Dispersant for vinyl acetate unit fouling
AssigneeNalco Chemical Company
InventorAllen R. Syrinek
Life of this patent
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Abstract
A dispersant for vinyl acetate process streams has been found, which dispersant acts as an antifoulant, preventing formation of fouling tars, polymers, debris, and the like, in the process streams involved in the manufacture of vinyl acetate monomer. The antifoulant/dispersant is primarily composed of hydrocarbonaceous sulfonic acids which may optionally be admixed organic polar solvents and tall oil fatty acids.
Claims10
A method of inhibiting the formation of tars, gums, and foulants in vinyl acetate monomer manufacturing and recovery equipment which comprises adding to the liquid or gaseous phases contained therein an effective antifouling amount of an antifoulant, said antifoulant having the structure:
- R--SO-.sub.3).sub.n M
- wherein;
- R is a hydrocarbonaceous group having from 1-34 carbon atoms chosen from linear or branched alkyl groups, aromatic, cyclic, alkaryl, aralkyl, or alkenyl groups, alkyl diphenyl ether groups, dialkyl naphthalene groups, or mixtures thereof;
- M is chosen from the group consisting of H, alkali metals, alkaline earth metals, ammonium cations, alkyl ammonium cations, or mixtures thereof;
- and n ranges from 1 to about 6.
A method of inhibiting the formation of tars, gums, and foulants in vinyl acetate monomer manufacturing and recovery equipment which comprises adding to the liquid or gaseous phases contained therein an effective anti-fouling amount of an antifoulant chosen from the group consisting of toluene sulfonic acid, methane sulfonic acid, dodecylsulfosuccinic anhydride, dodecylsulfosuccinic acid, dioctyl sulfosuccinate, dodecylbenzene sulfonic acid, methane sulfonic acid, toluene sulfonic acid, dodecylsuccinic anhydride, and alkyl-substituted diphenylether which has been sulfonated to obtain two sulfonic acid groups, one on each aromatic structure, as represented in the following formula:
- ##STR3## wherein R is a linear or branched alkyl group having from 4-16 carbon atoms, and the sum of m+n is at least 2;
- a dialkyl substituted naphthalene sulfonic having the formula:
- ##STR4## wherein R, at each occurrence, is a linear or branched alkyl group having from 4-12 carbon atoms;
- and salts thereof, and mixtures thereof.
Dependencies are inferred from the claim text.