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Method for inhibiting butter formation from oxygenates to olefins and butter inhibitor composition

A butter inhibitor and compound technology, which is applied in hydrocarbons, chemical instruments and methods, and ethylene production, can solve the problems of unsatisfactory dispersion effect of butter and unstable inhibition effect, and achieve reduced equipment corrosion, good dispersion, and Solve the effect of more butter

Active Publication Date: 2022-07-08
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 intended to illustrate the inhibitor composition of the present invention and the method of inhibiting the production of butter.

[0041] The product gas flow rate b at the inlet of the alkaline washing tower of the MTO alkaline washing system is 90 t / h, and the mass content of acetaldehyde is 100 ppm. The formula in parts by mass in the agent 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. Deionized water, sodium sulfite, ethanolamine, isopropylamine and sodium dodecylbenzenesulfonate were sequentially added to the stirring tank, and the butter inhibitor was obtained after stirring at 25° C. for 2 hours.

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

Embodiment 2

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

[0047] The product gas flow rate b at the inlet of the alkaline washing tower of the MTO alkaline washing system is 90 t / h, and the mass content of acetaldehyde is 100 ppm. 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 . Deionized water, sodium sulfite, ethanolamine, diethanolamine, triethanolamine and sodium dodecylbenzenesulfonate were added to the stirring tank in sequence, and after stirring at 25° C. for 2 hours, the butter inhibitor was obtained 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 o...

Embodiment 3

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

[0052] The product gas flow rate b at the inlet of the alkaline washing tower of the MTO alkaline washing system is 90 t / h, and the mass content of acetaldehyde is 100 ppm. 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 . Deionized water, sodium sulfite, ethanolamine, diethanolamine, triethanolamine and sodium dodecylbenzenesulfonate were added to the stirring tank in sequence, and after stirring at 25° C. for 2 hours, the butter inhibitor was obtained, 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...

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Abstract

The invention relates to the technical field of petrochemical industry, and discloses a method for inhibiting the production of butter in the production of olefins from oxygenated compounds and a butter inhibitor composition. The method comprises continuously injecting an oxygenate-to-olefins butter inhibitor composition on a circulating lye line of a caustic washing tower of an oxygenate-to-olefin separation unit to inhibit the production of butter; wherein, the expression of the injection amount Q is: Q=A(b×c); the value of A is 6-12, b is the product gas flow rate at the inlet of the alkali scrubbing tower for preparing olefins from oxygen-containing compounds, and c is the acetaldehyde content in the product gas. The method can inhibit the production of butter in the alkaline washing tower, has a good dispersing effect on the formed butter, reduces equipment corrosion, can also reduce the mass content of polymers in the alkaline solution, and can reduce the pressure difference of the alkaline washing tower. A good technical effect has been 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 production of olefins from oxygenates and a butter inhibitor composition. Background technique [0002] Methanol-To-Olefin (MTO for short) refers to the production of methanol from natural gas or coal as raw material through synthesis gas, and then methanol generates low-carbon olefins such as ethylene and propylene under the action of a catalyst. Its products have been proved to be fully applicable. In the production of polyolefins 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, the production of alkaline scrubber butter is generally reduced by optimizing process conditions and adding butter inhibitor...

Claims

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Application Information

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Patent Type & Authority Patents(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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