CN103822937A - Boiling point testing method for trichloroethylene bath solution - Google Patents

Abstract

The invention belongs to the technical field of oil removal of metal parts, and particularly relates to a boiling point testing method for a trichloroethylene bath solution. According to the method, the boiling point of the trichloroethylene bath solution is accurately measured, the method is easy to operate, the problem of conditions for the replacement of the trichloroethylene bath solution is solved, the oil content of the trichloroethylene bath solution is monitored, and oil removal effects are ensured.

Description

Triclene tank liquor boiling point method of testing

Technical field

The invention belongs to metal parts degreasing technique field, particularly relate to a kind of boiling point method of testing of triclene tank liquor.

Background technology

Triclene tank liquor carries out oil removing for metal parts by vapour phase solvent method, external subcontractor proposes to weigh with boiling point the oleaginousness of triclene tank liquor in technique authentication evaluation, in the time that boiling point exceedes 91 ℃, its oleaginousness just exceedes 30% index request, need to change tank liquor, thereby guarantee the effect of oil removing.There is no before this to weigh with boiling point accordingly the test method of the oleaginousness of triclene tank liquor, also do not have at present to use for reference the test method of measuring triclene tank liquor boiling point, we have carried out the Study on Test Method of triclene tank liquor boiling point.

Summary of the invention

The technical problem to be solved in the present invention:

This method of testing has solved the condition of changing triclene tank liquor, has guaranteed the effect of oil removing.

Technical scheme of the present invention:

The present invention uses instrument and material is as follows:

1.1 liang of hole flasks, 100ml, is made up of pyroceram;

1.2 straight pipe type reflux condensing tubes;

1.3 interior mark formula list globe thermometers, scale division value is 0.1 ℃, 50～100 ℃ of ranges;

1.4 can regulate and control electric heating cover;

1.5 glycerol baths, are equipped with 200ml glycerine in 500ml beaker, the aperture root of liquid level to two hole flask;

1.6 graduated cylinders, 100ml, scale division value is 1ml;

1.7 air manometers, scale division value is 0.1Kpa;

1.8 zeolites, silit grain or other suitable inert material fragment.

This method of testing comprises the following steps:

Charge weight is no more than the sample shake 5 minutes of two hole flask internal volumes 3/4 by 2.1, mix;

2.2 use graduated cylinders measure 60ml sample, pour in clean two dry hole flasks, then put into the zeolite that two, three gross masses are 0.5-0.7g;

2.3 insert clean dry condenser pipe and thermometer respectively in two holes of flask as soon as possible, and the degree of depth of inserting from flask side opening with the thermometer of plug is as the criterion apart from the center 6.5mm of drag with mercury bulb, and its junction guarantees sealing, in order to avoid gas leakage;

The glycerol bath beaker being placed on electric heater put into by two hole flasks by 2.4, and the top of condenser is fixed on support with clip, puts respectively emulsion tube at the entery and delivery port of condenser pipe, and makes condenser pipe interlayer be full of water;

The upper end of 2.5 condenser pipes clogs with cotton, condenses in order to avoid airborne water vapor enters condenser pipe;

2.6 open electrical heating switch, adjust electrical heating intensity, make sample start to reflux at 10～15min, at this moment close observation liquid level and thermometer, and the initial point temperature that reads bubbling boiling sign is boiling temperature;

2.7 close heater switch, the device in glycerol bath and glycerol bath are shifted out to heating jacket together cooling, avoid waste heat to continue to heat, and cause triclene bumping;

2.8 read and record atmospheric pressure Po, are accurate to 0.1KPa, record barometer temperature simultaneously;

3.1 result of calculations: according to the following formula temperature reading is carried out to air pressure and depart from standard atmospheric pressure correction, corrected value δ t is calculated as follows:

δt=K(101.3-Po+δP)

In formula: K-boiling point, with the rate of change of pressure, gets 0.32, and unit is degree Celsius every kPa (℃/KPa); δ P-the corrected value reading by table 1, unit is kPa (KPa);

The algebraic sum of getting temperature reading t and corrected value δ t is measurement result T:

T=t+δt

Table 1 barometer reading is corrected to the corrected value of 0 ℃

Beneficial effect of the present invention: accurately measure the boiling point of tank liquor triclene, simple to operate, solve the condition of changing triclene tank liquor, realize the monitoring to triclene tank liquor oleaginousness, guarantee the effect of oil removing.

Embodiment

No. 46001 triclene tank liquor boiling point tests

The sample plasma bottle that triclene tank liquor is housed is fully shaken 5 minutes, tank liquor is mixed.Measure 60ml sample with graduated cylinder, pour in clean two dry hole flasks, then put into two, three zeolites.As soon as possible clean dry condenser pipe and thermometer inserted respectively in two holes of flask, the degree of depth of inserting from flask side opening with the thermometer of plug is as the criterion apart from the center 6.5mm of drag with mercury bulb, and its junction guarantees sealing, in order to avoid gas leakage.Two hole flasks are put into the glycerol bath beaker being placed on electric heater, the top of condenser is fixed on support with clip, puts respectively emulsion tube at the entery and delivery port of condenser pipe, and makes condenser pipe interlayer be full of mobile tap water.The upper end of condenser pipe clogs with cotton, condenses in order to avoid airborne water vapor enters condenser pipe.Open electrical heating switch, adjust electrical heating intensity, make sample start to reflux at 10～15min, at this moment close observation liquid level and thermometer, the initial point temperature that reads bubbling boiling sign is boiling temperature.Close heater switch, the device in glycerol bath and glycerol bath is shifted out to heating jacket together cooling, avoid waste heat to continue to heat, cause triclene bumping.

