Production of two types of starch syrup

First, the conversion syrup

(a) production methods.

1. Mix powder. Add water to the powder mixing bucket and stir it while adding starch material. After the feed is completed, continue adding water to make the concentration of starch milk reach 40%. Then add hydrochloric acid to adjust to the specified pH value.

2. Saccharification. The adjusted starch milk is fed into a saccharification tank with an acid-resistant pump. After the feed is finished, the steam valve is opened so that the pressure in the tank reaches 2.8 kg/cm2. The pressure is maintained for 3 to 5 minutes. Then the sample is taken and the saccharification is checked with 20% iodine solution. end. The saccharification solution can be discharged and neutralized when the iodine solution is red sauce.

3. Neutralization. The saccharification solution was transferred to a neutralization tank for neutralization. Adding quantitative waste charcoal as filter aid immediately after starting stirring, gradually adding 10% sodium carbonate solution to neutralize, mixing uniformly, reaching the desired pH, opening the discharge valve, and pumping the sugar solution Filter. The filtered sugar solution is then sent to the cooling tower where it is decolorized after cooling.

4. Decolorization. The sugar liquid is poured into the decolorization tank, and the quantitative activated carbon is added. The decolorization mixing time shall be no less than 5 minutes (calculated after the barrel is full of sugar) after adding the added activated carbon. Then it will be sent to the filter and the filtered liquid will be put on the filter. Reserve in the barrel.

5. Ion exchange. The first cleansing solution was desalted, purified and decolorized, and the pH was adjusted to 3.8 in a sugar barrel.

6. The first evaporation. After ion exchange, adjust the pH of the sugar solution, pump it to the evaporation tank, keep the vacuum at 500 mmHg or more, the heating steam pressure must not exceed 1 kg/cm2, and control the evaporation concentration of the converted invert syrup to 42 % ~ 50%, this time can be discharged for the second decolorization.

7. Secondary decolorization filtration. After the first evaporation, the converted invert syrup is sent to the decolorization tank, and the quantified amount of fresh activated carbon is added, and the operation is the same as the first decolorization. The secondary decolorization syrup must be refluxed and filtered until no activated carbon particles are available to ensure quality. The clear, colorless, medium invert syrup is then sent to the sugar storage tank.

8. The second evaporation. This operation is basically the same as the first evaporation operation except that after the second evaporation starts, an appropriate amount of sodium bisulfite solution (35 Baume degrees) is added to play a role in bleaching and protecting the color.

Second, the production of maltose maltose maltose syrup is generally the main raw materials, such as rice, broken rice, rice and corn, etc., can also be used potato raw materials. The crushed rice is soaked in water for about 30 minutes and cooked to make it fully gelatinized. The steamed rice temperature is above 100°C. After mixing and cooling, it is cooled down to 80°C. The saccharifying agent is added to mix evenly so that the temperature is maintained at 60°C and saccharified for 6 to 8 hours. After that, the saccharifying agent is again soaked for 2 hours at 70°C. After the first sugar juice is discharged, the first sugar residue is immersed in warm water of 70° C. for about 1 hour, the second sugar juice is squeezed, and the second sugar residue is dipped in warm water once. The first juice, evaporated to a concentration of 80% to 88% is maltose syrup.

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