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    • 4. 发明申请
    • RECOVERY OF HYDROGEN FLUORIDE FROM METALLIC FLUORIDE SALTS
    • 从金属氟化物盐中回收氟化氢
    • WO1981000099A1
    • 1981-01-22
    • PCT/US1979000400
    • 1979-07-06
    • OCCIDENTAL CHEM CO
    • OCCIDENTAL CHEM COHIRKO RMILLS H
    • C01B07/22
    • C01B7/196C01B7/191
    • Anhydrous hydrogen fluoride (44) of low P uO u content is recovered from metallic fluoride salts containing phosphate values by digesting the metallic salts (10) in sulfuric acid (14) at zone (16). Sufficient water and/or steam (12) is introduced into the zone to minimize the evolution of volatile fluophosphates encountered under conventional low humidity reactions. The dilute HF gas evolved (18) is rectified in two or more rectification zones (1, 2, 3) in series, where in at least one rectification zone, the rectification occurs in the presence of sulfuric acid (36). The product HF to P uO u weight ratio is greater than 10,000: 1.
    • 通过在(16)区域的硫酸(14)中消化金属盐(10),从含有磷酸盐的金属氟化物盐中回收低含量的u u u u的无水氟化氢(44)。 将足够的水和/或蒸汽(12)引入该区域以最小化在常规低湿度反应下遇到的挥发性氟磷酸盐的演变。 放出的稀释HF气体(18)在两个或更多个串联的精馏区(1,2,3)中进行精馏,其中在至少一个精馏区中,在硫酸存在下进行精馏(36)。 产物HF至尿素重量比大于10,000:1。
    • 9. 发明申请
    • PREPARING STERILE ARTICLES FROM POLYMERS CONTAINING A STABILISER BASED ON A POLY(OXYALKYLENE)
    • 基于聚合物(OXYALKYLENE)从含有稳定剂的聚合物制备无菌物品
    • WO0217972A3
    • 2002-09-06
    • PCT/GB0103889
    • 2001-08-30
    • OCCIDENTAL CHEM COSTEPHENS DINAH
    • WANG QINAGY SANDOR
    • A61L2/08C08F2/46C08J7/00C08K5/00C08L27/06C08L71/00C08K5/12
    • A61L2/081A61L2202/24C08K5/0008C08K5/12C08L27/06C08L71/02C08L2666/14C08L2666/22
    • A method of preparing a sterile article is disclosed. A polymer having a halogen-containing repeating unit is prepared that contains about 0.005 to about 65 phr of a stabiliser having the general formula TGOT', where each T is independently selected from R-, R-CO-, -P(R)2, -P(OR)2, Si(R)3, or -Si(OR)3, T' is T or A[GOT]n, each A is independently selected from LS-Sn(R)3-q(OLJ)q,(CH2)pS-Sn(R)3-q(S(CH2)p-J)q, LCO2Sn(R)3-q(OLCO-J)q, or LSn(Y)3-q(LJ)q when n is O, from CO, E, CO-E-CO, Si(R)2, Si(OR)2, (Si(R)2G)r, (CO-E-CO-G)r, (CO-G)r, or (E-G)r when n is 1, and from P, PO and trimellitate when n is 2, Y is -SLJ, -SLJ, -SLOR, -OLJ, -OLR, -S(CH2)p, each R is independently selected from R', aralkyl from C6 to C12, and aryl from C6 to C12, E is alkylene from C1 to C12, m is 1 to 20, n is 0 to 2, p is 0 to 10, q is 0 to 3 and r is 1 to 20. An article is made from the polymer and the article is sterilised with ionising radiation. Also disclosed are novel stabilisers for use in this method.
    • 公开了一种制备无菌制品的方法。 制备具有含卤素重复单元的聚合物,其含有约0.005至约65phr具有通式TGOT'的稳定剂,其中每个T独立地选自R-,R-CO-,-P(R)2 ,-P(OR)2,Si(R)3或-Si(OR)3,T'是T或A [GOT] n,每个A独立地选自LS-Sn(R)3-q )q,(CH 2)p -S-Sn(R)3-q(S(CH 2)pJ)q,LCO 2 Sn(R)3-q(OLCO-J)q或LSn(Y)3-q(LJ)q (CO),CO(CO)2,Si(OR)2,(Si(R)2G)r,(CO-E-CO-G) -G)r或(EG)r,当n为2时,P为PO和偏苯三酸,Y为-SLJ,-SLJ,-SLOR,-OLJ,-OLR,-S(CH2)p 每个R独立地选自R',C 6至C 12的芳烷基和C 6至C 12的芳基,E为C 1至C 12的亚烷基,m为1至20,n为0至2,p为0至10,q 为0〜3,r为1〜20。由聚合物制成制品,用电离辐射灭菌。 还公开了用于该方法的新型稳定剂。