Laser power modules

https://www.laserdmk.com/130w-260w-laser-pump-source-for-max-fiber-laser-source

https://www.youtube.com/watch?v=mNP-5Oo2aTo.    Skill Make ( subscribed)

pretty cheap on Ebay $9.9

https://www.ebay.com/itm/196993012203?msockid=18a28adebd28608a13779c00bce5611e

laser on 3D printer

https://www.youtube.com/watch?v=dG639pDfDKw.   product not in great details

RMD

 RMD

Retirement topics - Required minimum distributions (RMDs) | Internal Revenue Service

Appendix B. (Continued)

Table I
(Single Life Expectancy)
(For Use by Beneficiaries)
Age	Life Expectancy	Age	Life Expectancy
60	27.1	91	5.3
61	26.2	92	4.9
62	25.4	93	4.6
63	24.5	94	4.3
64	23.7	95	4.0
65	22.9	96	3.7
66	22.0	97	3.4
67	21.2	98	3.2
68	20.4	99	3.0
69	19.6	100	2.8
70	18.8	101	2.6
71	18.0	102	2.5
72	17.2	103	2.3
73	16.4	104	2.2
74	15.6	105	2.1
75	14.8	106	2.1
76	14.1	107	2.1
77	13.3	108	2.0
78	12.6	109	2.0
79	11.9	110	2.0
80	11.2	111	2.0
81	10.5	112	2.0
82	9.9	113	1.9
83	9.3	114	1.9
84	8.7	115	1.8
85	8.1	116	1.8
86	7.6	117	1.6
87	7.1	118	1.4
88	6.6	119	1.1
89	6.1	120+	1.0
90	5.7

Gold Rush

Videos

latest 

https://www.youtube.com/watch?v=-MCPcrBA86U.  claimed to be the fastest processing 10 hrs ago

Aqua regia is a highly corrosive mixture of concentrated nitric acid and hydrochloric acid, capable of dissolving noble metals like gold and platinum.     i.e.  royal water 3 HCl +1 HNO3

://www.youtube.com/watch?v=ASQCa7mfjVo.   part 1

https://www.youtube.com/watch?v=gt-OOWxr7_s.     part 2

https://www.youtube.com/watch?v=5TNy93baIGM

https://www.youtube.com/watch?v=pyvpaPr-J6I

https://www.youtube.com/watch?v=P6JwaAc8B5Y.      7 months

https://www.youtube.com/watch?v=LL1H_XY4zM8.   1 year   hydrogen peroxide

https://www.youtube.com/watch?v=mvAtXNc06Jo.     1 year vinagar

https://www.youtube.com/watch?v=O0Q_qkzIxio.    not show the melting process

https://www.youtube.com/watch?v=0cjDwglpnvg.   burn and chemical

https://www.youtube.com/watch?v=vw9Zf6UnDIE.   practical cut

https://www.youtube.com/@ScrappingIrish.    scrapping Irish channel , he uses nitric acid.

https://www.youtube.com/watch?v=BIqDK23_Rs4           DIP IC gold and silver

 https://www.youtube.com/watch?v=ada0vwSkyK8.          use caustic soda to unveil the pcb to see gold

https://www.youtube.com/watch?v=8Jk8SyC8fco

https://www.youtube.com/watch?v=-yM3Zdx-DYw       no acid smelting , not full extraction.

https://www.youtube.com/watch?v=tQ2dKTQrNCA.   how to chip off components on boards

https://www.youtube.com/watch?v=hDuFNmSQAUc.    no nitric acid.  11.58g gold

https://www.youtube.com/watch?v=UoPx1Drfq3U.    gold from connectors

chemical making stanneous chloride

https://www.youtube.com/watch?v=jY7YlLQsryI

https://www.youtube.com/watch?v=iyHtcoFR0Ig.  plumber no lead solder containing 90% tin

low grade pins gold extraction

https://www.youtube.com/watch?v=vUhnttmwvrA

https://www.youtube.com/watch?v=RbGU-G6n0SE.   practical one

https://www.youtube.com/watch?v=sbpRKSh5g6c.  welding machine using laptop power supply

https://www.youtube.com/watch?v=L91CIorE3xs.   i like practical one rather than just talking

https://www.youtube.com/watch?v=pQoSVHFJqAs. sorting components and id gold

https://www.youtube.com/watch?v=ievbxE9y5vo      muratic acid to dissolve solders pcb

https://www.youtube.com/watch?v=NTVfTXw0i8Q.   find gold Indian traditional methods

https://www.youtube.com/watch?v=R5A5TgqbPFg.    indian guy second video mercury

https://www.youtube.com/watch?v=ObddNx47Mmo. indian guy 2 kinds of powders?

