CN1377915A - Process for producing sodium polyacrylate and amino trimethylene phosphonate as anti-scale agent of sugar-making evaporation tank - Google Patents

Abstract

The antiscale is used to prevent scale is sugar making evaporation tank. It consists of sodium polyacrylate and amino trimethylene phosphonate in the weight ratio of 2-5 to 0.5-1.5. The sodium polyacrylate is prepared through dripping acrylic acid and water solution of ammonium sulfate into water solution of sodium hypophosphorite and adding liquid alkali. The amino trimethylene phosphonate is prepared through adding formaldehyde into the reactor of ammonium bicarbonate, adding phosphorus trichloride, heating and other courses. The present invention may be used in preventing scale inside available sugar making evaporation tank.

Description

Sugaring evaporating pot scale inhibitor, sodium polyacrylate, Amino Trimethylene Phosphonic Acid manufacture method

The present invention relates to a kind of scale inhibitor and raw materials used manufacture method thereof, particularly a kind of sugaring evaporating pot scale inhibitor, sodium polyacrylate, Amino Trimethylene Phosphonic Acid manufacture method.

Existing sugaring evaporating pot, owing to there is not scale inhibitor, so scale velocity is very fast, the thermo-efficiency of evaporating pot is very low, waste energy, and the discharging of brush jar waste liquid can cause environmental pollution again, is unfavorable for environmental protection.

The object of the present invention is to provide a kind of sugaring evaporating pot scale inhibitor and sodium polyacrylate, Amino Trimethylene Phosphonic Acid manufacture method manufacture method, can save the scale velocity of sugaring generation tank greatly, improve the thermo-efficiency of evaporating pot, help environmental protection in the time of save energy again.

The object of the present invention is achieved like this

Sugaring evaporating pot scale inhibitor, its composition comprises: sodium polyacrylate, Amino Trimethylene Phosphonic Acid, described sodium polyacrylate and three methene phosphonic weight ratios are 2-5: 0.5-1.5.

The manufacture method of above-mentioned sodium polyacrylate:

A. in reactor, add vinylformic acid;

B. in another reactor, add water and Ammonium Persulfate 98.5, make its dissolving;

C. in the 3rd reactor, add entry and inferior sodium phosphate, open stirring, when temperature is raised to 70-90 and spends, the solution in preceding two reactors is dripped in the 3rd reactor simultaneously;

D. after dropwising, be incubated 0.5-1.5 hour, cool to the 20-40 degree after, add liquid caustic soda.

The manufacture method of above-mentioned Amino Trimethylene Phosphonic Acid:

A. in reactor, add bicarbonate of ammonia, stir and be warmed to the 20-40 degree;

B. formaldehyde is dripped in last reactor;

C. then phosphorus trichloride drench in the last reactor is added, and the processing of lowering the temperature simultaneously;

D. heat to the 90-110 degree after treating all to dropwise, be incubated 1-3 hour, be heated to the 110-130 degree then and begin to strengthen steam and dash steaming;

E. the cooling of lowering the temperature gets final product.

The invention has the advantages that:

1. sugaring evaporating pot scale inhibitor can slow down the evaporating pot scale velocity, improves evaporating pot thermo-efficiency, and save energy prolongs about one to two times of running period.

2. need about 45 days brush single vaporization jars before not using scale inhibitor, reach more than 130 day brush of continuous operation single vaporization jar after the use scale inhibitor, realized not shutting down during the whole production; reduced brush jar number of times; reduce brush jar discharging of waste liquid, helped environmental protection, increased economic benefit.

3. use scale inhibitor, but annual factory save energy and reduce brush jar number of times and benefit nearly 1,000,000 yuan can further reduce turbine back pressure, thereby further improve generated energy, and evaporating pot incrustation is thin, and loose easy cleaning is saved manpower, from and save financial resources.

Embodiment 1:

Sugaring evaporating pot scale inhibitor, its composition comprises: sodium polyacrylate, Amino Trimethylene Phosphonic Acid, described sodium polyacrylate and three methene phosphonic weight ratios are (2 or 3 or 4 or 5): (0.5 or 1 or 1.5).

Embodiment 2:

The production method of embodiment 1 described sodium polyacrylate is:

A. in reactor, add vinylformic acid, can use vacuum pump suction 180kg vinylformic acid;

B. in another reactor, add water 120kg and Ammonium Persulfate 98.5 4.5kg, make its dissolving;

C. in the 3rd reactor, add entry 400kg and inferior sodium phosphate 2.5kg, open stirring, when temperature is raised to 70 or 80 or 90 when spending, solution in preceding two reactors is dripped in the 3rd reactor simultaneously, Dropwise 5 hour, lower the temperature when spending above 90, temperature is controlled at about 80 degree as temperature;

D. after dropwising, be incubated 0.5-1.5 hour, lower the temperature, temperature is controlled at about 20 or 30 or 40 degree, add liquid caustic soda 260kg, measure the pH value temperature and be strict controlled in about 30 degree, make the molecular weight equilibrium;

Discharging then, filtration, packing get final product.

Embodiment 3:

The manufacture method of embodiment 1 described sugaring evaporating pot scale inhibitor, the production method of described Amino Trimethylene Phosphonic Acid is:

A. in reactor, add bicarbonate of ammonia 600kg, stir and be warmed to 20 or 30 or 40 degree;

B. formaldehyde is dripped in last reactor, also formaldehyde 300kg can be put in another reactor and in last reactor, drip, approximately dripped 40 minutes, temperature is strict controlled in 40 degree during this time, and is after aforementioned the dropwising, that phosphorus trichloride 100kg is slow in the last reactor, the temperature of control reactor is in 30 degree, and the processing of lowering the temperature simultaneously, mainly, dripped about 10 hours with the cool brine cooling that circulates;

C. after treating all to dropwise reactor slowly is heated to 90 or 100 or 110 degree, is incubated 2 hours, be heated to 110 or 120 or 130 degree then, begin to strengthen steam and dash about 8 hours of steaming;

D. lowering the temperature then is cooled to 30 degree and get final product, can the sampling analysis pH value mensuration whether qualified.

Claims (3)

1. sugaring evaporating pot scale inhibitor, its composition comprises: sodium polyacrylate, Amino Trimethylene Phosphonic Acid is characterized in that: described sodium polyacrylate and three methene phosphonic weight ratios are 2-5: 0.5-1.5.

2. the manufacture method of the sodium polyacrylate described in the claim 1 is characterized in that:

A. in reactor, add vinylformic acid;

B. in another reactor, add water and Ammonium Persulfate 98.5, make its dissolving;

C. in the 3rd reactor, add entry and inferior sodium phosphate, open stirring, when temperature is raised to 70-90 and spends, the solution in preceding two reactors is dripped in the 3rd reactor simultaneously;

D. after dropwising, be incubated 0.5-1.5 hour, cool to the 20-40 degree after, add liquid caustic soda.

3. the manufacture method of the Amino Trimethylene Phosphonic Acid described in the claim 1:

A. in reactor, add bicarbonate of ammonia, stir and be warmed to the 20-40 degree;

B. formaldehyde is dripped in last reactor;

C. then phosphorus trichloride is dripped in last reactor, and the processing of lowering the temperature simultaneously;

D. heat to the 90-110 degree after treating all to dropwise, be incubated 1-3 hour, be heated to the 110-130 degree then and begin to strengthen steam and dash steaming;

E. the cooling of lowering the temperature gets final product.