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|
Hydrocarbon
Series Rinse
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Trichlorethylene,
Dichloromethane,
Methoklone
|
Industrially
Petrol
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Water-soluble
degrease agent
|
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Constituent
|
carbon and
hydrogen , for example:
N-PARAFFIN ISO-PARAFFIN
NAPHTHENES
|
The structures
are:
which contains small amount
of water and antacid (usually ammoniun stearate)
|
| carbon, hydrogen
and huge amount of S.P , aromatic and metallic ions. |
|
| Surfactants
and additions (cleaning efficiency : alkalinity is better then neutral) |
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Toxicity
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Extremely
low ( 0.1% of trichlorethylene)
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Extremely
highWill be tabooed in the future
(no allow in Taiwan already)carcinogen
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Highcarcinogen
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HighGreat
influence to environment(Nonylphenol)
|
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Executive
order
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None
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Yes
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None
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Yes
|
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Smell
|
very weak
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Very strongserious
damages to human body
|
strong(Great
influence to human body)
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weak
|
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Influence
to metal surface
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None
| not participate
in the reaction on metal surface |
|
If not well-controled
,
will corrode the surface and cause etching |
|
Constituents
not stable and often remain on surface
(sometimes can't observed with naked eye) |
|
Yes
| May produce
some unwanted compound like hydroxide |
|
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Acidify
|
None
| Hydrocarbon
is a neutral solvent that will not participate during the reaction
. there for no acidification |
|
Yes
| Reaction as
below:In order to make trichlorethylene creat continually cracks ,
lots of heat were added during the process which came along with acid-forming
like hydrochloric. After a while , this will cause etching and damage
your facilities. |
|
Constituents
not stable there for can not estimate.
Could have , but not sure |
|
None
| But after
rinsing , surfactants and acidify surface may cause polarization
. Antirust measure must be taken to prevent oxidization |
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Reclamation
|
| Recyclable
By vacuum decompress dissociation |
|
| Recyclable
By distilled But the process will cause acidification |
|
|
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PH
|
|
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Waste water
handling
|
| Recycled
by recycle-system |
|
Could
be recycled But not able to dispose the waste water .
The production cost will be too high if handled
by coercion. |
|
| Need
to contact with the waste water handling agent |
|
| Can't
drain the waste water without disposition |
|
|
Antirust
|
| Because
impermanency nonpolarity occurs after the surface been washed , this
can help antirust |
|
|
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None
| Need
antirust measure after washed (easy to be oxidized) |
|
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Cost
|
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High
|
(now a
rising tide of price)
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|
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Cleaning efficiency
|
|
|
|
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Cleaning process
|
| Designed
according to customer's demand |
|
| Designed
according to customer's demand |
|
| Designed
according to customer's demand |
|
| Designed
according to customer's demand |
|
|
Facilities
cost
|
|
Average(facility's
lifetime is longer)
|
|
|
Average(facility
may be corrode by agent)
|
|
|
| Average(facility
may be corrode by agent) |
|
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Consumption
|
| After
running the cleaning process we discovered that whthin a recycle system
in it , the consumption of rinse is about 1/3-1/5 of trichlorethylene |
|
|
|
Need
huge amount of water and at the same time produced lots of waste water
which needs many efforts to handle.
There will be a concern of pollution. |
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Remark
|
|
| By
the ascriction of "Montreal Protocol on Substances that Depletethe
Ozone Layer", trichlorethylene will be prohibited in the world. |
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