Gossypol removal by adsorption from cottonseed miscella

Abstract

A variety of aluminas (acidic, basic, and neutral), silica, and synthetic magnesium silicates were screened to evaluate their potential use as adsorbents for reducing the content of gossypol and related compounds from hexane-based cottonseed miscella. Among the tested adsorbents, one type of silica and two types of magnesium silicate with a relatively high Brunauer-Emmet-Teller (BET) surface area (≥240 m 2 /g) showed a superior adsorption capacity in reducing gossypol from hexane miscella. As a possible regenerating method for the spent adsorbents, washing with acetone was tested. The effect of pH in the washing solvent was also evaluated. Adsorbents that were regenerated by washing with acetone at pH values between 7 and 7.5 performed better than those at pH values between 6.5 and 7. The pH values of washing solvent were adjusted by using a small amount of caustic and 1 M HCl.Paper no. J11047 in JAOCS 82, 905-909 (December 2005).

Soapstock and deodorizer distillates from North American vegetable oils: Review on their characterization, extraction and utilization

“…As discussed earlier, in order to produce cottonseed edible oil, gossypol is typically removed during the oil refining process and ends up in the soapstock. Therefore, soapstock has to be added in a limited amount (Kuk & Tetlow, 2005) since 0.1% of gossypol is the upper limit that chickens can absorb without having growth rate problems (Lipstein & Bornstein, 1964a). A comparative study between acidulated cottonseed and soybean soapstocks in chicken feed has shown that chicken lipid oxidation is lower when the animals are fed with acidulated soybean soapstock (Bartov, Lipstein, & Bornstein, 1974).…”

Preparation and evaluation of molecularly imprinted polymer for selective recognition and adsorption of gossypol

“…Hence, to remove gossypol from cotton seed products is crucial. For this purpose, different methods have been developed, including solvent extraction treatment, ferrous sulfate treatment, microbes fermentation, and adsorption treatment . Among them, adsorption approach has some advantageous characteristics, such as simple operation and low cost.…”

“…Among them, adsorption approach has some advantageous characteristics, such as simple operation and low cost. Along this line, alumina, silica, and synthetic magnesium silicates were studied as adsorbents target gossypol . However, functional materials based on molecularly imprinted polymers (MIPs) with high specificity and selectivity has been rarely reported.…”

Synthesis of Alumina-Containing Hexagonal Mesoporous Silica and Its Application in the Adsorption of Gossypol

“…In order to efficiently removal gossypol from cottonseed oil, a number of studies have been carried out, usually through caustic reining 7 and adsorption on solids, such as activated alumina 8 and activated montmorillonite-containing clays 9 . Richard et al 10 investigated that aluminas and silicas as adsorbents for reducing the gossypol from cottonseed oil, they found gossypol has a high affinity for alumina surface.…”