Catalyst for preparing green olefin from green electricity methanol and method for preparing green olefin from green electricity methanol

Abstract

The invention relates to the technical field of chemical engineering, in particular to a catalyst for preparing green olefin from green electricity methanol and a method for preparing green olefin from green electricity methanol. The catalyst comprises the following components in parts by volume: 10-20 parts of benzoic acid, 30-40 parts of oleic acid and 40-60 parts of naphthenic acid. The catalyst disclosed by the invention comprises benzoic acid, oleic acid and naphthenic acid, and the dosage of each component is limited in a reasonable range value, so that each component plays a better synergistic effect, and when the catalyst is applied to a method for preparing green olefin from green methanol, the yield and production efficiency of olefin can be improved, and the production cost is reduced. And meanwhile, the method has relatively good economical efficiency and environmental friendliness.

Description

Technical Field

[0001] The present invention relates to the field of chemical technology, and in particular to a catalyst for preparing green olefins from green electricity methanol and a method for preparing green olefins from green electricity methanol. Background Art

[0002] With the continuous development of the chemical industry, olefin compounds have been widely used in the fields of petrochemicals, plastic manufacturing, medicine, agricultural chemicals, etc. Traditional olefin production methods mainly rely on petroleum or natural gas as raw materials, usually prepared by processes such as steam cracking. However, with the increase in global energy demand and the gradual depletion of oil resources, the supply of traditional petrochemical raw materials faces increasingly severe challenges. At the same time, the requirements for environmental protection and sustainable development are increasing, and there is an urgent need to find new alternative raw materials and more efficient and environmentally friendly olefin production processes.

[0003] Green methanol, as an important basic chemical, has a relatively abundant supply of resources and can be obtained through various channels such as natural gas, coal, and even biomass. Therefore, it has become one of the important raw materials in the chemical industry. In recent years, with the popularization of green chemistry and sustainable development concepts, the concept of green methanol has gradually become a focus of attention. Green methanol usually refers to green methanol extracted from renewable energy (such as wind power, solar energy) or from sustainable resources such as biomass and waste. This acquisition method can not only reduce dependence on traditional fossil fuels and reduce carbon emissions, but also promote circular economy and environmental protection.

[0004] The production process of green methanol has significant environmental advantages over the traditional green methanol production process. The raw materials of green methanol come from a variety of sources, including biomass conversion, waste resource utilization, and even production through water electrolysis and hydrogen production combined with CO2 capture technology (i.e., electricity-driven hydrocarbon chemistry). These methods not only help reduce greenhouse gas emissions, but also effectively achieve resource recycling. With the continuous advancement of technology, the production cost of green methanol has gradually decreased, and it has become an increasingly viable option to replace traditional fossil raw materials.

[0005] In recent years, the green electricity methanol to olefins (MTO) process has attracted widespread attention, especially when using green electricity methanol as raw material. This process is not only economical, but also can make full use of green electricity methanol, a low-cost and sustainable resource, providing a more environmentally friendly way to produce olefins.

[0006] At present, the technologies for methanol to olefins mainly include catalytic cracking and catalytic conversion. Traditional MTO technology usually uses acidic catalysts, such as ZSM-5 molecular sieve catalysts, to carry out methanol conversion reactions. However, these catalysts may suffer from catalyst poisoning and activity decline during the reaction, and the selectivity and stability of the catalysts are still technical problems that need to be solved urgently.

[0007] Therefore, how to improve the selectivity and yield of olefins in the methanol conversion process, simplify the process flow and reduce production costs has become a hot topic in current research. Summary of the invention

[0008] The present invention provides a catalyst for preparing green olefins from green electricity methanol and a method for preparing green olefins from green electricity methanol, which are used to solve the problems of low selectivity and low yield in the existing method for preparing olefins from methanol. The present invention can improve the yield and production efficiency of olefins by using a catalyst containing multiple components and optimized reaction conditions, and at the same time has good economy and environmental friendliness.

[0009] According to a first aspect of the present invention, the present invention provides a catalyst for preparing green olefins from green electricity methanol, which comprises 10-20 parts of benzoic acid, 30-40 parts of oleic acid and 40-60 parts of cyclohexane acid in parts by volume.

[0010] Furthermore, based on volume fractions, the composition comprises 15-20 parts of benzoic acid, 30-35 parts of oleic acid and 45-55 parts of cyclohexane acid.

