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Active material in liquid detergent
In liquid dishwash detergent when I came to calculate the % of active material , I calculate the % of sulfonic acid alone or with the amount of soda it need to neutralize
( is soda is considered as active material when it neutral the acid or not)
Any example please? -
12 Replies
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Active matter in such cases refer to the active surfactant matter, now you decide.
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Thanks my Friend I really know this but some people say that soda is consider as active matter as it use to neutralize the acid is this true or not
This is my question -
Quote those people here, don’t go by hearsay.
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The sulphonic acid as alkyl benzene sulfonate is neutalized with sodium hydroxide (or another base) in-situ while formulating into dishwashing products; so what you refer to as soda is sodium which is included in the active component ie sodium alkylbenzene sulfonate.
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@”DRBOB@VERDIENT.BIZ” thank my friend
Yes I mean soda is any base such NaOH
here I mean when I came to calculate the % active material assume that I make total batch of 100 kg dishwasher I use 10 kg alkyl benzene sulfonate with concentration of 85% and need 1.8 kg custic NaOH with concentration of 99% here what you caculate only
10kg or both 10kg with 1.8 kg
This is an example -
Your real concentration expressed as sodium ABS is 10 x 0.85 + 1.8 = 10.3 kg/100kg which is 10.3%. Your sulphonic acid conc is low at 85%.As I recall even via Oleum should be >90% and via SO3 even higher unless your supplier is using chlorosulphonic acid.
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@”DRBOB@VERDIENT.BIZ” can you elaborate the last sentence please, is it about the source of ABS origin. Will be great to hear from you.
@Chemist_Ahmed is it the LABSA that you are using with 96% purity?? -
@Chemist77 I was trying to understand through process how SA is so low ie 85%, Most if not all LAS is made via oleum or SO3 with conversions of alkyl benzene to sulphonic acid of 98-99% so most products marketed are 96% active with 2% free oil (as alkyl benzene).Supplier could be using a process I am not not familiar with (doubtful) or there is a mistake on Cof A/analysis.All of the foregoing relate to the source of the ABS.
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@”DRBOB@VERDIENT.BIZ” thank you, makes easier to understand. As you said i have seen 96% all this time and that’s about it.
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@”DRBOB@VERDIENT.BIZ”
@Chemist77
I’m very happy to talk with both of you my friends and I really found the answer thank a lot .
About you ask me about the purity of LABAS ,here in Egypt the suppliers are made this with variety of purity and may be reach to 60%
We have here three classes of ABS
First is called cloudy ABS with low low low purity
2nd is called colourless and the purity of it is between 75% to 85%
3rd is called Gaseous and the purity of it is 96%
Here in Egypt most of us use the 2nd kind of ABS that 1 kg neutralize with NaOH 180 gram
This is what I know and I don’t know about the process to make ABS -
Eventually you need to decide the final pH and that is the final step. I have seen few with as low as 5.5 going upto 8.5 and if I am using LABSA I would prefer pH on higher side. Add an amine oxide, I wouldn’t mind a small throw in of SLES as well. I do that in mine and my benchmark is Fairy.
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@Chemist77 sorry can’t understand what you mean my friend
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