Abstract: A process for preparing adipic acid from cyclohexene oxide comprising the following steps (a) and (b):(a) hydrating cyclohexene oxide to obtain 1,2-dihydroxycyclohexane and an oligomers represented by formula (I): ##STR1## wherein n represents a number of from 1 to 5 in number average, and (b) oxidizing the 1,2-dihydroxycyclohexane and the oligomers represented by formula (I) in a nitric acid aqueous solution.

Abstract: A belt comprises a plurality of metal elements. Each element has a pair of contact sides engaged with pulleys. The contact side is inclined at the same slope angle as that of the pulley. The length of the contact side is different from a length of a perpendicular opposite an angle in a right-angle triangle. The angle is equal to the slope angle, and the right-angle triangle has a hypotenuse between uppermost points of both the contact sides.

Abstract: A belt for a belt drive device is composed of a plurality of metal elements arranged on a pair of carriers. The elements consist of two or more kinds which are divided along thickness. The mixing ratio of the thinner element to the thickest element is less than fifty percent, and the elements are arranged at random.

Abstract: A process for producing a hydrocarbon fluoride at a high selectivity with minimum formation of by-products is disclosed, which comprises reacting a hydrogen-containing hydrocarbon halide with anhydrous hydrogen fluoride in a liquid phase in the presence of a reaction product of (i) at least one of (a) an oxygen-containing compound selected from the group consisting of H.sub.2 O, H.sub.2 O.sub.2 and an oxygen-containing organic compound, and (b) a nitrogen-containing compound selected from the group consisting of NH.sub.3 and a nitrogen-containing organic compound, (ii) a tin compound selected from the group consisting of a stannic halide, a stannic oxyhalide and an organotin compound, and (iii) anhydrous hydrogen fluoride.

Abstract: An infinitely variable belt-drive transmission is provide with a D/L-range as one of operating ranges. The system has a transmission ratio control valve comprising a spool which is moved in the downshift direction to downshift the transmission and in the upshift direction opposite to the downshift direction to upshift the transmission. An actuator is provided for moving the spool. When an accelerator pedal of a motor vehicle is depressed at the D/L-range, the actuator operates to move the spool in the downshift direction and when the accelerator pedal is released at the D/L-range, the actuator operates to move the spool in the upshift direction.