[0011] According to the second aspect of the present invention, the present invention also provides a method for preparing green olefins from green electric methanol, using green electric methanol as raw material, and carrying out catalytic cracking reaction in a nitrogen environment under the action of the above-mentioned catalyst.

[0012] Furthermore, the catalyst is placed in a closed reactor, nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added to carry out a catalytic cracking reaction; after the catalytic cracking reaction is completed, the product is collected by condensation.

[0013] Furthermore, the temperature of the catalytic thermal cracking reaction is 600-850°C.

[0014] Preferably, the temperature of the catalytic thermal cracking reaction is 700-800°C.

[0015] Furthermore, the amount of the catalyst used is 1-3% of the mass of the green electric methanol.

[0016] Furthermore, the mass space velocity of adding green electricity methanol is 0.5-2.0h -1 .

[0017] Furthermore, the flow rate of the nitrogen is 50-100 ml / min.

[0018] Furthermore, the method comprises placing the catalyst in a closed reactor, introducing nitrogen and heating to a reaction temperature, and then adding green electric methanol to carry out a catalytic cracking reaction; after the catalytic cracking reaction is completed, the product is collected by condensation; The amount of the catalyst used is 1-3% of the mass of the green electric methanol; the temperature of the catalytic thermal cracking reaction is 600-850°C, preferably 700-800°C; the mass space velocity of the green electric methanol added is 0.5-2.0h -1 ; The flow rate of the nitrogen is 50-100ml / min Furthermore, the green electricity methanol conversion rate of the method is ≥95%; and the olefins include ethylene and propylene.

[0019] Beneficial effects of the present invention: The catalyst for preparing green olefins from green electricity methanol provided by the present invention includes benzoic acid, oleic acid and cyclohexane acid. By limiting the dosage of each component within a reasonable range, the components can exert a better synergistic effect. When applied to a method for preparing green olefins from green electricity methanol, the yield and production efficiency of the olefins can be improved, and the catalyst has good economy and environmental friendliness. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] As analyzed in the background art, the catalyst for preparing olefins from methanol in the prior art may suffer from problems such as catalyst poisoning and activity decay during the reaction process, and the selectivity and stability of the catalyst are poor.

[0022] In a first typical embodiment of the present invention, the present invention provides a catalyst for preparing green olefins from green electric methanol. According to some specific embodiments of the present invention, the catalyst comprises 10-20 parts of benzoic acid, 30-40 parts of oleic acid and 40-60 parts of cyclohexane acid by volume.

[0023] The catalyst of the present invention includes benzoic acid, oleic acid and cyclohexane acid. The acidic oily catalyst replaces the acidic molecular sieve catalyst with dual functions of carbon cation reaction and free radical thermal reaction commonly used in catalytic thermal cracking, which can reduce costs. Furthermore, the catalyst of the present invention limits the amount of each component to a reasonable range value, so that the components can play a better synergistic role, so that the catalyst will not have problems such as catalyst poisoning and activity decline during the reaction process, and has good selectivity and stability. When applied to the method of preparing green olefins from green electric methanol, it can improve the yield and production efficiency of olefins, and at the same time has good economy and environmental friendliness.

[0024] According to some specific embodiments of the present invention, the catalyst comprises 15-20 parts of benzoic acid, 30-35 parts of oleic acid and 45-55 parts of cyclohexane acid by volume. The catalyst obtained under the component conditions is applied to the method for preparing green olefins from green electricity methanol, which can more effectively improve the yield and production efficiency of olefins.

[0025] In a second typical embodiment of the present invention, the present invention also provides a method for preparing green olefins from green electric methanol. According to some specific embodiments of the present invention, the method uses green electric methanol as raw material, and carries out catalytic cracking reaction in a nitrogen environment under the action of the above-mentioned catalyst to obtain olefins.

[0026] The above catalyst is applied to the method of preparing green olefins from green electricity methanol. The process is simple, continuous production is possible, the olefin yield is high, and it has good prospects.

[0027] According to some specific embodiments of the present invention, the catalyst is placed in a closed reactor, nitrogen is introduced and the temperature is raised to the reaction temperature, and then green electric methanol is added at a certain mass space velocity to carry out a catalytic cracking reaction; after the catalytic cracking reaction is completed, the product is collected by condensation.