https://www.youtube.com/watch?v=nlRSs2RPoTQ.   white guys, not sure what method? not efficient

https://www.youtube.com/watch?v=IjDbyugJcmM.    extract gold in 5 hrs.

https://www.youtube.com/watch?v=RPeFWcuuD58. palladium and platinum from ceramic capacitors

   

https://www.youtube.com/watch?v=MSJyk8RFNvs   vinagar and salt , 5 months ago

https://www.youtube.com/watch?v=RWf0XLBP9_c.        ram chips cleaning solution links available 

https://www.youtube.com/watch?v=I90bWs1YACo.       ram chips.      venturi blower fume extract link

https://www.youtube.com/watch?v=RUCvPy09Fbg.    vinagar and salt

https://www.youtube.com/watch?v=tAH46YTQH5Y.   remove tin solder  citric acid h2o2

https://www.youtube.com/watch?v=VZ6LBAL6rFc.      BGA  muratric acid

Tin always been a trouble in gold recovery process so it's necessary to clean solder from components before start processing for gold.

here I'm making a special solution which remove soldering specifically and leave copper and gold plating untouched. 

Hydrochloric acid is widely used by refiners to remove tin but it's time consuming prossece and something it also start releasing gold foils into the solution. due to presence of atmospheric oxygen copper would get dissolved and gold foils release....

https://www.youtube.com/watch?v=w9JHhjQjaeQ.    remove tin solders fast.  part 1

https://www.youtube.com/watch?v=VeMWe2Px9jg.  part 2

https://www.youtube.com/@PickyPlans.        Picky Plans youtube channel

https://www.youtube.com/watch?v=-vMqZlQUplA.     cd dvd drive

 

https://www.youtube.com/watch?v=sJs31qK2ClM sulphuric acid DIY , many links on description 

https://www.youtube.com/watch?v=NHBDXtn7pjA. same guy , nitric acid

https://www.youtube.com/watch?v=l9ifS3ubiBc.     sulphuric acid from epsom salt

https://www.youtube.com/watch?v=XGEv9RGrvNY.   making copper sulphate from epsom salt

https://www.youtube.com/watch?v=ohJkyZ_G8-M.     laser gun  out of topic

https://www.youtube.com/watch?v=tzyUda3upHI.    lead dioxide for espom salt electrode

https://www.youtube.com/watch?v=BjaLvwcfYTk.  laser , off topic

https://www.youtube.com/watch?v=K5OVE23LgfA. describes where you can find gold on PC MB pt 1

https://www.youtube.com/watch?v=mNP-5Oo2aTo.   260W Laser metal cutter - off topic

Articles

https://lets-rebuild.com/getting-gold-out-of-microchips.html#google_vignette

Nitric Acid

Amazon.com: Nitric Acid Substitute 8 Ounces : Arts, Crafts & Sewing

Worked good, I mixed 4 tbs of sodium nitrate to 180mL of Hydrochloric acid and some water to dissolve cpu pins.

 Don't use this stuff to refine gold it does not work it ruins the whole process.

 I've used it in three processes and it's failed all three times.bs of sodium nitrate to 180mL of Hydrochloric acid and some water to dissolve cpu pins.

5.0 out of 5 stars Disregard any negativity towards this product

Reviewed in the United States on September 13, 2022

Starts working almost instantly. Do not worry about dissolving or pulverizing beads of sodium nitrate they will dissolve on their own.

I mixed a third of a cup of 33% hydrochloric acid with 2 tbs in a pyrex glass. This was a preliminary test and what I found was….

With in less than 10 minutes the mixture-had already stripped the gold plate off the item I was using as a test subject. So as far as removing gold plate this item is ideal for someone not interested in making nitric acid. However even past the point of the gold plate being dissolved the mixture was still dissolving the base metal underneath. I am assuming that in perhaps a few hours it will be done. And right this is not a high powered solution to dissolving your gold, it will take some time but it will get it done, its creating nitric acid but a weak solution.

