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Tilly,Quote:
Originally Posted by tillyfromparadise
Have you actually tried this procedure?
If not, perhaps you can try it yourself, rather than just putting it down as BS.
The only things you could possibly lose are the cost of ingredients and the time to process the batch.
Tony
I did the proceedure on 9/17/2017 , my notes on it aren't very good . First I used Magnesol on new corn oil to remove as much of the free fatty acids as I could , so that wouldn't complicate my results . I used 100 milliliters dry methanol , added 4 grams potassium hydroxide then 2 grams calcium oxide at 3:25 PM . Stirred for 1 hour . Room temperature was 22 degrees celcius . At 4:29 PM I poured 325 milliliters of free fatty acid free new corn oil into the prepared methoxide solution , with stirring . At 4:58 PM did a 10/90 Warnquest test , there was 1 milliliter of white solid fallout . At 5:50 PM turned off magnetic stirring and a regular glycerine layer formed . I did this about 3 years ago . I don't remember all the details , but it worked .
G'day Tony,
Yes, I did a test series and posted the results to this forum.Quote:
Originally Posted by Tony From West Oz
I specifically went to Bunnings and bought a bag of their finest Cement powder to perform the tests.
It made no difference. Save your money and time.
What people seem to be overlooking is that this is a meaningless procedure. The reaction goes at ambient temperature with or without the cement powder.
It is just fairy dust. Adding cement powder makes no difference.
As long as everything remains liquid, temperature is not a limiting factor.
Cement is partly calcium oxide . One molecule of water adds to one molecule of calcium oxide to make calcium hydroxide . CaO + H2O ------> Ca(OH)2 . So some water is removed from the reaction in making methoxide . Methanol + KOH -------> CH3O- + H2O . Methanol plus potassium or sodium hydroxide yields methoxide plus water . But H2O + CH3O- -----> CH3OH + OH- water plus methoxide yields methanol plus hydroxide ion . It's an equilibrium . Some methoxide is present in a percentage . By removing water availability for the reverse reaction that makes methoxide into methanol the concentration of methoxide should increase . So CH3OH + KOH + CaO -----> CH3O- + Ca(OH)2 + K- methanol plus potassium hydroxide plus calcium oxide yields methoxide plus calcium hydroxide plus potassium ion in solution . But water has been made unavalable to decompose the methoxide ion into methanol and hydroxide ion (in solution). Increasing the concentration of methoxide ion should increase the reaction rate at room temperature or above . Making the methoxide solution takes extra time . I wouldn't use cement . I used technical grade calcium oxide . Disposing of used cement from this proceedure might be a problem .
G'day WesleyB,According to the MSDS for portland cement < 90% is portland cement clinker, 3 - 8% is gypsum, 0 – 5% is limestone, 0 – 5% is GRANULATED BLAST FURNACE SLAG and a trace of CHROMIUM (VI) HEXAVALENT.Quote:
Originally Posted by WesleyB
Cement clinker which is typically 95%- 97% of Cement powder has a calcium oxide content between 0% and 1%.
In reality there is very little or no Calcium oxide in portland cement
I looked in a Condensed Chemical Dictionary giving , Portland Cement - A type of hydraulic cement in the form of finely divided grey powder composed of lime , alumina , silica and iron oxide as tetracalcium aluminoferrate ... I found a internet reference to cement saying lime is about 57% of cement . I worked in a cement factory once , stacking warm bags of cement emerging from a furnace on a conveyor belt . The ground material is passed through a natural gas flame making lime from lime stone . I used technical grade calcium oxide in making the methoxide solution before making room temperature biodiesel , I didn't use cement . Lime is calcium oxide . I believe using cement was suggested by Dr. Mark Imisides .
G'day WesleyB,Please provide a url to the website that said lime is about 57% of cement.Quote:
Originally Posted by WesleyB
This MSDS http://www.adelaidebrighton.com.au/a...CEMENT_SDS.pdf1 for Portland Cement gives the ingredients as:
PORTLAND CEMENT CLINKER < 90% 65997-15-1
*GYPSUM CaSO4 2H2O 3 - 8% 10101-41-4
*LIMESTONE CaCO3 0 – 5% 1317-65-3
*GRANULATED BLAST FURNACE SLAG 0 – 5% 65996-69-2
CHROMIUM (VI) HEXAVALENT Cr6+ Trace 18540-29-9
*NOTE: Ingredient may contain crystalline silica (CAS No. 14808-60-7).
This MSDS for Portland Cement Clinker https://www.holcim.bg/sites/bulgaria...clinker_en.pdf
Tricalcium silicate CaO.SiO2 Typical concentration 63% Range from 0% – 85%
Dicalcium silicate 2CaO.SiO2 Typical Concentration 15% Range from 0% - 85%
Tetracalcium aluminoferrite 4CaO.Al2O3.Fe2O3 Typical concentration 10% Range from 0% – 30%
Tricalcium aluminate 3CaO.Al2O3 Typical Concentration 10% Range from 0% – 20%
Calcium oxide (free lime) CaO Typical concentration 1% Range from 0% - 10%
I think I will stand with my original observation, there is not much if any Calcium Oxide in Cement
The procedure being discussed calls for Cement not technical grade calcium oxide They are not the same thing.Quote:
I used technical grade calcium oxide in making the methoxide solution before making room temperature biodiesel
As I recall you also made room temperature biodiesel just using the normal procedure with no magical ingredients.
I don't know what a URL is . I used the yahoo.com search engine with words cement composition . Then scrolled down to see a listing showing cement is 57% calcium oxide (lime) . Yes I did make biodiesel at room temperature using potassium hydroxide only to make the methoxide solution , at room temperature . I don't remember how long I stirred it . I've got several lab notebooks , I usually write what I do in experiments . If the proceedure uses cement then using technical grade calcium oxide and caustic is novel , a possible improvement for industrial scale biodiesel production . When I made biodiesel at room temperature using calcium oxide and potassium hydroxide to make the methoxide/methanol solution , as I mixed the oil and methoxide solution there was a quick color change . There's no magic involved . It's plain chemistry .
G'day WesleyB;
"WHAT IS A URL AND WHERE IS IT LOCATEDQuote:
Originally Posted by WesleyB
A uniform resource locator (URL) is basically what you would call the website address. It's a text string that refers the user to a location of a web page or another resource (such as a program or a graphic document). Surfing the web, you can always see the URL of the currently opened page in the browser's address bar."
This is the URL for the page I coppied this information, just click on the URL: https://www.bitdegree.org/learn/unif...source-locator
While it is true that Calcium oxide is a large percent of the ingredients for producing cement, the resulting cement produced contains virtually no Calcium oxide.Quote:
I used the yahoo.com search engine with words cement composition . Then scrolled down to see a listing showing cement is 57% calcium oxide (lime) .
As an example, roughly 80% of what goes into a biodiesel reactor is triglycerides. If all goes well, the resulting finished biodiesel produced will contain well under 1% triglycerides.