[0028] According to some specific embodiments of the present invention, the temperature of the catalytic thermal cracking reaction is 600-850°C.

[0029] Optionally, the temperature of the catalytic thermal cracking reaction may be 600°C, 650°C, 700°C, 750°C, 800°C or 850°C, etc., and may also be other values ​​within the above range, which is not limited here.

[0030] According to some specific embodiments of the present invention, the temperature of the catalytic thermal cracking reaction is 700-800°C. Temperature control plays a vital role in the catalytic thermal cracking reaction. It not only affects the yield and quality of the product, but also affects the efficiency of the reaction, the activity and life of the catalyst, and the choice of reaction path. Therefore, precise control of the reaction temperature is the key to achieving efficient catalytic thermal cracking. Under the above temperature conditions, the purpose of efficient catalytic thermal cracking can be achieved.

[0031] According to some specific embodiments of the present invention, the amount of the catalyst is 1-3% of the mass of the green electric methanol. The amount of catalyst plays a vital role in the catalytic thermal cracking reaction. It not only affects the reaction rate and product selectivity, but also affects the stability, regeneration of the catalyst and the efficiency and sustainability of the entire chemical production. Therefore, reasonable control of the amount of catalyst is of great significance for improving the efficiency and economic benefits of catalytic thermal cracking. The amount of catalyst within the above-mentioned mass percentage range can improve the efficiency of the catalytic thermal cracking reaction, and improve the yield and production efficiency of olefins.

[0032] Optionally, the amount of the catalyst used is 1%, 1.5%, 2%, 2.5% or 3% of the mass percentage of the green electric methanol mass, and of course it can also be other values ​​within the above range, which is not limited here.

[0033] According to some specific embodiments of the present invention, the mass space velocity of adding green electricity methanol is 0.5-2.0h -1 Mass space velocity is a key operating parameter in the process of preparing olefins from green electricity methanol, which has an important impact on the conversion rate, selectivity, catalyst stability and the economy of the entire process. By accurately controlling the mass space velocity, the reaction conditions can be optimized, the quality and yield of the product can be improved, and the production cost can be reduced.

[0034] Optionally, the mass space velocity of adding green electricity methanol can be 0.5h -1 , 1h -1 , 1.5h -1 or 2.0h -1 Of course, it can also be other values ​​within the above range and is not limited here.

[0035] According to some specific embodiments of the present invention, the flow rate of the nitrogen is 50-100 ml / min. As an inert gas, the flow rate of nitrogen can affect the flow characteristics of the gas in the reactor, thereby affecting the contact efficiency between the reactants and the catalyst. An appropriate nitrogen flow rate helps to maintain a uniform distribution of the gas in the reactor, ensures effective contact between the reactants and the catalyst, and thus improves the reaction rate and the activity of the catalyst.

[0036] Optionally, the flow rate of the nitrogen can be 50ml / min, 55ml / min, 60ml / min, 65ml / min, 70ml / min, 75ml / min, 80ml / min, 85ml / min, 90ml / min, 95ml / min or 100ml / min, etc., and of course it can also be other values ​​within the above range, which is not limited here, and is preferably 60-80ml / min.

[0037] According to some specific embodiments of the present invention, the green electricity methanol conversion rate of the method is ≥95%, and the olefins include ethylene and propylene.

[0038] In some specific embodiments, ethylene accounts for 50-70% of the total mass of the olefins, and propylene accounts for 20-50% of the total mass of the olefins.

[0039] In some specific embodiments, the green electricity methanol conversion rate of the method is ≥97%.

[0040] Example 1A The present embodiment provides a catalyst for preparing green olefins from green electricity methanol, which is composed of the following components in parts by volume: 15 parts of benzoic acid, 35 parts of oleic acid and 50 parts of cyclohexane acid.

[0041] The preparation method of the catalyst of this embodiment is as follows: benzoic acid, oleic acid and cyclohexane acid are added into a stirring container according to a proportion, and stirred for 30 minutes until uniform, so as to obtain a catalyst for preparing green olefins from green electric methanol.

[0042] Example 2A The present embodiment provides a catalyst for preparing green olefins from green electricity methanol, which is composed of the following components in parts by volume: 20 parts of benzoic acid, 40 parts of oleic acid and 40 parts of cyclohexane acid.

