Abstract: After an aqueous solution containing, at a concentration of less than 40% by mass, an organic compound having two or more hydrophilic groups in a molecule is adjusted to contain the organic compound at a concentration of equal to or greater than 40% by mass, the aqueous solution whose organic compound concentration is adjusted to equal to or greater than 40% by mass is irradiated with an ultrasonic wave to atomize water, and is dehydrated and concentrated.
Abstract: There is provided a process for the preparation of a polymerizable composition comprising a cross-linker and a polymerizable monomer of formula (I) comprising (i) contacting a compound of formula (II) with an acid such as an imobilized acid; and (ii) neutralizing product of (i) such that a crosslinker is formed.
October 15, 2001
April 11, 2002
Barry Charles Holdstock, Trevor Owen Glasey
Abstract: Delayed release flavorant compositions containing flavor-release additives, namely 1,2-diols of the formula
wherein R1 is one of the radicals
R2 is H, lower alkyl
R3, R4 are H, lower alkyl, lower alkoxy, hydroxy, or R3+R4 together are methylenedioxy,
R5 is lower alkyl
and the broken lines represent in the ring one additional bond
and in the side chain an optional bond.
Abstract: This invention relates to an improved process for the dehydration of 2,5-dimethyl-2,5-hexanediol to give good yields of 2,5-dimethyl-2,4-hexadiene with a minimum of by-products. This is accomplished by heating 2,5-dimethyl-2,5-hexanediol with a montmorillonite clay catalyst, preferably in the presence of a lower aliphatic alcohol.
Abstract: 2,5-Dimethyl-2,4-hexadiene is prepared by dehydrating 2,5-dimethyl-2,5-hexanediol in liquid phase. The reaction takes place by contacting 2,5-dimethyl-2,5-hexanediol, melted or dissolved in an appropriate solvent, with acids, heating the mixture at a temperature of 100.degree. C.-160.degree. C. and distilling off water from the reaction environment as it is being formed. The pressure can range between 1 and 10 bars.
Abstract: A process for producing isoprene, which comprises decomposing a mixture of at least two compounds represented by the general formula ##STR1## wherein (i) W and Y each represent a hydrogen atom, and X and Z are identical or different and each represent the group OR, (ii) W and X together form a single bond, Y represents a hydrogen atom and Z represents the group OR, (iii) W represents a hydrogen atom, X and Y together form a single bond, and Z represents the group OR, or (iv) W represents a hydrogen atom, X represents the group OR, and Y and Z together form a single bond, in which R represents a hydrogen atom, a methyl group, a methoxymethyl group, a methylbutenyl group, a methylbutenyloxymethyl group, a 1,1-dimethyl-3-hydroxypropyl group, a 1,1-dimethyl-3-hydroxypropyloxymethyl group, a 3-methyl-3-hydroxybutyl group, a 3-methyl-3-hydroxybutyloxymethyl group, a 1,1-dimethyl-3-methoxypropyl group, a 1,1-dimethyl-3-methoxypropyloxymethyl group, a 3-methyl-3-methoxybutyl group or a 3-methyl-3-methoxybutyloxymethy
Abstract: A process for producing a conjugated diene represented by the general formula ##STR1## wherein R.sub.3, R.sub.4 and R.sub.5 each represent a hydrogen atom, or any one of them represents a methyl group and the other two each represent a hydrogen atom,which comprises heating an alkane-1,3-diol represented by the general formula ##STR2## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom, or one of them represents a hydrogen atom and the other represents a methyl group,to a temperature of at least 130.degree. C. in the liquid phase in the presence of water and a boron-oxyacid or an oxygen-containing boron compound capable of forming a boron-oxyacid it under the reaction conditions.