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A method for separating compressor oil and butyraldehyde

A technology for compressors and screw compressors, which is used in the separation/purification of carbonyl compounds, organic chemistry, lubricating compositions, etc., and can solve problems such as the deterioration of compressor oil quality, the increase in the use cost of exhaust compressors, and pollution.

Active Publication Date: 2019-02-01
ZHANGJIAGANG HUACHANG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, during the pressurization process of the tail gas compressor, the butyraldehyde component contained in the low-pressure tail gas is easy to condense, polluting the oil of the tail gas compressor, reducing the quality of the compressor oil, reducing the lubrication effect, and even affecting the tail gas compressor The operating capacity of the compressor will be increased, and the wear of the compressor will be increased until the exhaust compressor is damaged.
In the actual driving process, in order to ensure the operation effect of the compressor, the oil of the exhaust gas compressor had to be replaced frequently, which caused a sharp increase in the use cost of the exhaust gas compressor, seriously affected the stable operation of the recovery device, and caused a lot of economic losses to the enterprise. In addition, a large amount of waste The production of engine oil also seriously pollutes the environment

Method used

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  • A method for separating compressor oil and butyraldehyde

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The oil-injected screw compressor is used, the compressed gas temperature is 90°C, and the oil injection temperature at the expansion valve is kept stable at 60°C, the compressor oil pipeline and equipment need to be kept at 60°C, and the low-pressure gas enters the compressor to heat up the gas liquefied and separated from the compressor oil.

Embodiment 2

[0015] The oil-injected screw compressor is used, the compressed gas temperature is 85°C, and the oil injection temperature at the expansion valve is kept stable at 65°C, the compressor oil pipeline and equipment need to be kept at 65°C, and the low-pressure gas enters the compressor to heat up the gas liquefied and separated from the compressor oil.

Embodiment 3

[0017] The low-pressure tail gas of a domestic 250,000-ton butyl-octyl alcohol project adopts the technology provided by the invention, and the amount of liquid in the exhaust gas is less than 5ppm. Adopt plasma atomic emission spectrometry (ICP) to analyze and detect the metal elements in the machine oil. After adopting the technology provided by the invention, when the service time of the machine oil is 200% of the original time, the mass fraction of the iron element in the oil is only 4.5 μg / g, while the copper , aluminum, chromium, nickel, silver, tin, molybdenum and other elements are all detected, from which it can be judged that the wear of the compressor is slight, which is obviously improved compared with the original.

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Abstract

The invention provides a method for separating compressor oil and butyraldehyde in a butyl octanol production device. The method comprises the following step: pressurizing three low-pressure tail gas streams from the butyl octanol device by using an oil-injection screw compressor while heating to gasify a small amount of liquid butyraldehyde in the tail gas, thereby separating the compressor oil and butyraldehyde. The method has the advantages of simple technique and low operating cost, and is simple and effective.

Description

technical field [0001] The invention relates to the chemical industry, in particular to a method for separating compressor oil and butyraldehyde in a butanol production device. Background technique [0002] Butanol and octanol are commonly called butanol because they can be produced by hydroxyl synthesis in the same device. Butanol and octanol are colorless, transparent, flammable oily liquids with special odors, can form azeotropes with water and various compounds, and are moderately toxic. At present, the newly-built butyl-octanol plants all over the world adopt the modified rhodium-based catalyst low-pressure oxo synthesis method, using propylene, synthesis gas and hydrogen as raw materials, generating mixed butyraldehyde under the action of the catalyst, separating the catalyst for recycling, and separating normal / Isobutyraldehyde is hydrogenated to generate n-butanol and isobutanol, which are separated by rectification to obtain n-butanol and isobutanol products; n-b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/78C07C47/02C10M175/00
CPCC07C45/78C10M175/00C07C47/02
Inventor 陈清胡波李长胜吴秀艳
Owner ZHANGJIAGANG HUACHANG NEW MATERIAL TECH CO LTD