Production Process of Maltitol

1. Two parts of the production process of maltitol

Maltitol provided by maltitol suppliers is a disaccharide alcohol produced by hydrogenation and reduction of maltose. Industrially, its production process can be divided into two parts. The first part is to hydrolyze starch into high maltose syrup, and the second part is to hydrogenate and reduce the prepared high maltose syrup to make maltitol.

2. The process flow of maltitol

(1) Mixing

First add a certain amount of water to the mixing tank, start the mixer, and gradually add starch to adjust the starch to a starch milk with a concentration of 10% to 20%. Stir fully when mixing to prevent agglomeration. After the starch is completely mixed, add about 0.1% soda ash and adjust the pH to 6.0-6.4. In order to improve the activity of amylase, add 0.2%-0.5% (for starch) calcium chloride and then stir well.

(2) Liquefaction

Put the adjusted starch milk into the storage tank, and the amylase content is calculated based on 5U/g starch. At the same time, the temperature is increased immediately above 100°C and stay for 5 minutes, and the enzyme is inactivated at high temperature. The starch liquefied liquid after high temperature treatment has good dispersibility and is not easy to undergo condensation, which is conducive to the saccharification operation.

(3) Saccharification

Cool the liquefaction to 45～50℃, adjust the pH to 5.8～6.0, add isoamylase 20U/g starch and fresh bran, 13-amylase 10U/g starch, and put it in saccharification for 30～40h. After that you will get a saccharification liquid of 80%～95% maltose and 5% to 15% maltotriose.

(4) Filter press

Use a plate and frame filter press to filter with diatomaceous earth or crushed pearlite as filter aids until a clear filtrate is obtained.

(5) Decolorization

Add powdered activated carbon at 0.5-1.0% of the dry matter of the filtrate, and mix the activated carbon with the same amount of filtrate before adding, so that it is easy to mix the activated carbon. First mix the diatomaceous earth with a small amount of saccharification liquid, and then use a pump to pump into the filter. The pressure is required to be below 0.1MPa, so that the diatomaceous earth is evenly deposited on the filter surface, and the filtrate that is initially filtered is unclear, and it is refluxed go to the decolorization tank until the liquid is clear, close the return pipe, and send the filtrate to the storage tank. The filtration pressure should be controlled at 0.2 ~ 0.3MPa.

(6) Ion exchange

Choose strong acid cation resin and strong basic anion resin. Before use, the ionic resin is immersed and expanded, and then loaded into the anion and cation columns respectively, and then can be used after pickling, alkali washing, and water selection. The flow rate is controlled to be about 700kg/h, the temperature is about 40℃. The length of the resin making cycle depends on the impurity content in the syrup, and the higher the impurity quality, the shorter the service cycle.

(7) Vacuum concentration

The vacuum degree is maintained at 0.086-0.092MPa, the maltitol liquid temperature is about 50-53°C, the vacuum degree is not less than 0.066MPa, and the steam pressure is controlled at 0.2-0.3MPa. Concentrate to a solid content of 40-60%, stop steam and vent, and then it can be used as a raw material for preparing maltitol like maltitol syrup.