Magnesium silicate absorbent (xMgO·ySiO₂·nH₂O) is an amorphous porous, white freely flowing granule or powder. As an amphoteric adsorbent, it has been extensively used in aftertreatment of polyether polyol to remove K ⁺ (Na ⁺ ) ion, acid, alkali, pigments and odorous compounds containing sulfur and nitrogen atom.

Magnesium silicate

xMgO·ySiO₂·nH₂O

White, odorless, freely flowing granule or powder

≥65.0

≥14.0

≤15

8～10

300-600

≥90

Add the crude polyether polyol and 1~5% (w/w) of water into reactor at a certain temperature, generally control the temperature of reactant below 80℃, and adjust pH to 4~6 with 85% phosphoric acid. After neutralization, add 0.1~0.5% (base on the weight of polyether polyol) of magnesium silicate adsorbent or mixed adsorbent (magnesium silicate: aluminum silicate=1:1 (w/w), heat up to a suitable temperature (e.g.: 110±5℃) and allow to dehydrate at a certain vacuum value. Filter to remove absorbent by circulation method under proper condition (such as 110±5℃, 2~4KPa) , finally collect the clarified and transparent filtrate to obtain qualified polyether polyol product when the moisture content (such as less than 0.1%) and K + (Na+ ) ion concentration conform to the specification of polyether polyol.

Package in the coated paper bag lined with soft plastic-film bag, net weight 20kg/bag. Arrange bulk transports according to the specific requirements. Keep in a dry, clean, cool warehouse. Pay attention to moisture and rain. Any unused product should be sealed after opening the bag.

Magnesium silicate oil filter aid (xMgO·ySiO2·nH2O) is an amorphous porous, white freely flowing granule or powder. As an amphoteric adsorbent, it has been extensively used in frying oil or edible oil production process. Magnesium silicate oil filter aid performs well to remove fatty acids, alkaline pigment, soap, phospholipids and some odorous compounds containing sulfur and nitrogen atom, so that the acid value, carbonyl value, saponification value, total polar material and color of edible oil can be controlled at a certain low value.

Magnesium silicate

1343-88-0

xMgO·ySiO₂·nH₂O

White, odorless, freely flowing granule

≥65.0

≥14.0

≤20

8～10

300-600

≥90

Add untreated oil and 0.5~2% (base on the weight of untreated oil) of magnesium silicate oil filter aid into reactor by vacuum method to prevent from dust, carry out vacuum-adsorption processing under condition of a certain temperature (90~120℃) and vacuum value for about 20~30min. Allow treated oil to cool to about 70℃, filter remove absorbent by the circulation method, and finally obtain refined oil, the filtrate, when the oil is clarified and transparent and conform to edible oil specification.

Package in the coated paper bag lined with soft plastic-film bag, net weight 20kg/bag. Arrange bulk transports according to the specific requirements. Keep in a dry, clean, cool warehouse. Pay attention to moisture and rain. Any unused product should be sealed after opening the bag.