C, and the liquid space velocity is 0.4 / hour, after continuous reaction for 12 hours, the conversion rate of 2-octyl alcohol or 2-octyl ester detected by gas chromatography is 97.5%, and the selectivity of 2-octene in the olefin product is 98.0%, and the gas chromatogram is shown in image 3 shown.

Embodiment 3

[0033] Chromium trifluoride (CrF 3 ) 600g, add 400g η-alumina (Al 2 o 3 ) mixed uniformly, dilute nitric acid was added to the uniformly mixed material and extruded into strips on an extruder, placed in an oven to dry at 120°C for 8hrs, transferred to a muffle furnace for 3hrs at 450°C and then naturally cooled to room temperature to obtain a catalyst. Then pulverize and sieve to obtain a catalyst with a particle size of about 2 mm for use; the catalyst is used for the n-decyl ester reaction, the reaction pressure is 0.06 MPa, the reaction temperature is 305 ° C, and the liquid space velocity is 0.35 / hour. After 12 hours of continuous reaction , the conversion rate of n-decyl ester detected by gas chromatography is 97.0%, and the selectivity of n-decene in the olefin product is 98.5%, and the gas chromatogram is shown in Figure 4 shown.

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Abstract

The invention relates to a method and equipment for preparing long carbon chain olefins by use of natural alcohols or esters. The method comprises the following steps: by using one or a mixture of one or more of natural alcohols or esters as a reaction primer, carrying out a reaction in a reactor filled with a catalyst after gasification; and then separating the product to prepare the long carbon chain olefins, wherein the natural alcohols or esters are one or more of primary alcohols, secondary alcohols, primary esters or secondary esters with 6-18 carbon atoms; the catalyst is a mixture of a metal fluoride and an oxide, wherein the oxide accounts for 8-100wt% of the catalyst and the metal fluoride accounts for 0-90wt% of the catalyst; the metal fluoride is one or more of aluminum trifluoride, chromium trifluoride or gallium trifluoride and the oxide is one or more of aluminum oxide or silicon dioxide. The method and equipment for preparing long carbon chain olefins by natural alcohols or esters provided by the invention have the beneficial effects of being high in production efficiency, energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to a method and equipment for preparing long-chain olefins from natural alcohols or esters. Background technique [0002] Long carbon chain olefins, especially long carbon chain alpha olefins, have important applications in many fields such as polymer modification, surfactants, lubricating oils, and cosmetics. At present, long-chain olefins are mainly produced by paraffin cracking, but the product obtained by this method has many components, which is difficult to separate and the efficiency is not high. In recent years, due to the development of biotechnology, the production of natural alcohols or esters has increased and the price has decreased, making it possible to prepare long-chain olefins through the dehydration of long-chain alcohols on a large scale, which can save a lot of petrochemical resources and meet the development trend and requirements of green chemistry. . [0003] Alumina and molecular sieves are generally use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/24C07C1/213C07C11/02B01J27/125B01J27/132
Inventor 陈刚
Owner SHANGHAI OULEIFEN BIOLOGICAL TECH
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