Consider this. I pay $10 for 1 gallon of 33 percent hydrochloric acid. The sodium nitrate is cheap as well. I will take this mixture and deal with waiting for the reaction to finish to save the kind of money I am saving and to avoid having strong nitric acid on hand.

Please though you might not see the fumes but they see there. Leave it outside in a safe protected area. Keep the solution away from your pets!!!

Urea

Urea is a nitrogen-containing organic compound produced in the liver as a waste product of protein metabolism and widely used as a nitrogen-rich fertilizer.

Chemical Nature

Urea, also known as carbamide, has the chemical formula CO(NH₂)₂. It consists of a carbonyl group (C=O) flanked by two amino groups (−NH₂), making it the simplest diamide of carbonic acid. It is a colorless, odorless, crystalline solid that is highly soluble in water and chemically stable under normal conditions. Urea can decompose under high temperatures to produce ammonia and carbon dioxide, and its structure allows it to participate in various biochemical and industrial reactions. 

Wikipedia+2

Biological Role

In mammals, urea is the main nitrogenous waste product formed during the breakdown of proteins. When proteins are metabolized, amino groups (−NH₂) are removed from amino acids, producing ammonia (NH₃), which is toxic at high levels. The liver converts ammonia into urea through the urea cycle, a series of enzyme-catalyzed reactions that safely detoxify nitrogen. Urea is then transported to the kidneys and excreted in urine, helping maintain nitrogen balance and preventing ammonia accumulation. It also contributes to the osmotic balance of body fluids, supporting hydration and electrolyte regulation. 

holistichealthpathways.com+1

Industrial and Agricultural Uses

Urea is produced commercially from ammonia and carbon dioxide under high pressure and temperature, forming ammonium carbamate, which decomposes to yield urea and water. Its high nitrogen content makes it one of the most concentrated nitrogen fertilizers, widely used in agriculture to enhance crop growth. Beyond fertilizers, urea is a raw material in the chemical industry, used to manufacture plastics, resins, adhesives, and pharmaceuticals. It also has applications in dermatology, where it is included in creams and ointments for its moisturizing and keratolytic properties. 

Britannica+3

Historical Significance

Urea was first isolated from urine in 1773 by Hilaire-Marin Rouelle. In 1828, Friedrich Wöhler synthesized urea from ammonium cyanate, marking the first laboratory synthesis of an organic compound from inorganic materials. This discovery challenged the doctrine of vitalism, demonstrating that organic compounds could be created artificially. 

Wikipedia+1

In summary, urea is a vital biological compound for nitrogen excretion and a key industrial chemical with diverse applications in agriculture, medicine, and manufacturing. 

https://www.homedepot.com/p/40-lbs-Box-Urea-Fertilizer-UGF-40/316885117

40 lbs. Box Urea Fertilizer

Questions & Answers (18)

Contains 40 lb.

$82.45

($2.06 /lb.)





https://www.walmart.com/c/kp/fertilizer-urea




https://www.amazon.com/Commercial-46-0-0-Granular-Prilled-Fertilizer/dp/B00BFNU0BK/ref=asc_df_B00BFNU0BK?tag=bingshoppinga-20&linkCode=df0&hvadid=80401998411353&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=87443&hvtargid=pla-4584001477643495&msclkid=ce479eb6c7f51b3c7ed6f70b743b8bc8&th=1







CITRIC ACID
https://www.amazon.com/Viva-Doria-Citric-Grade-Grain/dp/B0C5NQM8S1/ref=asc_df_B0C5NQM8S1?tag=bingshoppinga-20&linkCode=df0&hvadid=80127120445507&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=c&hvlocint=&hvlocphy=87443&hvtargid=pla-4583726596084510&msclkid=015ce934d5a2102fad40808963f19781&th=1

Thiourea dioxide is an organosulfur compound used primarily as a reducing agent in various industrial applications, particularly in textiles and photograph
This is NOT Thiourea dioxide for woad and indigo dying BUT if you can't find Thiourea dioxide, you can convert Thiourea using household hydrogen peroxide: CH4N2S + 2H2O2 → CH4N2O2S + 2H2O. One needs an accurate scale and understand working with chemicals inherently requires knowledge and cautions.