Ethylene apparatus caustic wash tower butter inhibitor and use method thereof

A butter inhibitor and ethylene device technology, applied in chemical instruments and methods, chemical change-inhibiting compositions, organic chemistry, etc., can solve problems such as ineffective effects, prolong operation period, reduce environmental pollution, and achieve significant economic benefits and the effect of social benefits

Inactive Publication Date: 2009-01-21
北京斯伯乐科学技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Documents (see "Ethylene Industry" 2001, 13 (4): 51-53.) have reported the industrial trial situation of domestic butter inhibitor HK-1312, but documents (see "Spectrum Laboratory...

Method used

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  • Ethylene apparatus caustic wash tower butter inhibitor and use method thereof
  • Ethylene apparatus caustic wash tower butter inhibitor and use method thereof
  • Ethylene apparatus caustic wash tower butter inhibitor and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 19

[0023] The alkali scrubber butter inhibitor of example 1 is applied to the alkali scrubber simulation device of the ethylene plant, wherein the cracking raw material is naphtha, and the total yield of ethylene, propylene and butadiene in the cracked gas is 51.4%, and the simulated alkali scrubber is weak The concentration of lye (NaOH solution) in the alkali section is 2%, and the concentration of lye (NaOH solution) in the strong alkali section is 5%. The butter inhibitor is continuously injected in the strong and weak alkali circulation line by using an electromagnetic pump, and the injection concentration is 500ppm. After the device has been running for 24 hours, the COD value of the lye in the weak base section is 12459mg / L using the test method of GB8978-1996.

Embodiment 20

[0025] The alkali scrubber butter inhibitor of example 2 is applied to the alkali scrubber simulation device of the ethylene plant, wherein the cracking raw material is naphtha, and the total yield of ethylene, propylene and butadiene in the cracked gas is 51.4%, and the simulated alkali scrubber is weak The concentration of lye (NaOH solution) in the alkali section is 2%, the concentration of lye (NaOH solution) in the strong alkali section is 5%, and the butter inhibitor is continuously injected in the strong and weak alkali circulation line by using an electromagnetic pump, and the injection concentration is 450ppm. After the device has been running for 24 hours, the COD value of the lye in the weak base section is tested by the test method of GB8978-1996 to be 13001mg / L.

Embodiment 21

[0027] The alkali scrubber butter inhibitor of example 3 is applied to the alkali scrubber simulation device of the ethylene plant, wherein the cracking raw material is naphtha, and the total yield of ethylene, propylene and butadiene in the cracked gas is 51.4%, and the simulated alkali scrubber is weak The concentration of lye (NaOH solution) in the alkali section is 2%, and the concentration of lye (NaOH solution) in the strong alkali section is 5%. The butter inhibitor is continuously injected into the strong and weak alkali circulation lines by using an electromagnetic pump, and the injection concentration is 400ppm. After the device has been running for 24 hours, the COD value of the lye in the weak base section is 13577mg / L using the test method of GB8978-1996.

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PUM

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Abstract

The invention relates to a grease inhibitor for a caustic scrubbing tower of an ethylene plant and a method for using the same. The grease inhibitor consists of an alkylol amine compound, a hydrazide compound and an alkylamine compound. Moreover, the grease inhibitor not only overcomes the disadvantages of the prior inhibitor of high production cost, great toxicity and instable inhibition effect, but also effectively controls the output of grease inside the caustic scrubbing tower; meanwhile, the grease inhibitor reduces the discharge of waste lye and the consumption of fresh lye, and lightens the pressure on treating waste lye and environmental pollution caused by the grease.

Description

Technical field: [0001] The invention relates to a butter inhibitor of an ethylene plant alkali washing tower and a using method thereof. Background technique: [0002] The alkali washing tower of the ethylene plant is an essential key equipment in the ethylene production process. Before the cracked gas enters the alkali washing tower, it contains more acidic substances, such as CO 2 、H 2 S et al. These acids, if not removed, can cause catalyst poisoning and contaminate ethylene during ethylene polymerization. Therefore, the pyrolysis gas must be washed with alkali. Ethylene production units are generally equipped with amine washing and alkali washing systems. In order to save alkali consumption and reduce the discharge of waste alkali, H 2 S and CO 2 Wait for the acid gas to drop to about 30ppm, and then wash the remaining acid gas to the content required by the subsequent section through alkali washing. Industrial production practice shows that cracking gas will pro...

Claims

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Application Information

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IPC IPC(8): C07C11/04C07C7/20C09K15/20
Inventor 刘宽胜王秀芬王彦斌刘树青高志礼何宏晓裴浩侯金顺刘志清
Owner 北京斯伯乐科学技术研究院
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