Butter inhibitor for ethylene unit alkaline washing tower

A technology of butter inhibitor and ethylene device, which is applied in the direction of treatment equipment corrosion/scaling inhibition, petroleum industry, hydrocarbon oil treatment, etc. It can solve the problems of butter inhibition and the limitation of rapid dispersion and cleaning effect, and achieve the purpose of inhibiting the formation of butter Effect

Inactive Publication Date: 2010-09-22
浙江杭化科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limitations on butter inhibitio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Add 160g of sodium metabisulfite, 280g of aminomethylpropanol, 120g of sodium lignoxanthate, 110g of sodium nitrite, and 330g of deionized water into a container, heat and stir to mix evenly, then cool and filter to obtain a butter inhibitor, code-named HK-A.

[0044] The HK-A butter inhibitor in Example 1 is applied to the alkali washing tower of the ethylene simulation device, the raw material for cracking is naphtha, and the total yield of ethylene, propylene and butadiene in the cracking gas is 48.5%, and the hydrogen in the alkali washing tower The concentration of sodium oxide is 7.5%, and the inhibitor is added to the circulating lye at one time, and the addition amount is 50ppm (relative to the total amount of cracked gas). The device rotates continuously for 2 hours to measure the weight of butter in the lye. And compared with the amount of butter produced when no butter inhibitor was added, the inhibition rate of the butter inhibitor was calculated.

[0045]...

Embodiment 2

[0048] 160g carbohydrazide, 270g diethylenetriamine, 130g sodium lignosulfonate, 120g sodium benzoate, 320g deionized water, others are with embodiment 1.

Embodiment 3

[0050] 160g isopropyl hydroxylamine, 270g dimethylaminoethanol, 130g ammonium lignosulfonate, 100g sodium nitrite, 340g deionized water, and others are the same as in Example 1.

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PUM

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Abstract

The invention relates to a butter inhibitor used for an ethylene unit alkaline washing tower. Problems of the background technology are solved, so the butter inhibitor has the performance of oxidation resistance, polymerization inhibition, cleanness, dispersion, metallic ion passivation and a better inhibition effect. The butter inhibitor is prepared from the following raw materials of: 1 to 30 percent of antioxidant, 5 to 40 percent of polymerization retarder, 2 to 30 percent of dispersant, 5 to 25 percent of metallic ion passivating agent and the balance of solvent; and the butter inhibitor is prepared by heating, uniformly mixing and cooling the materials.

Description

[0001] [0002] Involved areas [0003] The invention relates to the field of organic chemistry, in particular to a butter inhibitor used in an alkali washing tower of an ethylene plant. Background technique [0004] Pyrolysis gas will produce a large amount of butter during the alkali washing process, which will affect the normal operation and alkali washing effect of the alkali washing tower, and consume a large amount of alkali liquor. Phenomenon. In addition, the waste lye containing a large amount of butter is discharged, which seriously affects the environment. [0005] It is generally believed that there are two main reasons for the formation of butter in the alkali washing system: one is that the pyrolysis gas is condensed during the alkali washing process or the dienes or other unsaturated hydrocarbons dissolved in the alkali solution are easy to form under the action of trace oxygen and metal ions Free radicals provide initiation conditions for the formation of cr...

Claims

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Application Information

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IPC IPC(8): C10G75/04C10G70/06
Inventor 林向阳熊强华李有金沈勤梅林龙平徐熳红楼继浩
Owner 浙江杭化科技股份有限公司
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