[0043] The preparation method of the catalyst of this embodiment is as follows: benzoic acid, oleic acid and cyclohexane acid are added into a stirring container according to a proportion, and stirred for 30 minutes until uniform, so as to obtain a catalyst for preparing green olefins from green electric methanol.

[0044] Example 3A The present embodiment provides a catalyst for preparing green olefins from green electricity methanol, which is composed of the following components in parts by volume: 10 parts of benzoic acid, 30 parts of oleic acid and 60 parts of cyclohexane acid.

[0045] The preparation method of the catalyst of this embodiment is as follows: benzoic acid, oleic acid and cyclohexane acid are added into a stirring container according to a proportion, and stirred for 30 minutes until uniform, so as to obtain a catalyst for preparing green olefins from green electric methanol.

[0046] Example 4A The present embodiment provides a catalyst for preparing green olefins from green electricity methanol, which is composed of the following components in parts by volume: 13 parts of benzoic acid, 32 parts of oleic acid and 55 parts of cyclohexane acid.

[0047] The preparation method of the catalyst of this embodiment is as follows: benzoic acid, oleic acid and cyclohexane acid are added into a stirring container according to a proportion, and stirred for 30 minutes until uniform, so as to obtain a catalyst for preparing green olefins from green electric methanol.

[0048] Example 5A The present embodiment provides a catalyst for preparing green olefins from green electricity methanol, which is composed of the following components in parts by volume: 17 parts of benzoic acid, 33 parts of oleic acid and 50 parts of cyclohexane acid.

[0049] The preparation method of the catalyst of this embodiment is as follows: benzoic acid, oleic acid and cyclohexane acid are added into a stirring container according to a proportion, and stirred for 30 minutes until uniform, so as to obtain a catalyst for preparing green olefins from green electric methanol.

[0050] Comparative Example 1A This comparative example provides a catalyst for preparing green olefins from green electric methanol, which is composed of the following components in parts by volume: 5 parts of benzoic acid, 25 parts of oleic acid and 70 parts of cyclohexane acid.

[0051] The preparation method of the catalyst of this embodiment is as follows: benzoic acid, oleic acid and cyclohexane acid are added into a stirring container according to a proportion, and stirred for 30 minutes until uniform, so as to obtain a catalyst for preparing green olefins from green electric methanol.

[0052] Example 1B-1 This embodiment provides a method for preparing green olefins using green electricity methanol, comprising the following steps: (1) The catalyst of Example 1A is placed in a closed reaction tube.

[0053] (2) After nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added at a certain mass space velocity to carry out catalytic cracking reaction.

[0054] The temperature of the catalytic thermal cracking reaction is 800°C.

[0055] The amount of catalyst used is 1.5% of the mass of green electricity methanol.

[0056] The flow rate of nitrogen is 60ml / min, and the mass space velocity of green electric methanol is 1.0h -1 .

[0057] (3) After the catalytic cracking reaction is completed, the product is collected by condensation.

[0058] The product obtained in this example was detected by gas chromatography: the green electricity methanol conversion rate was 99.05%, the ethylene mass fraction was 67.5%, and the propylene mass fraction was 23%.

[0059] Example 1B-2 This embodiment provides a method for preparing green olefins using green electricity methanol, comprising the following steps: (1) The catalyst of Example 1A is placed in a closed reaction tube.

[0060] (2) After nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added at a certain mass space velocity to carry out catalytic cracking reaction.

[0061] The temperature of the catalytic thermal cracking reaction is 800°C.

[0062] The dosage of catalyst is 1% of the mass of green electricity methanol.

[0063] The flow rate of nitrogen is 60ml / min, and the mass space velocity of green electric methanol is 1.0h -1 .

[0064] (3) After the catalytic cracking reaction is completed, the product is collected by condensation.

[0065] The product obtained in this example was detected by gas chromatography: the green electricity methanol conversion rate was 98%, the ethylene mass fraction was 59%, and the propylene mass fraction was 37%.

[0066] Example 1B-3 This embodiment provides a method for preparing green olefins using green electricity methanol, comprising the following steps: (1) The catalyst of Example 1A is placed in a closed reaction tube.

[0067] (2) After nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added at a certain mass space velocity to carry out catalytic cracking reaction.

[0068] The temperature of the catalytic thermal cracking reaction is 800°C.

[0069] The amount of catalyst used is 3% of the mass of green electricity methanol.

