CN103525526B - Lubricant of tail gas recovery compressor - Google Patents

Abstract

The invention relates to a lubricant of a tail gas recovery compressor. By adopting poly alpha-olefin and pentaerythritol ester which are compounded as basic oil, the lubricant matched with various composite additives comprises an antiwear agent, an oiliness agent, an antioxidant preservative, an anti-foaming agent, an anticreaming agent, a metal deactivator, a clearing agent, a dispersant, an antioxidant and an assistant. The lubricant can be used for reducing the friction coefficient of a rotary shaft, an oil film generated is thin and great in strength and stable in constitution and performance. The lubricant has less possibility of chemically reacting with gaseous substances with strong corrosivity, has good cleaning, cooling, lubricating and washing performances, and is free from corrosion to equipment, toxicity and pungent smell.

Description

The lubricant of tail gas recycle compressor

Technical field

The invention belongs to the field of lubricant for tail gas recycle compressor.

Background technology

In oil-refining chemical enterprise, tail gas recycle compressor is the major equipment of whole gas pipeline network, and its Main Function is by after the collection and confinement of gases compression in low-pressure pipe network, is recovered into the external air feed of gas holder and is used as fuel, to reach the object of energy-saving and emission-reduction, and obtain certain economic benefit.The main ingredient of tail gas is the hydrocarbon gas of hydrogen, nitrogen and carbon number 1 ~ 4, the hydrocarbon gas of the carbon more than 5 also containing minute quantity and oxygen.These component boiling points are different, be subject to the impact of outside air temperature, ceaselessly liquefy and evaporate in pipe network; These gases contain the various lighter hydrocarbons collected from device, also carry a small amount of moisture and solid impurity.Therefore tail gas recycle compressor operating condition is very harsh, affects the use of compressor oil to a great extent.Although the processing mode of each oil-refining chemical enterprise to device for recovering tail gas is not quite similar, great majority are all also adopt double-screw compressor.

Summary of the invention

The technical problem to be solved in the present invention be to provide a kind of reduce rotating shaft frictional coefficient, generation oil film thin and intensity large, composition and stable performance; Not easily strong with corrodibility gaseous substance generation chemical reaction, has good clean, cooling, lubrication and rinses performance; Corrosion-free to equipment, nontoxicity, the compressor lubricant for tail gas recycle had no irritating odor.

The present invention solves the problems of the technologies described above by following technical scheme: adopt oil based on Poly alpha Olefins (PAO) and pentaerythritol ester compound, coordinate multiple composite additive, its each component and mass percent thereof are:

Component	Content (mass percent)
		Base oil	Surplus
Anti-wear agent	2.0%～3.0%
		Oiliness improver	3.0%～4.0%
Antioxidant preservative	1.0%～1.5%
		Kilfoam	0.003%～0.005%
Non-emulsifying agent	0.1%～0.5%
		Metal passivator	1.0%～1.5%

Purification agent	4.0%～6.0%
		Dispersion agent	5.0%～7.0%
Oxidation inhibitor	4.0%～6.0%
		Auxiliary agent	3.0%～5.0%

Base oil is the Poly alpha Olefins (PAO) of mass ratio 60% ~ 70% and the pentaerythritol ester compound of 40% ~ 30%.

Anti-wear agent is molybdenum dithiocarbamate.

Oiliness improver is the Uniphat A60 of mass ratio 60% ~ 50% and the ethyl oleate compound of 40% ~ 50%.

Antioxidant preservative is thiadiazoles derivative.

Kilfoam is dimethyl silicone oil.

Non-emulsifying agent is amine and epoxy compounds condenses.

Metal passivator is 124 Triazole derivative.

Purification agent is calcium sulfenyl phenolate.

Dispersion agent is the diene base succimide of mass ratio 60% ~ 50% and the polyisobutene succinimide compound of 40% ~ 50%.

Oxidation inhibitor is the N-phenyl-a-naphthylamines of mass ratio 60% ~ 50% and the dialkyl diphenylamine compound of 40% ~ 50%.

Auxiliary agent is phosphoric acid ester.

The lubricant of tail gas recycle compressor of the present invention, can reduce the frictional coefficient of rotating shaft, and the oil film of generation is thin and intensity large, composition and stable performance; Not easily strong with corrodibility gaseous substance generation chemical reaction, has good clean, cooling, lubrication and rinses performance; Corrosion-free to equipment, nontoxicity, has no irritating odor.

