Method for inhibiting production of grease in oxygen-containing compound-to-olefin process and grease inhibitor composition

A technology of butter inhibitors and compounds, which is applied in the field of inhibiting the production of butter in olefins from oxygenated compounds, and the field of butter inhibitor compositions. The effect of equipment corrosion, good technical effect

Active Publication Date: 2021-01-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a method for inhibiting the formation of butter in the production of olefins from oxygenated compounds and butter Inhibitor composition, the method can suppress the amount of butter produced in the alkali washing tower, has a good dispersion effect on the produced butter, reduces equipment corrosion, can also reduce the polymer mass content in the alkali solution, and can reduce the amount of butter in the alkali washing tower. The pressure difference has achieved good technical results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This example is to illustrate the inhibitor composition of the present invention and the method for inhibiting butter production.

[0041] The air flow rate b of the inlet product of the alkali washing tower of the MTO alkali washing system is 90t / h, and the mass content of acetaldehyde is 100ppm. The formula in parts by mass is: 30 parts by weight of ethanolamine, 30 parts by weight of isopropylamine, 15 parts by weight of sodium sulfite, 25 parts by weight of sodium dodecylbenzenesulfonate, and 100 parts by weight of deionized water. Add deionized water, sodium sulfite, ethanolamine, isopropylamine and sodium dodecylbenzenesulfonate to the stirred tank in sequence, and stir at 25°C for 2 hours to obtain the butter inhibitor.

[0042] According to the expression Q=A(b×c) of the injection amount Q of the butter inhibitor composition, the value of A is adjusted so that the injection amount of the butter inhibitor is 80kg / h.

[0043] The device was operated for 150 hours...

Embodiment 2

[0046] This example is to illustrate the inhibitor composition of the present invention and the method for inhibiting butter production.

[0047] The air flow rate b of the inlet product of the alkali washing tower of the MTO alkali washing system is 90t / h, and the mass content of acetaldehyde is 100ppm. In the agent, the formula in parts by mass is: 20 parts by weight of ethanolamine, 10 parts by weight of diethanolamine, 10 parts by weight of triethanolamine, 4 parts by weight of sodium sulfite, 12 parts by weight of sodium dodecylbenzenesulfonate, 60 parts by weight of deionized water . Add deionized water, sodium sulfite, ethanolamine, diethanolamine, triethanolamine and sodium dodecylbenzenesulfonate in turn to the stirred tank, and stir at 25°C for 2 hours to obtain the butter inhibitor with a pH value of 11.

[0048] According to the expression Q=A(b×c) of the injection amount Q of the butter inhibitor composition, adjust the value of A, make the filling amount of the ...

Embodiment 3

[0051] This example is to illustrate the inhibitor composition of the present invention and the method for inhibiting butter production.

[0052] The air flow rate b of the inlet product of the alkali washing tower of the MTO alkali washing system is 90t / h, and the mass content of acetaldehyde is 100ppm. In the agent, the formula in parts by mass is: 15 parts by weight of ethanolamine, 5 parts by weight of diethanolamine, 15 parts by weight of triethanolamine, 1 part by weight of sodium sulfite, 25 parts by weight of sodium dodecylbenzenesulfonate, 100 parts by weight of deionized water . Add deionized water, sodium sulfite, ethanolamine, diethanolamine, triethanolamine, and sodium dodecylbenzenesulfonate to the stirred tank in turn, and stir at 25°C for 2 hours to obtain the butter inhibitor with a pH value of 12.8.

[0053] According to the expression Q=A(b×c) of the injection amount Q of the butter inhibitor composition, adjust the value of A, make the filling amount of th...

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Abstract

The invention relates to the technical field of petrochemical engineering, and discloses a method for inhibiting production of grease in oxygen-containing compound-to-olefin process and a grease inhibitor composition. The method comprises the following steps: continuously injecting the grease inhibitor composition for theoxygen-containing compound-to-olefin process into a circulating alkali liquorline of an alkali washing tower of an oxygen-containing compound-to-olefin separation unit so as to inhibit the generation of grease, wherein the expression of the injection amount Q is Q = A (b * c), the value of A is 6-12, b is the flow of the product gas at the inlet of the oxygen-containing compound-to-olefin alkaline washing tower, and c is the content of acetaldehyde in the product gas. Byadopting the method, the generation amount of the grease in the alkaline washing tower can be inhibited, the generated grease has a good dispersion effect, the corrosion to equipment is reduced, the mass content of polymers in alkaline liquor can be reduced, the pressure difference of the alkaline washing tower can be reduced, and a better technical effect is achieved.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a method for inhibiting the production of butter in the process of producing olefins from oxygen-containing compounds and a butter inhibitor composition. Background technique [0002] Methanol-to-Olefin (MTO for short) refers to the technology of producing methanol from natural gas or coal through synthesis gas, and then producing low-carbon olefins such as ethylene and propylene from methanol under the action of a catalyst. Its products have been proved to be fully applicable Used in the production of polyolefin and other products. MTO technology has opened up a new process route for producing chemical products from unconventional petroleum resources, and has become the research focus of olefin synthesis from unconventional petroleum resources. [0003] In industry, measures such as optimizing process conditions and adding butter inhibitors are generally used to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/00C07C7/20C07C11/04C07C11/06
CPCC07C7/00C07C7/20C07C11/04C07C11/06Y02P30/40
Inventor 王洪涛钟思青齐国祯金永明
Owner CHINA PETROLEUM & CHEM CORP
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