Hydrogenation alkyne removal method for methanol-to-olefin process ethylene material

A technology for producing olefins and materials from methanol, which is applied in the fields of hydrogenation to hydrocarbons, purification/separation of hydrocarbons, chemical instruments and methods, etc., can solve the problems of long distance for industrial application, unfavorable industrial application, and low acetylene conversion rate. , to achieve the effect of excellent anti-coking performance, moderate reactivity and low ethylene loss rate

Inactive Publication Date: 2018-07-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is to prepare intermetallic compounds under high temperature conditions for selective hydrogenation of acetylene. The conversion rate of acetylene is low and the reaction temperature is high, which is not conducive to industrial application.
And the catalyst is prepared by hot melting method,

Method used

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  • Hydrogenation alkyne removal method for methanol-to-olefin process ethylene material
  • Hydrogenation alkyne removal method for methanol-to-olefin process ethylene material
  • Hydrogenation alkyne removal method for methanol-to-olefin process ethylene material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Weigh a clover-shaped α-alumina carrier of Φ4.5×4.5mm. Take an appropriate amount of ferric nitrate, dissolve it in 60ml of deionized water by heating, adjust the pH value to 2.5, impregnate the equal volume on the surface of the carrier at the temperature of the impregnating solution at 50°C, flip the carrier quickly and impregnate for 6 minutes, let it rest for 30 minutes until the adsorption equilibrium, and age at 60°C for 30 minutes, then Follow the program in the oven: Dry the catalyst, and then use the temperature programming method to activate the catalyst. The activation procedure: Weigh an appropriate amount of cobalt nitrate, and impregnate according to the above preparation steps. The physical properties of the obtained catalyst and the contents of each component are shown in Table 1.

[0094] Before the catalyst is used, it is reduced with 40% hydrogen + 60% nitrogen in a reduction furnace, the reduction temperature is 280° C., the pressure is 0.5 MPa...

Embodiment 2

[0098] At 50°C, a certain amount of NaAlO 2 solution and ZrCl 4 The solution was stirred and mixed, then neutralized with nitric acid solution, stirred for 10 hours, and uniform Al-Zr particles were formed by co-precipitation. The resultant was filtered and the Na in it was washed with deionized water + and Cl - Ions, and then add an appropriate amount of polyvinyl alcohol with a mass concentration of 15% as a pore-forming agent, and knead it into shape. Dry at 130°C for 2h, and calcined at 650°C for 4h to obtain a Zr-Al composite support. The mass ratio of alumina to zirconia in the carrier is 4:1.

[0099] The catalyst was prepared with alumina-zirconia composite carrier. Take an appropriate amount of ferric chloride and cobalt chloride, heat and dissolve in deionized water, adjust the pH value to 2.0, and impregnate the excess on the carrier at a temperature of 80°C, shake the beaker for 10 minutes, and filter off the excess impregnating liquid. Aging in a water bath ...

Embodiment 3

[0104] Weigh 100ml of a Φ1.5mm spherical α-alumina carrier. Dissolve an appropriate amount of ferric nitrate in 40ml of deionized water, adjust the pH value to 3.0, soak the liquid at a temperature of 40°C, spray the watering can onto the carrier, load it in the drum for 10 minutes to load the active components evenly, and control the loading process to 6 minutes to complete, then Follow the program in the oven: Dry the catalyst, move the catalyst into an evaporating dish, and activate the catalyst in a muffle furnace using a temperature-programmed method. The activation procedure: Obtain a catalyst dip.

[0105] Using the same method as the first step, take an appropriate amount of cobalt nitrate, dissolve it, spray it on the surface of the dipped catalyst, dry it, and roast it to obtain the final catalyst. Drying procedure: Roasting procedure: The physical properties of the obtained catalyst and the contents of each component are shown in Table 1.

[0106] Befor...

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Abstract

A hydrogenation alkyne removal method for a methanol-to-olefin process ethylene material is characterized in that an Fe-Co hydrogenation catalyst is used, a methanol-to-ethylene product is added to ahydrogenation reactor and undergoes selective hydrofining, a tiny amount of acetylene contained in tower top effluent obtained after alkali washing, drying, demethanation and deethanization of the methanol-to-ethylene product is adopted as a hydrogenation object, and a raw material mainly contains 99.9% or more (phi) of ethylene, 5-100 ppm of acetylene and 1-10 ppm of CO. Reaction conditions are as follows: the inlet temperature of the reactor is 30-80 DEG C, the reaction pressure is 1.5-3.0 MPa, and the space velocity is 2000-10000 h<-1>; the hydrogenation catalyst is a Fe-Co selective hydrogenation catalyst, and adopts a high temperature-resistant inorganic oxide as a carrier, the active components of the catalyst contain Fe and Co, and 100 mass% of the catalyst contains 2-6 mass% of Feand 0.5-1.5 mass% of Co; and the specific surface area of the catalyst is 10-200 m<2>/g, and the pore volume is 0.2-0.63 ml/g. The catalyst has the advantages of mild hydrogenation activity, excellentethylene selectivity, no ethylene loss and low green oil generation amount, and has a far lower cost than a precious metal Pd catalyst.

Description

technical field [0001] The invention relates to a method for hydrogenation and removal of acetylene from ethylene products in methanol to ethylene, in particular to a method for selective hydrogenation of trace acetylene by using an Fe-Co hydrogenation catalyst in the products of methanol to ethylene. Background technique [0002] Low-carbon olefins such as ethylene and propylene are important basic chemical raw materials. With the development of my country's national economy, especially the development of modern chemical industry, the demand for low-carbon olefins is increasing day by day, and the contradiction between supply and demand will become increasingly prominent. So far, the important way to produce low-carbon olefins such as ethylene and propylene is still through catalytic cracking and cracking of naphtha and light diesel oil (both from petroleum). As raw materials for ethylene production, naphtha, light diesel oil, etc. Raw material resources are facing an incre...

Claims

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Application Information

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IPC IPC(8): C07C7/167C07C5/09C07C11/04B01J23/75
CPCB01J23/002B01J23/75B01J35/1014B01J35/1019B01J35/1038B01J35/1042B01J2523/00C07C5/09C07C7/167C07C2523/75C07C11/04B01J2523/31B01J2523/842B01J2523/845B01J2523/48B01J2523/47B01J2523/22B01J2523/41Y02P20/52
Inventor 车春霞韩伟张峰苟尕莲钱颖梁玉龙谷丽芬景喜林马好文郭珺景丽杨珊珊王斌
Owner PETROCHINA CO LTD
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