[0070] The flow rate of nitrogen is 60ml / min, and the mass space velocity of green electric methanol is 1.0h -1 .

[0071] (3) After the catalytic cracking reaction is completed, the product is collected by condensation.

[0072] The product obtained in this example was detected by gas chromatography: the green electricity methanol conversion rate was 97%, the ethylene mass fraction was 63%, and the propylene mass fraction was 33%.

[0073] Example 1B-4 This embodiment provides a method for preparing green olefins using green electricity methanol, comprising the following steps: (1) The catalyst of Example 1A is placed in a closed reaction tube.

[0074] (2) After nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added at a certain mass space velocity to carry out catalytic cracking reaction.

[0075] The temperature of the catalytic thermal cracking reaction is 600°C.

[0076] The amount of catalyst used is 2% of the mass of green electricity methanol.

[0077] The flow rate of nitrogen is 60ml / min, and the mass space velocity of green electric methanol is 1.0h -1 .

[0078] (3) After the catalytic cracking reaction is completed, the product is collected by condensation.

[0079] The product obtained in this example was detected by gas chromatography: the green electricity methanol conversion rate was 91%, the ethylene mass fraction was 50%, and the propylene mass fraction was 45%.

[0080] Example 1B-5 This embodiment provides a method for preparing green olefins using green electricity methanol, comprising the following steps: (1) The catalyst of Example 1A is placed in a closed reaction tube.

[0081] (2) After nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added at a certain mass space velocity to carry out catalytic cracking reaction.

[0082] The temperature of the catalytic thermal cracking reaction is 850°C.

[0083] The amount of catalyst used is 2.5% of the mass of green electricity methanol.

[0084] The flow rate of nitrogen is 60ml / min, and the mass space velocity of green electric methanol is 1.0h -1 .

[0085] (3) After the catalytic cracking reaction is completed, the product is collected by condensation.

[0086] The obtained product was detected by gas chromatography: the green electricity methanol conversion rate was 89%, the ethylene mass fraction was 56%, and the propylene mass fraction was 40%.

[0087] Example 1B-6 This embodiment provides a method for preparing green olefins using green electricity methanol, comprising the following steps: (1) The catalyst of Example 1A is placed in a closed reaction tube.

[0088] (2) After nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added at a certain mass space velocity to carry out catalytic cracking reaction.

[0089] The temperature of the catalytic thermal cracking reaction is 800°C.

[0090] The amount of catalyst used is 1.5% of the mass of green electricity methanol.

[0091] The flow rate of nitrogen is 60ml / min, and the mass space velocity of green electric methanol is 0.5h -1.

[0092] (3) After the catalytic cracking reaction is completed, the product is collected by condensation.

[0093] The product obtained in this example was detected by gas chromatography: the green electricity methanol conversion rate was 97%, the ethylene mass fraction was 56%, and the propylene mass fraction was 33%.

[0094] Example 1B-7 This embodiment provides a method for preparing green olefins using green electricity methanol, comprising the following steps: (1) The catalyst of Example 1A is placed in a closed reaction tube.

[0095] (2) After nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added at a certain mass space velocity to carry out catalytic cracking reaction.

[0096] The temperature of the catalytic thermal cracking reaction is 800°C.

[0097] The amount of catalyst used is 1.5% of the mass of green electricity methanol.

[0098] The flow rate of nitrogen is 60ml / min, and the mass space velocity of green electric methanol is 2.0h -1 .

[0099] (3) After the catalytic cracking reaction is completed, the product is collected by condensation.

[0100] The product obtained in this example was detected by gas chromatography: the green electricity methanol conversion rate was 94%, the ethylene mass fraction was 50%, and the propylene mass fraction was 38%.

[0101] Example 1B-8 This embodiment provides a method for preparing green olefins using green electricity methanol, comprising the following steps: (1) The catalyst of Example 1A is placed in a closed reaction tube.

[0102] (2) After nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added at a certain mass space velocity to carry out catalytic cracking reaction.

[0103] The temperature of the catalytic thermal cracking reaction is 800°C.

[0104] The amount of catalyst used is 1.5% of the mass of green electricity methanol.

[0105] The flow rate of nitrogen is 50ml / min, and the mass space velocity of green electric methanol is 1h -1 .

[0106] (3) After the catalytic cracking reaction is completed, the product is collected by condensation.

