Patent GB-456782-A (GB)
Title: The manufacture of seed disinfectant preparations
IPC: B25B13/10
Filed: 1935-09-30
Abstract: A seed disinfectant comprises an organic mercury compound of the formula R--Hg--C­C--Hg--R, wherein R represents a substituted or unsubstituted hydrocarbon radicle, together with a solid diluent such as finely-divided clay, chalk, talcum, kaolin, kieselguhr and silica gel.  In addition, other fungicides, stimulating agents, compounds capable of increasing the adhesiveness or agents to prevent dusting, may be present. Examples are given of mixtures of talcum with bis-isopropyl-mercuri-carbide, bis-methoxyethyl - mercuri - carbide, bis - ethoxyethyl-mercuri-carbide and bis-phenyl-mercuri-carbide, the product in each case having a mercury content of 1,5 to 3 per cent. The use of bis-butyl-, -isoamyl-, -cyclohexyl-, -tolyl-, -xylyl-, -benzyl-, -aminophenyl- and -nitrophenyl-mercuri-carbides is referred to.  The Specification as open to inspection under Sect. 91 states that the compositions are also useful for conservation and for other disinfecting purposes, e.g. for impregnating wood and preserving glue.  It also states that mercury compounds of the above formula are especially useful in which R stands for <FORM:0456782/IV/1> R<11> indicating either hydrogen or the same or different hydrocarbon radicles which may be arranged to form a nucleus and which may be substituted, whilst R<1> represents hydrogen or a substituted or unsubstituted hydrocarbon radicle.  In addition, reference is made to bis - ethanol-, -propanol-, -acetoxyethyl-, -acetoxypropyl-, -benzoyloxyethyl-, -methoxyethyl-, -ethoxyethyl-, -ethoxypropyl-, -phenoxyethyl-, -benzyloxyethyl-, -chloralhydrate-ethyl-, -chloral (ethylacetal) ethyl-, -chloral (isopropylacetal) ethyl- and - chloral (ethylacetal) cyclohexyl mercuri - carbides.  The preparation of the compositions by a one-stage process, in which the mercuri-carbide is produced in the presence of the diluent and/or the other ingredients, is described.  This subject - matter does not appear in the Specification as accepted.  Organic mercury compounds.--The above dimercuri-carbides are prepared by reacting with acetylene upon solutions of mercury compounds of the formula R--Hg--X, R being as above and X representing any salt-forming group; when working in alcoholic solution the products are precipitated.  Thus, by passing acetylene into an alkaline solution of isopropyl-mercuri-chloride, bis - isopropyl-mercuri-carbide is obtained; bis-phenyl-mercuri-carbide is similarly prepared from phenyl-mercuri-acetate.  Bis - methoxy- and -ethoxy - ethyl - mercuri-carbides result when acetylene is passed into an alkaline-alcoholic solution of methoxy- and ethoxy-ethylmercuri-chloride respectively.  The carbides are stable to water.ALSO:A seed disinfectant comprises an organic mercury compound of the formula R-Hg-C­C-Hg-R, wherein R represents a substituted or unsubstituted hydrocarbon radicle, together with a solid diluent such as finely-divided clay, chalk, talcum, kaolin, kieselguhr and silica gel.  In addition, other fungicides, stimulating agents, compounds capable of increasing the adhesiveness or agents to prevent dusting may be present Examples are given of mixtures of talcum with bis-isopropyl-mercuri-carbide, bis-methoxyethyl-mercuri-carbide, bis-ethoxyethyl-mercuri-carbide and bis-phenyl-mercuri-carbide, the product in each case having a mercury content of 1,5 to 3 per cent.  The use of bis-butyl-, -isoamyl-, -cyclohexyl-, -tolyl-, -xylyl-, -benzyl-, -aminophenyl- and -nitrophenyl-mercuri-carbides is referred to.  The Specification as open to inspection under Sect. 91 states that the compositions are also useful for conservation and for other disinfecting purposes, e.g. for impregnating wood and preserving glue.  It also states that mercury compounds of the above formula are especially useful in which R stands for <FORM:0456782/VI/1> R11 indicating either hydrogen or the same or different hydrocarbon radicles which may be arranged to form a nucleus and which may be substituted, whilst R1 represents hydrogen or a substituted or unsubstituted hydrocarbon radicle.  In addition, reference is made to bis-ethanol-, -propanol-, -acetoxyethyl-, -acetoxypropyl-, -benzoyloxyethyl-, -methoxyethyl-ethoxyethyl-, -ethoxypropyl-, -phenoxyethyl-, -benzyloxyethyl-, -chloralhydrate-ethyl-, -chloral (ethyl-acetal) ethyl-, -chloral (isopropylacetal) ethyl- and -chloral (ethylacetal) cyclohexyl-mercuri-carbides.  The preparation of the compositions by a one-stage process, in which the mercuri-carbide is produced in the presence of the diluent and/or the other ingredients, is described. This subject-matter does not appear in the Specification as accepted.