Try this search over all volumes: densation product
Results 1-0 of 0
What people are saying - Write a review
We haven't found any reviews in the usual places.
95 per cent a-naphthol aldehyde ammonia aqueous solution cc of water cent solution cent sulphuric acid chromium compounds concentrated solution concentrated sulphuric acid condensation with formaldehyde cooling cresolsulphonic acids dark densation product digallic acid dilute solution dissolves readily elevated temperatures filling properties formalde furfurol g of sulphuric gallic acid glycollic acid grams of crystallized heating hide substance hydrochloric acid insoluble leather produced manufacture molecule moles naphthalene naphthol nitric acid official method ordinary temperature original naphthol paraldehyde partially neutralized patents phenolsulphonic acid phonated phosphorus oxychloride possess tanning properties presence product obtained PRODUCTS DERIVED proportion of formaldehyde pyrogallol reaction mixture readily sulphonated reagents resin resin obtained resorcinol sirupy small amount sodium hydroxide sodium phenolsulphonate soluble product solution of formaldehyde solution of sulphuric steam bath Stiasny sulphonated condensation products sulphonated cresylic acid sulphonated products sulphonation mixture syntans tannic acid tanning agents tanning test tannins treated unchanged phenol vegetable tanning materials yield