Super-high-pressure ethylene compressor oil and preparation method thereof

A compressor oil and ultra-high pressure technology, applied in the field of lubricating oil, can solve problems such as increased operating costs, ethylene gas leakage, thinner oil film thickness, etc., to achieve good thermal oxidation stability and lubricity, low carbon deposition tendency, low biotoxic effects

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ethylene gas is a kind of hydrocarbon gas. According to the principle of similar miscibility, it is compatible with the usual thickened white oil or polyisobutylene compressor oil, so that the oil is diluted and the viscosity is reduced, so that the thickness of the oil film is thinned, resulting in the cylinder being damaged. Wear and tear, the oil consumption of the compressor will increase, and the operating cost will increase. In addition, the seal will not be tight enough to cause ethylene gas leakage, which will cause the efficiency of the compressor to decrease. In severe cases, it will cause the unit to shut down and cause great hidden dangers.

Method used

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  • Super-high-pressure ethylene compressor oil and preparation method thereof

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preparation example Construction

[0030] The present invention also provides a preparation method of ultra-high pressure ethylene compressor oil, comprising the steps of:

[0031] Step a) Send the polyether synthetic oil into the blending kettle with a gear pump, evacuate, stir, heat, and raise the temperature to 80°C-95°C;

[0032] Step b) Add antioxidant and antirust agent to the polyether synthetic oil in step a), continue to heat up to 100°C to 135°C, preferably dehydrate at -0.09MPa to -0.07MPa, and then cool down to below 80°C , stop pumping and stirring;

[0033] Step c) filter the oil product obtained in step b), the specific filtration process is: take out a small amount of the oil product obtained in step b), add filter aid to stir, and carry out circulating filtration, so that the filter aid forms a filter in the filter machine. After the cake is finished, the remaining oil in the kettle is circulated and filtered until the oil is clear and transparent without mechanical impurities, and oil-gas lub...

Embodiment 1

[0035] Step a) Send polyether NPE-105 with a weight percentage of 93% into the blending kettle with a gear pump, evacuate, stir, heat, and raise the temperature to 85°C;

[0036] Step b) Add 2% of dialkyldiphenylamine and 5% of T702 (synthetic sodium sulfonate) to the polyether synthetic oil in step a), continue to heat up to 105°C, dehydrate at -0.08MPa, and then cool down To 70°C, stop evacuation and stirring;

[0037] Step c) filter the oil product obtained in step b), the specific filtration process is: take out a small amount of the oil product obtained in step b), add 0.03% of the weight of all the oil product diatomite filter aid to stir, and perform circulating filtration After the filter aid forms a filter cake in the filter machine, the remaining oil in the kettle is circulated and filtered until the oil is clear and transparent without mechanical impurities, and oil-gas lubricating oil is obtained.

Embodiment 2

[0039] Step a) Send polyether NPE-108 with a weight percentage of 95% into the blending kettle with a gear pump, evacuate, stir, heat, and raise the temperature to 80°C;

[0040] Step b) Add 1% T501 (2,6-di-tert-butyl-p-cresol) and 4% barium dinonylnaphthalenesulfonate to the base oil obtained in step a), continue to heat up to 125°C, and Dehydrate at 0.09MPa, then cool down to 65°C, stop evacuation and stirring;

[0041]Step c) filtering the oil product obtained in step b), the specific filtration process is: taking a small amount of the oil product obtained in step b), adding 0.035% perlite filter aid of all the oil product weight and stirring, performing circulating filtration, After the filter aid forms a filter cake in the filter machine, the remaining oil in the kettle is circulated and filtered until the oil is clear and transparent without mechanical impurities, and oil-gas lubricating oil is obtained.

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Abstract

The invention provides super-high-pressure ethylene compressor oil, which contains the following components in percentage by weight: 93-99% of polyethers synthetic oil, 0.1-2% of antioxidant and 0-5% of anti-rusting agent. The super-high-pressure ethylene compressor oil provided by the invention takes the polyethers synthetic oil as the base oil and special additive compositions are added, so that the product can resist the dilution of ethylene gas and also can control the rise of viscosity under the extremely-high pressure to realize good lubrication; and the oil has good thermal oxidation stability and lubricity, low carbon deposition tendency and low biological toxin, so that the physical health of operators and safety and sanitation of mixing extremely little amount composition with polyethylene products can be guaranteed, and special requirements on the oil for a super-high-pressure compressor system can be satisfied.

Description

technical field [0001] The invention relates to the field of lubricating oil, in particular to an ultra-high pressure ethylene compressor oil and a preparation method thereof. Background technique [0002] The English name of polyethylene: polyethylene, referred to as PE, is a thermoplastic resin obtained by polymerization of ethylene. In industry, it also includes copolymers of ethylene and a small amount of α-olefin. The performance of polyethylene depends on its polymerization method. High-density polyethylene (HDPE) is obtained by Ziegler-Natta polymerization under medium pressure (15-30 atmospheric pressure) organic compound catalytic conditions; at high pressure (100-300MPa), Free radical polymerization under peroxide catalyzed conditions produces low-density polyethylene (LDPE), which has a branched structure. The high-pressure method is used to produce low-density polyethylene. This method was developed early. Use this method The polyethylene produced so far account...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N40/00
Inventor 魏文红曹毅李健宗明罗玉兰
Owner CHINA PETROLEUM & CHEM CORP
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