Abstract:
Disclosed is a process for preparation of an aromatic thiol corresponding to the structure A-(SH)n wherein A is a substituted or unsubstituted aromatic radical and n is 1, 2, 3, 4, 5 or 6 comprising contacting at a temperature of at least 80 °C an aromatic halide corresponding to the structure A-Xm wherein A is the same as above, X is bromine or iodine and n is 1, 2, 3, 4, 5 or 6 with thiourea in the presence of nickel.
Abstract:
A process for producing a copoly(arylene sulfide) corresponding to the structure [(-A-S-)1-x(-A-S-S-)x]n, wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.5 to 0.0001 and n is at least 200, comprising reacting within a reaction zone a mixture of a diiodoaromatic compound and elemental sulfur at a polymer producing temperature wherein the reaction zone contains an oxygen-containing gas flowing at a rate in the range of 0.001 to 0.08 ft3/hr/mol of oxygen per mole of sulfur.
Abstract:
A process for preparation of a copoly(arylene sulfide) which has a decreased amount of disulfide radicals and corresponds to the structure: [(-A-S-)1-x(-A-S-S-)x]n wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.45 to 0 and n is at least 50, comprising contacting a copoly(arylene sulfide) corresponding to the structure [(-A-S-)1-x(-A-S-S-)x]n wherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.50 to 0.001 and n is at least 25, in the melt phase with a diiodoaromatic compound corresponding to the structure I-A-I wherein A is a divalent substituted or unsubstituted aromatic radical.
Abstract:
Disclosed is a process for the co-production of aromatic carboxylic esters and alkyl iodides by the carbonylation of aromatic iodides in the presence of an ether and a palladium catalyst.
Abstract:
A process for preparing a copoly(arylene sulfide) corresponding to the structure: [(-A-S-)1-x(-A-S-S-)x]n, wherein x is in the range of 0.5 to 0.001 by reacting a mixture of a diiodoaromatic compound and elemental sulfur in the presence of a catalytic amount of iron.
Abstract:
A process for preparing a copoly(arylene sulfide) corresponding to the structure [(-A-S-)1-x(-A-S-S-)x]n, wherein x is in the range of 0.5 to 0.001 by reacting a mixture of a diiodoaromatic compound and elemental sulfur in the absence of a basic material and in the presence of a catalytic amount of an organic amine-containing compound.