Chemical companies must produce as much product as possible ATOM ECONOMY

Chemical companies must produce as much product as possible - use reactions with a high yield - make as least waste as possible ATOM ECONOMY

Chemical companies must produce as much product as possible - use reactions with a high yield - make as least waste as possible Good news for: ATOM ECONOMY

Chemical companies must produce as much product as possible - use reactions with a high yield - make as least waste as possible Good news for: * company profits * environment - uses less of world’s resources ATOM ECONOMY

Chemical companies must produce as much product as possible - use reactions with a high yield - make as least waste as possible Need to maximise atom economy: RAM of useful products x 100% RAM of start reactants Good news for: * company profits * environment - uses less of world’s resources ATOM ECONOMY

Ram of all products

py p mh w

% Atom economy = RAM of useful products x 100% RAM of all products

% Atom economy = RAM of useful products x 100% RAM of all products % Atom economy = 80 x 100% = 120

% Atom economy = RAM of useful products x 100% RAM of all products % Atom economy = 80 x 100% = 67% 120

% Yield = mass of useful products x 100% mass of all products

% Yield = mass of useful products x 100% mass of all products % Yield = 140 x 100% = 200

% Yield = mass of useful products x 100% mass of all products % Yield = 140 x 100% = 70% 200

60 g (A) …………………80 g (C) at 100% Yield

If the yield was only 50% and the same amount of product is required, then ?? x original reactants is needed.

60 g (A) …………………80 g (C) at 100% Yield If the yield was only 50% and the same amount of product is required, then 2 x original reactants is needed.

60 g (A) …………………80 g (C) at 100% Yield If the yield was only 50% and the same amount of product is required, then 2 x original reactants is needed. So if the yield is 75% and the same amount of product is required, then 4/3 x original reactants is needed: = 4/3 x60g = 80g