Pure Sodium Chloride CAS 7647-14-5

( 1) Prepare a salt water consisting of at the very least 150 g/l sodium chloride by liquifying a resource of sodium chloride in water;

( 2) Cool the resulting brine to a temperature level below 0 ° C however above the eutectic temperature of the resulting brine by indirect cooling in a self-cleaning fluidized bed cozy exchanger/crystallizer, as a result producing a sodium chloride dihydrate having The slurry and mommy alcohol of the item, the brine does not have any type of type of solid sodium chloride according to the nude eye;

( 3) Dividing the sodium chloride dihydrate established in step (2) at the eutectic temperature level such that a stream rich in sodium chloride dihydrate is established;
( 4) Feed sodium chloride dihydrate right into the recrystallizer to create sodium chloride and mama alcohol.

A part of 1,200 g of a 26 wt% NaCl treatment (prepared by liquifying a pharmaceutical quality salt in demineralized water at space temperature degree) was positioned in a jacketed glass vessel and cooled down utilizing a Syltherm 800 for cooling. Listed below 0 ° C, sodium chloride dihydrate begins to form. Air conditioning was quit at -19 ° C. Just one strong phase is created. When blending is stopped, the crystals sink to the bottom of the container. The crystals developed were separated by filtering off the mother alcohol. The mother alcohol was examined for NaCl web content (by weight) and located to consist of 23.6% by weight of NaCl.

Sodium chloride dihydrate crystals were put in a float and the temperature level was improved to 10 ° C. The crystals begin to recrystallize right into anhydrous sodium chloride. Part of the sodium chloride item dissolves in the released crystal water, so some saturated brine kinds. The crystals are divided from the brine by purification with a glass filter and are of high pureness.

At area temperature level, add 20 ml of ethanol to 50 ml of Pure Sodium Chloride saturated fluid solution. After blending for two mins, add 50 ml of 31% concentrated hydrochloric acid and permit the remedy to settle for half an hour. Pour out the leading fluid and completely dry it in a vacuum drying out cooktop at 110 ° C to prepare Obtain micron-level ultrafine sodium chloride powder.

Make use of an optical microscopic lense to observe the particle measurement of the crystals prepared in this circumstances: when the ethanol dosage is 20 ml, the bit size of sodium chloride is 8-10 μm; the condensation return is 86%.

At room temperature degree, mix 742g calcium chloride and 1000mL saturated sodium chloride solution completely for 2 hours, keep mixing, take an example and filter, and find the calcium ion emphasis in the filtrate C = 211.94 g/L, so Pure Sodium Chloride is basically sped up in the filtrate., add 1 mg of potassium ferrocyanide and mix for 0.5 h, filter, clean the filter cake 3 times with 300 mL of saturated sodium chloride solution, collect the strong, and ultimately dry it in a vacuum cleaner drying stove to obtain micron-grade sodium chloride at a temperature level of 80 ° C. The calcium ion focus in the filtrate was determined utilizing the very same approach and C = 117.74 g/L. The filtrate was 1800mL. Mix the filtrate and include 731.73 g of salt sulfate and proceed stirring. The sodium sulfate gradually liquified and a large quantity of white microemulsion powder was used to speed up. Mix for 2 hours and after that take an example. Filter, established the calcium ion focus C=0.56 g/L in the filtrate, filter, clean the filter cake with 100 mL of water, collect the solid, and finally totally dry it in a vacuum cleaner drying out stove to get micron-grade calcium sulfate, the temperature degree is 120 ° C.

At location temperature, include 50 ml of ethanol to 50 ml of Pure Sodium Chloride saturated liquid treatment without adding a modifier, mix for half an hour, swiftly filter to gather the crystals, and dry in a vacuum drying stove at 80 ° C.

Check the surface area morphology and identify the bit dimension taking advantage of a scanning electron microscopic lense (SEM).

When ethanol in different percentages is used as an antisolvent to prepare ultrafine sodium chloride, the little bit dimension distribution of sodium chloride is around a few microns. When the ethanol dose is 50 ml, the bit dimension of Pure Sodium Chloride is 7.07 μm; the main condensation yield is 41.4%.