. Journal. they areundergoing decomposition. (See Sahfeld ( Pat. 1878,201,704), Kuehue ( Pat. 1879, 215,372), Babbit ( 1883,275,976; 1885,316,104).) Clolus ( Pat. 1881, 242,272) recovers glycerin fromsoap lyes by neutralising the same with hydrochloric acid ;l!attcrshall (this Journal, 1883, 91) neutralises with sul-phuric acid ; whilst Domeier and Hagemann ( 371,127) precipitate the soapy matters as insolublesoaps, and subsequently concentrate the lye, the remainingfatty and resinous constituents being decomposed by hydro-chloric acid, and mechanically remove
. Journal. they areundergoing decomposition. (See Sahfeld ( Pat. 1878,201,704), Kuehue ( Pat. 1879, 215,372), Babbit ( 1883,275,976; 1885,316,104).) Clolus ( Pat. 1881, 242,272) recovers glycerin fromsoap lyes by neutralising the same with hydrochloric acid ;l!attcrshall (this Journal, 1883, 91) neutralises with sul-phuric acid ; whilst Domeier and Hagemann ( 371,127) precipitate the soapy matters as insolublesoaps, and subsequently concentrate the lye, the remainingfatty and resinous constituents being decomposed by hydro-chloric acid, and mechanically removed with clay oralumina. The manufacture of resin soap simultaneouslywith that of glycerin is covered by the last-mentionedpatentees ( Pat. 1888, 385,105) ; whilst Mining ( 1888, ) precipitates the fatty and resinousimpurities by the addition of barium or strontium chloride,and the latest attempts have been directed towards prevent-ing the mechanical occlusion of glycerin by the salts, this. Arr u:\tvs ron the Manufacture of Glycerin. being effected by the apparatus of Domeier aud Hagemann(I ,S. Iat. 1890, t28,468). A i- the boiler in which theconcentration is effected, 11 the enclosing brickwork, ( thefire space, I) the metal outer wall, E ami ]* girders, G thereceptacle for the precipitated salts ; it can be separatedfrom A by closing the valve II. G1 is a doorthrough whichthe collected matter is removed, Gr a strainer or perforatedplate. Soap lye or brine containing less glycerin than thatadhering to the mineral crystals can be admitted throughG\ the deposits remaining on the strainer Gr, whilst theliquid escapes by G. At the commencement of theoperation, A is tilled with soap lye, and as it is in communi-cation with (i, the latter is also tilled ; when the boilingliquor in A becomes more concentrated the precipitatesformed pass into (1. The apparatus is fed through G4, theliquor contained in G being thus pushed into the boilingportion. As soon as G is fille
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
