ES220749A1 - A procedure for the preparation of dimethyl-ditio-hidantoin (Machine-translation by Google Translate, not legally binding)
- Google Patents
A procedure for the preparation of dimethyl-ditio-hidantoin (Machine-translation by Google Translate, not legally binding)
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industrial Iberica Quimico Farmaceutica SA
Original Assignee
Industrial Iberica Quimico Farmaceutica SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industrial Iberica Quimico Farmaceutica SAfiledCriticalIndustrial Iberica Quimico Farmaceutica SA
Priority to ES220749ApriorityCriticalpatent/ES220749A1/en
Publication of ES220749A1publicationCriticalpatent/ES220749A1/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Process for the preparation of dimethyl-dithiohydantoin, which essentially consists of gently heating to boiling, in a flask provided with a long reflux condenser, a mixture in alcohol of 85º composed of sodium or potassium cyanide, ammonium chloride, acetone and carbon sulfide; continue boiling under reflux, for a time comprised between twenty-four or thirty hours, the alcohol is distilled; remnants of acetone or carbon disulfide that remained unreacted are removed by vapor current; the solid product dissolves in soda solution heated in a water bath; the alkaline solution is precipitated with concentrated hydrochloric acid until the blue litmus paper is reddened; it is filtered in the trunk, and the product is crystallized in water, in bright needles of pale yellow color. (Machine-translation by Google Translate, not legally binding)
ES220749A1955-03-151955-03-15A procedure for the preparation of dimethyl-ditio-hidantoin (Machine-translation by Google Translate, not legally binding)
ExpiredES220749A1
(en)
A procedure for the obtaining of license carbonate of elevated purity, particularly of brutous lyric chloride, in aquatic solution (Machine-translation by Google Translate, not legally binding)
A procedure for the total decoration of textile fibers and the obtaining of cellulose from vegetable fibers (Machine-translation by Google Translate, not legally binding)