Record atmospheric pressure, be accurate to 0.1KPa, record barometer temperature simultaneously.

Temperature reading: 88.0 ℃

Room temperature: 20.4 ℃

Barometer reading Po:100.5KPa

Barometer reading is corrected to the corrected value δ P:0.325KPa of 0 ℃

Temperature correction value: δ t=K (101.3-Po+ δ P)

=0.32×（101.3-100.5+0.325）

=0.36℃

Boiling point T=88.0+0.36=88.4 ℃

When boiling temperature does not exceed 91 ℃, do not need to change tank liquor.

No. 2.0850068 triclene tank liquor boiling point tests of example

The sample plasma bottle that triclene tank liquor is housed is fully shaken 5 minutes, tank liquor is mixed.Measure 60ml sample with graduated cylinder, pour in clean two dry hole flasks, then put into two, three zeolites.As soon as possible clean dry condenser pipe and thermometer inserted respectively in two holes of flask, the degree of depth of inserting from flask side opening with the thermometer of plug is as the criterion apart from the center 6.5mm of drag with mercury bulb, and its junction guarantees sealing, in order to avoid gas leakage.Two hole flasks are put into the glycerol bath beaker being placed on electric heater, the top of condenser is fixed on support with clip, puts respectively emulsion tube at the entery and delivery port of condenser pipe, and makes condenser pipe interlayer be full of mobile tap water.The upper end of condenser pipe clogs with cotton, condenses in order to avoid airborne water vapor enters condenser pipe.Open electrical heating switch, adjust electrical heating intensity, make sample start to reflux at 10～15min, at this moment close observation liquid level and thermometer, the initial point temperature that reads bubbling boiling sign is boiling temperature.Close heater switch, the device in glycerol bath and glycerol bath is shifted out to heating jacket together cooling, avoid waste heat to continue to heat, cause triclene bumping.

Record atmospheric pressure, be accurate to 0.1KPa, record barometer temperature simultaneously.

Temperature reading: 90.8 ℃

Room temperature: 22.0 ℃

Barometer reading Po:100.5KPa

Barometer reading is corrected to the corrected value δ P:0.358KPa of 0 ℃

Temperature correction value: δ t=K (101.3-Po+ δ P)

=0.32×（101.3-100.5+0.358）

=0.37℃

Boiling point T=90.8+0.37=91.2 ℃

When boiling temperature exceedes 91 ℃, need to change tank liquor.

Claims (1)

1. triclene tank liquor boiling point method of testing, is characterized in that, this method of testing comprises the following steps:

(1) sample that charge weight is no more than to two hole flask internal volumes 3/4 shakes 5 minutes, mix;

(2) measure 60ml sample with graduated cylinder, pour in clean two dry hole flasks, then put into the zeolite that two, three gross masses are 0.5-0.7g;

(3) as soon as possible clean dry condenser pipe and thermometer inserted respectively in two holes of flask, the degree of depth of inserting from flask side opening with the thermometer of plug is as the criterion apart from the center 6.5mm of drag with mercury bulb, and its junction guarantees sealing, in order to avoid gas leakage;

(4) two hole flasks are put into the glycerol bath beaker being placed on electric heater, the top of condenser is fixed on support with clip, puts respectively emulsion tube at the entery and delivery port of condenser pipe, and makes condenser pipe interlayer be full of water;

(5) upper end of condenser pipe clogs with cotton, condenses in order to avoid airborne water vapor enters condenser pipe;

(6) open electrical heating switch, adjust electrical heating intensity, make sample start to reflux at 10～15min, at this moment close observation liquid level and thermometer, the initial point temperature that reads bubbling boiling sign is boiling temperature;

(7) close heater switch, the device in glycerol bath and glycerol bath is shifted out to heating jacket together cooling, avoid waste heat to continue to heat, cause triclene bumping;

(8) read and record atmospheric pressure Po, be accurate to 0.1KPa, record barometer temperature simultaneously;

(9) result of calculation: according to the following formula temperature reading is carried out to air pressure and depart from standard atmospheric pressure correction, corrected value δ t is calculated as follows:

δt=K(101.3-Po+δP)

In formula: K-boiling point, with the rate of change of pressure, gets 0.32, and unit is degree Celsius every kPa (℃/KPa); δ P-the corrected value reading by table 1, unit is kPa (KPa);

The algebraic sum of getting temperature reading t and corrected value δ t is measurement result T:

T=t+δt。

Table 1 barometer reading is corrected to the corrected value of 0 ℃