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Preparation process for synthesizing catalyst for low-carbon olefin by carbon dioxide hydrogenation one-step method

A technology of carbon dioxide and low-carbon olefins, which is applied in the field of preparation of catalysts for the one-step hydrogenation of carbon dioxide to synthesize low-carbon olefins. It can solve the problems of methanol single-pass yield limitation and achieve the effects of equipment reduction, investment reduction and process simplification

Inactive Publication Date: 2011-01-19
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Synthesis of methanol by hydrogenation is the conversion of CO 2 However, due to thermodynamic constraints, the single-pass yield of methanol has been limited to a low level

Method used

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  • Preparation process for synthesizing catalyst for low-carbon olefin by carbon dioxide hydrogenation one-step method
  • Preparation process for synthesizing catalyst for low-carbon olefin by carbon dioxide hydrogenation one-step method
  • Preparation process for synthesizing catalyst for low-carbon olefin by carbon dioxide hydrogenation one-step method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 (CuO-ZnO-ZrO 2 Catalyst):

[0040] Add 100 grams of deionized water to the three-necked bottle, then place the three-necked bottle in a 95°C constant temperature water bath, and mix 48 grams of 25% copper nitrate solution, 90 grams of 30% zinc nitrate solution, and 48 grams of zirconium oxychloride 30% Solution and 25 grams of 12% urea solution are dripped into the three-necked flask in parallel, and the pH value of the solution is adjusted to about 11 by controlling the drip rate of each solution during the dropwise addition. After the drop is completed, continue to stir for 8 hours. After aging for 5 hours, washing with suction filtration, drying at 110°C for 24 hours, and then roasting at 350°C for 4 hours, CuO-ZnO-ZrO 2 catalyst.

[0041] see figure 1 , as can be seen from the figure, in the composite catalyst CuO-ZnO-ZrO 2 / SBAPO-34 contains CuO (2θ=35.6°, 39.1°, 49.0°), ZnO (2θ=31.8°, 34.5°, 47.5°, 56.7°), ZrO 2 = (36.3°, 62.9°, 68.1°) and SBAPO-...

Embodiment 2

[0046] Take by weighing 5.62 grams of pseudohydroboehmite (containing Al 2 o 3 72.6%) was dissolved in 65 grams of deionized water, 49 grams of 10% phosphoric acid solution was slowly added under stirring, and then 8.54 grams of silica gel (containing SiO 2 28.1%) and 0.98 grams of boron trioxide were added, continued to add 2.5 grams of seed crystal SAPO-34 (directing agent) and 2.65 grams of the prepared CuO-ZnO-ZrO catalyst, finally added 4.04 grams of triethylamine, and continued to stir for 30 minutes , loaded into a reaction kettle, crystallized at 180°C and autogenous pressure for 72 hours, then filtered, washed with deionized water until neutral, then dried in air at 110°C for 24 hours, and calcined at 580°C for 4 hours to obtain CuO-ZnO-ZrO 2 / SBAPO-34 catalyst. The X-ray powder diffraction data of the resulting finished product have attached Figure 1 Characteristics.

[0047] After the catalyst powder is tabletted and pulverized, the 40-60 mesh particles are sc...

Embodiment 3

[0050] Weigh 5.81 grams of pseudohydroboehmite (containing Al 2 o 3 72.6%) was dissolved in 71 grams of deionized water, 54 grams of 10% phosphoric acid solution was slowly added under stirring, and then 8.78 grams of silica gel (containing SiO 2 28.1%) and 1.11 grams of boron trioxide were added, and continued to add 2.5 grams of seed crystal SAPO-34 (directing agent) and the prepared CuO-ZnO-ZrO 2 Catalyst 2.81 grams, finally add 4.15 grams of triethylamine, continue to stir for 30 minutes, put into the reactor, crystallize at 180 ° C and autogenous pressure for 72 hours, then filter, wash with deionized water until neutral, and then in 110 ° C Dry in the air for 24 hours and bake at 580°C for 4 hours to prepare CuO-ZnO-ZrO 2 / SBAPO-34 catalyst. The X-ray powder diffraction data of the resulting finished product have attached Figure 1 Characteristics.

[0051] After the catalyst powder is tabletted and pulverized, the 40-60 mesh particles are screened, and the reductio...

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Abstract

The invention belongs to the field of composite catalyst synthesis, and particularly relates to a preparation process for synthesizing a catalyst for low-carbon olefin by a carbon dioxide hydrogenation one-step method. The process comprises the following steps of: (1) selecting heteroatom boron source, aluminum source, silicon source, phosphorous source, R, copper source, zinc source, zirconium source and deionized water as raw materials, and dissolving the aluminum source into water to prepare A, wherein the R is a template agent; (2) dripping the phosphorous source into the A to form solution B; (3) slowly dripping the silicon source into the solution B to form solution C; (4) dripping the heteroatom boron source into the C to form solution D; (5) adding a directing agent and a CuO-ZnO-ZrO2 catalyst into the solution D, and adding the R into the solution; and (6) filling the solution into a reaction kettle, and performing crystallization, filtration, washing, drying and baking to obtain a target product. The process simplifies the flow, reduces the equipment, and has low investment cost.

Description

technical field [0001] The invention belongs to the field of synthetic catalysts, in particular to a SBAPO-34 molecular sieve shell, CuO-ZnO-ZrO 2 The invention discloses a preparation process of a catalyst used for the one-step hydrogenation of carbon dioxide to synthesize light olefins. Background technique [0002] The rapid growth of population and the rapid development of industry have led to a large consumption of fossil energy, CO 2 emissions are increasing year by year. According to statistics, the CO emitted into the atmosphere around the world 2 The total amount has exceeded 50 billion t / a, of which the CO released by the use of fossil energy 2 The volume accounts for about 77% of the total. A lot of CO 2 The gas is discharged into the atmosphere, which has a huge impact on the atmospheric environment. It causes global warming, brings serious damage to the ecological environment, makes the global climate abnormal, and triggers frequent natural disasters. At h...

Claims

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Application Information

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IPC IPC(8): B01J29/85C07C1/12C07C11/04C07C11/02
CPCY02P20/52
Inventor 连丕勇宋丽娟李其明王志敏张照飞佟天宇尹延超辛春玲赵学勤
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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