公开(公告)号：US3591332A

公开(公告)日：1971-07-06

申请号：US3591332D

申请日：1968-08-19

Applicant: US INTERIOR

Inventor： GEORGE D ARCY R ,  RILEY JAMES M

IPC: C01B17/16 ,  C01B17/32 ,  C01B17/44 ,  C01D7/00 ,  C01F11/26 ,  C01B7/16 ,  C01B11/24

CPC classification number: C01B17/44 ,  C01B17/164 ,  C01B17/32 ,  C01D7/00 ,  C01F11/26

Abstract: SULFUR IS PRODUCED FROM GYPSUM BY (1) ROASTING THE GYPSUM WITH CARBON OR A REDUCING GAS TO FORM CAS; (2) REACTING THE CAS WITH H2S AND WATER TO PRODUCE A SOLUTION OF CA(HS)2; (3) CONVERTING THE CA(HS)2 TO NAHS BY IONS EXCHANGE; (4) CARBONATING THE NAHS SOLUTION TO FORM H2S AND NAHCO3; (5) DECOMPOSING H2S AND NAHCO3 TO PRODUCE SULFUR AND NA2CO3, RESPECTIVELY.

公开(公告)号：US3580841A

公开(公告)日：1971-05-25

申请号：US3580841D

申请日：1969-07-31

Applicant: US INTERIOR

Inventor： CADOTTE JOHN E ,  FRANCIS PETER S

IPC: B01D69/12 ,  B01D71/08 ,  B01D71/12 ,  B01D13/00 ,  B01D31/00

CPC classification number: B01D71/08 ,  B01D69/122 ,  B01D71/12

Abstract: AN ULTRATHIN SEMIPERMEABLE REVERSE OSMOSIS MEMBRANE WHICH MAY BE MADE BY CASTING A CONCENTRATED POLYMER SOLUTION ON A LIQUID SURFACE AND THEN EVAPORATING, AND WHICH MAY BE LAMINATED WITH A SEPARATE POROUS SUPPORT MEMBRANE TO FORM A COMPOSITE REVERSE OSMOSIS MEMBRANE. A PROCESS OF SEPARATING SOLVENT FROM SOLUTION BY REVERSE OSMOSIS COMPRISING BRINGING THAT SOLUTION INTO CONTACT WITH A MEMBRANE COMPRISING A SEMIPERMEABLE ULTRATHIN MEMBRANE AT A PRESSURE ABOVE THE OSMOTIC PRESSURE.

公开(公告)号：US3576621A

公开(公告)日：1971-04-27

申请号：US3576621D

申请日：1969-04-23

Applicant: US INTERIOR

Inventor： KEITH GEORGE H ,  MATHEWS DAVID R

IPC: C22C27/02 ,  C22C27/00

CPC classification number: C22C27/025

Abstract: A VANADIUM-BASE ALLOY CONTAINING MOLYBDENUM, TITANIUM, YTRIUM AND CARBON EXHIBITS HIGH STRENGTH AS WELL AS GOOD FABRICABILITY. STRENGTH IS FURTHER IMPROVED BY ADDITION OF SILICON. THE ALLOY FINDS USE AS A STRUCTURAL MATERIAL IN INSTRUMENTS, PIPING, CONTAINERS, ETC.

公开(公告)号：US3574600A

公开(公告)日：1971-04-13

申请号：US3574600D

申请日：1968-05-15

Applicant: US INTERIOR

Inventor： SCHEINER BERNARD J ,  LINDSTROM ROALD E ,  HENRIE THOMAS A

IPC: C22B11/08

CPC classification number: C22B11/08

Abstract: CARBONACEOUS GOLD ORES ARE RENDERED AMENABLE TO A CONVENTIONAL CYANIDE RECOVERY PROCESS BY PRETREATMENT WITH ACID-OZONE MIXTURE, OR ALKALINE SODIUM HYPOCHLORITE OR ALKALINE CALCIUM HYPOCHLORITE COMPOUNDS AT TEMPERATURES UNDER 70*C. HYPOCHLORITE SOLUTIONS CAN BE GENERATED IN SITU BY ELECTROLYSIS OF CHLORIDE SOLUTIONS.

