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US 11,919,877 B2Granted
Production method for 1,2,3,5,6-pentathiepane
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsHiroyuki Tanagi, Kouhei Takemura, Hiroshi Horikoshi
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Abstract
The present invention enables provision of a production method for 1,2,3,5,6-pentathiepane, the method comprising, in the following order, step A for reacting a trithiocarbonate, sulfur, and a methane dihalide together using a phase-transfer catalyst in a multilayer system having a water layer and an organic layer, step B for separating the water layer from the organic layer, and step C for stopping the reaction using an acid.
Claims8
A method for producing 1,2,3,5,6-pentathiepane, the method comprising Steps A, B and C in this order:
- Step A:
- reacting trithiocarbonate, sulfur and methane dihalide using a phase-transfer catalyst in a multi-layer system having an aqueous layer and an organic layer, wherein the multi-layer system is a two-layer system;
- Step B:
- separating the aqueous layer from the organic layer;
- and
- Step C:
- terminating the reaction with an acid,
- wherein the method further comprises purifying 1,2,3,5,6-pentathiepane from the organic layer, after step C.
5 more elements
Dependencies are inferred from the claim text.