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Lil' Terp Passive BHO Extractor

 Passive Butane Extractor and Reclaimer

What if you want to make your own BHO and reclaim your butane, but don't have the money to assemble a Terpenator?  See:  /projects/

What if you have lots of time, but limited financial resources?

A simple system like the Tamisium Essential Oils Extractor comes to mind, but while of quality design and manufacture, they certainly aren't cheap.

I started looking at passive butane recovery, which simply requires that the extraction pot be in hot water, and the recovery pot in an ice bath.  I even designed a simple minded system from scratch, so as to get the price down, but alas, local machine shop costs still made it expensive and outside the resources of most maw and pa patients on fixed income.

Hee, hee, hee, a serendipitous order mistake at Glacier tank almost gave me a wet leg, because I had previously asked for 6" diameter sanitary spools, and was told that they were not available.  As fate would have it, they did order a number of them on a special order, which fell through, and I was able to score four 6" X 12" 304 SS sanitary spools for $105 apiece.  Ahwoooooooooooooooooooooooooo!!!!!!!!!!!!!!!!!!!

The spools are 12" long, so one is enough material to make the two tanks required, simply by cutting them in two pieces and welding on new bottoms.

I also grabbed two end plates, and tri-clamps, so that the two tanks will have tops, as well as a 1 1/2" tri-clamp ferrule, and a 1 1/2" tri-clamp to 1/4" female NPT adapter, plus the two 1 1/2" tri-clamps.

I grabbed a 1 1/2" spool 6" long for the column, which should hold about an ounce of dried prime bud, that has been sized and the sticks removed.

I picked up three 1/4" stainless ball valves at Paramount Supply, along with two 1/4" NPT 304 stainless half couplings.

For bottoms to the tanks, I ordered 1/2" X 6.5" diameter 304 blanks laser cut from plate, and dropped the parts off at a retired friends machine shop to have them machined to shape, as well as mill the holes in the 6" end plates for the 1 1/2" ferrule and the two 1/4" half couplings.

Pictures when those return, but until then, here is my simple minded conceptual:

Little Terp Parts List

No

Item

PN

Qty

Price

Cost

Source

1 1/4 male flare to male NPT JB-A31484 3 $8.28/5 $8.28 RSD
2 1/4" 304SS Ball valve 1000# 34-92303 3 $12.05 $36.15 www.paramountsupply.com
3 1/4" 304SS close nipple 34-06105 3 $0.54 $1.62 Paramount Supply
4 1/4" 304SS 1/2 coupling 34-07136 2 $0.71 $1.42 Paramount Supply
5 1 1/2" End cap X 1/4" Fe NPT NPT25-FM 1 $10.95 $10.95 www.GlacierTanks.com
6 1 1/2" Tri-clamp CSH-1500 2  $5.90 $11.80 Glacier Tank
7 1 1/2" X 6" Sanitary spool SP-150-006 1 $29.00 $29 Glacier Tank
8 1 1/2" Tri-clamp weld ferrule F150-28 1 $3.90 ea $3.90 Glacier Tank
9 6" Sanitary spool end cap Cap-600 2 $35/ea $70 Glacier Tank
10 6" Tri-clamps CSH-600 2 $25.27 $50.54 Glacier Tank
11 6" X 12" Sanitary spool Sp-600-012 1 $105 $105 Glacier Tank
12 Tank bottom blanks N/A 2 $32 ea $64 Moody Machine
13 1 1/2" Buna-N seals and 20 mesh screens N/A 2 $15.90 $31.80 www.BreweryGaskets.com
14 6" Buna-N seals W181663 2 $14.92 $29.84 SustainableSupply.com
15 1/4" X 36" Refrigeration hose   1 $51 $24.95 Northwaysmachinery
16 Total       $479.25  

GW

Lu lu lu lu lu lu lu lu lu lu lu  lu  lu  lu lu!!!!!!!!!!!!!!!!  I picked up the parts for the new passive butane recovery system from the machine shop today and will drop them off at the welders tomorrow.

Couldn't resist mocking up some shots of the components stuck together, before actual welding.  As you can see from the pictures, the tanks are both made from the same 6" X 12" sanitary spool, which I scored from Glacier Tank.  I had them cut into two pieces, to make the wrappers and triclamp closures for both tanks. The bottoms were laser cut from 1/2" 304SS By BBC Steel in Canby, and were machined by Moody Machining in Milwaukie.  Besides a clean up cut on all exposed surfaces, the bottoms were grooved to accept the tank wrappers. The collection tank lid has two holes cut in it, to receive a 1/4" 304SS half coupling and a 1 1/2" Triclamp weld coupling. The butane recovery tank lid was machined to receive a 1/4" 304SS half coupling. The rest are all screw together parts!  Hee, hee, hee.................... More after welding and a test run!  Ahwooooooooooooooooooooooooooo!!!!!