Embodiment

Embodiment 1:

Following component is in harmonious proportion by mass percentage and forms:

Component	Content (mass percent)
		The Poly alpha Olefins (PAO) of mass ratio 60% and the pentaerythritol ester compound of 40%	66.0%
Molybdenum dithiocarbamate	3.0%
		The Uniphat A60 of mass ratio 60% and the ethyl oleate compound of 40%	4.0%
Thiadiazoles derivative	1.5%
		Dimethyl silicone oil	0.005%
Amine and epoxy compounds condenses	0.495%

124 Triazole derivative	1.0%
		Calcium sulfenyl phenolate	6.0%
The diene base succimide of mass ratio 60% and the polyisobutene succinimide compound of 40%	7.0%
		N-phenyl-a-the naphthylamines of mass ratio 60% and the dialkyl diphenylamine compound of 40%	6.0%
Phosphoric acid ester	5.0%

Above component summation is 100%.

Embodiment 2:

Following component is in harmonious proportion by mass percentage and forms:

Component	Content (mass percent)
		The Poly alpha Olefins (PAO) of mass ratio 65% and the pentaerythritol ester compound of 35%	71.0%
Molybdenum dithiocarbamate	2.5%
		The Uniphat A60 of mass ratio 55% and the ethyl oleate compound of 45%	3.5%
Thiadiazoles derivative	1.2%
		Dimethyl silicone oil	0.004%
Amine and epoxy compounds condenses	0.396%
		124 Triazole derivative	1.4%
Calcium sulfenyl phenolate	5.0%
		The diene base succimide of mass ratio 55% and the polyisobutene succinimide compound of 45%	6.0%
N-phenyl-a-the naphthylamines of mass ratio 55% and the dialkyl diphenylamine compound of 45%	5.0%
		Phosphoric acid ester	4.0%

Above component summation is 100%.

Embodiment 3:

Following component is in harmonious proportion by mass percentage and forms:

Component	Content (mass percent)
		The Poly alpha Olefins (PAO) of mass ratio 70% and the pentaerythritol ester compound of 30%	76.0%
Molybdenum dithiocarbamate	2.0%
		The Uniphat A60 of mass ratio 50% and the ethyl oleate compound of 50%	3.0%
Thiadiazoles derivative	1.35%
		Dimethyl silicone oil	0.003%

Amine and epoxy compounds condenses	0.297%
		124 Triazole derivative	1.35%
Calcium sulfenyl phenolate	4.0%
		The diene base succimide of mass ratio 50% and the polyisobutene succinimide compound of 50%	5.0%
N-phenyl-a-the naphthylamines of mass ratio 50% and the dialkyl diphenylamine compound of 50%	4.0%
		Phosphoric acid ester	3.0%

Above component summation is 100%.

The main physical and chemical index of product of embodiment 3 is:

Project	Quality index
		Moisture, % is not more than	Nothing
40 DEG C of kinematic viscosity mm 2/s	71.6
		Flash-point (opening) DEG C, is greater than	220
Mechanical impurity, % is not more than	0.01
		Last non seizure load (Pb), Kg is not less than	70
Pour point, DEG C, not higher than	-10
		Water soluble acid or alkali	Nothing
Corrosion test (copper sheet, 100 DEG C, 3h), level	1
		Viscosity index, is not less than	150
Rust prevention test (No. 15 steel)	Rustless
		Oxidation stability, h is no less than	1000
Demulsification resistance (be the time of 3mL to emulsion layer), min:54 DEG C is not more than	30
		Whipability (24 DEG C), mL: foam tendency is not more than	100

Claims (1)

1. a lubricant for tail gas recycle compressor, it is characterized in that adopting oil based on poly-ɑ-alkene and pentaerythritol ester compound, coordinate multiple composite additive, its each component and mass percent thereof are:

Component Mass percentage content Base oil Surplus Anti-wear agent 2.0％～3.0％ Oiliness improver 3.0％～4.0％ Antioxidant preservative 1.0％～1.5％ Kilfoam 0.003％～0.005％ Non-emulsifying agent 0.1％～0.5％ Metal passivator 1.0％～1.5％ Purification agent 4.0％～6.0％ Dispersion agent 5.0％～7.0％ Oxidation inhibitor 4.0％～6.0％ Auxiliary agent 3.0％～5.0％

Wherein:

Base oil is the poly-ɑ-alkene of mass ratio 60% ~ 70% and the pentaerythritol ester compound of 40% ~ 30%;

Anti-wear agent is molybdenum dithiocarbamate;

Oiliness improver is the Uniphat A60 of mass ratio 60% ~ 50% and the ethyl oleate compound of 40% ~ 50%;

Antioxidant preservative is thiadiazoles derivative;

Kilfoam is dimethyl silicone oil;

Non-emulsifying agent is amine and epoxy compounds condenses;

Metal passivator is 124 Triazole derivative;

Purification agent is calcium sulfenyl phenolate;

Auxiliary agent is phosphoric acid ester;

Dispersion agent is the diene base succimide of mass ratio 60% ~ 50% and the polyisobutene succinimide compound of 40% ~ 50%;

Oxidation inhibitor is the N-phenyl-a-naphthylamines of mass ratio 60% ~ 50% and the dialkyl diphenylamine compound of 40% ~ 50%.