Ipa Isopropanol purification technique consists of the complying with actions:
S1: Initial testing, initial transport the raw material of isopropanol acetate to the distillation tower for initial distillation, obtain the azeotrope of water and also isopropanol after distillation, then accumulate the azeotrope of water and isopropanol, and also pass the deionization approach Get rid of the steel molecules consisted of in it, and after that dry out through the permeable membrane to obtain commercial grade isopropanol;
S2: Take industrial-grade isopropanol, and afterwards add potassium permanganate and also hydroxide to the within industrial-grade isopropanol. The hydroxide is a mixture of salt hydroxide as well as calcium oxide in any type of proportion, and also mix for 20- thirty minutes, after mixing as well as blending, include ferrous oxide, execute distillation and extraction, thereby acquire key detoxified isopropanol;
S3: Add a metal ion adsorbent to the main detoxified isopropanol, the metal ion adsorbent is turned on carbon, make the mass ratio of the metal ion adsorbent to the primary detoxified isopropanol 0.05:1, as well as stir for 16 minutes, after that stand still for 32 mins, and also filter, so as to obtain sub-purified isopropanol;
S4: Put the sub-purified isopropanol obtained in S3 right into an adsorbent column geared up with changed turned on carbon. The modified activated carbon is triggered carbon with alumina connected to the surface for adsorption treatment to acquire deionized isopropanol;
S5: After that the deionized isopropanol obtained in S4 moves through the water-absorbent material at a consistent circulation price. The type of water-absorbent material is polyacrylic acid-based water-absorbent material. Be listed below 25ppm, hence get dehydration isopropanol;
S6 passes the dried isopropanol acquired in S5 via the reverse osmosis membrane for reverse osmosis therapy, the reverse osmosis stress is 2.4 Mpa, the permeation price is 450L/h, and also the control flow is 780L/h, therefore obtaining reverse osmosis isopropanol;
S7: Do high-temperature correction on the reverse osmosis isopropanol obtained in S6, manage the heating temperature of the fluid in the correction tank to 82 ° C, the reflux ratio to 1.8, and also the condensed water temperature level to 6 ° C, therefore getting the ended up high-purity isopropanol;
S8: Examine the finished high-purity isopropanol, and pack it after passing the test. The packaging method is nitrogen-filled and also sealed.
A prep work approach for high-purity Ipa Isopropanol, comprising the steps:
( 1) Unrefined isopropanol: take acetone and hydrogen as raw materials, take isopropanol as solvent, in the raw material and also solvent mixture, by weight portion, acetone content is 30 ～ 70%, isopropanol content is 30 ～ 65%, at a reaction temperature of 160 ° C as well as a response stress of 3.0 MPa, the raw product is exposured to a stimulant to produce isopropanol, wherein the driver used includes the adhering to parts in regards to weight percent: a) 40 parts of acid-treated silica service provider, and also b) 0.5 to 60 parts of nickel component or its oxides filled thereon, c) 5% MgO;
( 2) Material dehydration: the acquired isopropanol streams through the polyacrylic acid water-absorbent resin at a constant flow rate, as well as the water material of the isopropanol is managed to go down below 20ppm;
( 3) Reverse osmosis: The isopropanol after material dehydration is gone through the reverse osmosis membrane layer, the reverse osmosis stress is 2.0 Mpa, the permeation price is 400L/h, and also the control circulation price is 700L/h;
( 4) High-temperature correction: high-temperature rectification of isopropanol after reverse osmosis, control tower leading temperature of 81.5 ° C, reflux ratio of 1.2-2, condensate temperature level of less than 8 ° C, control of anion concentration in isopropanol after high-temperature rectification To listed below 100ppb, the single cation concentration is regulated listed below 1ppb;
( 5) The product return of isopropanol after correction is 97.5%, and also the purity is 99.6%. The high-purity isopropanol after rectification is crammed in canisters.
CN201010575065.0 has reported a kind of manufacturing method of ultra-high purity Ipa Isopropanol, as well as explained method mainly comprises following handling actions:
( 1) dehydration: the feed stream that will certainly include a minimum of 98% technological grade isopropanol is sent right into molecular sieve adsorption tower, and explained isopropanol enters from the tower bottom of molecular screen adsorption tower, flows out from tower top after molecular screen dehydration, obtains High-purity isopropanol with water material less than 100ppm;
The here and now invention embraces worldwide advanced top quality aluminosilicate 3A high-efficiency molecular sieve (Φ= 2-5mm), which can efficiently absorb
trace moisture in isopropanol, decrease the moisture material of isopropanol from 500ppm to below 50-100ppm, and treat The amount is 0.5 m3/h. The water absorption tool embraces two dehydration adsorption towers, which are used in turning. After one absorbs water close to saturation, it will certainly be restored off-line, as well as the various other will certainly be taken into production. The specification of the molecular filter adsorption tower is Φ400 * 2500, and the quantity of molecular screen for each tower is about 300 litres, which is uniformly filled. The raw material isopropanol gets in the molecular filter from the bottom of the tower, and also drains from the top of the tower after being dried out by the molecular screen. The dehydration temperature level is 20-30 ° C.( 2) Purification: Pass the high-purity isopropanol obtained from the molecular filter adsorption tower with the filter to eliminate bits above 1um;
In the present development, the filter device can be any suitable device efficient in getting rid of particles with a fragment dimension over 1 μm. Preferably, the filter tool is selected from filter membranes, microfiltration tools or cartridges, ultrafiltration tools or mixes thereof. A filter membrane is a straightforward permeable or semi-permeable product where a pressing force is applied to allow two or more substances to travel through it at various prices. This driving force is generally used in the form of a pressure or concentration gradient. The different prices of activity of the various species with the membrane layer are the result of differences in size, solubility or diffusivity, or a combination thereof. Ideal membrane layers include however are not restricted to ceramic membranes, polymer membrane layers, metal membrane layers as well as mixes thereof. Right here, the high-purity isopropanol acquired by the technique of today creation can pass through the filter devices elevated below, and the elimination price of particle matter over 1 μm More than 95%.
( 3) Correction: The qualified high-purity isopropanol after filtering gets in the purification tower to produce isopropanol vapor, then goes through the rectification column, and the clean isopropanol vapor enters the condenser to condense right into high-purity fluid isopropanol. propanol.
An ultra-clean as well as high-purity Ipa Isopropanol high-efficiency, energy-saving and also environmentally-friendly constant production procedure consists of firstly adsorbing industrial-grade isopropanol with a mass percent concentration of 98% from molecular sieves under normal stress as well as a general response setting at a temperature level of 85-90 ° C It goes into from all-time low of the tower, and also drains from the top of the tower after being dried out by the molecular screen adsorption tower to get high-purity isopropanol with a water web content of less than 100ppm. The high-purity isopropanol obtained of the molecular screen adsorption tower is sent to the filter to remove the For bits above 1 μm, the filtered high-purity isopropanol is sent to the distillation tower, heated to 6 ° C listed below the boiling point after correction, and after that enters the condenser, heated again to 10 ° C listed below the boiling point, and gets in condensation In the container, the ultra-clean as well as high-purity isopropanol is gotten after condensation.