6-3-12

Lu lu lu lu lu lu lu lu lu lu lu lu!!!!!!!!!! Hee, hee, hee, the welded parts are back and Gibson aerospace welding did a gorgeous job as usual!

Once a weld engineer for a metal fabrication company, I was certified as an ASTME Section IX boiler code welder, but with a cataract on one eye, I have no fine depth perception, and eschew welding until I get it fixed.

Even though Gibson's is not certified to Section IX boiler code, he is certified to numerous aerospace welding specifications that are as restrictive, or more so, and one of the best TIG welders that I met in my professional career.

He sure does purdy work too and noted that the material welded exceedingly clean and was a pleasure joining the two 304 SS components using 309SS wire.

The collection tank is welded inside and outside, so there are no internal seams or cracks, but the butane recovery tank is welded only on the outside.  None of the other welds actually required outside welds, but we welded both sides, to give them a more finished appearance.

Lookee: I bolted it all together and will boil the system in hot water and detergent today, to get it ready for when the backordered 6" clamp arrives, so I can try it out. Probably play with the extractor half using a pump until then, snicker, snark, snort.............

No

Item

PN

Qty

Price

Cost

Source

1 1/4 male flare to male NPT JB-A31484 3 $8.28/5 $8.28 RSD
2 1/4" 304SS Ball valve 1000# 34-92303 3 $12.05 $36.15 www.paramountsupply.com
3 1/4" 304SS close nipple 34-06105 3 $0.54 $1.62 Paramount Supply
4 1/4" 304SS half coupling 34-07136 2 $0.71 $1.42 Paramount Supply
5 1 1/2" End cap X 1/4" Fe NPT NPT25-FM 1 $10.95 $10.95 www.GlacierTanks.com
6 1 1/2" Tri-clamp CSH-1500 2  $5.90 $11.80 Glacier Tank
7 1 1/2" X 6" Sanitary spool SP-150-006 1 $29.00 $29 Glacier Tank
8 1 1/2" Tri-clamp weld ferrule F150-28 1 $3.90 ea $3.90 Glacier Tank
9 6" Sanitary spool end cap Cap-600 2 $35/ea $70 Glacier Tank
10 6" Tri-clamps CSH-600 2 $25.27 $50.54 Glacier Tank
11 6" X 12" Sanitary spool Sp-600-012 1 $105 $105 Glacier Tank
12 Laser cut 304SS tank bottom blanks N/A 2 $33.50 $67 BBC Steel
13 1 1/2" Buna-N seals and 20 mesh screens N/A 2 $15.90 $31.80 www.BreweryGaskets.com
14 6" Buna-N seals W181663 2 $14.92 $29.84 SustainableSupply.com
15 1/4" X 36" Refrigeration hose   1 $24.95 $24.95 Northwaysmachinery
             
16 Sub Total parts       $482.25  
             
17 Machine tank bottoms 30 minute   2   $60 J Moody & Co
  Part spool   1   $15  
  Port top plates   2   $45  
          $120  
18 Weld and blend components       $75.00 Gibson Welding
             
19 Total parts and outside labor       $727.25  
             
20 5% Contingency       $36.36  
             
21 Grand total est. cost   for Little Terp       $763.61  

Lu lu lu lu lu lu lu lu lu lu!!!!!!!!!!!!!!

I just learned that Glacier Tank has some 6" diameter X 6" long sanitary spools due in this month, which you could make a tank out of just by using another  end plate and a clamp for the bottom.  The only welding would be for the plumbing fittings.  Hee, hee, hee, snicker, snark, snort!!!!!!!!!!

GW

7-20-12

Hee, hee, hee, snicker, snark, snort, awhooooooooooooooooooooooooooo!!!!!  Ah just loves it when a plan comes together.

Here is the first cleaning run on the Lil Terp, and as you can see, it works slick!  I wish I could say I pulled this one out of my nether regions, but alas, I did not.  Hats off to the inventor of the Tamisium, for his insight in using passive recovery in this application!

Since this was a cleaning run, after I washed everything in denatured alcohol and then boiled it out in hot water and detergent, we ran donated mixed trim destined for topical application.

I installed the 1 1/2" X 12" column, which held approximately 2 ounces of material, after first packing in two wadded up coffee filters, against the 20 mesh screen at the end of the column, and two more on top of the material, between it and the top 20 mesh screen.

