Clay minerals from Russian deposits proved sufficiently higher catalytic ability to convert MBOH despite the deactivation (Fig.
Comparison of the catalytic ability of both groups of samples from Russian and Jordanian deposits gives a general sequence for values of MBOH conversion: palygorskite > kaolinite-R > zeolite-J > bentonite-J > hydromica > red kaolinite > H-ZSM-5 > white kaolinite > diatomite.
As it follows from the Figures 5a and 5b, the typical products of MBOH conversion over studied clay minerals are MBYNE, prenal, acetone and acetylene apart from synthetic zeolite H-ZSM-5.
However, sufficient amounts of basic products formed during MBOH conversion prove essential contribution of basic centers to the general concentration of surface centers, except for HZSM-5.
In order to track changes of surface acidity/basicity of kaolinite as well as its catalytic ability towards MBOH conversion we carried out catalyst activation at a higher temperature (700[degrees]C).
Natural clay samples from Russian deposits with different content of montmorillonite were tested in reaction of MBOH conversion in order to compare their surface acidity.
The reaction ran via both acidic and basic pathway of MBOH conversion forming MBYNE, acetylene and acetone as main products.
Increase in natural basicity of surface of rich with montmorillonite samples or formation of additional basic sites (O- atoms) by high activation temperature of catalysts were the reasons of growth of MBOH conversion.