公开(公告)号：US3573182A

公开(公告)日：1971-03-30

申请号：US3573182D

申请日：1968-01-11

Applicant: US INTERIOR

Inventor： CHURCHWARD PHILIP E ,  BORROWMAN SAMUEL RALPH

IPC: C22B3/38 ,  C22B15/00 ,  C22D1/22 ,  C22B15/12

CPC classification number: C22B3/0068 ,  C22B15/0063 ,  Y02P10/234 ,  Y02P10/236

Abstract: ZINC IS PREFERENTIALLY EXTRACTED FROM SOLUTIONS CONTAINING COPPER AND ZINC IONS USING A CALCIUM SALT OF AN ORGANIC HYDROGEN PHOSPHATE. A COMPLETE PROCESS INCLUDING THE SELECTIVE EXTRACTION AND THE RECOVERY OF ZINC AND COPPER FROM THE ORGANIC AND AQUEOUS PHASES RESPECTIVELY IS DESCRIBED.

公开(公告)号：US3567427A

公开(公告)日：1971-03-02

申请号：US3567427D

申请日：1968-11-07

Applicant: US INTERIOR

Inventor： HUFF RAY V ,  HEATH LARMAN J

IPC: B03B1/00 ,  C22B1/02 ,  B02C19/12 ,  B02C19/18

CPC classification number: B03B1/00 ,  C22B1/02

Abstract: ROCK CONTAINING CERTAIN CLAY MINERALS IS CHEMICALLY DISAGGREGATED BY TREATMENT WITH A COMPOUND WHICH CAUSES A RUPTURING OR NEGATION OF THE BONDING BETWEEN UNIT CELLS OF THE CLAY MINERAL. THE CLAY MINERALS MAY BE ILLITE, ILLITETYPE, MIXED LATTICE MINERALS OF THE ILLITE TYPE OR MIXTURE THEREOF. THE TREATMENT COMPOUND MAY BE HYDRAZINE, HYDROGEN PEROXIDE OR MIXTURES THEREOF. THE TREATMENT OF THE CLAY MINERALS MAY BE IN SITU.

公开(公告)号：US3551123A

公开(公告)日：1970-12-29

申请号：US3551123D

申请日：1968-10-18

Applicant: HYDROCARBON RESEARCH INC ,  US INTERIOR ,  HAROLD H STOTLER

Inventor： STOTLER HAROLD H

IPC: C01B3/38 ,  B01J1/00 ,  C01B2/14 ,  F23J1/00

CPC classification number: C01B3/384 ,  Y02P20/129

公开(公告)号：US3536795A

公开(公告)日：1970-10-27

申请号：US3536795D

申请日：1967-11-06

Applicant: FRED C BURNETTE ,  US INTERIOR ,  AEROJET GENERAL CO

Inventor： BURNETTE FRED C

IPC: B29D21/00 ,  B29D7/02

CPC classification number: B01D67/0011 ,  B01D61/025 ,  B01D2323/16

公开(公告)号：US3508659A

公开(公告)日：1970-04-28

申请号：US3508659D

申请日：1969-04-02

Applicant: US INTERIOR

Inventor： BATES DANIEL W ,  MURPHEY ERNEST W

IPC: A01K69/00 ,  E02B1/00 ,  B01D29/02

CPC classification number: E02B1/006 ,  A01K69/00 ,  E02B1/003

公开(公告)号：US3507629A

公开(公告)日：1970-04-21

申请号：US3507629D

申请日：1966-02-10

Applicant: US INTERIOR

Inventor： IVERSON HENRY G ,  LEITCH HAROLD

IPC: C22B21/00 ,  B01D9/02 ,  B01D11/02

CPC classification number: C22B21/0015 ,  Y02P10/234