I started out by weighing the collection vessel, which weighed 15 pounds 3 ounces.  I then calculated the internal capacity of the 6" diameter X 5" tall collection tank as 141 cubic inches.

I calculated that 141 cubic inches of water at .0361 lbs/inch cubed, times the .601 specific gravity of butane, would weigh about 3 pounds, so an 80% fill would weigh about 2.4 pounds.  That means that 2 pounds 7 ounces is a maxim fill, to allow for hydraulics with temperature changes.

Next I pumped the supply tank down to -29.9hg and after soaking it in an ice water bath for about thirty minutes, sat it on a refrigerant scale to establish the 15 pound, 3 ounce tare.

I  then connected it by hose to the dip tube of a butane supply tank and filled it to a total weight of 17.1 pounds.

Next I connected the collection vessel to the supply tank by hose, and sat the collection  vessel and column in ice water.  I held the supply tank upside down and opened both valves, so that the butane flowed through the material in the column, and collected in the collection vessel.

After a couple of minutes, I weighed the supply tank, and it again weighed 15 pounds, 3 ounces, so I shut all the valves and disconnected the hose.  A minimal amount of butane was lost when I disconnected the hose.

Next I turned the collection tank upside down, so that the butane again saturated the material in the column, and flipped it about four or five times for about 30 minutes, including the final setting the column upright and letting it drain.

I then connected the recovery vessel and the supply tank by hose, and sat the recovery vessel in a 109.4F hot water bath in an electric soup pot, and the supply tank in an ice water bath.

I kept track of the temperature of the fittings on top of the recovery tank and the supply tank with a laser pyrometer, and when the temperature of the fitting on top of the collection tank was 98F and the fitting at the top of the supply tank was 31.1F, I again weighed the supply tank, and found it again weighed 17.1 pounds.

Except for the losses when we disconnected hoses, recovery was 100%, and the losses were not measurable by weight.  I disconnected the system and opened up the collection vessel, to find the attached scene.

Even though I used trim set aside for topical and it was a cleaning run, after inspecting it for petrochemical contaminants with a black light, I still had to taste some and though the material it was extracted from was aged and dried enough to have little floral undertones, it still had a clean crisp hashy flavor.

There were no contaminants revealed under black light, so looks like the system is clean and tomorrow we will have to get serious with some bud!  Hee, hee, hee………………

9-24-12

Lu lu lu lu lu lu lu lu lu lu lu lu!!!!!!!!!!!!!!!!!!!!!!!!!!!  The 6″ X 6″ sanitary spools came in, so here is a new parts list, as well as a picture of the Mk III prototype construction underway using one.

 

No

Item

PN

Qty

Price

Cost

Source

1

1/4 male flare to male NPT

JB-A31484

3

$8.28/5

$8.28

RSD

2

1/4″ 304SS Ball valve 1000#

34-92303

3

$12.05

$36.15

http://www.paramountsupply.com

3

1/4″ 304SS close nipple

34-06105

3

$0.54

$1.62

Paramount Supply

4

1/4″ 304SS 1/2 coupling

34-07136

2

$0.71

$1.42

Paramount Supply

5

1 1/2″ End cap X 1/4″ Fe NPT

NPT25-FM

1

$10.95

$10.95

http://www.GlacierTanks.com

6

1 1/2″ Tri-clamp

CSH-1500

2

 $5.90

$11.80

Glacier Tank

7

1 1/2″ X 6″ Sanitary spool

SP-150-006

1

$29.00

$29

Glacier Tank

8

1 1/2″ Tri-clamp weld ferrule

F150-28

1

$3.90 ea

$3.90

Glacier Tank

9

6″ Sanitary spool end cap

Cap-600

4

$35/ea

$140

Glacier Tank

10

6″ Tri-clamps

CSH-600

4

$25.27

$101

Glacier Tank

11

6″ X 6″ Sanitary spool

Sp-600-012

2

$97

$194

Glacier Tank

12

1 1/2″ Buna-N seals and 20 mesh screens

N/A

2

$15.90

$31.80

http://www.BreweryGaskets.com

13

6″ Buna-N seals

W181663

2

$14.92

$29.84

SustainableSupply.com

14

1/4″ X 36″ Refrigeration hose

 

1

$51

$24.95

Northwaysmachinery

15

Total

 

 

 

$624.71

 

 

GW

8-3-15

Here is a Mk III lid print, which I modified to show the Lil Terp dimensions.

Note that the lid penetrations are given as reference dimensions. That is because there is dimensional tolerance and variability like out of roundness to consider, so I give the machinists the dimensions of what is ostensibly required, along with the actual parts used and the requirement that the parts mate snugly snugly.

GW

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