H s removal from gas streams

H.sub.2s removal process

H.sub.2s removal with oxidizing polyvalent metal chelate and...

H2s absorption with subsequent oxalate removal

Halide scavengers for high temperature applications

Halohydrination process

Hardened gum formed-in-place membranes

Hardened molecular sieve agglomerates and manufacture thereof

Hardness suppression in urea solutions

Hazardous waste treatment method and apparatus

Head for spinning band fractionator

Head plate

Header arrangement for hydrocyclones having concentric...

Header for module of hollow fiber membranes and method of...

Header for stagnation-sensitive liquids

Health guard fat skimmer

Heat and moisture exchange device

Heat disinfection of a water supply

Heat exchange apparatus

Heat exchanger