[0107] The product obtained in this example was detected by gas chromatography: the green electricity methanol conversion rate was 88%, the ethylene mass fraction was 48%, and the propylene mass fraction was 42%.

[0108] Example 1B-9 This embodiment provides a method for preparing green olefins using green electricity methanol, comprising the following steps: (1) The catalyst of Example 1A is placed in a closed reaction tube.

[0109] (2) After nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added at a certain mass space velocity to carry out catalytic cracking reaction.

[0110] The temperature of the catalytic thermal cracking reaction is 800°C.

[0111] The amount of catalyst used is 1.5% of the mass of green electricity methanol.

[0112] The flow rate of nitrogen is 100 ml / min, and the mass space velocity of green methanol is 1 h -1 .

[0113] (3) After the catalytic cracking reaction is completed, the product is collected by condensation.

[0114] The product obtained in this example was detected by gas chromatography: the green electricity methanol conversion rate was 85%, the ethylene mass fraction was 40%, and the propylene mass fraction was 52%.

[0115] Example 2B This embodiment provides a method for preparing green olefins using green electricity methanol, comprising the following steps: (1) The catalyst of Example 2A is placed in a closed reaction tube.

[0116] (2) After nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added at a certain mass space velocity to carry out catalytic cracking reaction.

[0117] The temperature of the catalytic thermal cracking reaction is 750°C.

[0118] The amount of catalyst used is 1% of the mass of green electricity methanol.

[0119] The flow rate of nitrogen is 80ml / min, and the mass space velocity of green methanol is 2.0h -1 .

[0120] (3) After the catalytic cracking reaction is completed, the product is collected by condensation.

[0121] The product obtained in this example was detected by gas chromatography: the conversion rate was 97.10%, the mass fraction of ethylene was 50.3%, and the mass fraction of propylene was 44.8%.

[0122] Comparative Example 1B This comparative example provides a method for preparing olefins from green electricity methanol, which is different from Example 1B-1 in that the catalyst of Comparative Example 1A is used instead of the catalyst of Example 1A.

[0123] The product obtained in this comparative example was detected by gas chromatography: conversion rate 53%, ethylene mass fraction 31%, propylene mass fraction 12%.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A catalyst for preparing green olefins from green electricity methanol, characterized in that: Calculated by volume, it includes 10-20 parts of benzoic acid, 30-40 parts of oleic acid and 40-60 parts of cyclohexane acid.

2. The catalyst for preparing green olefins from green electricity methanol according to claim 1, characterized in that: Calculated by volume, it includes 15-20 parts of benzoic acid, 30-35 parts of oleic acid and 45-55 parts of cyclohexane acid.

3. A method for preparing green olefins from green electricity methanol, characterized in that: Using green electricity methanol as raw material, a catalytic cracking reaction is carried out in a nitrogen environment under the action of the catalyst described in claim 1 or 2.

4. The method according to claim 3, characterized in that The catalyst is placed in a closed reactor, nitrogen is introduced and the temperature is raised to the reaction temperature, and then green electric methanol is added to carry out a catalytic cracking reaction; after the catalytic cracking reaction is completed, the product is collected by condensation.

5. The method according to claim 4, characterized in that The temperature of the catalytic thermal cracking reaction is 600-850°C, preferably 700-800°C.

6. The method according to claim 4 or 5, characterized in that: The amount of the catalyst used is 1-3% of the mass of the green electric methanol.

7. The method according to any one of claims 4 to 6, characterized in that: The mass space velocity of adding green electricity methanol is 0.5-2.0h -1 .

8. The method according to any one of claims 4 to 7, characterized in that: The flow rate of the nitrogen gas is 50-100 ml / min.

9. The method according to claim 3, characterized in that: The catalyst is placed in a closed reactor, nitrogen is introduced, the temperature is raised to the reaction temperature, and then green electric methanol is added to perform a catalytic cracking reaction; after the catalytic cracking reaction is completed, the product is collected by condensation; The amount of the catalyst used is 1-3% of the mass of the green electric methanol; the temperature of the catalytic thermal cracking reaction is 600-850°C, preferably 700-800°C; the mass space velocity of the green electric methanol added is 0.5-2.0h -1 ; The flow rate of the nitrogen is 50-100ml / min.

10. The method according to claim 3, characterized in that The green electricity methanol conversion rate of the method is ≥95%; the olefins include ethylene and propylene.