The invention provides a process to separate levulinic acid from a biomass hydrolysate said process comprising extraction using as an organic solvent a substituted benzene comprising (i) at least one OR.sub.1 group wherein R.sub.1 is H or CH.sub.3; and (ii) at least one C.sub.1-3 alkyl group, wherein each of the at least one OR.sub.1 group is ortho positioned to at least one C.sub.1-3 alkyl group. Using said substituted benzene as extraction solvent gives good extraction efficiency, the extraction can advantageously be carried out at elevated temperature, and is very suitable for subsequent distillation steps.

The present disclosure provides phenolic compounds useful in the treatment of neurological conditions such as convulsions and tremors, having the structure of Formula (I):

##STR00001##

wherein R.sup.2, R.sup.4, & R.sup.5, are as defined in the detailed description; pharmaceutical compositions comprising at least one of the compounds; and methods for treating neurological conditions.

The present disclosure provides phenolic compounds useful in the treatment of neurological conditions such as convulsions and tremors, having the structure of Formula (I):

##STR00001##

wherein R.sup.2, R.sup.4, & R.sup.5, are as defined in the detailed description; pharmaceutical compositions comprising at least one of the compounds; and methods for treating neurological conditions.

The present disclosure provides phenolic compounds useful in the treatment of neurological conditions such as convulsions and tremors, having the structure of Formula (I): ##STR00001##
wherein R.sup.2, R.sup.4, & R.sup.5, are as defined in the detailed description; pharmaceutical compositions comprising at least one of the compounds; and methods for treating neurological conditions.

The present invention relates to a new method to produce 2,5-dimethylphenol (2,5-DMP).

The present invention relates to a new method to produce 2,5-dimethylphenol (2,5-DMP).

A preparation method for methylphenol and homologue. Under the conditions of reaction temperature of 150-350 C. and reaction pressure of 1-50 atm, a mixed material of methanol, ethanol and acetone is fed into a reactor containing a catalyst by a carrier gas to produce methylphenol through coupling-aromatization reaction. The method provides a reaction path for directly producing methylphenol and homologue from low carbon micromolecular alcohol and ketone through coupling-aromatization reaction, the maximum selectivity of total cresol is 34.0%, and the selectivity of 2,3,6-trimethylphenol is up to 7.1%. The by-product hydrogen of the reaction path can be used as a chemical material. Other by-products such as high carbon alcohol and ketone whose melting and boiling points are quite different from those of methylphenol and which are easy to be separated by rectification can be used as fuel additives to partially replace petroleum-based products.