Abstract:
REACTION PRODUCTS OF NITROUS ACID AND 1.3-DICHLOROBUTENE-2 OR DISOBUTYLENE, USEFUL AS INHIBITORS OF "POPCORN" POLYMER FORMATION IN CHLOROPRENE POLYMERIZATION REACTIONS, ARE MADE BY A CONTROLLABLE PROCESS COMPRISING (1) ADDING AN ALKALI OR ALKALINE EARTH METAL NITRITE TO LIQUID 1,3-DICHLOROBUTENE-2 OR DIISOBUTYLENE WITH AGITATION, (2) SLOWLY ADDING CONCENTRATED HYDROCHLORIC OR SULFURIC ACID TO THE MIXTURE SO OBTAINED, AND (3) RECOVERING A REACTION PRODUCT OF NITROUS ACID AND 1,3-DICHLOROBUTENE2 OR DIISOBUTYLENE FROM THE BY-PRODUCT ALKALI OR ALKALINE EARTH METAL SALT FORMED.
Abstract:
Organic nitrites can be produced from a compound which is a mono/polyhydric alcohol or an aldehyde- or ketone-derivate thereof after de-aeration of the same, using NO gas, and stored in an environment saturated with gaseous NO. Organic nitrites produced according to the invention exhibit less impurities and improved storage stability compared to conventionally produced nitrites. The organic nitrites of the invention can easily be formulated into pharmaceutical compositions and have utility for the treatment of various conditions.
Abstract:
PROBLEM TO BE SOLVED: To provide a new method for producing C-Calkyl nitrite having advantage of high selectivity of C-Calkyl nitrite.SOLUTION: This method for producing C-Calkyl nitrite includes processes for: loading a resin catalyst layer and/or a porous filler layer into a reactor; passing nitrogen oxide, oxygen and C-Calcohol as raw materials through the resin catalyst layer and/or porous filler layer in a counter current, parallel current or cross current manner; and reacting under the reaction conditions including a reaction temperature of 0-150°C, a reaction pressure of -0.09 to 1.5 MPa, a molar ratio of C-Calkanol/nitrogen oxide of 1-100:1, a molar ratio of nitrogen oxide/oxygen of 4-50:1, to obtain waste liquid containing C-Calkyl nitrite; wherein the nitrogen oxide is NO, or a mixed gas containing NO and one or more selected from NOand NO.
Abstract:
A method for producing nitrous acid ester in which nitric oxide, oxygen, and an alcohol are reacted, thereby generating nitrous acid ester includes a step of generating nitrous acid ester by supplying a bottom liquid from a bottom part of the reaction column, and nitric oxide and/or carbon monoxide, a step of supplying nitrous acid ester to the reaction column; a step of supplying a reaction liquid containing water, nitric acid, and the alcohol to a nitric acid condensing column from the reactor; and a step of separating a low-boiling point component by distillation from the reaction liquid under control of a concentration of the alcohol in a condensed liquid being generated at a bottom part of the nitric acid condensing column to be less than 4.0% by weight so as to introduce the condensed liquid into the reactor from the nitric acid condensing column.
Abstract:
The present disclosure relates to devices and methods for the preparation of amyl nitrite formulations at a point of use location from relatively shelf-stable reagents employing acidic cationic exchange resins.
Abstract:
The present invention relates to a process for producing C1-C4 alkyl nitrite, comprising loading a resin catalyst layer and/or a porous filler layer into a reactor, passing nitrogen oxide, oxygen and C1-C4 alkanol as raw materials through the resin catalyst layer and/or porous filler layer in a counter current, parallel current or cross current manner, reacting under the conditions including a reaction temperature of from 0 to 150° C., a reaction pressure of from −0.09 to 1.5 MPa, a molar ratio of C1-C4 alkanol/nitrogen oxide of 1-100:1, a molar ratio of nitrogen oxide/oxygen of 4-50:1, to obtain an effluent containing C1-C4 alkyl nitrite, wherein said nitrogen oxide is NO, or a mixed gas containing NO and one or more selected from N2O3 and NO2.