Assertion: phosphoric acid | /r/HasProperty | efficient technique
Facets:
value: highly
type: DEGREE
value: for washing the gypsum
type: PURPOSE
Source sentences:
text: Accordingly, it is an object of the present invention to provide a method for producing phosphoric acid which includes a highly efficient technique for washing the gypsum which is withdrawn as a by-product of the process, all the wash water being employed on the final crystal product, and none being expended on the washing of intermediate crystal products.