METHOD OF MANUFACTURE FOR HYDRAZINE COMPOSITION
A method includes reacting a mixture of hydrazine hydrate and hydroxyethylhydrazine with a nitrate to produce a product mixture that includes hydrazine hydrate, hydrazinium nitrate, hydroxyethylhydrazine, and hydroxyethylhydrazinium nitrate, and distilling the product mixture to produce a final mixture that includes hydrazine, hydroxyethylhydrazinium nitrate, and hydrazinium nitrate.
1 . A method comprising:
reacting a mixture of hydrazine hydrate and hydroxyethylhydrazine with a nitrate to produce a product mixture that includes hydrazine hydrate, hydrazinium nitrate, hydroxyethylhydrazine, and hydroxyethylhydrazinium nitrate; and
distilling the product mixture to produce a final mixture that includes hydrazine, hydroxyethylhydrazinium nitrate, and hydrazinium nitrate.
2 . The method as recited in claim 1 , wherein the nitrate is selected from the group consisting of ammonium nitrate and nitric acid.
3 . The method as recited in claim 1 , wherein the nitrate includes ammonium nitrate.
4 . The method as recited in claim 1 , wherein the nitrate includes nitric acid.
5 . The method as recited in claim 1 , wherein the nitrate is ammonium nitrate.
6 . The method as recited in claim 1 , wherein the nitrate is nitric acid.
7 . The method as recited in claim 1 , wherein the mixture of hydrazine hydrate and hydroxyethylhydrazine is produced by first reacting ethylene oxide and an excess of hydrazine hydrate to yield an intermediate mixture that includes the hydrazine hydrate, the hydroxyethylhydrazine, and bis(hydroxyethyl) hydrazine.
8 . The method as recited in claim 7 , further including distilling the intermediate mixture to substantially remove the bis(hydroxyethyl) hydrazine from the intermediate mixture to produce the mixture of hydrazine hydrate and hydroxyethylhydrazine.
9 . The method as recited in claim 1 , wherein the final mixture has a molar composition of 50-75% hydrazine, 15-35% hydroxyethylhydrazinium nitrate, and 5-15% hydrazinium nitrate.
10 . A method comprising:
producing a mixture of hydrazine hydrate and hydroxyethylhydrazine by reacting ethylene oxide and an excess of hydrazine hydrate to yield an intermediate mixture that includes the hydrazine hydrate, the hydroxyethylhydrazine, and bis(hydroxyethyl) hydrazine;
distilling the intermediate mixture to substantially remove the bis(hydroxyethyl) hydrazine from the intermediate mixture to produce the mixture of hydrazine hydrate and hydroxyethylhydrazine;
reacting the mixture of hydrazine hydrate and hydroxyethylhydrazine with a nitrate to produce a product mixture that includes hydrazine hydrate, hydrazinium nitrate, hydroxyethylhydrazine, and hydroxyethylhydrazinium nitrate; and
distilling the product mixture to yield a final mixture that includes hydrazine, hydroxyethylhydrazinium nitrate, and hydrazinium nitrate.
11 . The method as recited in claim 10 , wherein the nitrate is selected from the group consisting of ammonium nitrate and nitric acid.
12 . The method as recited in claim 10 , wherein the nitrate includes ammonium nitrate.
13 . The method as recited in claim 10 , wherein the nitrate includes nitric acid.
14 . The method as recited in claim 10 , wherein the nitrate is ammonium nitrate.
15 . The method as recited in claim 10 , wherein the nitrate is nitric acid.
16 . The method as recited in claim 10 , wherein a molar ratio of the the excess of hydrazine hydrate to the ethylene oxide is from 2:1 to 9:1.