Abstract: A method for converting carboxylic acids (including carboxylic acids derived from biomass) into hydrocarbons. The produced hydrocarbons will generally have at least two oxygen containing substituents (or other substituents). In one example of application, the electrolysis converts alkali salts of carboxylic acids into diols which can then be used as solvents or be dehydrated to produce dienes, which can then be used to produce elastic polymeric materials. This process allows custom synthesis of high value chemicals from renewable feed stocks such as carboxylic acids derived from biomass.
Abstract: One embodiment of the present invention provides a process, which includes:
electrochemically oxidizing at least one organic compound by bringing the organic compound into contact with an anode, wherein the anode includes:
an electrically conductive support; and
an electrically conductive, anodically polarized layer on the support;
wherein the anodically polarized layer is formed in situ upon the support by precoating; and
wherein the organic compound is not phosphonomethyliminodiacetic acid. Another embodiment of the present invention provides a product, produced by the above process.
Abstract: A process for preparing phthalides by
I. reducing phthalic acid or phthalic acid derivatives, where the carboxyl groups may be replaced by units which can be derived from the carboxyl groups by a condensation reaction and where one or more of the hydrogens of the o-phenylene unit may be substituted by inert radicals, at a cathode in a undivided electrolytic cell and dissolved in an electrolyte,
II. discharging the electrolyte from the electrolytic cell when the reaction has proceeded to the stage where the molar ratio (M), formed by the proportion of phthalide and the sum of the proportions of phthalide and phthalic acid of phthalic acid derivatives in the electrolyte, is from 0.8:1 to 0.995:1, and
III. crystallizing the phthalides from the electrolyte and removing them from the mother liquor, if appropriate after distillative work-up of the electrolyte is described.
March 20, 2000
Date of Patent:
November 13, 2001
Hermann Pütter, Dieter Baumann, Heinz Hannebaum
Abstract: An electrodeposition coating method characterized in that in electrodeposition coating of a water soluble composition of a polyimide precursor which is prepared by using 1,2,3,4-butanetetracarboxylic acid or its imide-forming derivative and a diamine and has a percentage of residual acid value of 30 to 3%, there is added previously a water soluble solvent selected from the group consisting of an alcoholic solvent, N-methyl-2-pyrrolidone, dimethylformamide and dimethylacetamide to the above-mentioned composition, and an electrodeposition coating agent used therefor. There can be provided the electrodeposition coating method practicable for the use of a water soluble polyimide composition which is capable of forming a uniform baked coating film having a continuous surface and being excellent in adhesivity to substrate and in toughness.