Disclosed are a dry starch used in a field of biodegradable plastics, and a preparation method and use thereof. The dry starch used in a field of biodegradable plastics is prepared by removing moisture from a commercial starch, wherein the dry starch has a moisture content of not greater than 5 wt %; and starch granules have an internal organizational structure mainly in an amorphous form.

Disclosed are a dry starch used in a field of biodegradable plastics, and a preparation method and use thereof. The dry starch used in a field of biodegradable plastics is prepared by removing moisture from a commercial starch, wherein the dry starch has a moisture content of not greater than 5 wt %; and starch granules have an internal organizational structure mainly in an amorphous form.

A method for preparing a legume starch with a high slowly digestible fraction content (SDS), a hydrothermal treatment method wherein it comprises the following steps: 1) preparing a starch milk with a dry matter content of between 30 and 40% by weight; 2) heating the starch milk prepared in this way to a temperature of between 50 and 60? C., preferably 55? C., in a continuous reactor so that the residence time of the starch milk is less than 5 minutes, preferably less than 2 minutes; and 3) recovering, filtering and drying the starch milk treated in this way.

A method for preparing a legume starch with a high slowly digestible fraction content (SDS), a hydrothermal treatment method wherein it comprises the following steps: 1) preparing a starch milk with a dry matter content of between 30 and 40% by weight; 2) heating the starch milk prepared in this way to a temperature of between 50 and 60? C., preferably 55? C., in a continuous reactor so that the residence time of the starch milk is less than 5 minutes, preferably less than 2 minutes; and 3) recovering, filtering and drying the starch milk treated in this way.

The technology disclosed in this specification pertains to methods of making thermally inhibited starch and flour using microwave heating. Using microwave heating methods, thermally inhibited starch and flour can be obtained in less time and at lower temperatures than are needed to make similar inhibited starch or flour using forced air heating methods. Also disclosed are thermally inhibited starches and flours obtained from the methods and compositions using such thermally inhibited starches and flours.

The technology disclosed in this specification pertains to methods of making thermally inhibited starch and flour using microwave heating. Using microwave heating methods, thermally inhibited starch and flour can be obtained in less time and at lower temperatures than are needed to make similar inhibited starch or flour using forced air heating methods. Also disclosed are thermally inhibited starches and flours obtained from the methods and compositions using such thermally inhibited starches and flours.

Methods for preparing thermally inhibited starch agglomerates are disclosed. Thermally inhibited starch agglomerates prepared by this method provide a higher viscosity over thermally inhibited starches that are not agglomerated but are thermally inhibited in the same manner as the thermally inhibited starch agglomerates.

Methods for preparing thermally inhibited starch agglomerates are disclosed. Thermally inhibited starch agglomerates prepared by this method provide a higher viscosity over thermally inhibited starches that are not agglomerated but are thermally inhibited in the same manner as the thermally inhibited starch agglomerates.

A method of preparing an oxidized starch haemostatic material, including adding a starch raw material to an external circulation pulsatile reactor; switching on a pump to allow inflow of dry air for drying the raw material; switching on a heat exchanger; vacuumizing the reactor; opening a nitrogen dioxide pipeline and a dry air pipeline; pumping in a mixed gas; controlling temperature at 0-120 C. by the heat exchanger; wherein nitrogen dioxide is contacted with the raw material to trigger a selective oxidation reaction and is continuously recycled; an airflow circulation switch is switched on and off at a pulsating ratio of 1:1-10 to carry out airflow pulsation; stopping inflow of nitrogen dioxide and continuing airflow circulation for 5-30 minutes; after completion of the reaction, adjusting to room temperature; vacuumizing the reactor and treating exhaust gas; allowing nitrogen gas to flow in for rinsing the replaced reactor until completion.

A method of preparing an oxidized starch haemostatic material, including adding a starch raw material to an external circulation pulsatile reactor; switching on a pump to allow inflow of dry air for drying the raw material; switching on a heat exchanger; vacuumizing the reactor; opening a nitrogen dioxide pipeline and a dry air pipeline; pumping in a mixed gas; controlling temperature at 0-120 C. by the heat exchanger; wherein nitrogen dioxide is contacted with the raw material to trigger a selective oxidation reaction and is continuously recycled; an airflow circulation switch is switched on and off at a pulsating ratio of 1:1-10 to carry out airflow pulsation; stopping inflow of nitrogen dioxide and continuing airflow circulation for 5-30 minutes; after completion of the reaction, adjusting to room temperature; vacuumizing the reactor and treating exhaust gas; allowing nitrogen gas to flow in for rinsing the replaced reactor until completion.